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  • How to focus a control in an MDIParent when all child windows have closed?

    - by Tim Gradwell
    I have a control in my parent mdi form which I wish to be given the focus if all mdi children have closed. I've tried hooking into the child form's FormClosed event and setting the focus from there but when I test it, my control is not left with focus when I close the mdi child. Can anyone tell me what I'm missing? In the sample below, "first focus" gets hit and does its job correctly (if I comment out the first focus line, my tree does not get focus on startup, so it must be doing its job, right?) Unfortunately, even though "second focus" gets hit, my tree does not end up with the focus when I close the child window. Sample using System; using System.Windows.Forms; namespace mdiFocus { class ParentForm : Form { public ParentForm() { IsMdiContainer = true; tree = new TreeView(); tree.Nodes.Add("SomeNode"); tree.Dock = DockStyle.Left; Controls.Add(tree); } protected override void OnShown(EventArgs e) { Form child = new Form(); child.MdiParent = this; child.Show(); child.FormClosed += new FormClosedEventHandler(child_FormClosed); tree.Focus(); // first focus works ok } void child_FormClosed(object sender, FormClosedEventArgs e) { tree.Focus(); // second focus doesn't seem to work, even though it is hit :( } TreeView tree; } static class Program { [STAThread] static void Main() { Application.Run(new ParentForm()); } } }

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  • How to limit Access-Control-Allow-Origin to a specific path?

    - by coderama
    I have a website that servies ads via javascript. So, I basically allow the user to include my script.... : <script src="http://www.example.com/ads.js" ></script> <script> MYADDS.insertAdvert(); </script> The problem is, I kept getting: "No Access-Control-Allow-Origin" Errors. That was until I added this to my htaccess file: <IfModule mod_headers.c> Header set Access-Control-Allow-Origin "*" </IfModule> Problem is, this opens up my entire site and is probably a security risk. So, seeing as the ads.js file actually only does an ajax request to: http://www.example.com/place/where/my/adds/are/fed/from How can I make the above htaccess rule only apply to that path? Keep in mind, it's not an actualy directory, so I can't put the htaccess file in that folder. It's actually a "virtual path". The site is built using Laravel and therefore does the typical laravel path rewriting. Here's teh full htaccess file: <IfModule mod_rewrite.c> <IfModule mod_negotiation.c> Options -MultiViews </IfModule> RewriteEngine On # Redirect Trailing Slashes... RewriteRule ^(.*)/$ /$1 [L,R=301] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php/$1 [L] </IfModule> Any ideas how to do this?

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  • Why doesn't Apache start from xampp control panel after changes to vhosts config?

    - by Grafica
    I'm running xampp on my local server, and want to host multiple sites, so I changed the httpd-vhosts.conf file. Will somebody let me know if there is something wrong with my code? Apache was running while I had only one site in the config, but after I added another site, I stopped apache, and I'm not able to restart it. # # Virtual Hosts # # If you want to maintain multiple domains/hostnames on your # machine you can setup VirtualHost containers for them. Most configurations # use only name-based virtual hosts so the server doesn't need to worry about # IP addresses. This is indicated by the asterisks in the directives below. # # Please see the documentation at # <URL:http://httpd.apache.org/docs/2.2/vhosts/> # for further details before you try to setup virtual hosts. # # You may use the command line option '-S' to verify your virtual host # configuration. # # Use name-based virtual hosting. # ##NameVirtualHost *:80 # # VirtualHost example: # Almost any Apache directive may go into a VirtualHost container. # The first VirtualHost section is used for all requests that do not # match a ServerName or ServerAlias in any <VirtualHost> block. # ##<VirtualHost *:80> ##ServerAdmin [email protected] ##DocumentRoot "C:/xampp/htdocs/dummy-host.localhost" ##ServerName dummy-host.localhost ##ServerAlias www.dummy-host.localhost ##ErrorLog "logs/dummy-host.localhost-error.log" ##CustomLog "logs/dummy-host.localhost-access.log" combined ##</VirtualHost> ##<VirtualHost *:80> ##ServerAdmin [email protected] ##DocumentRoot "C:/xampp/htdocs/dummy-host2.localhost" ##ServerName dummy-host2.localhost ##ServerAlias www.dummy-host2.localhost ##ErrorLog "logs/dummy-host2.localhost-error.log" ##CustomLog "logs/dummy-host2.localhost-access.log" combined ##</VirtualHost> NameVirtualHost * <VirtualHost *> DocumentRoot "C:\xampp\htdocs" ServerName localhost </VirtualHost> <VirtualHost *> DocumentRoot "C:\xampp\htdocs" ServerName evamagnus.com <Directory "C:\xampp\htdocs\"> Order allow,deny Allow from all </Directory> </VirtualHost> <VirtualHost *> DocumentRoot "C:\xampp\htdocs2\" ServerName mygrafica.com <Directory "C:\xampp\htdocs2\"> Order allow,deny Allow from all </Directory> </VirtualHost> Here is what it says in the control panel: 2:17:37 PM [apache] Starting apache service... 2:17:38 PM [apache] Status change detected: running 2:17:39 PM [apache] Status change detected: stopped Thanks in advance.

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  • keybinding issues with xmodmap across synergy

    - by Rick
    I've got two systems I use across Synergy. On the main one I have a normal keyboard that I swap caps lock and ctrl for. So I do: xmodmap -e 'keycode 66 = Control_L' xmodmap -e 'clear lock' xmodmap -e 'add Control = Control_L' Where keycode 66 is my caps lock key. The trouble is that I can't get this key to act as a control key on the other machine I connect to with synergy. The strange thing is that if I plug a keyboard into the machine, and run xev, the control key there is keycode 37. When I then hit my modified control key (keycode 66 on the master) it's registering as keycode 37 on the remote machine. So according to xev, it should be picking it up as a control keypress. Anyone have any hints on if Synergy is doing something overly helpful for me?

