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• Error converting JSON to .Net object in asp.net

  - by Vinni

  Hello Guys, I am unable to convert JSON string to .net object in asp.net. I am sending JSON string from client to server using hidden field (by keeping the JSON object.Tostring() in hidden field and reading the hidden field value in code behind file) Json string/ Object: [[{"OfferId":"1","OrderValue":"11","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"11","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"11","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"2","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"2","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"67","HostingTypeID":"3"}, {"OfferId":"1","OrderValue":"67","HostingTypeID":"3"}], [{"OfferId":"1","OrderValue":"99","HostingTypeID":"6"}], [{"OfferId":"1","OrderValue":"10","HostingTypeID":"8"}]] .Net Object public class JsonFeaturedOffer { public string OfferId { get; set; } public string OrderValue { get; set; } public string HostingTypeID { get; set; } } Converstion code in code behind file byte[] byteArray = Encoding.ASCII.GetBytes(HdnJsonData.Value); MemoryStream stream = new MemoryStream(byteArray); DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(JsonFeaturedOffer)); object result= serializer.ReadObject(stream); JsonFeaturedOffer jsonObj = result as JsonFeaturedOffer; While converting i am getting following error: Expecting element 'root' from namespace ''.. Encountered 'None' with name '', namespace ''.

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• How to make Delphi Prism indexed properties visible to C# when properties are not default

  - by Arcturus

  I have several Delphi Prism classes with indexed properties that I use a lot on my C# web applications (we are migrating a big Delphi Win32 system to ASP.Net). My problem is that it seems that C# can't see the indexed properties if they aren't the default properties of their classes. Maybe I'm doing something wrong, but I'm completely lost. I know that this question looks a lot like a bug report, but I need to know if someone else knows how to solve this before I report a bug. If I have a class like this: TMyClass = public class private ... method get_IndexedBool(index: Integer): boolean; method set_IndexedBool(index: Integer; value: boolean); public property IndexedBool[index: Integer]: boolean read get_IndexedBool write set_IndexedBool; default; // make IndexedBool the default property end; I can use this class in C# like this: var myObj = new TMyClass(); myObj[0] = true; However, if TMyClass is defined like this: TMyClass = public class private ... method get_IndexedBool(index: Integer): boolean; method set_IndexedBool(index: Integer; value: boolean); public property IndexedBool[index: Integer]: boolean read get_IndexedBool write set_IndexedBool; // IndexedBool is not the default property anymore end; Then the IndexedBool property becomes invisible in C#. The only way I can use it is doing this: var myObj = new TMyClass(); myObj.set_IndexedBool(0, true); I don't know if I'm missing something, but I can't see the IndexedBool property if I remove the default in the property declaration. Besides that, I'm pretty sure that it is wrong to have direct access to a private method of a class instance. Any ideas?

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• httpModules not working on iis7

  - by roncansan

  Hi, I have the following module public class LowerCaseRequest : IHttpModule { public void Init(HttpApplication context) { context.BeginRequest += new EventHandler(this.OnBeginRequest); } public void Dispose() { } public void OnBeginRequest(Object s, EventArgs e) { HttpApplication app = (HttpApplication)s; if (app.Context.Request.Url.ToString().ToLower().EndsWith(".aspx")) { if (app.Context.Request.Url.ToString() != app.Context.Request.Url.ToString().ToLower()) { HttpResponse response = app.Context.Response; response.StatusCode = (int)HttpStatusCode.MovedPermanently; response.Status = "301 Moved Permanently"; response.RedirectLocation = app.Context.Request.Url.ToString().ToLower(); response.SuppressContent = true; response.End(); } if (!app.Context.Request.Url.ToString().StartsWith(@"http://zeeprico.com")) { HttpResponse response = app.Context.Response; response.StatusCode = (int)HttpStatusCode.MovedPermanently; response.Status = "301 Moved Permanently"; response.RedirectLocation = app.Context.Request.Url.ToString().ToLower().Replace(@"http://zeeprico.com", @"http://www.zeeprico.com"); response.SuppressContent = true; response.End(); } } } } the web.config looks like <system.web> <httpModules> <remove name="WindowsAuthentication" /> <remove name="PassportAuthentication" /> <remove name="AnonymousIdentification" /> <remove name="UrlAuthorization" /> <remove name="FileAuthorization" /> <add name="LowerCaseRequest" type="LowerCaseRequest" /> <add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule, Intelligencia.UrlRewriter" /> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> </httpModules> </system.web> It works grate on my PC running XP and IIS 5.1 but on my webserver running IIS7 and WS 2008 dosn't works, please help I don't know how to work this out. Thanks

