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  • Add animation when user control get visible and collapsed In Wpf

    - by sanjeev40084
    I have two xaml files MainWindow.xaml and other user control WorkDetail.xaml file. MainWindow.xaml file has a textbox, button, listbox and reference to WorkDetail.xaml(user control which is collapsed). Whenever user enter any text, it gets added in listbox when the add button is clicked. When any items from the listbox is double clicked, the visibility of WorkDetail.xaml is set to Visible and it gets displayed. In WorkDetail.xaml (user control) it has textblock and button. The Textblock displays the text of selected item and close button sets the visibility of WorkDetail window to collapsed. Now i am trying to animate WorkDetail.xaml when it gets visible and collapse. When any items from listbox is double clicked and WorkDetail.xaml visibility is set to visible, i want to create an animation of moving WorkDetail.xaml window from right to left on MainWindow. When Close button from WorkDetail.xaml file is clicked and WorkDetail.xaml file is collapsed, i want to slide the WorkDetail.xaml file from left to right from MainWindow. Here is the screenshot: MainWindow.xaml code: <Window...> <Grid Background="Black" > <TextBox x:Name="enteredWork" Height="39" Margin="44,48,49,0" TextWrapping="Wrap" VerticalAlignment="Top"/> <ListBox x:Name="workListBox" Margin="26,155,38,45" FontSize="29.333" MouseDoubleClick="workListBox_MouseDoubleClick"/> <Button x:Name="addWork" Content="Add" Height="34" Margin="71,103,120,0" VerticalAlignment="Top" Click="Button_Click"/> <TestWpf:WorkDetail x:Name="WorkDetail" Visibility="Collapsed"/> </Grid> </Window> MainWindow.xaml.cs class code: namespace TestWpf { public partial class MainWindow : Window { public MainWindow() { this.InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { workListBox.Items.Add(enteredWork.Text); } private void workListBox_MouseDoubleClick(object sender, MouseButtonEventArgs e) { WorkDetail.workTextBlk.Text = (string)workListBox.SelectedItem; WorkDetail.Visibility = Visibility.Visible; } } } WorkDetail.xaml code: <UserControl ..> <Grid Background="#FFD2CFCF"> <TextBlock x:Name="workTextBlk" Height="154" Margin="33,50,49,0" TextWrapping="Wrap" VerticalAlignment="Top" FontSize="29.333" Background="#FFF13939"/> <Button x:Name="btnClose" Content="Close" Height="62" Margin="70,0,94,87" VerticalAlignment="Bottom" Click="btnClose_Click"/> </Grid> </UserControl> WorkDetail.xaml.cs class code: namespace TestWpf { public partial class WorkDetail : UserControl { public WorkDetail() { this.InitializeComponent(); } private void btnClose_Click(object sender, System.Windows.RoutedEventArgs e) { Visibility = Visibility.Collapsed; } } } Can anyone tell how can i do this?

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  • WPF: how to find an element in a datatemplate from an itemscontrol

    - by EV
    Hi, I have the following problem: the application is using the custom itemscontrol called ToolBox. The elements of a toolbox are called toolboxitems and are custom contentcontrol. Now, the toolbox stores a number of images that are retrieved from a database and displayed. For that I use a datatemplate inside the toolbox control. However, when I try to drag and drop the elements, I don't get the image object but the database component. I thought that I should then traverse the structure to find the Image element. here's the code: Toolbox: public class Toolbox : ItemsControl { private Size defaultItemSize = new Size(65, 65); public Size DefaultItemSize { get { return this.defaultItemSize; } set { this.defaultItemSize = value; } } protected override DependencyObject GetContainerForItemOverride() { return new ToolboxItem(); } protected override bool IsItemItsOwnContainerOverride(object item) { return (item is ToolboxItem); } } ToolBoxItem: public class ToolboxItem : ContentControl { private Point? dragStartPoint = null; static ToolboxItem() { FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(ToolboxItem), new FrameworkPropertyMetadata(typeof(ToolboxItem))); } protected override void OnPreviewMouseDown(MouseButtonEventArgs e) { base.OnPreviewMouseDown(e); this.dragStartPoint = new Point?(e.GetPosition(this)); } public String url { get; private set; } protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove(e); if (e.LeftButton != MouseButtonState.Pressed) { this.dragStartPoint = null; } if (this.dragStartPoint.HasValue) { Point position = e.GetPosition(this); if ((SystemParameters.MinimumHorizontalDragDistance <= Math.Abs((double)(position.X - this.dragStartPoint.Value.X))) || (SystemParameters.MinimumVerticalDragDistance <= Math.Abs((double)(position.Y - this.dragStartPoint.Value.Y)))) { string xamlString = XamlWriter.Save(this.Content); MessageBoxResult result = MessageBox.Show(xamlString); DataObject dataObject = new DataObject("DESIGNER_ITEM", xamlString); if (dataObject != null) { DragDrop.DoDragDrop(this, dataObject, DragDropEffects.Copy); } } e.Handled = true; } } private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++) { DependencyObject child = VisualTreeHelper.GetChild(obj, i); if (child != null && child is childItem) return (childItem)child; else { childItem childOfChild = FindVisualChild<childItem>(child); if (childOfChild != null) return childOfChild; } } return null; } } here is the xaml file for ToolBox and toolbox item: <Style TargetType="{x:Type s:ToolboxItem}"> <Setter Property="Control.Padding" Value="5" /> <Setter Property="ContentControl.HorizontalContentAlignment" Value="Stretch" /> <Setter Property="ContentControl.VerticalContentAlignment" Value="Stretch" /> <Setter Property="ToolTip" Value="{Binding ToolTip}" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type s:ToolboxItem}"> <Grid> <Rectangle Name="Border" StrokeThickness="1" StrokeDashArray="2" Fill="Transparent" SnapsToDevicePixels="true" /> <ContentPresenter Content="{TemplateBinding ContentControl.Content}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" ContentTemplate="{TemplateBinding ContentTemplate}"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Setter TargetName="Border" Property="Stroke" Value="Gray" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <Style TargetType="{x:Type s:Toolbox}"> <Setter Property="SnapsToDevicePixels" Value="true" /> <Setter Property="Focusable" Value="False" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate> <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="{TemplateBinding Control.Padding}" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}" SnapsToDevicePixels="True"> <ScrollViewer VerticalScrollBarVisibility="Auto"> <ItemsPresenter SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" /> </ScrollViewer> </Border> </ControlTemplate> </Setter.Value> </Setter> <Setter Property="ItemsPanel"> <Setter.Value> <ItemsPanelTemplate> <WrapPanel Margin="0,5,0,5" ItemHeight="{Binding Path=DefaultItemSize.Height, RelativeSource={RelativeSource AncestorType=s:Toolbox}}" ItemWidth="{Binding Path=DefaultItemSize.Width, RelativeSource={RelativeSource AncestorType=s:Toolbox}}" /> </ItemsPanelTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> Example usage: <Toolbox x:Name="NewLibrary" DefaultItemSize="55,55" ItemsSource="{Binding}" > <ItemsControl.ItemTemplate> <DataTemplate> <StackPanel> <Image Source="{Binding Path=url}" /> </StackPanel> </DataTemplate> </ItemsControl.ItemTemplate> </Toolbox> The object that I get is a database object. When using a static resource I get the Image object. How to retrieve this Image object from a datatemplate? I though that I could use this tutorial: http://msdn.microsoft.com/en-us/library/bb613579.aspx But it does not seem to solve the problem. Could anyone suggest a solution? Thanks!

