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• My treeview Data is Not changing.

  - by Vibin Jith

  Hai , I am trying to display the user permission in a treeview.For each user permissions are stored in the database as xml file. In the page, a Combo box used to list the users and a treeView used to bind the Permission xml. When the user get selected in the combo box , i took the xml from the database and connect with xmlDatasource and bind with the treeView. What happening is , First time the TreeView fill with the xml nodes and another time it will not work. For the first selection it's ok. Anothers selections are not effected by the treeview. The code is debugging. No problem. Can you just tell ,why the treeview datasource is not updating. I used this code .. Dim permissionRoot = From permissionNode In MyUser.UserPermissionXml.Root.Elements("menuNode") XmlTreeViewSource.Data = permissionRoot(0).ToString trvPermission.DataSource = XmlTreeViewSource trvPermission.DataBind() SetPermission(trvPermission.Nodes(0)) The markups <asp:TreeView ID="trvPermission" runat="server" ExpandDepth="2" ShowCheckBoxes="All" ShowLines="True" ForeColor="#005782" > <DataBindings> <asp:TreeNodeBinding DataMember="menuNode" TextField="title" ValueField="value" /> </DataBindings> </asp:TreeView>

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• How to write to a Text File in Pipe delimited format from MS Sql Server / ASP.Net?

  - by NJTechGuy

  I have a text file which needs to be constantly updated (regular intervals). All I want is the syntax and possibly some code that outputs data from a MS Sql Database using ASP.Net. The code I have so far is : <%@ Import Namespace="System.IO" %> <script language="vb" runat="server"> sub Page_Load(sender as Object, e as EventArgs) Dim FILENAME as String = Server.MapPath("Output.txt") Dim objStreamWriter as StreamWriter ' If Len(Dir$(FILENAME)) > 0 Then Kill(FILENAME) objStreamWriter = File.AppendText(FILENAME) objStreamWriter.WriteLine("A user viewed this demo at: " & DateTime.Now.ToString()) objStreamWriter.Close() Dim objStreamReader as StreamReader objStreamReader = File.OpenText(FILENAME) Dim contents as String = objStreamReader.ReadToEnd() lblNicerOutput.Text = contents.Replace(vbCrLf, "<br>") objStreamReader.Close() end sub </script> <asp:label runat="server" id="lblNicerOutput" Font-Name="Verdana" /> With PHP, it is a breeze, but with .Net I have no clue. If you could help me with the database connectivity and how to write the data in pipe delimited format to an Output.txt file, that had be awesome. Thanks guys!

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• how can access public properties of MasterPage from external Class ?

  - by eugeneK

  Why i can't access MasterPage's public property (MessagePlaceholder) from other Class (Errors) ? Error compiler gives me is "Error 1 The type or namespace name 'MyMasterPage' could not be found (are you missing a using directive or an assembly reference?)" my master page code behind using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class MyMasterPage : System.Web.UI.MasterPage { public string MessagePlaceholder { get { return messagePlaceholder.InnerHtml; } set { messagePlaceholder.InnerHtml = value; } } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { messagePlaceholder.InnerHtml = Errors.getMessage(); } } } my Errors Class public static string getMessage() { HttpContext c = HttpContext.Current; string messageType = ""; if (c.Session["errorMessage"] != null) { messageType = "errorMessage"; } else if (c.Session["successMessage"] != null) { messageType = "successMessage"; } if (!string.IsNullOrEmpty(messageType)) { StringBuilder userMessageSb = new StringBuilder(); userMessageSb.Append(string.Format("<div id=\"{0}\" title=\"{1}\">{2}</div>", messageType, messageType.Replace("Message",string.Empty), c.Session[messageType])); // fix so message will not re-appear c.Session.Remove(messageType); messageType = userMessageSb.ToString(); } return messageType; } public static void setSuccess(string successMessage, bool isRedirect) { HttpContext.Current.Session["successMessage"] = successMessage; } public static void setError(string errorMessage, bool isRedirect) { HttpContext.Current.Session["errorMessage"] = errorMessage; if (!isRedirect) { ((HttpContext.Current.CurrentHandler as System.Web.UI.Page).Master as MyMasterPage).MessagePlaceholder = getMessage(); } } this is how i set error if (true) { Errors.setError("this is an error demo", false); return; } or with redirect after error if (true) { Errors.setError("yet another error", true); Response.Redirect("~/error.aspx"); }