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• .NET Remoting Exception not handled Client-Side

  - by DanJo519

  I checked the rest of the remoting questions, and this specific case did not seem to be addressed. I have a .NET Remoting server/client set up. On the server side I have an object with a method that can throw an exception, and a client which will try to call that method. Server: public bool MyEquals(Guid myGuid, string a, string b) { if (CheckAuthentication(myGuid)) { logger.Debug("Request for \"" + a + "\".Equals(\"" + b + "\")"); return a.Equals(b); } else { throw new AuthenticationException(UserRegistryService.USER_NOT_REGISTERED_EXCEPTION_TEXT); } } Client: try { bool result = RemotedObject.MyEquals(myGuid, "cat", "dog"); } catch (Services.Exceptions.AuthenticationException e) { Console.WriteLine("You do not have permission to execute that action"); } When I call MyEquals with a Guid which causes CheckAuthentication to return false, .NET tries to throw the exception and says the AuthenticationException was unhandled. This happens server side. The exception is never marshaled over to the client-side, and I cannot figure out why. All of the questions I have looked at address the issue of an exception being handled client-side, but it isn't the custom exception but a base type. In my case, I can't even get any exception to cross the remoting boundary to the client. Here is a copy of AuthenticationException. It is in the shared library between both server and client. [Serializable] public class AuthenticationException : ApplicationException, ISerializable { public AuthenticationException(string message) : base(message) { } public AuthenticationException(SerializationInfo info, StreamingContext context) : base(info, context) { } #region ISerializable Members void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { base.GetObjectData(info, context); } #endregion }

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• Failed sending bytes array to JAX-WS web service on Axis

  - by user304309

  Hi I have made a small example to show my problem. Here is my web-service: package service; import javax.jws.WebMethod; import javax.jws.WebService; @WebService public class BytesService { @WebMethod public String redirectString(String string){ return string+" - is what you sended"; } @WebMethod public byte[] redirectBytes(byte[] bytes) { System.out.println("### redirectBytes"); System.out.println("### bytes lenght:" + bytes.length); System.out.println("### message" + new String(bytes)); return bytes; } @WebMethod public byte[] genBytes() { byte[] bytes = "Hello".getBytes(); return bytes; } } I pack it in jar file and store in "axis2-1.5.1/repository/servicejars" folder. Then I generate client Proxy using Eclipse for EE default utils. And use it in my code in the following way: BytesService service = new BytesServiceProxy(); System.out.println("Redirect string"); System.out.println(service.redirectString("Hello")); System.out.println("Redirect bytes"); byte[] param = { (byte)21, (byte)22, (byte)23 }; System.out.println(param.length); param = service.redirectBytes(param); System.out.println(param.length); System.out.println("Gen bytes"); param = service.genBytes(); System.out.println(param.length); And here is what my client prints: Redirect string Hello - is what you sended Redirect bytes 3 0 Gen bytes 5 And on server I have: ### redirectBytes ### bytes lenght:0 ### message So byte array can normally be transfered from service, but is not accepted from the client. And it works fine with strings. Now I use Base64Encoder, but I dislike this solution.

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• Really slow obtaining font metrics.