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  • WPF ComboBox Binding to non string object

    - by Mike L
    I'm using MVVM (MVVM Light Toolkit) and have a property on the view model which exposes a list of objects. The objects contain two properties, both strings, which correlate to an abbreviation and a description. I want the ComboBox to expose the pairing as "abbreviation - description". If I use a data template, it does this easily. I have another property on the view model which represents the object that should display as selected -- the chosen item in the ComboBox. I'm binding the ItemsSource to the list, as it represents the universe of available selections, and am trying to bind the SelectedItem to this object. I'm killing myself trying to figure out why I can't get it to work, and feeling more like a fraud by the hour. In trying to learn why this works, I created the same approach with just a list of strings, and a selected string. This works perfectly. So, it clearly has something to do with the typing... perhaps something in choosing equality? Or perhaps it has to do with the data template? Here is the XAML: <Window x:Class="MvvmLight1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="300" Width="300" DataContext="{Binding Main, Source={StaticResource Locator}}"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Skins/MainSkin.xaml" /> </ResourceDictionary.MergedDictionaries> <DataTemplate x:Key="DataTemplate1"> <StackPanel Orientation="Horizontal"> <TextBlock TextWrapping="Wrap" Text="{Binding CourtCode}"/> <TextBlock TextWrapping="Wrap" Text=" - "/> <TextBlock TextWrapping="Wrap" Text="{Binding CourtDescription}"/> </StackPanel> </DataTemplate> </ResourceDictionary> </Window.Resources> <Grid x:Name="LayoutRoot"> <ComboBox x:Name="cmbAbbrevDescriptions" Height="35" Margin="25,75,25,25" VerticalAlignment="Top" ItemsSource="{Binding Codes}" ItemTemplate="{DynamicResource DataTemplate1}" SelectedItem="{Binding selectedCode}" /> <ComboBox x:Name="cmbStrings" Height="35" Margin="25" VerticalAlignment="Top" ItemsSource="{Binding strs}" SelectedItem="{Binding selectedStr}"/> </Grid> </Window> And, if helpful, here is the ViewModel: using GalaSoft.MvvmLight; using MvvmLight1.Model; using System.Collections.Generic; namespace MvvmLight1.ViewModel { public class MainViewModel : ViewModelBase { public const string CodesPropertyName = "Codes"; private List<Court> _codes = null; public List<Court> Codes { get { return _codes; } set { if (_codes == value) { return; } var oldValue = _codes; _codes = value; // Update bindings and broadcast change using GalaSoft.Utility.Messenging RaisePropertyChanged(CodesPropertyName, oldValue, value, true); } } public const string selectedCodePropertyName = "selectedCode"; private Court _selectedCode = null; public Court selectedCode { get { return _selectedCode; } set { if (_selectedCode == value) { return; } var oldValue = _selectedCode; _selectedCode = value; // Update bindings and broadcast change using GalaSoft.Utility.Messenging RaisePropertyChanged(selectedCodePropertyName, oldValue, value, true); } } public const string strsPropertyName = "strs"; private List<string> _strs = null; public List<string> strs { get { return _strs; } set { if (_strs == value) { return; } var oldValue = _strs; _strs = value; // Update bindings and broadcast change using GalaSoft.Utility.Messenging RaisePropertyChanged(strsPropertyName, oldValue, value, true); } } public const string selectedStrPropertyName = "selectedStr"; private string _selectedStr = ""; public string selectedStr { get { return _selectedStr; } set { if (_selectedStr == value) { return; } var oldValue = _selectedStr; _selectedStr = value; // Update bindings and broadcast change using GalaSoft.Utility.Messenging RaisePropertyChanged(selectedStrPropertyName, oldValue, value, true); } } /// <summary> /// Initializes a new instance of the MainViewModel class. /// </summary> public MainViewModel() { Codes = new List<Court>(); Court code1 = new Court(); code1.CourtCode = "ABC"; code1.CourtDescription = "A Court"; Court code2 = new Court(); code2.CourtCode = "DEF"; code2.CourtDescription = "Second Court"; Codes.Add(code1); Codes.Add(code2); Court code3 = new Court(); code3.CourtCode = "DEF"; code3.CourtDescription = "Second Court"; selectedCode = code3; selectedStr = "Hello"; strs = new List<string>(); strs.Add("Goodbye"); strs.Add("Hello"); strs.Add("Ciao"); } } } And here is the ridiculously trivial class that is being exposed: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace MvvmLight1.Model { public class Court { public string CourtCode { get; set; } public string CourtDescription { get; set; } } } Thanks!

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  • AD Password About to Expire check problem with ASP.Net