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  • SJS AS 9.1 U2 (GF v2 U2) - Patch 25 // GF v2.1 - Patch 19 // Sun GlassFish Enterprise Server v2.1.1 Patch 13

    - by arungupta
    SJS AS 9.1 U2 (GF v2 U2) patch 25 is a commercial (Restricted) patch (see Overview of GFv2) available as part of Oracle's Commercial Support for GlassFish. This release is also patch 19 of GlassFish 2.1 and patch 13 of GlassFish 2.1.1. The file-based patches were released onSep 1, 2011; package-based patches were released on Sep 13, 2011. Release Overview Description SJS AS 9.1 U2 (GFv2 U2) - Patch 25 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. GlassFish 2.1 - Patch 19 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. GlassFish 2.1.1 - Patch 13 - File and Package-Based Patch for Solaris SPARC, Solaris x86, Linux, Windows and AIX. Patch Ids This release comes in 3 different variants: Package-based patches with HADB • Solaris SPARC - [128640-27] • Solarix i586 - [128641-27] • Linux RPM - [128642-27] File-based patches with HADB • Solaris SPARC - [128643-27] • Solaris i586 - [128644-27] • Linux - [128645-27] • Windows - [128646-27] File based patches without HADB • Solaris SPARC - [128647-27] • Solaris i586 - [128648-27] • Linux - [128649-27] • Windows - [128650-27] • AIX - [137916-27] Update Date Nov 23, 2011 Comment Commercial (for-fee) release with regular bug fixes. This is patch 25 for SJS AS 9.1 U2; it is also patch 19 for GlassFish v2.1 and patch 13 for GlassFish v2.1.1. It contains the fixes from the previous patches plus fixes for 18 unique defects. Status CURRENT Bugs Fixed in this Patch: • [12823919]: RESPONSE BYTECHUNK FLUSH WILL GENERATE A MIMEHEADER WHEN SESSION REPLICATION ON • [12818767]: INTEGRATE NEW GRIZZLY 1.0.40 • [12807660]: BUILD, STAGE AND INTEGRATING HADB • [12807643]: INTEGRATE MQ 4.4 U2 P4 • [12802648]: GLASSFISH BUILD FAILED DUE TO METRO INTEGRATION • [12799002]: JNDI RESOURCE NOT ENABLED IF TARGETTING USING ADMIN GUI ON GF 2.1.1 PATCH 11 • [12794672]: ORG.APACHE.JASPER.RUNTIME.BODYCONTENTIMPL DOES NOT COMPACT CB BUFFER • [12772029]: BUG 12308270 - NEED HOTFIX FROM GF RUNNING OPENSSO • [12749346]: VERSION CHANGES FOR GLASSFISH V2.1.1 PATCH 13 • [12749151]: INTEGRATING METRO 1.6.1-B01 INTO GF 2.1.1 P13 • [12719221]: PORTUNIFICATION WSTCPPROTOCOLFINDER.FIND NULLPOINTEREXCEPTION THROWN • [12695620]: HADB: LOGBUFFERSIZE CALCULATED INCORRECTLY FOR VALUES 120 MB AND THE MEMORY FO • [12687345]: ENVIRONMENT VARIABLE PARSING FOR SUN_APPSVR_NOBACKUP CAN FAIL DEPENDING ENV VARS • [12547651]: GLASSFISH DISPLAY BUG • [12359965]: GEREQUESTURI RETURNS URI WITH NULL PREPENDED INTERMITTENT AFTER UPGRADE • [12308270]: SUNBT7020210 ENHANCE JAXRPC SOAP RESPONSE USE PREVIOUS CONFIGURED NAMESPACE PREF • [12308003]: SUNBT7018895 FAILURE TO DEPLOY OR RUN WEBSERVICE AFTER UPDATING TO GF 2.1.1 P07 • [12246256]: SUNBT6739013 [RN]GLASSFISH/SUN APPLICATION INSTALLER CRASHES ON LINUX Additional Notes: More details about these bugs can be found at My Oracle Support.

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  • Slicing the EDG

    - by Antony Reynolds
    Different SOA Domain Configurations In this blog entry I would like to introduce three different configurations for a SOA environment.  I have omitted load balancers and OTD/OHS as they introduce a whole new round of discussion.  For each possible deployment architecture I have identified some of the advantages. Super Domain This is a single EDG style domain for everything needed for SOA/OSB.   It extends the standard EDG slightly but otherwise assumes a single “super” domain. This is basically the SOA EDG.  I have broken out JMS servers and Coherence servers to improve scalability and reduce dependencies. Key Points Separate JMS allows those servers to be kept up separately from rest of SOA Domain, allowing JMS clients to post messages even if rest of domain is unavailable. JMS servers are only used to host application specific JMS destinations, SOA/OSB JMS destinations remain in relevant SOA/OSB managed servers. Separate Coherence servers allow OSB cache to be offloaded from OSB servers. Use of Coherence by other components as a shared infrastructure data grid service. Coherence cluster may be managed by WLS but more likely run as a standalone Coherence cluster. Benefits Single Administration Point (1 Admin Server) Closely follows EDG with addition of application specific JMS servers and standalone Coherence servers for OSB caching and application specific caches. Coherence grid can be scaled independent of OSB/SOA. JMS queues provide for inter-application communication. Drawbacks Patching is an all or nothing affair. Startup time for SOA may be slow if large number of composites deployed. Multiple Domains This extends the EDG into multiple domains, allowing separate management and update of these domains.  I see this type of configuration quite often with customers, although some don't have OWSM, others don't have separate Coherence etc. SOA & BAM are kept in the same domain as little benefit is obtained by separating them. Key Points Separate JMS allows those servers to be kept up separately from rest of SOA Domain, allowing JMS clients to post messages even if other domains are unavailable. JMS servers are only used to host application specific JMS destinations, SOA/OSB JMS destinations remain in relevant SOA/OSB managed servers. Separate Coherence servers allow OSB cache to be offloaded from OSB servers. Use of Coherence by other components as a shared infrastructure data grid service. Coherence cluster may be managed by WLS but more likely run as a standalone Coherence cluster. Benefits Follows EDG but in separate domains and with addition of application specific JMS servers and standalone Coherence servers for OSB caching and application specific caches. Coherence grid can be scaled independent of OSB/SOA. JMS queues provide for inter-application communication. Patch lifecycle of OSB/SOA/JMS are no longer lock stepped. JMS may be kept running independently of other domains allowing applications to insert messages fro later consumption by SOA/OSB. OSB may be kept running independent of other domains, allowing service virtualization to continue independent of other domains availability. All domains use same OWSM policy store (MDS-WSM). Drawbacks Multiple domains to manage and configure. Multiple Admin servers (single view requires use of Grid Control) Multiple Admin servers/WSM clusters waste resources. Additional homes needed to enjoy benefits of separate patching. Cross domain trust needs setting up to simplify cross domain interactions. Startup time for SOA may be slow if large number of composites deployed. Shared Service Environment This model extends the previous multiple domain arrangement to provide a true shared service environment.This extends the previous model by allowing multiple additional SOA domains and/or other domains to take advantage of the shared services.  Only one non-shared domain is shown, but there could be multiple, allowing groups of applications to share patching independent of other application groups. Key Points Separate JMS allows those servers to be kept up separately from rest of SOA Domain, allowing JMS clients to post messages even if other domains are unavailable. JMS servers are only used to host application specific JMS destinations, SOA/OSB JMS destinations remain in relevant SOA/OSB managed servers. Separate Coherence servers allow OSB cache to be offloaded from OSB servers. Use of Coherence by other components as a shared infrastructure data grid service Coherence cluster may be managed by WLS but more likely run as a standalone Coherence cluster. Shared SOA Domain hosts Human Workflow Tasks BAM Common "utility" composites Single OSB domain provides "Enterprise Service Bus" All domains use same OWSM policy store (MDS-WSM) Benefits Follows EDG but in separate domains and with addition of application specific JMS servers and standalone Coherence servers for OSB caching and application specific caches. Coherence grid can be scaled independent of OSB/SOA. JMS queues provide for inter-application communication. Patch lifecycle of OSB/SOA/JMS are no longer lock stepped. JMS may be kept running independently of other domains allowing applications to insert messages fro later consumption by SOA/OSB. OSB may be kept running independent of other domains, allowing service virtualization to continue independent of other domains availability. All domains use same OWSM policy store (MDS-WSM). Supports large numbers of deployed composites in multiple domains. Single URL for Human Workflow end users. Single URL for BAM end users. Drawbacks Multiple domains to manage and configure. Multiple Admin servers (single view requires use of Grid Control) Multiple Admin servers/WSM clusters waste resources. Additional homes needed to enjoy benefits of separate patching. Cross domain trust needs setting up to simplify cross domain interactions. Human Workflow needs to be specially configured to point to shared services domain. Summary The alternatives in this blog allow for patching to have different impacts, depending on the model chosen.  Each organization must decide the tradeoffs for itself.  One extreme is to go for the shared services model and have one domain per SOA application.  This requires a lot of administration of the multiple domains.  The other extreme is to have a single super domain.  This makes the entire enterprise susceptible to an outage at the same time due to patching or other domain level changes.  Hopefully this blog will help your organization choose the right model for you.