  - by Artur

  So the problem I have is that I start my application by displaying a simple menu. To size and align the text correctly I need to obtain font metrics and I cannot find a way to do it quickly. I tested my program and it looks like whatever method I use to obtain font metrics the first call takes over 500 milliseconds!? Because of it the time it takes to start-up my application is much longer than necessary. I don't know if it is platform specific or not, but just in case, I'm using Mac OS 10.6.2 on MacBook Pro (hardware isn't an issue here). If you know a way of obtaining font metrics quicker please help. I tried these 3 methods for obtaining the font metrics and the first call is always very slow, no matter which method I choose. import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.font.FontRenderContext; import java.awt.font.LineMetrics; import javax.swing.JFrame; public class FontMetricsTest extends JFrame { public FontMetricsTest() { setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g; Font font = new Font("Dialog", Font.BOLD, 10); long start = System.currentTimeMillis(); FontMetrics fontMetrics = g2.getFontMetrics(font); // LineMetrics fontMetrics1 = // font.getLineMetrics("X", new FontRenderContext(null, false, false)); // FontMetrics fontMetrics2 = g.getFontMetrics(); long end = System.currentTimeMillis(); System.out.println(end - start); g2.setFont(font); } public static void main(String[] args) { new FontMetricsTest(); } }

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• Passing an array argument from Excel VBA to a WCF service

  - by PrgTrdr

  I'm trying to pass an array as an argument to my WCF service. To test this using Damian's sample code, I modified GetData it to try to pass an array of ints instead of a single int as an argument: using System; using System.ServiceModel; namespace WcfService1 { [ServiceContract] public interface IService1 { [OperationContract] string GetData(int[] value); [OperationContract] object[] GetSomeObjects(); } } using System; namespace WcfService1 { public class Service1 : IService1 { public string GetData(int[] value) { return string.Format("You entered: {0}", value[0]); } public object[] GetSomeObjects() { return new object[] { "String", 123, 44.55, DateTime.Now }; } } } Excel VBA code: Dim addr As String addr = "service:mexAddress=""net.tcp://localhost:7891/Test/WcfService1/Service1/Mex""," addr = addr + "address=""net.tcp://localhost:7891/Test/WcfService1/Service1/""," addr = addr + "contract=""IService1"", contractNamespace=""http://tempuri.org/""," addr = addr + "binding=""NetTcpBinding_IService1"", bindingNamespace=""http://tempuri.org/""" Dim service1 As Object Set service1 = GetObject(addr) Dim Sectors( 0 to 2 ) as Integer Sectors(0) = 10 MsgBox service1.GetData(Sectors) This code works fine with the WCF Test Client, but when I try to use it from Excel, I have this problem. When Excel gets to the service1.GetData call, it reports the following error: Run-time error '-2147467261 (80004003)' Automation error Invalid Pointer It looks like there is some incompatibility between the interface specification and the VBA call. Have you ever tried to pass an array from VBA into WCF? Am I doing something wrong or is this not supported using the Service moniker?

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• ReflectionTypeLoadException with Silverlight serialization attributes

  - by RPS

  Hi all, I´m trying to inspect the types in a silverlight 4 assembly from a .NET 3.5 application. I have loaded the silverlight assembly with a Assembly.ReflectionOnlyLoadFrom sentence. contractsAssembly = Assembly.ReflectionOnlyLoadFrom(contractsAssemblyPath); When the .NET application tries to perform a call to GetTypes(), it throws a ReflectionTypeLoadException. Type[] types = contractsAssembly.GetTypes(); The LoaderExceptions property in the ReflectionTypeLoadException contains a list of exceptions, all of them regarding a problem loading a type that has serialization attributes. Type 'XXXX' in assembly 'YYYY' has method 'OnSerializing' with an incorrect signature for the serialization attribute that it is decorated with. The type XXXX has the following definitions in it: [System.Runtime.Serialization.OnSerializing] public void OnSerializing(System.Runtime.Serialization.StreamingContext context) [System.Runtime.Serialization.OnSerialized] public void OnSerialized(System.Runtime.Serialization.StreamingContext context) [System.Runtime.Serialization.OnDeserializing] public void OnDeserializing(System.Runtime.Serialization.StreamingContext context) [System.Runtime.Serialization.OnDeserialized] public void OnDeserialized(System.Runtime.Serialization.StreamingContext context) I have tried changing the method signature to internal or private, but with no luck. When I perform a GetTypes() call in a silverlight application that inspects this assembly I have no problems, so I thought that this was due to an incompatibility between .NET Framework and Silverlight. However, I see that .NET tools such as Reflector can inspect this Silverlight assembly, so there is a way to inspect Silverlight assemblies with serialization attributes from a .NET applciation. Could someone shed me some light on this? Many thanks in advance. Jose Antonio