    - by Vince
    Hello everyone, I am trying to write some code to check the AD password age during a user login and notify them of the 15 remaining days. I am using the ASP.Net code that I found on the Microsoft MSDN site and I managed to add a function that checks the if the account is set to change password at next login. The login and the change password at next login works great but I am having some problems with the check for the password age. This is the VB.Net code for the DLL file: Imports System Imports System.Text Imports System.Collections Imports System.DirectoryServices Imports System.DirectoryServices.AccountManagement Imports System.Reflection 'Needed by the Password Expiration Class Only -Vince Namespace FormsAuth Public Class LdapAuthentication Dim _path As String Dim _filterAttribute As String 'Code added for the password expiration added by Vince Private _domain As DirectoryEntry Private _passwordAge As TimeSpan = TimeSpan.MinValue Const UF_DONT_EXPIRE_PASSWD As Integer = &H10000 'Function added by Vince Public Sub New() Dim root As New DirectoryEntry("LDAP://rootDSE") root.AuthenticationType = AuthenticationTypes.Secure _domain = New DirectoryEntry("LDAP://" & root.Properties("defaultNamingContext")(0).ToString()) _domain.AuthenticationType = AuthenticationTypes.Secure End Sub 'Function added by Vince Public ReadOnly Property PasswordAge() As TimeSpan Get If _passwordAge = TimeSpan.MinValue Then Dim ldate As Long = LongFromLargeInteger(_domain.Properties("maxPwdAge")(0)) _passwordAge = TimeSpan.FromTicks(ldate) End If Return _passwordAge End Get End Property Public Sub New(ByVal path As String) _path = path End Sub 'Function added by Vince Public Function DoesUserHaveToChangePassword(ByVal userName As String) As Boolean Dim ctx As PrincipalContext = New PrincipalContext(System.DirectoryServices.AccountManagement.ContextType.Domain) Dim up = UserPrincipal.FindByIdentity(ctx, userName) Return (Not up.LastPasswordSet.HasValue) 'returns true if last password set has no value. End Function Public Function IsAuthenticated(ByVal domain As String, ByVal username As String, ByVal pwd As String) As Boolean Dim domainAndUsername As String = domain & "\" & username Dim entry As DirectoryEntry = New DirectoryEntry(_path, domainAndUsername, pwd) Try 'Bind to the native AdsObject to force authentication. Dim obj As Object = entry.NativeObject Dim search As DirectorySearcher = New DirectorySearcher(entry) search.Filter = "(SAMAccountName=" & username & ")" search.PropertiesToLoad.Add("cn") Dim result As SearchResult = search.FindOne() If (result Is Nothing) Then Return False End If 'Update the new path to the user in the directory. _path = result.Path _filterAttribute = CType(result.Properties("cn")(0), String) Catch ex As Exception Throw New Exception("Error authenticating user. " & ex.Message) End Try Return True End Function Public Function GetGroups() As String Dim search As DirectorySearcher = New DirectorySearcher(_path) search.Filter = "(cn=" & _filterAttribute & ")" search.PropertiesToLoad.Add("memberOf") Dim groupNames As StringBuilder = New StringBuilder() Try Dim result As SearchResult = search.FindOne() Dim propertyCount As Integer = result.Properties("memberOf").Count Dim dn As String Dim equalsIndex, commaIndex Dim propertyCounter As Integer For propertyCounter = 0 To propertyCount - 1 dn = CType(result.Properties("memberOf")(propertyCounter), String) equalsIndex = dn.IndexOf("=", 1) commaIndex = dn.IndexOf(",", 1) If (equalsIndex = -1) Then Return Nothing End If groupNames.Append(dn.Substring((equalsIndex + 1), (commaIndex - equalsIndex) - 1)) groupNames.Append("|") Next Catch ex As Exception Throw New Exception("Error obtaining group names. " & ex.Message) End Try Return groupNames.ToString() End Function 'Function added by Vince Public Function WhenExpires(ByVal username As String) As TimeSpan Dim ds As New DirectorySearcher(_domain) ds.Filter = [String].Format("(&(objectClass=user)(objectCategory=person)(sAMAccountName={0}))", username) Dim sr As SearchResult = FindOne(ds) Dim user As DirectoryEntry = sr.GetDirectoryEntry() Dim flags As Integer = CInt(user.Properties("userAccountControl").Value) If Convert.ToBoolean(flags And UF_DONT_EXPIRE_PASSWD) Then 'password never expires Return TimeSpan.MaxValue End If 'get when they last set their password Dim pwdLastSet As DateTime = DateTime.FromFileTime(LongFromLargeInteger(user.Properties("pwdLastSet").Value)) ' return pwdLastSet.Add(PasswordAge).Subtract(DateTime.Now); If pwdLastSet.Subtract(PasswordAge).CompareTo(DateTime.Now) > 0 Then Return pwdLastSet.Subtract(PasswordAge).Subtract(DateTime.Now) Else Return TimeSpan.MinValue 'already expired End If End Function 'Function added by Vince Private Function LongFromLargeInteger(ByVal largeInteger As Object) As Long Dim type As System.Type = largeInteger.[GetType]() Dim highPart As Integer = CInt(type.InvokeMember("HighPart", BindingFlags.GetProperty, Nothing, largeInteger, Nothing)) Dim lowPart As Integer = CInt(type.InvokeMember("LowPart", BindingFlags.GetProperty, Nothing, largeInteger, Nothing)) Return CLng(highPart) << 32 Or CUInt(lowPart) End Function 'Function added by Vince Private Function FindOne(ByVal searcher As DirectorySearcher) As SearchResult Dim sr As SearchResult = Nothing Dim src As SearchResultCollection = searcher.FindAll() If src.Count > 0 Then sr = src(0) End If src.Dispose() Return sr End Function End Class End Namespace And this is the Login.aspx page: sub Login_Click(sender as object,e as EventArgs) Dim adPath As String = "LDAP://DC=xxx,DC=com" 'Path to your LDAP directory server Dim adAuth As LdapAuthentication = New LdapAuthentication(adPath) Try If (True = adAuth.DoesUserHaveToChangePassword(txtUsername.Text)) Then Response.Redirect("passchange.htm") ElseIf (True = adAuth.IsAuthenticated(txtDomain.Text, txtUsername.Text, txtPassword.Text)) Then Dim groups As String = adAuth.GetGroups() 'Create the ticket, and add the groups. Dim isCookiePersistent As Boolean = chkPersist.Checked Dim authTicket As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, _ txtUsername.Text, DateTime.Now, DateTime.Now.AddMinutes(60), isCookiePersistent, groups) 'Encrypt the ticket. Dim encryptedTicket As String = FormsAuthentication.Encrypt(authTicket) 'Create a cookie, and then add the encrypted ticket to the cookie as data. Dim authCookie As HttpCookie = New HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket) If (isCookiePersistent = True) Then authCookie.Expires = authTicket.Expiration End If 'Add the cookie to the outgoing cookies collection. Response.Cookies.Add(authCookie) 'Retrieve the password life Dim t As TimeSpan = adAuth.WhenExpires(txtUsername.Text) 'You can redirect now. If (passAge.Days = 90) Then errorLabel.Text = "Your password will expire in " & DateTime.Now.Subtract(t) 'errorLabel.Text = "This is" 'System.Threading.Thread.Sleep(5000) Response.Redirect("http://somepage.aspx") Else Response.Redirect(FormsAuthentication.GetRedirectUrl(txtUsername.Text, False)) End If Else errorLabel.Text = "Authentication did not succeed. Check user name and password." End If Catch ex As Exception errorLabel.Text = "Error authenticating. " & ex.Message End Try End Sub ` Every time I have this Dim t As TimeSpan = adAuth.WhenExpires(txtUsername.Text) enabled, I receive "Arithmetic operation resulted in an overflow." during the login and won't continue. What am I doing wrong? How can I correct this? Please help!! Thank you very much for any help in advance. Vince

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  • Simple Remote Shared Object with Red5 Flash Server

    - by John Russell
    Hello, I am trying to create a simple chat client using the red5 media server, but I seem to be having a slight hiccup. I am creating a shared object on the server side, and it seems to be creating it successfully. However, when I make changes to the object via the client (type a message), the SYNC event fires, but the content within the shared object remains empty. I suspect I am doing something wrong on the java end, any advice? Console Results: Success! Server Message: clear Server Message: [object Object] Local message: asdf Server Message: change Server Message: [object Object] Local message: fdsa Server Message: change Server Message: [object Object] Local message: fewa Server Message: change Server Message: [object Object] Server Side: package org.red5.core; import java.util.List; import org.red5.server.adapter.ApplicationAdapter; import org.red5.server.api.IConnection; import org.red5.server.api.IScope; import org.red5.server.api.service.ServiceUtils; import org.red5.server.api.so.ISharedObject; // import org.apache.commons.logging.Log; // import org.apache.commons.logging.LogFactory; public class Application extends ApplicationAdapter { private IScope appScope; // private static final Log log = LogFactory.getLog( Application.class ); /** {@inheritDoc} */ @Override public boolean connect(IConnection conn, IScope scope, Object[] params) { appScope = scope; createSharedObject(appScope, "generalChat", false); // Creates general chat shared object return true; } /** {@inheritDoc} */ @Override public void disconnect(IConnection conn, IScope scope) { super.disconnect(conn, scope); } public void updateChat(Object[] params) { ISharedObject so = getSharedObject(appScope, "generalChat"); // Declares and stores general chat data in general chat shared object so.setAttribute("point", params[0].toString()); } } Client Side: package { import flash.display.MovieClip; import flash.events.*; import flash.net.*; // This class is going to handle all data to and from from media server public class SOConnect extends MovieClip { // Variables var nc:NetConnection = null; var so:SharedObject; public function SOConnect():void { } public function connect():void { // Create a NetConnection and connect to red5 nc = new NetConnection(); nc.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler); nc.connect("rtmp://localhost/testChat"); // Create a StoredObject for general chat so = SharedObject.getRemote("generalChat", nc.uri, false); so.connect(nc); so.addEventListener(SyncEvent.SYNC, receiveChat) } public function sendChat(msg:String) { trace ("Local message: " + msg); nc.call("updateChat", null, msg) } public function receiveChat(e:SyncEvent):void { for (var i in e.changeList) { trace ("Server Message: " + e.changeList[i].code) trace ("Server Message: " + e.changeList[i]) } } // Given result, determine successful connection private function netStatusHandler(e:NetStatusEvent):void { if (e.info.code == "NetConnection.Connect.Success") { trace("Success!"); } else { trace("Failure!\n"); trace(e.info.code); } } } }