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• GridView to excel after create send mail c#

  - by Diego Bran

  I want to send a .xlsx , first I created (It has html code in it) then I used a SMTP server to send it , it does attach the file but when I tried to open it " It says that the file is corrupted etc" any help? Here is my code try { System.IO.StringWriter sw = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw); // Render grid view control. gvStock.RenderControl(htw); // Write the rendered content to a file. string renderedGridView = sw.ToString(); File.WriteAllText(@"C:\test\ExportedFile.xls", renderedGridView); // File.WriteAllText(@"C:\test\ExportedFile.xls", p1); } catch (Exception e) { Response.Write(e.Message); } try { MailMessage mail = new MailMessage(); SmtpClient SmtpServer = new SmtpClient("server"); mail.From = new MailAddress("[email protected]"); mail.To.Add("[email protected]"); mail.Subject = "Test Mail - 1"; mail.Body = "mail with attachment"; Attachment data = new Attachment("C:/test/ExportedFile.xls"); mail.Attachments.Add(data); SmtpServer.Port = 25; SmtpServer.Credentials = new System.Net.NetworkCredential("user", "pass"); // SmtpServer.EnableSsl = true; SmtpServer.UseDefaultCredentials = false; SmtpServer.Send(mail); } catch( Exception e) { Response.Write(e.Message); }

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• A rectangle drawn with DrawingContext.DrawRectangle blocks mouse

  - by dharmatech

  The WPF program below puts up a window which looks like this: Mouse-movement outside the black square causes the window title to be updated with the mouse's position. The updating stops when the mouse enters the square. I'd like for MouseMove to continue to trigger even when the mouse is over the square. Is there a way to do this? using System.Windows; using System.Windows.Controls; using System.Windows.Media; namespace Wpf_Particle_Demo { class DrawingVisualElement : FrameworkElement { public DrawingVisual visual; public DrawingVisualElement() { visual = new DrawingVisual(); } protected override int VisualChildrenCount { get { return 1; } } protected override Visual GetVisualChild(int index) { return visual; } } public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); var canvas = new Canvas(); Content = canvas; var element = new DrawingVisualElement(); canvas.Children.Add(element); CompositionTarget.Rendering += (s, e) => { using (var dc = element.visual.RenderOpen()) dc.DrawRectangle(Brushes.Black, null, new Rect(0, 0, 50, 50)); }; MouseMove += (s, e) => Title = e.GetPosition(canvas).ToString(); } } }

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• How to change a button from another function?

  - by Fernando SBS

  var ButtonFarmAtivada = new Array(); function X() { var tableCol = dom.cn("td"); //cell 0 //create start checkbox button ButtonFarmAtivada[index] = createInputButton("checkbox", index); ButtonFarmAtivada[index].name = "buttonFarmAtivada_"+index; ButtonFarmAtivada[index].checked = GM_getValue("farmAtivada_"+index, true); FM_log(3,"checkboxFarm "+(index)+" = "+GM_getValue("farmAtivada_"+index)); ButtonFarmAtivada[index].addEventListener("click", function() { rp_farmAtivada(index); }, false); tableCol.appendChild(ButtonFarmAtivada[i]); tableRow.appendChild(tableCol); // add the cell } 1) is it possible to create the button inside an array as I'm trying to do in that example? like an array of buttons? 2) I ask that because I will have to change this button later from another function, and I'm trying to do that like this (not working): function rp_marcadesmarcaFarm(valor) { var vListID = getAllVillageId().toString(); FM_log(4,"MarcaDesmarcaFarm + vListID="+vListID); var attackList = vListID.split(","); for (i = 0; i <= attackList.length; i++) { FM_log(3, "Marca/desmarca = "+i+" "+buttonFarmAtivada[i].Checked); ButtonFarmAtivada[i].Checked = valor; }; };