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  • Gridpanel auto resize on window resize

    - by imnotneo
    I'm using the array-grid extjs example to try and fit a gridpanel into a container window. The problem is on resizing the container window, the gridpanel doesn't automatically fit the new size. As I understand it that's how it's supposed to work. Here's the link to the example: http://www.extjs.com/deploy/dev/examples/grid/array-grid.html What I've done is changed the following.. // Added to gridpanel config layout: 'fit', viewConfig: { forceFit: true } // Window container var gridWindow = new Ext.Window({ items: [ grid ] }); // Instead of grid.render, use gridWindow.show(); gridWindow.show();

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  • WPF ComboBox Binding breaks when using ControlTemplate

    - by Mitch
    I have a WPF ComboBox that has been working fine until I recently created a ControlTemplate for it to enable me to change the color of the DropDown arrow. The ComboBox still works correctly except the Bound Text value now just shows the name of the Business Object rather than the bound value. I guess that binding like Text="{Binding Path=CaseDateRange}" no longer works when using a ControlTemplate, yet the ItemsSource binding on the dropdown seems to still work fine. Can anyone offer some help with how I need to change my binding when using a ControlTemplate. The code for the ControlTemplate and ComboBox is as follows <ControlTemplate x:Key="ComboBoxControlTemplate1" TargetType="{x:Type ComboBox}"> <Grid x:Name="MainGrid" SnapsToDevicePixels="True"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition MinWidth="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}" Width="0"/> </Grid.ColumnDefinitions> <Popup x:Name="PART_Popup" AllowsTransparency="True" Grid.ColumnSpan="2" IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{DynamicResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom" OpacityMask="#FF2A3D64"> <Microsoft_Windows_Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{Binding ActualWidth, ElementName=MainGrid}"> <Border x:Name="DropDownBorder" BorderBrush="White" BorderThickness="1" CornerRadius="3" Background="{DynamicResource DialogDarkBlue}"> <ScrollViewer x:Name="DropDownScrollViewer" > <Grid RenderOptions.ClearTypeHint="Enabled"> <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0"> <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=DropDownBorder}" Height="{Binding ActualHeight, ElementName=DropDownBorder}" Width="{Binding ActualWidth, ElementName=DropDownBorder}"/> </Canvas> <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </ScrollViewer> </Border> </Microsoft_Windows_Themes:SystemDropShadowChrome> </Popup> <ToggleButton BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" Grid.ColumnSpan="2" IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Foreground="White"> <ToggleButton.Style> <Style TargetType="{x:Type ToggleButton}"> <Setter Property="OverridesDefaultStyle" Value="True"/> <Setter Property="IsTabStop" Value="False"/> <Setter Property="Focusable" Value="False"/> <Setter Property="ClickMode" Value="Press"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" SnapsToDevicePixels="True"> <Grid HorizontalAlignment="Right" Width="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"> <Path x:Name="Arrow" Data="M0,0L3.5,4 7,0z" Fill="White" HorizontalAlignment="Center" Margin="3,1,0,0" VerticalAlignment="Center"/> </Grid> </Microsoft_Windows_Themes:ButtonChrome> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Setter Property="RenderPressed" TargetName="Chrome" Value="True"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Fill" TargetName="Arrow" Value="#FFAFAFAF"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </ToggleButton.Style> </ToggleButton> <ContentPresenter ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}" Content="{TemplateBinding SelectionBoxItem}" ContentStringFormat="{TemplateBinding SelectionBoxItemStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" IsHitTestVisible="False" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="HasDropShadow" SourceName="PART_Popup" Value="True"> <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/> <Setter Property="Color" TargetName="Shdw" Value="#71000000"/> </Trigger> <Trigger Property="HasItems" Value="False"> <Setter Property="Height" TargetName="DropDownBorder" Value="95"/> </Trigger> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/> <Setter Property="Background" Value="#FFF4F4F4"/> </Trigger> <Trigger Property="IsGrouping" Value="True"> <Setter Property="ScrollViewer.CanContentScroll" Value="False"/> </Trigger> <Trigger Property="CanContentScroll" SourceName="DropDownScrollViewer" Value="False"> <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=DropDownScrollViewer}"/> <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=DropDownScrollViewer}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> And the ComboBox is <ComboBox x:Name="cboSelectedCase" Text="{Binding Path=CaseDateRange}" DisplayMemberPath="CaseDateRange" SelectedValuePath="CaseID" Template="{DynamicResource ComboBoxControlTemplate1}" />

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  • Silverlight Chat WrapPanel Crash / Bug