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  • C# Secure Sockets (SSL)

    - by Matthias Vance
    LS, I was planning on writing a wrapper around the System.Net.Sockets.Socket class, because I didn't feel like using the SSLStream class because I wanted to maintain backwards compatibility with other programs. I found an article which does exactly what I want, but on Windows Mobile. (Link: Enable SSL for managed socket on windows mobile) Quote: My first surprise was that SetSocketOption takes a SocketOptionName enum value as the second parameter, but this enum doesn’t have the equivalent of SO_SECURE. However, C# was nice enough to let me cast an arbitrary integer value to the enum I needed. I tried to do the same, but it doesn't work. Code: private const ushort SO_SECURE = 0x2001; private const ushort SO_SEC_SSL = 0x2004; this.SetSocketOption(SocketOptionLevel.Socket, (SocketOptionName) SO_SECURE, SO_SEC_SSL); Error: An unknown, invalid, or unsupported option or level was specified in a getsockopt or setsockopt call Is there a way to work around this? Kind regards, Matthias Vance

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  • How to Resolve Jason issue

    - by Mohammad Nezhad
    I am working in a web scheduling application which uses DayPilot component I started by reading the documentation and use the calendar control. but whenever I do some thing which (fires an event on the Daypilot control) I face with following error An exception was thrown in the server-side event handler: System.InvalidCastException: Instance Of JasonData doesn't hold a double at DayPilot.Jason.JasonData.op_Explicit(JasonData data) at DayPilot.Web.Ui.Events.EventMoveEventArgs..ctor(JasonData parameters, string[] fields, JasonData data) at DayPilot.Web.Ui.DayPilotCalendar.ExecuteEventJASON(String ea) at DayPilot.Web.Ui.DayPilotCalendar.System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent(string ea) at System.Web.UI.Page.PrepareCallback(String callbackControlID) here is the completed code in the ASPX page <DayPilot:DayPilotCalendar ID="DayPilotCalendar1" runat="server" Direction="RTL" Days="7" DataStartField="eventstart" DataEndField="eventend" DataTextField="name" DataValueField="id" DataTagFields="State" EventMoveHandling="CallBack" OnEventMove="DayPilotCalendar1_EventMove" EventEditHandling="CallBack" OnEventEdit="DayPilotCalendar1_EventEdit" EventClickHandling="Edit" OnBeforeEventRender="DayPilotCalendar1_BeforeEventRender" EventResizeHandling="CallBack" OnEventResize="DayPilotCalendar1_EventResize" EventDoubleClickHandling="CallBack" OnEventDoubleClick="DayPilotCalendar1_EventDoubleClick" oncommand="DayPilotCalendar1_Command" and here is the complete codebehind protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) Initialization(); } private void dbUpdateEvent(string id, DateTime start, DateTime end) { // update for move using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["db"].ConnectionString)) { con.Open(); SqlCommand cmd = new SqlCommand("UPDATE [event] SET [eventstart] = @start, [eventend] = @end WHERE [id] = @id", con); cmd.Parameters.AddWithValue("id", id); cmd.Parameters.AddWithValue("start", start); cmd.Parameters.AddWithValue("end", end); cmd.ExecuteNonQuery(); } } private DataTable dbGetEvents(DateTime start, int days) { // get Data SqlDataAdapter da = new SqlDataAdapter("SELECT [id], [name], [eventstart], [eventend], [state], [other] FROM [event] WHERE NOT (([eventend] <= @start) OR ([eventstart] >= @end))", ConfigurationManager.ConnectionStrings["DayPilotTest"].ConnectionString); ; da.SelectCommand.Parameters.AddWithValue("start", start); da.SelectCommand.Parameters.AddWithValue("end", start.AddDays(days)); DataTable dt = new DataTable(); da.Fill(dt); return dt; } protected void DayPilotCalendar1_EventMove(object sender, DayPilot.Web.Ui.Events.EventMoveEventArgs e) { // Drag and Drop dbUpdateEvent(e.Value, e.NewStart, e.NewEnd); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } private void Initialization() { // first bind DayPilotCalendar1.StartDate = DayPilot.Utils.Week.FirstDayOfWeek(new DateTime(2009, 1, 1)); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DataBind(); } protected void DayPilotCalendar1_BeforeEventRender(object sender, BeforeEventRenderEventArgs e) { // change the color based on state if (e.Tag["State"] == "Fixed") { e.DurationBarColor = "Brown"; } } protected void DayPilotCalendar1_EventResize(object sender, DayPilot.Web.Ui.Events.EventResizeEventArgs e) { dbUpdateEvent(e.Value, e.NewStart, e.NewEnd); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } protected void DayPilotCalendar1_EventDoubleClick(object sender, EventClickEventArgs e) { dbInsertEvent(e.Text , e.Start, e.End, "New", "New Meeting"); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } note that I remove unnecessary code behinds

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  • VB.NET DownloadDataAsync:

    - by Brett
    Hi everybody, I am having the worst trouble getting around a bug, and am hoping that I can get some advice on this site. In short, I am trying to make an asynchronous web service call from my VB.NET application. But my "client_DownloadDataCompleted" callback is NEVER being called when the download is complete. Here is my complete code: Public Sub BeginAsyncDownload(ByVal Url As String) Dim waiter As System.Threading.AutoResetEvent = New System.Threading.AutoResetEvent(False) Dim client As WebClient = New WebClient() 'client_DownloadDataCompleted method gets called when the download completes. AddHandler client.DownloadDataCompleted, AddressOf client_DownloadDataCompleted Dim uri As Uri = New Uri(Url) Downloading = True 'Class variable defined elsewhere client.DownloadDataAsync(uri, waiter) End Sub Private Sub client_DownloadDataCompleted(ByVal sender As Object, ByVal e As AsyncCompletedEventArgs) MessageBox.Show("Download Completed") Downloading = False Debug.Print("Downloaded") End Sub Again, the client_DownloadDataCompleted method is never being called. I have also tried using the method: Private Sub client_DownloadDataCompleted(ByVal sender As Object, ByVal e As DownloadDataCompletedEventArgs) With no luck. What I really need is that "Downloading" variable to be switched off when the download is complete. Thanks in advance! Brett

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  • Custom JComponent not displaying in Custom JPanel