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• Memory optimization while downloading

  - by lboregard

  hello all i have the following piece of code, that im looking forward to optimize, since i'm consuming gobs of memory this routine is heavily used first optimization would be to move the stringbuilder construction out of the download routine and make it a field of the class, then i would clear it inside the routine can you please suggest any other optimization or point me in the direction of some resources that could help me with this (web articles, books, etc). i'm thinking about replacing the stringbuilder by a fixed (much larger) size buffer ... or perhaps create a larger sized stringbuilder thanks in advance. StreamWriter _writer; StreamReader _reader; public string Download(string msgId) { _writer.WriteLine("BODY <" + msgId + ">"); string response = _reader.ReadLine(); if (!response.StartsWith("222")) return null; bool done = false; StringBuilder body = new StringBuilder(256* 1024); do { response = _reader.ReadLine(); if (OnProgress != null) OnProgress(response.Length); if (response == ".") { done = true; } else { if (response.StartsWith("..")) response = response.Remove(0, 1); body.Append(response); body.Append("\r\n"); } } while (!done); return body.ToString(); }

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• .net mvc2 custom HtmlHelper extension unit testing

  - by alex

  My goal is to be able to unit test some custom HtmlHelper extensions - which use RenderPartial internally. http://ox.no/posts/mocking-htmlhelper-in-asp-net-mvc-2-and-3-using-moq I've tried using the method above to mock the HtmlHelper. However, I'm running into Null value exceptions. "Parameter name: view" Anyone have any idea?? Thanks. Below are the ideas of the code: [TestMethod] public void TestMethod1() { var helper = CreateHtmlHelper(new ViewDataDictionary()); helper.RenderPartial("Test"); // supposingly this line is within a method to be tested Assert.AreEqual("test", helper.ViewContext.Writer.ToString()); } public static HtmlHelper CreateHtmlHelper(ViewDataDictionary vd) { Mock<ViewContext> mockViewContext = new Mock<ViewContext>( new ControllerContext( new Mock<HttpContextBase>().Object, new RouteData(), new Mock<ControllerBase>().Object), new Mock<IView>().Object, vd, new TempDataDictionary(), new StringWriter()); var mockViewDataContainer = new Mock<IViewDataContainer>(); mockViewDataContainer.Setup(v => v.ViewData) .Returns(vd); return new HtmlHelper(mockViewContext.Object, mockViewDataContainer.Object); }

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• array loop not complete

  - by user217582

  Whenever the cursor move over the note, it would call getCollision() function to store the name of the sprite. Can store more than one sprite in array but the normalNote() function failed to work correctly? When I click a button which called normalNote(), it would only loop once (one note was redraw) before the pop. After the pop, it should have continue to loop until the rest of the notes from getChildbyname is redraw. Wonder if there any missing code? private function getCollision(x:int, pt:int):void { for(var i:int=pt;i<tickArray.length;i++) { if(typeArray[i]=="eighth") { var getCurrentNote:String = "note"+i; var child:Sprite = c.getChildByName(getCurrentNote) as Sprite; drawEighthUp(child,"-","-",0xff0000); tempNote.push(getCurrentNote); } } } private function normalNote():void { for(var iii:int=0;iii<tempNote.length;iii++) { var child:Sprite = c.getChildByName(tempNote[iii]) as Sprite; trace("tt",tempNote.length); trace("iii",iii); var asd:String = tempNote[iii].toString(); var idx:int = int(asd.substr(4)); if(typeArray[idx]=="eighth") { drawEighthUp(child,"-","-",0x000000); tempNote.pop(); } } }

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• Problem in DataBinding an Enum using dictionary approach to a combobox in WPF.