    - by Matt
    I've been given the task to create a simple Silverlight chat box for two people. My control must adhere to the following requirements Scrollable Text must wrap if it's too long When a new item / message is added it must scroll that item into view Now I've successfully made a usercontrol to meet these requirements, but I've run into a possible bug / crash that I can't for the life of me fix. I'm looking for either a fix to the bug, or a different approach to creating a scrollable chat control. Here's the code I've been using. We'll start with my XAML for the chat window <ListBox x:Name="lbChatHistory" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.HorizontalScrollBarVisibility="Disabled" > <ListBox.ItemTemplate> <DataTemplate> <Grid Background="Beige"> <Grid.ColumnDefinitions> <ColumnDefinition Width="70"></ColumnDefinition> <ColumnDefinition Width="Auto"></ColumnDefinition> </Grid.ColumnDefinitions> <TextBlock x:Name="lblPlayer" Foreground="{Binding ForeColor}" Text="{Binding Player}" Grid.Column="0"></TextBlock> <ContentPresenter Grid.Column="1" Width="200" Content="{Binding Message}" /> </Grid> </DataTemplate> </ListBox.ItemTemplate> </ListBox> The idea is to add a new Item to the listbox. The Item (as layed out in the XAML) is a simple 2 column grid. One column for the username, and one column for the message. Now the "items" that I add to the ListBox is a custom class. It has three properties (Player, ForeColor, and Message) that I using binding on within my XAML Player is a string of the current user to display. ForeColor is just a foreground color preference. It helps distinguish the difference between messages. Message is a WrapPanel. I programmatically break the supplied string on the white space for each word. Then for each word, I add a new TextBlock element to the WrapPanel Here is the custom class. public class ChatMessage :DependencyObject, INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public static DependencyProperty PlayerProperty = DependencyProperty.Register( "Player", typeof( string ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnPlayerPropertyChanged ) ) ); public static DependencyProperty MessageProperty = DependencyProperty.Register( "Message", typeof( WrapPanel ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnMessagePropertyChanged ) ) ); public static DependencyProperty ForeColorProperty = DependencyProperty.Register( "ForeColor", typeof( SolidColorBrush ), typeof( ChatMessage ), new PropertyMetadata( new PropertyChangedCallback( OnForeColorPropertyChanged ) ) ); private static void OnForeColorPropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.ForeColor = ( SolidColorBrush ) e.NewValue; } public ChatMessage() { Message = new WrapPanel(); ForeColor = new SolidColorBrush( Colors.White ); } private static void OnMessagePropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.Message = ( WrapPanel ) e.NewValue; } private static void OnPlayerPropertyChanged( DependencyObject d, DependencyPropertyChangedEventArgs e ) { ChatMessage c = d as ChatMessage; c.Player = e.NewValue.ToString(); } public SolidColorBrush ForeColor { get { return ( SolidColorBrush ) GetValue( ForeColorProperty ); } set { SetValue( ForeColorProperty, value ); if(PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs( "ForeColor" )); } } public string Player { get { return ( string ) GetValue( PlayerProperty ); } set { SetValue( PlayerProperty, value ); if ( PropertyChanged != null ) PropertyChanged( this, new PropertyChangedEventArgs( "Player" ) ); } } public WrapPanel Message { get { return ( WrapPanel ) GetValue( MessageProperty ); } set { SetValue( MessageProperty, value ); if ( PropertyChanged != null ) PropertyChanged( this, new PropertyChangedEventArgs( "Message" ) ); } } } Lastly I add my items to the ListBox. Here's the simple method. It takes the above ChatMessage class as a parameter public void AddChatItem( ChatMessage msg ) { lbChatHistory.Items.Add( msg ); lbChatHistory.ScrollIntoView( msg ); } Now I've tested this and it all works. The problem I'm getting is when I use the scroll bar. You can scroll down using the side scroll bar or arrow keys, but when you scroll up Silverlight crashes. FireBug returns a ManagedRuntimeError #4004 with a XamlParseException. I'm soo close to having this control work, I can taste it! Any thoughts on what I should do or change? Is there a better approach than the one I've taken? Thanks in advance. UPDATE I've found an alternative solution using a ScrollViewer and an ItemsControl instead of a ListBox control. For the most part it's stable.

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  • WPF - Binding problem

    - by Erez
    Why after clicking the button the text in the textblock doesn't change ? XAML: <Grid> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBlock Text="{Binding Name}"/> <Button Click="Button_Click" Grid.Row="1" Margin="20">Click Me</Button> </Grid> Code behind: public partial class Window1 : Window, INotifyPropertyChanged { private Person _myPerson; public Person MyPerson { get { return _myPerson; } set { _myPerson = value; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("MyPerson")); } } } public Window1() { MyPerson = new Person { Name = "A" }; DataContext = MyPerson; InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { MyPerson = new Person { Name = "B" }; } #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion }

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  • Databind a datagrid header combobox from ViewModel

    - by Mike
    I've got a Datagrid with a column defined as this: <Custom:DataGridTextColumn HeaderStyle="{StaticResource ComboBoxHeader}" Width="Auto" Header="Type" Binding="{Binding Path=Type}" IsReadOnly="True" /> The ComboBoxHeader style is defined in a resource dictionary as this: <Style x:Key="ComboBoxHeader" TargetType="{x:Type my:DataGridColumnHeader}"> <Setter Property="VerticalContentAlignment" Value="Center"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type my:DataGridColumnHeader}"> <ControlTemplate.Resources> <Storyboard x:Key="ShowFilterControl"> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="filterComboBox" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/> <DiscreteObjectKeyFrame KeyTime="00:00:00.5000000" Value="{x:Static Visibility.Visible}"/> </ObjectAnimationUsingKeyFrames> <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="filterComboBox" Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"> <SplineColorKeyFrame KeyTime="00:00:00" Value="Transparent"/> <SplineColorKeyFrame KeyTime="00:00:00.5000000" Value="White"/> </ColorAnimationUsingKeyFrames> </Storyboard> <Storyboard x:Key="HideFilterControl"> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="filterComboBox" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00.4000000" Value="{x:Static Visibility.Collapsed}"/> </ObjectAnimationUsingKeyFrames> <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="filterComboBox" Storyboard.TargetProperty="(UIElement.OpacityMask).(SolidColorBrush.Color)"> <SplineColorKeyFrame KeyTime="00:00:00" Value="Black"/> <SplineColorKeyFrame KeyTime="00:00:00.4000000" Value="#00000000"/> </ColorAnimationUsingKeyFrames> </Storyboard> </ControlTemplate.Resources> <my:DataGridHeaderBorder x:Name="dataGridHeaderBorder" Margin="0" VerticalAlignment="Top" Height="31" IsClickable="{TemplateBinding CanUserSort}" IsHovered="{TemplateBinding IsMouseOver}" IsPressed="{TemplateBinding IsPressed}" SeparatorBrush="{TemplateBinding SeparatorBrush}" SeparatorVisibility="{TemplateBinding SeparatorVisibility}" SortDirection="{TemplateBinding SortDirection}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.ColumnSpan="1"> <Grid x:Name="grid" Width="Auto" Height="Auto" RenderTransformOrigin="0.5,0.5"> <Grid.RenderTransform> <TransformGroup> <ScaleTransform/> <SkewTransform/> <RotateTransform/> <TranslateTransform/> </TransformGroup> </Grid.RenderTransform> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <ContentPresenter x:Name="contentPresenter" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" ContentStringFormat="{TemplateBinding ContentStringFormat}" ContentTemplate="{TemplateBinding ContentTemplate}"> <ContentPresenter.Content> <MultiBinding Converter="{StaticResource headerConverter}"> <MultiBinding.Bindings> <Binding ElementName="filterComboBox" Path="Text" /> <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Content" /> </MultiBinding.Bindings> </MultiBinding> </ContentPresenter.Content> </ContentPresenter> <ComboBox ItemsSource="{Binding Path=Types}" x:Name="filterComboBox" VerticalAlignment="Center" HorizontalAlignment="Right" MinWidth="20" Height="Auto" OpacityMask="Black" Visibility="Collapsed" Text="" Grid.Column="0" Grid.ColumnSpan="1"/> </Grid> </my:DataGridHeaderBorder> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Trigger.EnterActions> <BeginStoryboard x:Name="ShowFilterControl_BeginStoryboard" Storyboard="{StaticResource ShowFilterControl}"/> <StopStoryboard BeginStoryboardName="HideFilterControl_BeginShowFilterControl"/> </Trigger.EnterActions> <Trigger.ExitActions> <BeginStoryboard x:Name="HideFilterControl_BeginShowFilterControl" Storyboard="{StaticResource HideFilterControl}"/> <StopStoryboard BeginStoryboardName="ShowFilterControl_BeginStoryboard"/> </Trigger.ExitActions> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> <Setter Property="Background"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF0067AD" Offset="1"/> <GradientStop Color="#FF003355" Offset="0.5"/> <GradientStop Color="#FF78A8C9" Offset="0"/> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Foreground" Value="White"/> <Setter Property="BorderBrush"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#D8000000" Offset="0.664"/> <GradientStop Color="#7F003355" Offset="1"/> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="FontWeight" Value="Bold"/> <Setter Property="BorderThickness" Value="1,1,1,0"/> <Setter Property="HorizontalContentAlignment" Value="Center"/> <Setter Property="Padding" Value="5,0"/> </Style> As you can see, I'm trying to databind the combobox's ItemsSource to Types, but this doesn't work. The list is in my ViewModel that is being applied to my page, how would I specify in this style that is in my resource dictionary that I want to bind to a source in my viewmodel.