    - by Trizicus
    I've tried the add() method but nothing is displayed when I try to add Test to GraphicsTest. How should I be adding it? Can someone show me? I've included the code I'm using. import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.JComponent; public class Test extends JComponent { Test() { setOpaque(false); setBackground(Color.white); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.setColor(Color.red); g2d.drawString("Hello", 50, 50); g2d.dispose(); } } import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.geom.Rectangle2D; import javax.swing.JPanel; public class GraphicsTest extends JPanel implements MouseListener { private Graphics2D g2d; private String state; private int x, y; GraphicsTest() { add(new Test()); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); g2d = (Graphics2D) g; g2d.setColor(Color.BLACK); g2d.drawString("STATE: " + state, 5, 15); g2d.drawString("Mouse Position: " + x + ", " + y, 5, 30); g2d.setColor(Color.red); Rectangle2D r2d = new Rectangle2D.Double(x, y, 10, 10); g2d.draw(r2d); g2d.dispose(); } public void setState(String state) { this.state = state; } public String getState() { return state; } public void setX(int x) { this.x = x; repaint(); } public void setY(int y) { this.y = y; repaint(); } public void mouseClicked(MouseEvent e) {} public void mousePressed(MouseEvent e) {} public void mouseReleased(MouseEvent e) {} public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} }

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  • Binding Contents of a ListBox to Selected Item from Another Listbox w/JSF & Managed Beans

    - by nieltown
    Hi there! I currently have a JSF application that uses two listboxes. The first, say ListBox1, contains a list of manufacturers; each option comes from the database (via a method getManufacturers in a class called QueryUtil), is populated dynamically, and its value is an integer ID. This part works so far. My goal is to populate a second listbox, say ListBox2, with a list of products sold by the manufacturer. This list of products will come from the database as well (products are linked to a manufacturer via a foreign key relationship, via a method getProducts in my QueryUtil class). How do I go about doing this? Please bear in mind that I've been working with JSF for under 24 hours; I'm willing to accept the fact that I'm missing something very rudimentary. Again, I've been able to populate the list of manufacturers just fine; unfortunately, adding the Products component gives me java.lang.IllegalArgumentException: argument type mismatch faces-config.xml <managed-bean> <managed-bean-name>ProductsBean</managed-bean-name> <managed-bean-class>com.nieltown.ProductsBean</managed-bean-class> <managed-bean-scope>request</managed-bean-scope> <managed-property> <property-name>manufacturers</property-name> <property-class>java.util.ArrayList</property-class> <value>#{manufacturers}</value> </managed-property> <managed-property> <property-name>selectedManufacturer</property-name> <property-class>java.lang.Integer</property-name> <value>#{selectedManufacturer}</value> </managed-property> <managed-property> <property-name>products</property-name> <property-class>java.util.ArrayList</property-class> <value>#{products}</value> </managed-property> <managed-property> <property-name>selectedProduct</property-name> <property-class>java.lang.Integer</property-name> <value>#{selectedProducts}</value> <managed-property> </managed-bean> com.nieltown.ProductsBean public class ProductsBean { private List<SelectItem> manufacturers; private List<SelectItem> products; private Integer selectedManufacturer; private Integer selectedProduct; public ProductsBean() {} public Integer getSelectedManufacturer(){ return selectedManufacturer; } public void setSelectedManufacturer(Integer m){ selectedManufacturer = m; } public Integer getSelectedProduct(){ return selectedProduct; } public void setSelectedProduct(Integer p){ selectedProduct = p; } public List<SelectItem> getManufacturers(){ if(manufacturers == null){ SelectItem option; plans = new ArrayList<SelectItem>(); QueryUtil qu = new QueryUtil(); Map<Integer, String> manufacturersMap = qu.getManufacturers(); for(Map.Entry<Integer, String> entry : manufacturersMap.entrySet()){ option = new SelectItem(entry.getKey(),entry.getValue()); manufacturers.add(option); } } return manufacturers; } public void setManufacturers(List<SelectItem> l){ manufacturers = l; } public List<SelectItem> getProducts(){ if(products == null){ SelectItem option; products = new ArrayList<SelectItem>(); if(selectedPlan != null){ PMTQueryUtil pqu = new PMTQueryUtil(); Map<Integer, String> productsMap = pqu.getProducts(); for(Map.Entry<Integer, String> entry : productsMap.entrySet()){ option = new SelectItem(entry.getKey(),entry.getValue()); products.add(option); } } } return products; } public void setProducts(List<SelectItem> l){ products = l; } } JSP fragment <h:selectOneListbox id="manufacturerList" value="#{ProductsBean.selectedManufacturer}" size="10"> <f:selectItems value="#{ProductsBean.manufacturers}" /> </h:selectOneListbox> <h:selectOneListbox id="productList" value="#{PendingPlansBean.selectedProduct}" size="10"> <f:selectItems binding="#{ProductsBean.products}" /> </h:selectOneListbox>

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  • C# - Repeating a method call using timers

    - by Jeremy Rudd
    In a VSTO add-in I'm developing, I need to execute a method with a specific delay. The tricky part is that the method may take anywhere from 0.1 sec to 1 sec to execute. I'm currently using a System.Timers.Timer like this: private Timer tmrRecalc = new Timer(); // tmrRecalc.Interval = 500 milliseconds private void tmrRecalc_Elapsed(object sender, System.Timers.ElapsedEventArgs e){ // stop the timer, do the task     tmrRecalc.Stop();         Calc.recalcAll();         // restart the timer to repeat after 500 ms     tmrRecalc.Start(); } Which basically starts, raises 1 elapse event after which it is stopped for the arbitrary length task is executed. But the UI thread seems to hang up for 3-5 seconds between each task. Do Timers have a 'warm-up' time to start? Is that why it takes so long for its first (and last) elapse? Which type of timer do I use instead?

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  • Right-click context menu for Java JTree?

    - by arcanex
    I'm trying to implement pop-up menus in Java JTree. I've sub-classed DefaultTreeCellRenderer (to change node appearance) and DefaultTreeCellEditor (to create Components to attach event listeners to, since apparently the Components that DefaultTreeCellRenderer.getTreeCellRendererComponent() returns can't do it?). I don't really want to "edit" the nodes, just be able to pop-up a menu when a node gets right-clicked, but this is the only way I can think of doing it right now... Below is the code that I have so far-- I'm just trying to figure out how to capture MouseEvents. It sort of works, but badly. What's a better way to accomplish what I'm trying to do here? private class My_TreeCellRenderer extends DefaultTreeCellRenderer { My_TreeCellRenderer() { super (); } public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus); // set label text and tool tips setText(((My_Object)value).getTreeLabel()); setToolTipText(((My_Object)value).getTreeToolTip()); return this; } } private class My_TreeCellEditor extends DefaultTreeCellEditor { private MouseAdapter ma; My_TreeCellEditor(JTree tree, DefaultTreeCellRenderer renderer) { super (tree, renderer); ma = new MouseAdapter() { public void mousePressed(MouseEvent e) { if (e.isPopupTrigger()) { System.out.println("My Popup"); } } public void mouseReleased(MouseEvent e) { if (e.isPopupTrigger()) { System.out.println("My Popup"); } } }; } public Component getTreeCellEditorComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row) { String src_filename = null; // return non-editing component Component c = renderer.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, true); // add mouse listener if it's not listening already MouseListener mouseListeners[] = c.getMouseListeners(); int i; for (i=0; i < mouseListeners.length && mouseListeners[i] != ma; i++); if (i >= mouseListeners.length) c.addMouseListener(ma); return c; } protected boolean canEditImmediately(EventObject event) { if (event instanceof MouseEvent && ((MouseEvent)event).getClickCount() == 1) return true; else return false; } }

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  • JPA 2 and Hibernate 3.5.1 MEMBER OF query doesnt work.