  - by Ashish Ashu

  I have a Dictionary which is binded to a combobox. I have used dictionary to provide spaces in enum. public enum Option {Enter_Value, Select_Value}; Dictionary<Option,string> Options; <ComboBox x:Name="optionComboBox" SelectionChanged="optionComboBox_SelectionChanged" SelectedValuePath="Key" DisplayMemberPath="Value" SelectedItem="{Binding Path = SelectedOption}" ItemsSource="{Binding Path = Options}" /> This works fine. My queries: 1. I am not able to set the initial value to a combo box. In above XAML snippet the line SelectedItem="{Binding Path = SelectedOption}" is not working. I have declared SelectOption in my viewmodel. This is of type string and I have intialized this string value in my view model as below: SelectedOption = Options[Options.Enter_Value].ToString(); 2. The combobox is binded to datadictionary which have two options first is "Enter_value" and second is "Select_value" which is actually Option enum. Based on the Option enum value I want to perform different action. For example if option is equal to option.Enter_value then Combo box becomes editable and user can enter the numeric value in it. if option is equal to option.Select_value value then the value comes from the database and the combo box becomes read only and shows the fetched value from the database. Please Help!!

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• How to convert "0" and "1" to false and true

  - by Chris

  I have a method which is connecting to a database via Odbc. The stored procedure which I'm calling has a return value which from the database side is a 'Char'. Right now I'm grabbing that return value as a string and using it in a simple if statement. I really don't like the idea of comparing a string like this when only two values can come back from the database, 0 and 1. OdbcCommand fetchCommand = new OdbcCommand(storedProc, conn); fetchCommand.CommandType = CommandType.StoredProcedure; fetchCommand.Parameters.AddWithValue("@column ", myCustomParameter); fetchCommand.Parameters.Add("@myReturnValue", OdbcType.Char, 1). Direction = ParameterDirection.Output; fetchCommand.ExecuteNonQuery(); string returnValue = fetchCommand.Parameters["@myReturnValue"].Value.ToString(); if (returnValue == "1") { return true; } What would be the proper way to handle this situation. I've tried 'Convert.ToBoolean()' which seemed like the obvious answer but I ran into the 'String was not recognized as a valid Boolean. ' exception being thrown. Am I missing something here, or is there another way to make '1' and '0' act like true and false? Thanks!

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• xmldocument and nested schemas

  - by Stuart

  Using c# and .net 3.5 I'm trying to validate an xml document against a schema that has includes. The schemas and there includes are as below Schema1.xsd - include another.xsd another.xsd - include base.xsd When i try to add the Schema1.xsd to the XmlDocument i get the following error. Type 'YesNoType' is not declared or is not a simple type. I believe i'm getting this error because the base.xsd file is not being included when i load the Schema1.xsd schema. I'm trying to use the XmlSchemaSet class and I'm setting the XmlResolver uri to the location of the schemas. NOTE : All schemas live under the same directory E:\Dev\Main\XmlSchemas Here is the code string schemaPath = "E:\\Dev\\Main\\XmlSchemas"; XmlDocument xmlDocSchema = new XmlDocument(); XmlSchemaSet s = new XmlSchemaSet(); XmlUrlResolver resolver = new XmlUrlResolver(); Uri baseUri = new Uri(schemaPath); resolver.ResolveUri(null, schemaPath); s.XmlResolver = resolver; s.Add(null, XmlReader.Create(new System.IO.StreamReader(schemaPath + "\\Schema1.xsd"), new XmlReaderSettings { ValidationType = ValidationType.Schema, XmlResolver = resolver }, new Uri(schemaPath).ToString())); xmlDocSchema.Schemas.Add(s); ValidationEventHandler valEventHandler = new ValidationEventHandler (ValidateNinoDobEvent); try { xmlDocSchema.LoadXml(xml); xmlDocSchema.Validate(valEventHandler); } catch (XmlSchemaValidationException xmlValidationError) { // need to interogate the Validation Exception, for possible further // processing. string message = xmlValidationError.Message; return false; } Can anyone point me in the right direction regarding validating an xmldocument against a schema with nested includes.