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• Detecting validation errors in Silverlight 4

  - by jkohlhepp

  I'm using the new Silverlight 4 support for IDataErrorInfo. So I have a POCO object that has implemented the interface, and when a validation rule fires the Silverlight UI correctly shows the error. So that is all working fine. The POCO object looks like this: public class SomeDomainClass : IDataErrorInfo { public string SomeString { get; set; } public string Error { get { return String.Empty; } } public string this[string columnName] { get { if (columnName == "SomeString" && PolicyNumber.Contains("%")) return "SomeString cannot contain '%'. You'll ruin everything!!!"; return String.Empty; } } } However, I want to be able to detect whether or not there are any errors on the page. For example if I have a Save button and I want to disable it if there are errors, or display a message or something. What is the best way to detect if there are existing validation errors on the page? Is there a facility for this based around the IDataErrorInfo support in Silverlight? Or do I have to track it in the domain model myself?

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• C#: How to resolve this circular dependency?

  - by Rosarch

  I have a circular dependency in my code, and I'm not sure how to resolve it. I am developing a game. A NPC has three components, responsible for thinking, sensing, and acting. These components need access to the NPC controller to get access to its model, but the controller needs these components to do anything. Thus, both take each other as arguments in their constructors. ISenseNPC sense = new DefaultSenseNPC(controller, worldQueryEngine); IThinkNPC think = new DefaultThinkNPC(sense); IActNPC act = new DefaultActNPC(combatEngine, sense, controller); controller = new ControllerNPC(act, think); (The above example has the parameter simplified a bit.) Without act and think, controller can't do anything, so I don't want to allow it to be initialized without them. The reverse is basically true as well. What should I do? ControllerNPC using think and act to update its state in the world: public class ControllerNPC { // ... public override void Update(long tick) { // ... act.UpdateFromBehavior(CurrentBehavior, tick); CurrentBehavior = think.TransitionState(CurrentBehavior, tick); } // ... } DefaultSenseNPC using controller to determine if it's colliding with anything: public class DefaultSenseNPC { // ... public bool IsCollidingWithTarget() { return worldQuery.IsColliding(controller, model.Target); } // ... }

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• DataContractSerializer does not properly deserialize, values for methods in object are missing

  - by sachin

  My SomeClass [Serializable] [DataContract(Namespace = "")] public class SomeClass { [DataMember] public string FirstName { get; set; } [DataMember] public string LastName { get; set; } [DataMember] private IDictionary<long, string> customValues; public IDictionary<long, string> CustomValues { get { return customValues; } set { customValues = value; } } } My XML File: <?xml version="1.0" encoding="UTF-8"?> <SomeClass> <FirstName>John</FirstName> <LastName>Smith</LastName> <CustomValues> <Value1>One</Value1> <Value2>Two</Value2> </CustomValues > </SomeClass> But my problem is for the class, i am only getting some of the data for my methods when i deserialize. var xmlRoot = XElement.Load(new StreamReader( filterContext.HttpContext.Request.InputStream, filterContext.HttpContext.Request.ContentEncoding)); XmlDictionaryReader reader = XmlDictionaryReader.CreateDictionaryReader(xmlRoot.CreateReader()); DataContractSerializer ser = new DataContractSerializer(typeof(SomeClass)); //Deserialize the data and read it from the instance. SomeClass someClass = (SomeClass)ser.ReadObject(reader, true); So when I check "someClass", FirstName will have the value john, But the LastName will be null. Mystery is how can i get some of the data and not all of the data for the class. So DataContractSerializer is not pulling up all the data from xml when deserializing. Am i doing something wrong. Any help is appreciated. Thanks in advance. Let me know if anyone has the same problem or any one has solution

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• Binding property to Silverlight dependency property independent of DataContext