    - by Ed_Zero
    I'm trying the following JPQL and it fails misserably: Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' MEMBER OF u.roles"); List users = query.query.getResultList(); I get the following exception: ERROR [main] PARSER.error(454) | <AST>:0:0: unexpected end of subtree java.lang.IllegalArgumentException: org.hibernate.hql.ast.QuerySyntaxException: unexpected end of subtree [SELECT u FROM com.online.data.User u WHERE 'admin' MEMBER OF u.roles] ERROR [main] PARSER.error(454) | <AST>:0:0: expecting "from", found '<ASTNULL>' ... ... Caused by: org.hibernate.hql.ast.QuerySyntaxException: unexpected end of subtree [SELECT u FROM com.online.data.User u WHERE 'admin' MEMBER OF u.roles] I have Spring 3.0.1.RELEASE, Hibernate 3.5.1-Final and maven to glue dependencies. User class: @Entity public class User { @Id @Column(name = "USER_ID") @GeneratedValue(strategy = GenerationType.IDENTITY) private long id; @Column(unique = true, nullable = false) private String username; private boolean enabled; @ElementCollection private Set<String> roles = new HashSet<String>(); ... } Spring configuration: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/tx/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <!-- Reading annotation driven configuration --> <tx:annotation-driven transaction-manager="transactionManager" /> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" /> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="maxActive" value="100" /> <property name="maxWait" value="1000" /> <property name="poolPreparedStatements" value="true" /> <property name="defaultAutoCommit" value="true" /> </bean> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> <property name="dataSource" ref="dataSource" /> </bean> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="showSql" value="true" /> <property name="databasePlatform" value="${hibernate.dialect}" /> </bean> </property> <property name="loadTimeWeaver"> <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" /> </property> <property name="jpaProperties"> <props> <prop key="hibernate.hbm2ddl.auto">update</prop> <prop key="hibernate.current_session_context_class">thread</prop> <prop key="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">false</prop> <prop key="hibernate.show_comments">true</prop> </props> </property> <property name="persistenceUnitName" value="punit" /> </bean> <bean id="JpaTemplate" class="org.springframework.orm.jpa.JpaTemplate"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> </beans> Persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence"> <persistence-unit name="punit" transaction-type="RESOURCE_LOCAL" /> </persistence> pom.xml maven dependencies. <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate</artifactId> <version>${hibernate.version}</version> <type>pom</type> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-annotations</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> <type>jar</type> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-taglibs</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-acl</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.annotation</groupId> <artifactId>jsr250-api</artifactId> <version>1.0</version> </dependency> <properties> <!-- Application settings --> <spring.version>3.0.1.RELEASE</spring.version> <hibernate.version>3.5.1-Final</hibernate.version> Im running a unit test to check the configuration and I am able to run other JPQL queries the only ones that I am unable to run are the IS EMPTY, MEMBER OF conditions. The complete unit test is as follows: TestIntegration @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "/spring/dataLayer.xml"}) @Transactional @TransactionConfiguration public class TestUserDaoImplIntegration { @PersistenceContext private EntityManager em; @Test public void shouldTest() throws Exception { try { //WORKS Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' in elements(u.roles)"); List users = query.query.getResultList(); //DOES NOT WORK } catch (Exception e) { e.printStackTrace(); throw e; } try { Query query = em.createQuery("SELECT u FROM User u WHERE 'admin' MEMBER OF u.roles"); List users = query.query.getResultList(); } catch (Exception e) { e.printStackTrace(); throw e; } } }

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  • chat application: pubsubhub vs xmpp

    - by sofia
    I'm unsure on the best stack to build a chat application. Currently I'm thinking of two main options: facebook tornado cons: does not use the main chat protocol xmpp but pubsubhubbub pros: i really like its simplicity for development (webserver + webframework); pubsubhubbub also seems simpler as a protocol than xmpp; and i know python xmpp + bosch, punjab, ejabberd cons: don't know erlang; overall seems a bit harder to develop pros: uses xmpp protocol The chat app will need to have the following: Private messages Public rooms Private rooms Chat history for rooms (not forever, just the last n messages) html embedding url to chat room Both options seem scalable so that's not really my worry (we're thinking of running the app in amazon's ec2 as well). I know there's a project that builds a xmpp server using tornado but it's not ready for production use and our deadline isn't that big. Basically my main worry is ease of development vs somehow regretting later using pubsubhubbub to develop a chat app but I read somewhere that PubSubHubbub might eventually replace XMPP as REST replaced SOAP - so what do you think?

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  • SQLite file locking and DropBox

    - by Alex Jenter
    I'm developing an app in Visual C++ that uses an SQLite3 DB for storing data. Usually it sits in the tray most of the time. I also would like to enable putting my app in a DropBox folder to share it across several PCs. It worked really well up until DropBox has recently updated itself. And now it says that it "can't sync the file in use". The SQLite file is open in my app, but the lock is shared. There are some prepared statements, but all are reset immediately after using step. Is there any way to enable synchronizing of an open SQLite database file? Thanks! Here is the simple wrapper that I use just for testing (no error handling), in case this helps: class Statement { private: Statement(sqlite3* db, const std::wstring& sql) : db(db) { sqlite3_prepare16_v2(db, sql.c_str(), sql.length() * sizeof(wchar_t), &stmt, NULL); } public: ~Statement() { sqlite3_finalize(stmt); } public: void reset() { sqlite3_reset(stmt); } int step() { return sqlite3_step(stmt); } int getInt(int i) const { return sqlite3_column_int(stmt, i); } tstring getText(int i) const { const wchar_t* v = (const wchar_t*)sqlite3_column_text16(stmt, i); int sz = sqlite3_column_bytes16(stmt, i) / sizeof(wchar_t); return std::wstring(v, v + sz); } private: friend class Database; sqlite3* db; sqlite3_stmt* stmt; }; class Database { public: Database(const std::wstring& filename = L"")) : db(NULL) { sqlite3_open16(filename.c_str(), &db); } ~Database() { sqlite3_close(db); } void exec(const std::wstring& sql) { auto_ptr<Statement> st(prepare(sql)); st->step(); } auto_ptr<Statement> prepare(const tstring& sql) const { return auto_ptr<Statement>(new Statement(db, sql)); } private: sqlite3* db; };

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  • Managing database connections in an Android Activity