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• <string xmlns=''> was not expected in c#

  - by Nishant

  Hi all I am trying to serialize value in xml. Every time I am getting <string xmlns=''> was not expected in c# Not able to find root cause plz help me out here. namespace CustomDataType.usercontrols { public partial class CustomDataTypes : System.Web.UI.UserControl, umbraco.editorControls.userControlGrapper.IUsercontrolDataEditor { private Status _umbval; public object value { get { var status = GetStatus(); return SerializationHelper.ValueToXmlString(status); } set { //if (value == null || string.IsNullOrEmpty(value.ToString())) //{ // _umbval = Status.Empty; //} //else //{ _umbval =(Status)SerializationHelper.ValueFromXmlString(value,typeof(Status)); //} } } } } using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Xml.Serialization; namespace CustomDataType { [Serializable] [XmlRoot("StatuMain")] public class Status { [XmlElement("statusvalue")] public string StatusValue { get; set; } [XmlElement("statusvalue1")] public string StatusValue1 { get; set; } [XmlElement("statusvalue2")] public string StatusValue2 { get; set; } [XmlElement("statusvalue3")] public string StatusValue3 { get; set; } //[XmlElement("isEmailChecked")] //public bool HasEmailChecked { get; set; } //[XmlElement("datetime")] //public DateTime Date { get; set; } public static Status Empty { get { var schedule = new Status(); schedule = null; return schedule; } } } }

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• ANDROID IF/ELSE FAILS CONTINUES TO EXECUTE JSON

  - by Keith Cesar Haizlett

  I am trying to create a Registration app with JSON to connect and post to MYSQL database. I created the following IF/ELSE statements to check for vacant input boxes, password match, and correct email characters before allowing it to be entered into the DATABASE. The code continues to execute the JSON posting even after the passwords don't match , invalid email characters are entered , and vacant text boxes are submitted. Why is it not returning and continuing to execute the JSON code? try { if (!inputEmail.getText().toString().matches("[a-zA-Z0-9._-]+@[a-z]+.[a-z]+") && email.length() > 0) { Toast.makeText(getApplicationContext(), "Enter Valid Email Address", Toast.LENGTH_LONG).show(); return; } else if(name.equals("") || email.equals("")|| password.equals("")||check.equals("")) { Toast.makeText(getApplicationContext(), "Field Vaccant", Toast.LENGTH_LONG).show(); return; } // check if both password matches else if(!password.equals(checkpass)) { Toast.makeText(getApplicationContext(), "Password does not match", Toast.LENGTH_LONG).show(); return; } if (json.getString(KEY_SUCCESS) != null) { registerErrorMsg.setText(""); String res = json.getString(KEY_SUCCESS); if(Integer.parseInt(res) == 1){ // user successfully registred // Store user details in SQLite Database DatabaseHandler db = new DatabaseHandler(getApplicationContext()); JSONObject json_user = json.getJSONObject("user"); // Clear all previous data in database userFunction.logoutUser(getApplicationContext()); db.addUser(json_user.getString(KEY_NAME), json_user.getString(KEY_EMAIL), json.getString(KEY_UID), json_user.getString(KEY_CREATED_AT)); // Launch Dashboard Screen Intent dashboard = new Intent(getApplicationContext(), DashboardActivity.class); // Close all views before launching Dashboard dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(dashboard); // Close Registration Screen finish(); }else{ // Error in registration registerErrorMsg.setText("User already Registered"); } } } catch (JSONException e) { } } });