  - by Simon_Weaver

  I'm trying to make an Address control that has an IsReadOnly property, which will make every TextBox inside read only when set to true. <my:AddressControl Grid.Column="1" Margin="5" IsReadOnly="True"/> I've managed to do this just fine with a dependency property and it works. Here's a simple class with the dependency property declared : public partial class AddressControl : UserControl { public AddressControl() { InitializeComponent(); this.DataContext = this; } public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(AddressControl), null); public bool IsReadOnly { get { return (bool)GetValue(IsReadOnlyProperty); } set { SetValue(IsReadOnlyProperty, value); } } } In the XAML for this codebehind file I have a Textbox for each address line: <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding City, Mode=TwoWay}"/> <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding State, Mode=TwoWay}"/> <TextBox IsReadOnly="{Binding IsReadOnly}" Text="{Binding Zip, Mode=TwoWay}"/> Like i said this works just fine. The problem is that the Address control itself is bound to its parent object (I have several addresses I am binding). <my:AddressControl DataContext="{Binding ShippingAddress, Mode=TwoWay}" IsReadOnly="True"> <my:AddressControl DataContext="{Binding BillingAddress, Mode=TwoWay}" IsReadOnly="True"> The problem is that as soon as I set DataContext to something other than 'this' then the binding for IsReadOnly breaks. Not surprising because its looking for IsReadOnly on the Address data entity and it doesn't exist or belong there. I've tried just about every combination of binding attributes to get IsReadOnly to bind to the AddressControl obejct but can't get it working. I've tried things like this, but I can't get IsReadOnly to bind independently to the AddressControl property instead of its DataContext. <TextBox IsReadOnly="{Binding RelativeSource={RelativeSource Self}, Path=IsReadOnlyProperty}" Text="{Binding City, Mode=TwoWay}" /> I think I'm pretty close. What am I doing wrong?

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• Error in simple Java application

  - by mrblah

  Just playing around with java trying to learn it etc. Here is my code so far, using HtmlUnit. package hsspider; import com.gargoylesoftware.htmlunit.WebClient; /** * @author */ public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { System.out.println("starting "); Spider spider = new Spider(); spider.Test(); } } package hsspider; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.html.HtmlPage; /** * @author */ public class Spider { public void Test() throws Exception { final WebClient webClient = new WebClient(); final HtmlPage page = webClient.getPage("http://www.google.com"); System.out.println(page.getTitleText()); } } I am using Netbeans. I can't seem to figure out what the problem is, why doesn't it compile? The error: C:\Users\mrblah\.netbeans\6.8\var\cache\executor-snippets\run.xml:45: Cancelled by user. BUILD FAILED (total time: 0 seconds) The row in the xml is: <translate-classpath classpath="${classpath}" targetProperty="classpath-translated" />

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• How to get Cookies using HttpClient

  - by Sunil

  Hello I am using HttpClient to get Cookies but I am unable find any cookies.My Code is given below public class LoginTab { private Cookie[] cookies; HttpClient httpClient; HttpState httpState; HashMap postData; public LoginTab() { httpClient = new HttpClient(); httpState = new HttpState(); httpClient.getHttpConnectionManager(). getParams().setConnectionTimeout(300000); httpClient.setState(httpState); // RFC 2101 cookie management spec is used per default // to parse, validate, format & match cookies httpClient.getParams().setCookiePolicy(CookiePolicy.RFC_2109); postData= new HashMap(); } public String getMethod(String url) { GetMethod getMethod = new GetMethod(url); String pageSoure=""; try{ httpClient.executeMethod(getMethod); pageSoure=getMethod.getResponseBodyAsString(); extractUsefulPostData(pageSoure, postData); getMethod.releaseConnection(); }catch(Exception ex) { ex.printStackTrace(); } return pageSoure; } public static void main(String[]arg) { LoginTab loginTab= new LoginTab(); System.out.println(loginTab.getMethod("http://tab.com.au/")); Cookie [] cookies=loginTab.httpState.getCookies(); System.out.println(cookies.length); for(int i=0;i<cookies.length;i++) System.out.println(cookies[i]); } } Please suggest me where is the mistake. Thanks in advance