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  • Wpf nesting containers

    - by dortzur
    On a window control, my main container is a grid. My grid has 2 rows, one row definition is 50*, and the other is 250*. Now i want to add a right sidebar, lets say with a StackPanel. I would like to have a ListBox inside the StackPanel that aligns with the 50* grid row, so as the window height gets bigger, the ListBox size will also get bigger. My question is whether i can achieve this behavior while the ListBox is inside the StackPanel (which is nested inside the grid) or must the ListBox be placed directly inside the grid?

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  • International Radio Operators Alphabet in F# &amp; Silverlight &ndash; Part 2

    - by MarkPearl
    So the brunt of my my very complex F# code has been done. Now it’s just putting the Silverlight stuff in. The first thing I did was add a new project to my solution. I gave it a name and VS2010 did the rest of the magic in creating the .Web project etc. In this instance because I want to take the MVVM approach and make use of commanding I have decided to make the frontend a Silverlight4 project. I now need move my F# code into a proper Silverlight Library. Warning – when you create the Silverlight Library VS2010 will ask you whether you want it to be based on Silverlight3 or Silverlight4. I originally went for Silverlight4 only to discover when I tried to compile my solution that I was given an error… Error 12 F# runtime for Silverlight version v4.0 is not installed. Please go to http://go.microsoft.com/fwlink/?LinkId=177463 to download and install matching.. After asking around I discovered that the Silverlight4 F# runtime is not available yet. No problem, the suggestion was to change the F# Silverlight Library to a Silverlight3 project however when going to the properties of the project file – even though I changed it to Silverlight3, VS2010 did not like it and kept reverting it to a Silverlight4 project. After a few minutes of scratching my head I simply deleted Silverlight4 F# Library project and created a new F# Silverlight Library project in Silverlight3 and VS2010 was happy. Now that the project structure is set up, rest is fairly simple. You need to add the Silverlight Library as a reference to the C# Silverlight Front End. Then setup your views, since I was following the MVVM pattern I made a Views & ViewModel folder and set up the relevant View and ViewModels. The MainPageViewModel file looks as follows using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Collections.ObjectModel; namespace IROAFrontEnd.ViewModels { public class MainPageViewModel : ViewModelBase { private string _iroaString; private string _inputCharacters; public string InputCharacters { get { return _inputCharacters; } set { if (_inputCharacters != value) { _inputCharacters = value; OnPropertyChanged("InputCharacters"); } } } public string IROAString { get { return _iroaString; } set { if (_iroaString != value) { _iroaString = value; OnPropertyChanged("IROAString"); } } } public ICommand MySpecialCommand { get { return new MyCommand(this); } } public class MyCommand : ICommand { readonly MainPageViewModel _myViewModel; public MyCommand(MainPageViewModel myViewModel) { _myViewModel = myViewModel; } public event EventHandler CanExecuteChanged; public bool CanExecute(object parameter) { return true; } public void Execute(object parameter) { var result = ModuleMain.ConvertCharsToStrings(_myViewModel.InputCharacters); var newString = ""; foreach (var Item in result) { newString += Item + " "; } _myViewModel.IROAString = newString.Trim(); } } } } One of the features I like in Silverlight4 is the new commanding. You will notice in my I have put the code under the command execute to reference to my F# module. At the moment this could be cleaned up even more, but will suffice for now.. public void Execute(object parameter) { var result = ModuleMain.ConvertCharsToStrings(_myViewModel.InputCharacters); var newString = ""; foreach (var Item in result) { newString += Item + " "; } _myViewModel.IROAString = newString.Trim(); } I then needed to set the view up. If we have a look at the MainPageView.xaml the xaml code will look like the following…. Nothing to fancy, but battleship grey for now… take careful note of the binding of the command in the button to MySpecialCommand which was created in the ViewModel. <UserControl x:Class="IROAFrontEnd.Views.MainPageView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot" Background="White"> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBox Grid.Row="0" Text="{Binding InputCharacters, Mode=TwoWay}"/> <Button Grid.Row="1" Command="{Binding MySpecialCommand}"> <TextBlock Text="Generate"/> </Button> <TextBlock Grid.Row="2" Text="{Binding IROAString}"/> </Grid> </UserControl> Finally in the App.xaml.cs file we need to set the View and link it to the ViewModel. private void Application_Startup(object sender, StartupEventArgs e) { var myView = new MainPageView(); var myViewModel = new MainPageViewModel(); myView.DataContext = myViewModel; this.RootVisual = myView; }   Once this is done – hey presto – it worked. I typed in some “Test Input” and clicked the generate button and the correct Radio Operators Alphabet was generated. And that’s the end of my first very basic F# Silverlight application.