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• asp.net dynamic HTML form

  - by user204588

  Hi, I want to create an html page inside a asp.net page using c# and then request that html page. The flow is, I'll be creating a request that will give me a response with some values. Those values will be stored in hidden fields in the html page I'm creating on the fly and then requesting. I figure it would be something like below but I'm not sure if it would work, I've also received some "Thread Aborting" errors. So, does anyone know the proper way to do this or at least direct me to a nice article or something? StringBuilder builder = new StringBuilder(); builder.Append("<html><head></head>"); builder.Append("<body onload=\"document.aButton.submit();\">"); builder.Append("<input type=\"hidden\" name=\"something\" value=\"" + aValue + "\">"); HttpContext.Current...Response.Write(builder.ToString()); ... end response

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• Issue with WatchService in java 7

  - by user972590

  I'm using jdk7's WatchService API for monitoring the folder on file system.I'm sending a new file through email to that folder, when the file comes into that folder i m triggering the ENTRY_CRATE option. its working fine. But the issue is its generating two events of ENTRY_CREATE instead of one event which i'm invoking. BELOW IS THE CODE: Path dir = Paths.get(/var/mail); WatchService watcher = dir.getFileSystem().newWatchService(); dir.register(watcher, StandardWatchEventKinds.ENTRY_CREATE); System.out.println("waiting for new file"); WatchKey watckKey = watcher.take(); List<WatchEvent<?>> events = watckKey.pollEvents(); System.out.println(events.size()); for(WatchEvent<?> event : events){ if(event.kind() == StandardWatchEventKinds.ENTRY_CREATE){ String fileCreated=event.context().toString().trim(); } } In the above code I'm gettng the events size as 2. Can any one please help me in finding out the reason why i'm getting two events.

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• Need help with a custom Spinner/ArrayAdapter setup

  - by MisterSquonk

  I have a WeatherSpinner class which extends Spinner. The class shows region names which I originally did using an ArrayAdapter<String> but I now want to use ArrayAdapter<Locale>(Locale is an abstract 'empty' class of my own). I'm getting a ClassCastException when trying to populate my ArrayAdapter with the following... protected ArrayList<?> theList; protected ArrayAdapter<Locale> aa = null; ... protected void updateContents(ArrayList<?> list, int selectedItem) { theList = list; // Exception thrown on next line aa = new ArrayAdapter<Locale>(theContext, android.R.layout.simple_spinner_item, (Locale[]) theList.toArray()); ... } I'm passing a RegionList object into updateContents() as the 'list' parameter and RegionList extends ArrayList<Region>, and Region extends Locale. I've also overriden Region's toString() method to return a valid String. What am I not seeing here? Am I wrong about the way ArrayList<?>.toArray() works?

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• Silverlight 4, Google Chrome, and HttpWebRequest problem

  - by synergetic

  My Silvrlight 4 application hosted in ASP.NET MVC 2 working fine when used through Internet Explorer 8, both in development server and remote web server (IIS 6.0). However when I try to browse through Google Chrome (version 5.0.375.70) it throws "remote server returned not found" error. The code causing the problem is the following: public class MyWebClient { private HttpWebRequest _request; private Uri _uri; private AsyncOperation _asyncOp; public MyWebClient(Uri uri) { _uri = uri; } public void Start(XElement data) { _asyncOp = AsyncOperationManager.CreateOperation(null); _data = data; _request = (HttpWebRequest)WebRequest.Create(_uri); _request.Method = "POST"; _request.BeginGetRequestStream(new AsyncCallback(BeginRequest), null); } private void BeginRequest(IAsyncResult result) { Stream stream = _request.EndGetRequestStream(result); using (StreamWriter writer = new StreamWriter(stream)) { writer.Write(((XElement)_data).ToString()); } stream.Close(); _request.BeginGetResponse(new AsyncCallback(BeginResponse), null); } private void BeginResponse(IAsyncResult result) { HttpWebResponse response = (HttpWebResponse)_request.EndGetResponse(result); if (response != null) { //process returned data ... } } ... } In short, the above code sends some XML data to web server (to ASP.NET MVC controller) and gets back a processed data. It works when I use Internet Explorer 8. Can someone please explain what is the problem with Google Chrome?