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• How to get Cookies using HttpClient

  - by Sunil

  Hello I am using HttpClient to get Cookies but I am unable find any cookies.My Code is given below public class LoginTab { private Cookie[] cookies; HttpClient httpClient; HttpState httpState; HashMap postData; public LoginTab() { httpClient = new HttpClient(); httpState = new HttpState(); httpClient.getHttpConnectionManager(). getParams().setConnectionTimeout(300000); httpClient.setState(httpState); // RFC 2101 cookie management spec is used per default // to parse, validate, format & match cookies httpClient.getParams().setCookiePolicy(CookiePolicy.RFC_2109); postData= new HashMap(); } public String getMethod(String url) { GetMethod getMethod = new GetMethod(url); String pageSoure=""; try{ httpClient.executeMethod(getMethod); pageSoure=getMethod.getResponseBodyAsString(); extractUsefulPostData(pageSoure, postData); getMethod.releaseConnection(); }catch(Exception ex) { ex.printStackTrace(); } return pageSoure; } public static void main(String[]arg) { LoginTab loginTab= new LoginTab(); System.out.println(loginTab.getMethod("http://tab.com.au/")); Cookie [] cookies=loginTab.httpState.getCookies(); System.out.println(cookies.length); for(int i=0;i<cookies.length;i++) System.out.println(cookies[i]); } } Please suggest me where is the mistake. Thanks in advance

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• How can I create a generaic ValidationAttribute in C#?

  - by sabbour

  I'm trying to create a UniqueAttribute using the System.ComponentModel.DataAnnotations.ValidationAttribute I want this to be generic as in I could pass the Linq DataContext, the table name, the field and validate if the incoming value is unique or not. Here is a non-compilable code fragment that I'm stuck at right now: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ComponentModel.DataAnnotations; using System.Data.Linq; using System.ComponentModel; namespace LinkDev.Innovation.Miscellaneous.Validation.Attributes { public class UniqueAttribute : ValidationAttribute { public string Field { get; set; } public override bool IsValid(object value) { string str = (string)value; if (String.IsNullOrEmpty(str)) return true; // this is where I'm stuck return (!Table.Where(entity => entity.Field.Equals(str)).Any()); } } } I should be using this in my model as follows: [Required] [StringLength(10)] [Unique(new DataContext(),"Groups","name")] public string name { get; set; }

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• ProgressDialog not working in external AsyncTask

  - by eric

  I'm beginning to think that to get a ProgressDialog to work the AsyncTask has to be an inner class within an Activity class. True? I have an activity the uses a database to manipulate information. If the database is populated all is well. If it is not populated then I need to download information from a website, populate the database, then access the populated database to complete the Views in onCreate. Problem is without some means to determine when the AsyncTask thread has finished populating the database, I get the following Force Close error message: Sorry! The application has stopped unexpectedly. I click on the Force Close button, the background AsyncTask thread continues to work, the database gets populated, and everything works ok. I need to get rid of that error message and need some help on how to do this. Here's some psuedo code: public class ViewStuff extends Activity { onCreate { if(database is populated) do_stuff else { FillDB task = null; if(task == null || task.getStatus().equals(AsyncTask.Status.FINISHED)) { task = new FillDB(context); task.execute(null); } } continue with onCreate using information from database to properly display } // end onCreate } // end class In a separate file: public class FillDB extends AsyncTask<Void, Void, Void> { private Context context; public FillDB (Context c) //pass the context in the constructor { context = c; } public void filldb () { doInBackground(); } @Override protected void onPreExecute() { ProgressDialog progressDialog = new ProgressDialog(context); //crashes with the following line progressDialog.show(context, "Working..", "Retrieving info"); } @Override protected Void doInBackground(Void... params) { // TODO Auto-generated method stub try etc etc etc } } What am I doing wrong?

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• Custom ViewModel with MVC 2 Strongly Typed HTML Helpers return null object on Create ?