    - by Daniel Lew
    I have an application with a ListActivity that uses a CursorAdapter as its adapter. The ListActivity opens the database and does the querying for the CursorAdapter, which is all well and good, but I am having issues with figuring out when to close both the Cursor and the SQLiteDatabase. The way things are handled right now, if the user finishes the activity, I close the database and the cursor. However, this still ends up with the DalvikVM warning me that I've left a database open - for example, if the user hits the "home" button (leaving the activity in the task's stack), rather than the "back" button. If I close them during pause and then re-query during resume, then I don't get any errors, but then a user cannot return to the list without it requerying (and thus losing the user's place in the list). By this I mean, the user can click on any item in the list and open a new activity based on it, but will often want to hit "back" afterwards and return to the same place on the list. If I requery, then I cannot return the user back to the correct spot. What is the proper way to handle this issue? I want the list to remain scrolled properly, but I don't want the VM to keep complaining about unclosed databases. Edit: Here's a general outline of how I handle the code at the moment: public class MyListActivity extends ListActivity { private Cursor mCursor; private CursorAdapter mAdapter; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAdapter = new MyCursorAdapter(this); setListAdapter(mAdapter); } protected void onPause() { super.onPause(); if (isFinishing()) { mCursor.close(); } } protected void onDestroy() { super.onDestroy(); mCursor.close(); } private void updateQuery() { // If we had a cursor open before, close it. if (mCursor != null) { mCursor.close(); } MyDbHelper dbHelper = new MyDbHelper(this); SQLiteDatabase db = dbHelper.getReadableDatabase(); mCursor = db.query(...); mAdapter.changeCursor(mCursor); db.close(); } } updateQuery() can be called multiple times because the user can filter the results via menu items (I left this part out of the code, as the problem still occurs even if the user does no filtering). Again, the issue is that when I hit home I get leak errors. Yet, after going home, I can go back to the app and find my list again - cursor fully intact.

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  • Security failure - This is not a secure document but has security embed parameters

    - by dimitris mistriotis
    I try to create a private version and therefore I used something like this in php: var scribd_doc = scribd.Document.getDoc( 28394353, 'xxx'); scribd_doc.addParam("use_ssl", true); scribd_doc.addParam('public', false); scribd_doc.grantAccess("cbccf6e7-1ff7-9034-8a7c-a0c2a5b225ed", <?php echo "'" . trim($_COOKIE['PHPSESSID']) . "'" ?>, <?php echo "'" . scribd_calculate_signature($documentID = '28394353', $sessionID = trim($_COOKIE['PHPSESSID']), $userID = "cbccf6e7-1ff7-9034-8a7c-a0c2a5b225ed") . "'" ?>); ... ... scribd_doc.write( 'embedded_flash' ); Which is the api of scribd for javascript with the addition of the signature. My result is the "Security failure - This is not a secure document but has security embed parameters" Error, which is not well documented. The document is set to private. Any ideas?

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  • Binding collection indexes to a WPF DataGrid at runtime

    - by bearda
    After trying to develop our own control to display a table of data we stumbled on the WPF toolkit DataGrid and thought we were saved. A couple hours later I'm scratching my head trying to figure out if it can do what we really want it to do. The DataGrid seems to be based on displaying various properties of a single object, where I think I need something that can display a collection's items, I want to display a table of strings with a variable number of rows and a variable number of columns. Each row represents the state of a number of inputs at a given time. The number of samples may change, and the number of inputs may change at runtime. As a result, I can't create a custom object that represents a row with a property for each input. This makes the DataGrid binding more complicated, since I can't bind to a fixed property for each column. I thought I found a workaround for this by binding to ".[" + channelIndex + ]" but it hasn't worked out quite the way I wanted. Right now I have a collection of a collection of strings that represents the two-dimensional array of strings. I'm using ObservableCollection so string change event notifications work, but I can use any collection type needed. It looked like everything was working great until I realized that every row was showing the same line of data. Binding in C# is not my strong suit, so I'm kind of lost on what's going wrong. Is what I'm trying to do overall even possible with the WPF Toolkit DataGrid? using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using Microsoft.Windows.Controls; using System.ComponentModel; using System.Collections; using System.Collections.ObjectModel; namespace WRE.NGDAS.UILayer { /// <summary> /// Interaction logic for DataTableControl.xaml /// </summary> public partial class DataTableControl : UserControl { #region Constants private const int lineHeight = 25; #endregion #region Type Definitions private class TableChannelInfo { internal string ChannelName = string.Empty; internal int Column = 0; public override string ToString() { return ChannelName; } } internal class NotifyString : INotifyPropertyChanged { private string text = String.Empty; public event PropertyChangedEventHandler PropertyChanged; public string Text { get { return text; } set { text = value; NotifyPropertyChanged( "Text" ); } } public NotifyString(string newText) { text = newText; } protected void NotifyPropertyChanged( string propertyChanged ) { if ( PropertyChanged != null ) { PropertyChanged(this, new PropertyChangedEventArgs(propertyChanged)); } } } #endregion #region Private Data Members string[] channels = null; int numberFixed = 0; int numberOfRows = 0; ObservableCollection<ObservableCollection<NotifyString>> tableText = null; #endregion public DataTableControl( List<string> channelNames, List<string> nameToolTips, int numberFixedColumns, int numberRows ) { InitializeComponent(); numberFixed = numberFixedColumns; numberOfRows = numberRows; tableText = new ObservableCollection<ObservableCollection<NotifyString>>(); dataGrid.ItemsSource = tableText; channels = new string[channelNames.Count]; for (int channelIndex = 0; channelIndex < channelNames.Count; channelIndex++) { channels[channelIndex] = channelNames[channelIndex]; tableText.Add(new ObservableCollection<NotifyString>()); for (int i = 0; i < numberOfRows; i++) { tableText[channelIndex].Add( new NotifyString(String.Empty) ); } Binding textBinding = new Binding( ".[" + channelIndex + "]" ); textBinding.Mode = BindingMode.OneWay; textBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged; textBinding.Source = tableText[channelIndex]; DataGridTextColumn newColumn = new DataGridTextColumn(); newColumn.Header = channelNames[channelIndex]; newColumn.DisplayIndex = channelIndex; newColumn.Binding = textBinding; if ( channelIndex < numberFixed ) { newColumn.CanUserReorder = false; } dataGrid.Columns.Add(newColumn); } //Height = lineHeight + numberOfRows * lineHeight; } internal void UpdateChannelRow( int rowNumber, List<string> channelValues, DisplayColors color ) { if ( rowNumber < numberOfRows ) { for (int column = 0; column < channelValues.Count; column++) { if ( column < channels.GetLength(0) ) { tableText[column][rowNumber].Text = channelValues[column]; } } } } } }

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  • Implicit casting in VB.NET

    - by Shimmy
    The question is intended for lazy VB programmers. Please. In vb I can do and I won't get any errors. Example 1 Dim x As String = 5 Dim y As Integer = "5" Dim b As Boolean = "True" Example 2 Dim a As EnumType = 4 Dim v As Integer = EnumType.EnumValue Example 3 Private Sub ButtonClick(sender As Object, e As EventArgs) Dim btn As Button = sender End Sub Example 4 Private Sub ButtonClick(sender As Button, e As EventArgs) Dim data As Contact = sender.Tag End Sub If I surely know the expected runtime type, is this 'forbidden' to rely on the vb-language built-in casting? When can I rely? Thanks

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  • Interfacing Android Nexus One with Arduino + BlueSmirf