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• read files from directory and filter files from Java

  - by Adnan

  The following codes goes through all directories and sub-directories and outputs just .java files; import java.io.File; public class DirectoryReader { private static String extension = "none"; private static String fileName; public static void main(String[] args ){ String dir = "C:/tmp"; File aFile = new File(dir); ReadDirectory(aFile); } private static void ReadDirectory(File aFile) { File[] listOfFiles = aFile.listFiles(); if (aFile.isDirectory()) { listOfFiles = aFile.listFiles(); if(listOfFiles!=null) { for(int i=0; i < listOfFiles.length; i++ ) { if (listOfFiles[i].isFile()) { fileName = listOfFiles[i].toString(); int dotPos = fileName.lastIndexOf("."); if (dotPos > 0) { extension = fileName.substring(dotPos); } if (extension.equals(".java")) { System.out.println("FILE:" + listOfFiles[i] ); } } if(listOfFiles[i].isDirectory()) { ReadDirectory(listOfFiles[i]); } } } } } } Is this efficient? What could be done to increase the speed? All ideas are welcome.

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• How to convert a list object to bigdecimal in prepared statement?

  - by user1103504

  I am using prepared statement for bulk insertion of records. Iam iterating a list which contains values and their dataTypes differ. One of the data type is BigDecimal and when i try to set calling preparedstatement, it is throwing null pointer exception. My code int count = 1; for (int j = 0; j < list.size(); j++) { if(list.get(j) instanceof Timestamp) { ps.setTimestamp(count, (Timestamp) list.get(j)); } else if(list.get(j) instanceof java.lang.Character) { ps.setString(count, String.valueOf(list.get(j))); } else if(list.get(j) instanceof java.math.BigDecimal) { ps.setBigDecimal(count, (java.math.BigDecimal)list.get(j)); } else { ps.setObject(count, list.get(j)); } count++; } I tried 2 ways to convert, casting the object and tried to create a new object of type BigDecimal ps.setBigDecimal(count, new BigDecimal(list.get(j).toString)); both donot solve my problem. It is throwing null pointer exception. help is appreciated. Thanks

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• Reflection and Generics get value of property

  - by GigaPr

  Hi i am trying to implement a generic method which allows to output csv file public static void WriteToCsv<T>(List<T> list) where T : new() { const string attachment = "attachment; filename=PersonList.csv"; HttpContext.Current.Response.Clear(); HttpContext.Current.Response.ClearHeaders(); HttpContext.Current.Response.ClearContent(); HttpContext.Current.Response.AddHeader("content-disposition", attachment); HttpContext.Current.Response.ContentType = "text/csv"; HttpContext.Current.Response.AddHeader("Pragma", "public"); bool isFirstRow = true; foreach (T item in list) { //Get public properties PropertyInfo[] propertyInfo = item.GetType().GetProperties(); while (isFirstRow) { WriteColumnName(propertyInfo); isFirstRow = false; } Type type = typeof (T); StringBuilder stringBuilder = new StringBuilder(); foreach (PropertyInfo info in propertyInfo) { //string value ???? I am trying to get the value of the property info for the item object } HttpContext.Current.Response.Write(stringBuilder.ToString()); HttpContext.Current.Response.Write(Environment.NewLine); } HttpContext.Current.Response.End(); } but I am not able to get the value of the object's property Any suggestion? Thanks

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• How to increment the string value during run time without using dr.read() and store it in the oledb