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  • Unable to find static resource in runtime even while designer can see it

    - by xumix
    So i have this markup: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper"> <Style TargetType="{x:Type UserControl}" x:Key="WizardPageControl" x:Name="WizardPageControl"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type UserControl}"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="10" /> <ColumnDefinition Width="475" /> <ColumnDefinition Width="10" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="10" /> <RowDefinition Height="410"/> <RowDefinition Height="50" /> <RowDefinition Height="10" /> </Grid.RowDefinitions> <StackPanel Orientation="Vertical" Name="MainContent" Grid.Row="1" Grid.Column="1"> <ContentPresenter Content="{TemplateBinding Content}"/> </StackPanel> <StackPanel Grid.Column="1" Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Bottom" Margin="0,0,0,10" Height="30"> <Button Name="BackButton" Width="50" xml:space="preserve">&lt; _Back</Button> <Button Name="NextButton" Width="50" Margin="10,0,0,0" xml:space="preserve" IsDefault="True">_Next &gt;</Button> <Button Name="CancelButton" Width="50" Margin="10,0,0,0" IsCancel="True">_Cancel</Button> <Button Name="FinishButton" IsEnabled="True" Width="50" Margin="10,0,0,0">_Finish</Button> </StackPanel> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> <Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Resources\WizardPageControl.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources> </Application> <UserControl x:Class="Werp.MigrationHelper.WizardPageControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:Werp.MigrationHelper" mc:Ignorable="d"> </UserControl> Then I try to use it: <PageFunction xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Werp.MigrationHelper" x:Class="Werp.MigrationHelper.WizardPage1" x:TypeArguments="local:WizardResult" KeepAlive="True" WindowTitle="Wizard Page 1" > <local:WizardPageControl Style="{StaticResource ResourceKey=WizardPageControl}"> <local:WizardPageControl.Content> qweqweqweqweq </local:WizardPageControl.Content> </local:WizardPageControl> </PageFunction> The VS designer show everything Ok, but in runtime i get System.Windows.Markup.XamlParseException occurred Message='Provide value on 'System.Windows.StaticResourceExtension' threw an exception.' Line number '4' and line position '5'. Source=PresentationFramework LineNumber=4 LinePosition=5 StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at Werp.MigrationHelper.WizardPage1.InitializeComponent() in d:\Home\Docs\Visual Studio 2008\Projects\csharp\wizardpage1.xaml:line 1 at Werp.MigrationHelper.WizardPage1..ctor(WizardData wizardData) in D:\home\Docs\Visual Studio 2008\Projects\csharp\WizardPage1.xaml.cs:line 12 InnerException: Message=Cannot find resource named 'WizardPageControl'. Resource names are case sensitive. Source=PresentationFramework StackTrace: at System.Windows.StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider) at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider) InnerException: Whats the prolem??

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  • Customize WPF databinding: How to add custom logic?

    - by Ashwani Mehlem
    Hi, i have a question regarding some complex data-binding. I want to be able to update a grid (which has the property "IsItemsHost" set to true) dynamically whenever a data-binding occurs. To be more specific, i bind the grid to some items and i want to change the number of grid rows depending on these items, add something like a header (one row containing some text), and set the items' Grid.Row and Grid.Column using some custom logic. What is the easiest way to apply such behaviour whenever the bound data is updated? Do i have to use a viewmodel that also contains the header data? Thanks in advance.

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  • Finding the TextBlock that is part of the default control template ComboBox generated through code.

    - by uriya
    I'm trying to find the TextBlock that is inside the control template of a comboBox. using VisualTreeHelpar.GetChildrenCount is working only if the comboBox is declared in XAML.In that case GetChildrenCount returns 1 and a recursive search is possible. However, if I declare the combo as a member of the Window class using code, allocated and setting it to its place, the function GetChildrenCount return 0. When I run snoop in this scenario It shows the combo children hierarchy. I want to be able to search the comboBox just as snoop does. Any help would be appreciated. code: ComboBox mCombo = null; private void Windows_Loaded(object sender, RoutedEventArgs e) { mCombo = new ComboBox; mGrid.Children.Add(mCombo); Grid.SetRow(mCombo,0); int count = VisualTreeHelpar.GetChildrenCount(mCombo); }

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  • Replacing text in NSTextFieldCell inside NSTableView

    - by earl.ct
    Whenever a user would type a number, my app would automatically prepend a currency sign before that number. For example, when the user types "1" in a text field, the text inside it becomes "$1.00". All is good when I use an NSNumberFormatter, an NSTextField, and its delegate method control:didFailToFormatString:errorDescription:. - (BOOL)control:(NSControl *)control didFailToFormatString:(NSString *)string errorDescription:(NSString *)error { if ([[control formatter] isKindOfClass:[NSNumberFormatter class]]) { NSNumberFormatter *formatter = [control formatter]; if ([formatter numberStyle] == NSNumberFormatterCurrencyStyle && ! [string hasPrefix:[formatter currencySymbol]]) { NSDecimalNumber *new = [NSDecimalNumber decimalNumberWithString:string]; if (new == [NSDecimalNumber notANumber]) { new = [NSDecimalNumber zero]; } [control setObjectValue:new]; } } return YES;} Now I would like to have this functionality when a user types a number in a cell inside an NSTableView. I tried using control:didFailToFormatString:errorDescription: but the cell would erase the text instead.

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  • WPF Horizontal Scrollbar is not visible

    - by Ant
    Hi All,      I have a Grid inside ScrollViewer. Grid has only one columns and many rows. I add controls into grid rows. The problem is I can see VerticalScrollBar when I am adding controls but I cannot see HorizontalScrollBar although I add very wide controls. My xaml looks like the following <ScrollViewer> <Grid> rows ... </Grid> </ScrollViewer> Thanks, ant.

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  • Silverlight 4 Twitter Client &ndash; Part 7