    - by efgomez
    I'm a bit new to all of this, so bear with me - I'd really appreciate your help. I am trying to link the Android Nexus One with an arduino (Duemilanove) that is connected to a BlueSmirf. I have a program that is simply outputting the string "Hello Bluetooth" to whatever device the BlueSmirf is connected to. Here is the Arduino program: void setup(){ Serial.begin(115200); int i; } void loop(){Serial.print("Hello Bluetooth!"); delay(1000); } One my computer BT terminal I can see the message and connect no problem. The trouble is with my android code. I can connect to the device with android, but when I look at the log it is not displaying "Hello Bluetooth". Here is the debug log: 04-09 16:27:49.022: ERROR/BTArduino(17288): FireFly-2583 connected 04-09 16:27:49.022: ERROR/BTArduino(17288): STARTING TO CONNECT THE SOCKET 04-09 16:27:55.705: ERROR/BTArduino(17288): Received: 16 04-09 16:27:56.702: ERROR/BTArduino(17288): Received: 1 04-09 16:27:56.712: ERROR/BTArduino(17288): Received: 15 04-09 16:27:57.702: ERROR/BTArduino(17288): Received: 1 04-09 16:27:57.702: ERROR/BTArduino(17288): Received: 15 04-09 16:27:58.704: ERROR/BTArduino(17288): Received: 1 04-09 16:27:58.704: ERROR/BTArduino(17288): Received: 15 ect... Here is the code, I'm trying to put only the relative code but if you need more please let me know: private class ConnectThread extends Thread { private final BluetoothSocket mySocket; private final BluetoothDevice myDevice; public ConnectThread(BluetoothDevice device) { myDevice = device; BluetoothSocket tmp = null; try { tmp = device.createRfcommSocketToServiceRecord(MY_UUID); } catch (IOException e) { Log.e(TAG, "CONNECTION IN THREAD DIDNT WORK"); } mySocket = tmp; } public void run() { Log.e(TAG, "STARTING TO CONNECT THE SOCKET"); InputStream inStream = null; boolean run = false; //...More Connection code here... The more relative code is here: byte[] buffer = new byte[1024]; int bytes; // handle Connection try { inStream = mySocket.getInputStream(); while (run) { try { bytes = inStream.read(buffer); Log.e(TAG, "Received: " + bytes); } catch (IOException e3) { Log.e(TAG, "disconnected"); } } I am reading bytes = inStream.read(buffer). I know bytes is an integer, so I tried sending integers over bluetooth because "bytes" was an integer but it still didn't make sense. It almost appears that is sending incorrect baud rate. Could this be true? Any help would be appreciated. Thank you very much.

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  • How to use Bouncy Castle lightweight API with AES and PBE

    - by Adrian
    I have a block of ciphertext that was created using the JCE algorithim "PBEWithSHA256And256BitAES-CBC-BC". The provider is BouncyCastle. What I'd like to do it decrypt this ciphertext using the BouncyCastle lightweight API. I don't want to use JCE because that requires installing the Unlimited Strength Jurisdiction Policy Files. Documentation seems to be thin on the ground when it comes to using BC with PBE and AES. Here's what I have so far. The decryption code runs without exception but returns rubbish. The encryption code, String password = "qwerty"; String plainText = "hello world"; byte[] salt = generateSalt(); byte[] cipherText = encrypt(plainText, password.toCharArray(), salt); private static byte[] generateSalt() throws NoSuchAlgorithmException { byte salt[] = new byte[8]; SecureRandom saltGen = SecureRandom.getInstance("SHA1PRNG"); saltGen.nextBytes(salt); return salt; } private static byte[] encrypt(String plainText, char[] password, byte[] salt) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException { Security.addProvider(new BouncyCastleProvider()); PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 20); PBEKeySpec pbeKeySpec = new PBEKeySpec(password); SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithSHA256And256BitAES-CBC-BC"); SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec); Cipher encryptionCipher = Cipher.getInstance("PBEWithSHA256And256BitAES-CBC-BC"); encryptionCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec); return encryptionCipher.doFinal(plainText.getBytes()); } The decryption code, byte[] decryptedText = decrypt(cipherText, password.getBytes(), salt); private static byte[] decrypt(byte[] cipherText, byte[] password, byte[] salt) throws DataLengthException, IllegalStateException, InvalidCipherTextException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException { BlockCipher engine = new AESEngine(); CBCBlockCipher cipher = new CBCBlockCipher(engine); PKCS5S1ParametersGenerator keyGenerator = new PKCS5S1ParametersGenerator(new SHA256Digest()); keyGenerator.init(password, salt, 20); CipherParameters keyParams = keyGenerator.generateDerivedParameters(256); cipher.init(false, keyParams); byte[] decryptedBytes = new byte[cipherText.length]; int numBytesCopied = cipher.processBlock(cipherText, 0, decryptedBytes, 0); return decryptedBytes; }

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  • Initializing a property in c#

    - by Shonna
    I have a constructor I am trying to build with the header public KsuPoint(double x0, double y0) now i also have properties in the class as shown below private double x; public double X { get { return x; } } private double y; public double Y { get { return y; } } This constructor is suppose to initialize the properties X and Y ... is this correct? or am i off? public KsuPoint(double x0, double y0) { new KsuPoint(x0, y0); }

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  • Using Monitor Class

    - by Mubashar Ahmad
    Dear All I would like to ask couple of Questions regarding the use of Monitor Class in .Net. To understand the Questions please look at the following Code. public class MyClass { private List<int> _MyCollection = new List<int>(); public void GetLock() { Monitor.Enter(_MyCollection); } public void ReleaseLock() { Monitor.Exit(_MyCollection); } public void UpdateCollection(/*anyparam*/) { //update collection without lock on collection } } public class MyAppMain { private static MyClass myclass = new MyClass(); public static void main(args) { try { myclass.GetLock(); //an operation that does not do any update on myclass but wanted //to ensure that the collection within myclass never update //while its doing following opetion //Do somthing } finally { myclass.ReleaseLock(); } } } Now is this the right use of monitor and do i need to use Pulse or PulseAll to signal waiting thread and if so than should use plus before or after Exit function? Regards Mubashar

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  • Webbrowser control: auto fill, only works one time, why?

    - by Khou
    The following code loads a page and auto fills in the values. private void button1_Click(object sender, EventArgs e) { //Load page and autofill webBrowser1.Navigate("http://exampledomain.com"); webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(autoFillDetails); // etc...etc.. } private void autoFillDetails(object sender, WebBrowserDocumentCompletedEventArgs e) { // do auto fill values ((WebBrowser)sender).Document.GetElementById("MY_NAME").SetAttribute("value", "theMynamevalue"); // etc...etc... } Autofill only work one time! After the form has been submitted, and you navigate back to the page previous form page (even when you click the button again), it will no longer auto fill the form values! Note: The the "autoFillDetails" code is executed a second time, 3rd time etc, it still would not auto fill the values. why does it only work one time? what am i doing wrong?

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  • Objective-C runtime reflection (objc_msgSend): does it violate the iPhone Developer License Agreemen

    - by GamingHorror
    Does code like this (potentially) violate the iPhone Developer License Agreement? Class clazz = NSClassFromString(@"WNEntity"); id entity = [clazz entityWithImage:@"Icon.png"]; SEL setPositionSelector = NSSelectorFromString(@"setPosition:"); objc_msgSend(entity, setPositionSelector, CGPointMake(200, 100)); I'm working on code that dynamically allocates classes from XML and calls methods on them via objc_msgSend. It's just very convenient constructing my objects that way but it worries me because i have no idea whether this is ok or violates the License by dynamically executing code or maybe even calling private (?) API functions. They wouldn't be documented if they were private, right? Can someone shed some light on this? Have you had an App approved or rejected using code similar to the above? I'm pretty sure that this is ok but i wan't to hear it from someone else! :)

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