  - by sameer

  Here is my code, everything is working fine the only problem is with the ReadData() method in which i want the string value to be increment i.e AM0001,AM0002,AM0003 etc. This is happening but only one time the value is getting increment to AM0001, the second time the same value i.e AM0001 is getting return. Due to this i am getting a error from oledb because of AM0001 is a primary key field. enter code here: class Jewellery : Connectionstr { string lmcode = null; public string LM_code { get { return lmcode;} set { lmcode = ReadData();} } string mname; public string M_Name { get { return mname; } set { mname = value;} } string desc; public string Desc { get { return desc; } set { desc = value; } } public string ReadData() { string jid = string.Empty; string displayString = string.Empty; String query = "select max(LM_code)from Master_Accounts"; Datamanager.RunExecuteReader(Constr,query); if (string.IsNullOrEmpty(jid)) { jid = "AM0000";//This string value has to increment at every time, but it is getting increment only one time. } int len = jid.Length; string split = jid.Substring(2, len - 2); int num = Convert.ToInt32(split); num++; displayString = jid.Substring(0, 2) + num.ToString("0000"); return displayString; } public void add() { String query ="insert into Master_Accounts values ('" + LM_code + "','" + M_Name + "','" + Desc + "')"; Datamanager.RunExecuteNonQuery(Constr , query); } Any help will be appreciated.

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• Can someone please explain Cursor in android ?

  - by Prabhat

  Can some one explain how the cursor exactly works ? Or the flow of the following part of the code ? I know that this is sub activity and all but I did not understand how Cursor works exactly. final Uri data = Uri.parse("content://contacts/people/"); final Cursor c = managedQuery(data, null, null, null, null); String[] from = new String[] { People.NAME }; int[] to = new int[] { R.id.itemTextView }; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,R.layout.listitemlayout, c, from, to); ListView lv = (ListView) findViewById(R.id.contactListView); lv.setAdapter(adapter); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int pos, long id) { c.moveToPosition(pos); int rowId = c.getInt(c.getColumnIndexOrThrow("_id")); Uri outURI = Uri.parse(data.toString() + rowId); Intent outData = new Intent(); outData.setData(outURI); setResult(Activity.RESULT_OK, outData); finish(); } }); Thanks.

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• Servlet that starts a thread only once for every visitor

  - by user858749

  Hey I want to implement a Java Servlet that starts a thread only once for every single user. Even on refresh it should not start again. My last approach brought me some trouble so no code^^. Any Suggestions for the layout of the servlet? public class LoaderServlet extends HttpServlet { // The thread to load the needed information private LoaderThread loader; // The last.fm account private String lfmaccount; public LoaderServlet() { super(); lfmaccount = ""; } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (loader != null) { response.setContentType("text/plain"); response.setHeader("Cache-Control", "no-cache"); PrintWriter out = response.getWriter(); out.write(loader.getStatus()); out.flush(); out.close(); } else { loader = new LoaderThread(lfmaccount); loader.start(); request.getRequestDispatcher("WEB-INF/pages/loader.jsp").forward( request, response); } } @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (lfmaccount.isEmpty()) { lfmaccount = request.getSession().getAttribute("lfmUser") .toString(); } request.getRequestDispatcher("WEB-INF/pages/loader.jsp").forward( request, response); } } The jsp uses ajax to regularly post to the servlet and get the status. The thread just runs like 3 minutes, crawling some last.fm data.

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• How do I format a Uri when binding an Image in Silverlight?

  - by Scott

  I haven't been able to find an answer to this. I have a database that has image paths in it ("images/myimage.jpg"). These images exist on my asp.net site which is also where I host the SL. I want to bind these images to my ListBox control so that the image displays. I have read that since I have a string value, "images/myimage.jpg", that I need to convert it to a BitMap image. I have done this: the xaml: <Image Source="{Binding ImageFile, Converter={StaticResource ImageConverter}}"/> the ImageConverter class: public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { try { Uri source= new Uri(value.ToString()); return new BitmapImage(source); } catch(Exception ex) { return new BitmapImage(); } } I get an error when creating the Uri, "The Format of the URI could not be determined". What am I doing wrong? If I create a Uri that looks like this: http://localhost:49723/images/myimage.jpg, it works just fine. Why doesn't just "images/myimage.jpg" work?

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