    - by Max
    Download this article as a PDF Welcome back :) This week we are going to look at something more exciting and a much required feature for any twitter client – auto refresh so as to show new status updates. We are going to achieve this using Silverlight 4 Timers and a bit and refresh our datagrid every 2 minutes to show new updates. We will do this so that we do only minimal request to the twitter api, so that twitter does not block us – there is a limit of 150 request an hour. Let us get started now. Also we will get the profile user id hyperlinked, so that when ever the user click on it, we will take them to their twitter page. Also it was a pain to always run this application by pressing F5, then it would open in a browser you would have to right click uninstall and install it again to see any changes. All this and yet we were not able to debug it :( Now there is a solution for this to run a silverlight application directly out of browser and yet have the debug feature. Super cool, here is how. Right on the Silverlight project and go to debug and then select the Out-Of-Browser application option and choose the *.Web project. Then just right click on the SL project and set as Startup Project. There you go, now every time you press F5, it will automatically run out of browser and still have the debug options. I go to know about this after some binging. Now let us jump to the core straight away. 1) To get the user id hyperlinked, we need to have a DataGridTemplateColumn and within that have a HyperLinkButton. The code for this will  be <data:DataGridTemplateColumn> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate> <HyperlinkButton Click="HyperlinkButton_Click" Content="{Binding UserName}" TargetName="_blank" ></HyperlinkButton> </DataTemplate> </data:DataGridTemplateColumn.CellTemplate> </data:DataGridTemplateColumn> 2) Now let us look at how we are getting this done by looking into HyperlinkButton_Click event handler. There we will dynamically set the NavigateUri to the twitter page. I tried to do this using some binding, eval like stuff as in ASP.NET, but no luck! private void HyperlinkButton_Click(object sender, RoutedEventArgs e) { HyperlinkButton hb = (HyperlinkButton)e.OriginalSource; hb.NavigateUri = new Uri("http://twitter.com/" + hb.Content.ToString(), UriKind.Absolute); } 3) Now we need to switch on our Timer right in the OnNavigated to event on our SL page. So we need to modify our OnNavigated event to some thing like below: protected override void OnNavigatedTo(NavigationEventArgs e) { image1.Source = new BitmapImage(new Uri(GlobalVariable.profileImage, UriKind.Absolute)); this.Title = GlobalVariable.getUserName() + " - Home"; if (!GlobalVariable.isLoggedin()) this.NavigationService.Navigate(new Uri("/Login", UriKind.Relative)); else { currentGrid = "Timeline-Grid"; TwitterCredentialsSubmit(); myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 60, 0); myDispatcherTimer.Tick += new EventHandler(Each_Tick); myDispatcherTimer.Start(); } } I use a global string – here it is currentGrid variable to indicate what is bound in the datagrid so that after every timer tick, I can rebind the latest data to it again. Like I will only rebind the friends timeline again if the data grid currently holds it and I’ll only rebind the respective list status again in the data grid, if already a list status is bound to the data grid. In the above timer code, its set to trigger the Each_Tick event handler every 1 minute (60 seconds). TimeSpan takes in (days, hours, minutes, seconds, milliseconds). 4) Now we need to set the list name in the currentGrid variable when a list button is clicked. So add the code line below to the list button event handler currentGrid = currentList = b.Content.ToString(); 5) Now let us see how Each_Tick event handler is implemented. public void Each_Tick(object o, EventArgs sender) { if (!currentGrid.Equals("Timeline-Grid")) getListStatuses(currentGrid); else { WebRequest.RegisterPrefix("https://", System.Net.Browser.WebRequestCreator.ClientHttp); WebClient myService = new WebClient(); myService.AllowReadStreamBuffering = true; myService.UseDefaultCredentials = false; myService.Credentials = new NetworkCredential(GlobalVariable.getUserName(), GlobalVariable.getPassword()); myService.DownloadStringCompleted += new DownloadStringCompletedEventHandler(TimelineRequestCompleted); myService.DownloadStringAsync(new Uri("https://twitter.com/statuses/friends_timeline.xml")); } } If the data grid hold friends timeline, I just use the same bit of code we had already to bind the friends timeline to the data grid. Copy Paste. But if it is some list timeline that is bound in the datagrid, I then call the getListStatus method with the currentGrid string which will actually be holding the list name. 6) I wanted to make the hyperlinks inside the status message as hyperlinks and when the user clicks on it, we can then open that link. I tried using a convertor and using a regex to recognize a url and wrap it up with a href, but that is not gonna work in silverlight textblock :( Anyways that convertor code is in the zip file. 7) You can get the complete project files from here. 8) Please comment below for your doubts, suggestions, improvements. I will try to reply as early as possible. Thanks for all your support. Technorati Tags: Silverlight 4,Datagrid,Twitter API,Silverlight Timer

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  • AssociatedControlId of inner namingcontainer

    - by Eric
    Hi, I have a custom control contains a label control. I want to set the AssociatedControlId of this label to be other control id on the page, but as soon as I implement the INamingContainer in my custom control, it will run into an error saying "Unable to find control with id 'abc' that is associated with the Label 'xyz'." This would be due to the fact that the label is in a nested naming container and it trys to find the control within the same container but couldn't (as the control is on the page, outside of it own naming container) Anyone know of a way to set this property? Thanks, Eric

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  • Composing Silverlight Applications With MEF

    - by PeterTweed
    Anyone who has written an application with complexity enough to warrant multiple controls on multiple pages/forms should understand the benefit of composite application development.  That is defining your application architecture that can be separated into separate pieces each with it’s own distinct purpose that can then be “composed” together into the solution. Composition can be useful in any layer of the application, from the presentation layer, the business layer, common services or data access.  Historically people have had different options to achieve composing applications from distinct well known pieces – their own version of dependency injection, containers to aid with composition like Unity, the composite application guidance for WPF and Silverlight and before that the composite application block. Microsoft has been working on another mechanism to aid composition and extension of applications for some time now – the Managed Extensibility Framework or MEF for short.  With Silverlight 4 it is part of the Silverlight environment.  MEF allows a much simplified mechanism for composition and extensibility compared to other mechanisms – which has always been the primary issue for adoption of the earlier mechanisms/frameworks. This post will guide you through the simple use of MEF for the scenario of composition of an application – using exports, imports and composition.  Steps: 1.     Create a new Silverlight 4 application. 2.     Add references to the following assemblies: System.ComponentModel.Composition.dll System.ComponentModel.Composition.Initialization.dll 3.     Add a new user control called LeftControl. 4.     Replace the LayoutRoot Grid with the following xaml:     <Grid x:Name="LayoutRoot" Background="Beige" Margin="40" >         <Button Content="Left Content" Margin="30"></Button>     </Grid> 5.     Add the following statement to the top of the LeftControl.xaml.cs file using System.ComponentModel.Composition; 6.     Add the following attribute to the LeftControl class     [Export(typeof(LeftControl))]   This attribute tells MEF that the type LeftControl will be exported – i.e. made available for other applications to import and compose into the application. 7.     Add a new user control called RightControl. 8.     Replace the LayoutRoot Grid with the following xaml:     <Grid x:Name="LayoutRoot" Background="Green" Margin="40"  >         <TextBlock Margin="40" Foreground="White" Text="Right Control" FontSize="16" VerticalAlignment="Center" HorizontalAlignment="Center" ></TextBlock>     </Grid> 9.     Add the following statement to the top of the RightControl.xaml.cs file using System.ComponentModel.Composition; 10.   Add the following attribute to the RightControl class     [Export(typeof(RightControl))] 11.   Add the following xaml to the LayoutRoot Grid in MainPage.xaml:         <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">             <Border Name="LeftContent" Background="Red" BorderBrush="Gray" CornerRadius="20"></Border>             <Border Name="RightContent" Background="Red" BorderBrush="Gray" CornerRadius="20"></Border>         </StackPanel>   The borders will hold the controls that will be imported and composed via MEF. 12.   Add the following statement to the top of the MainPage.xaml.cs file using System.ComponentModel.Composition; 13.   Add the following properties to the MainPage class:         [Import(typeof(LeftControl))]         public LeftControl LeftUserControl { get; set; }         [Import(typeof(RightControl))]         public RightControl RightUserControl { get; set; }   This defines properties accepting LeftControl and RightControl types.  The attrributes are used to tell MEF the discovered type that should be applied to the property when composition occurs. 14.   Replace the MainPage constructore with the following code:         public MainPage()         {             InitializeComponent();             CompositionInitializer.SatisfyImports(this);             LeftContent.Child = LeftUserControl;             RightContent.Child = RightUserControl;         }   The CompositionInitializer.SatisfyImports(this) function call tells MEF to discover types related to the declared imports for this object (the MainPage object).  At that point, types matching those specified in the import defintions are discovered in the executing assembly location of the application and instantiated and assigned to the matching properties of the current object. 15.   Run the application and you will see the left control and right control types displayed in the MainPage:   Congratulations!  You have used MEF to dynamically compose user controls into a parent control in a composite application model. In the next post we will build on this topic to cover using MEF to compose Silverlight applications dynamically in download on demand scenarios – so .xap packages can be downloaded only when needed, avoiding large initial download for the main application xap. Take the Slalom Challenge at www.slalomchallenge.com!

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  • Wrapping with Dependency Properties

    - by Chris
    I've got a Windows Forms control that I'm wrapping with a WindowsFormsHost-derived class to access WPF's data binding functionality. The Forms control exposes properties that indicate its state, along with the standard property-changed event notifier. For example, a Zoom property on the Forms control is accompanied with a ZoomChanged event. In the WindowsFormsHost wrapper, I'm using a DependencyProperty to represent the underlying Windows Forms control property. Binding works as expected going to the control; however, I'm not sure how to correctly propogate property changes from the wrapped control back out to binding subscribers (i.e., the Windows Form control changes its Zoom property and raises the ZoomChanged event). Any ideas on how to accomplish this? Should I be using a different approach?

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  • How to access a control placed inside data template of listbox?

    - by Subhen
    Hi I have the following code: <ListBox x:Name="foldersListBox" Grid.Column="0" MouseLeftButtonUp="foldersListBox_MouseLeftButtonUp" BorderThickness="0" Height="AUTO" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"> <DataTemplate> <Border BorderBrush="LightGray" BorderThickness="2" CornerRadius="4"> <Image x:Name="folderImage" Width="70" Height="70" Margin="3" /> </Border> </DataTemplate> </ListBox> Now when I am trying to access folderImage from code behind. I can use the loaded event and typecast the sender as Image type , but I dont want that way. Help plz. Thanks, Subhen

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  • Programatically Drop an External Div in JSTree

    - by Ted Mosbey
    I have a grid (slickgrid) which creates and destroys rows on the fly. I know jstree uses .jstree-draggable to find the external drag targets, but applying them to the grid rows doesn't work - such that I've thought of using the grid drag, and on finish of the grid drag I want to call the jstree "drag_finish": function (data) jQuery.jstree._reference($("#Tree")).dnd_finish(); The problem is that there is some null data. How would I Programatically Drop an External Div? How does jstree apply the .jstree-draggable targets? I could add the .jstree-draggable class to the grid drag helper, but it doesnt seem to fire when dropped on the tree although it clearly has the class. Any guidance would be greatly appreciated. Regards.

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  • System.Timers.Timer leaking due to "direct delegate roots"

    - by alimbada
    Apologies for the rather verbose and long-winded post, but this problem's been perplexing me for a few weeks now so I'm posting as much information as I can in order to get this resolved quickly. We have a WPF UserControl which is being loaded by a 3rd party app. The 3rd party app is a presentation application which loads and unloads controls on a schedule defined by an XML file which is downloaded from a server. Our control, when it is loaded into the application makes a web request to a web service and uses the data from the response to display some information. We're using an MVVM architecture for the control. The entry point of the control is a method that is implementing an interface exposed by the main app and this is where the control's configuration is set up. This is also where I set the DataContext of our control to our MainViewModel. The MainViewModel has two other view models as properties and the main UserControl has two child controls. Depending on the data received from the web service, the main UserControl decides which child control to display, e.g. if there is a HTTP error or the data received is not valid, then display child control A, otherwise display child control B. As you'd expect, these two child controls bind two separate view models each of which is a property of MainViewModel. Now child control B (which is displayed when the data is valid) has a RefreshService property/field. RefreshService is an object that is responsible for updating the model in a number of ways and contains 4 System.Timers.Timers; a _modelRefreshTimer a _viewRefreshTimer a _pageSwitchTimer a _retryFeedRetrievalOnErrorTimer (this is only enabled when something goes wrong with retrieving data). I should mention at this point that there are two types of data; the first changes every minute, the second changes every few hours. The controls' configuration decides which type we are using/displaying. If data is of the first type then we update the model quite frequently (every 30 seconds) using the _modelRefreshTimer's events. If the data is of the second type then we update the model after a longer interval. However, the view still needs to be refreshed every 30 seconds as stale data needs to be removed from the view (hence the _viewRefreshTimer). The control also paginates the data so we can see more than we can fit on the display area. This works by breaking the data up into Lists and switching the CurrentPage (which is a List) property of the view model to the right List. This is done by handling the _pageSwitchTimer's Elapsed event. Now the problem My problem is that the control, when removed from the visual tree doesn't dispose of it's timers. This was first noticed when we started getting an unusually high number of requests on the web server end very soon after deploying this control and found that requests were being made at least once a second! We found that the timers were living on and not stopping hours after the control had been removed from view and that the more timers there were the more requests piled up at the web server. My first solution was to implement IDisposable for the RefreshService and do some clean up when the control's UnLoaded event was fired. Within the RefreshServices Dispose method I've set Enabled to false for all the timers, then used the Stop() method on all of them. I've then called Dispose() too and set them to null. None of this worked. After some reading around I found that event handlers may hold references to Timers and prevent them from being disposed and collected. After some more reading and researching I found that the best way around this was to use the Weak Event Pattern. Using this blog and this blog I've managed to work around the shortcomings in the Weak Event pattern. However, none of this solves the problem. Timers are still not being disabled or stopped (let alone disposed) and web requests are continuing to build up. Mem Profiler tells me that "This type has N instances that are directly rooted by a delegate. This can indicate the delegate has not been properly removed" (where N is the number of instances). As far as I can tell though, all listeners of the Elapsed event for the timers are being removed during the cleanup so I can't understand why the timers continue to run. Thanks for reading. Eagerly awaiting your suggestions/comments/solutions (if you got this far :-p)

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