  - by Barbaros Alp

  Hi, I am having a trouble while trying to create an entity with a custom view modeled create form. Below is my custom view model for Category Creation form. public class CategoryFormViewModel { public CategoryFormViewModel(Category category, string actionTitle) { Category = category; ActionTitle = actionTitle; } public Category Category { get; private set; } public string ActionTitle { get; private set; } } and this is my user control where the UI is <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<CategoryFormViewModel>" %> <h2> <span><%= Html.Encode(Model.ActionTitle) %></span> </h2> <%=Html.ValidationSummary() %> <% using (Html.BeginForm()) {%> <p> <span class="bold block">Baslik:</span> <%=Html.TextBoxFor(model => Model.Category.Title, new { @class = "width80 txt-base" })%> </p> <p> <span class="bold block">Sira Numarasi:</span> <%=Html.TextBoxFor(model => Model.Category.OrderNo, new { @class = "width10 txt-base" })%> </p> <p> <input type="submit" class="btn-admin cursorPointer" value="Save" /> </p> <% } %> When i click on save button, it doesnt bind the category for me because of i am using custom view model and strongly typed html helpers like that <%=Html.TextBoxFor(model => Model.Category.OrderNo) %> How can i fix this ? Thanks in advance

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• In Java Concurrency In Practice by Brian Goetz, why is the Memoizer class not annotated with @ThreadSafe?

  - by dig_dug

  Java Concurrency In Practice by Brian Goetz provides an example of a efficient scalable cache for concurrent use. The final version of the example showing the implementation for class Memoizer (pg 108) shows such a cache. I am wondering why the class is not annotated with @ThreadSafe? The client, class Factorizer, of the cache is properly annotated with @ThreadSafe. The appendix states that if a class is not annotated with either @ThreadSafe or @Immutable that it should be assumed that it isn't thread safe. Memoizer seems thread-safe though. Here is the code for Memoizer: public class Memoizer<A, V> implements Computable<A, V> { private final ConcurrentMap<A, Future<V>> cache = new ConcurrentHashMap<A, Future<V>>(); private final Computable<A, V> c; public Memoizer(Computable<A, V> c) { this.c = c; } public V compute(final A arg) throws InterruptedException { while (true) { Future<V> f = cache.get(arg); if (f == null) { Callable<V> eval = new Callable<V>() { public V call() throws InterruptedException { return c.compute(arg); } }; FutureTask<V> ft = new FutureTask<V>(eval); f = cache.putIfAbsent(arg, ft); if (f == null) { f = ft; ft.run(); } } try { return f.get(); } catch (CancellationException e) { cache.remove(arg, f); } catch (ExecutionException e) { throw launderThrowable(e.getCause()); } } } }

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• HTTPWebResponse returning no content

  - by Richard Yale

  Our company works with another company called iMatrix and they have an API for creating our own forms. They have confirmed that our request is hitting their servers but a response is supposed to come back in 1 of a few ways determined by a parameter. I'm getting a 200 OK response back but no content and a content-length of 0 in the response header. here is the url: https://secure4.office2office.com/designcenter/api/imx_api_call.asp I'm using this class: namespace WebSumit { public enum MethodType { POST = 0, GET = 1 } public class WebSumitter { public WebSumitter() { } public string Submit(string URL, Dictionary<string, string> Parameters, MethodType Method) { StringBuilder _Content = new StringBuilder(); string _ParametersString = ""; // Prepare Parameters String foreach (KeyValuePair<string, string> _Parameter in Parameters) { _ParametersString = _ParametersString + (_ParametersString != "" ? "&" : "") + string.Format("{0}={1}", _Parameter.Key, _Parameter.Value); } // Initialize Web Request HttpWebRequest _Request = (HttpWebRequest)WebRequest.Create(URL); // Request Method _Request.Method = Method == MethodType.POST ? "POST" : (Method == MethodType.GET ? "GET" : ""); _Request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Win32)"; // Send Request using (StreamWriter _Writer = new StreamWriter(_Request.GetRequestStream(), Encoding.UTF8)) { _Writer.Write(_ParametersString); } // Initialize Web Response HttpWebResponse _Response = (HttpWebResponse)_Request.GetResponse(); // Get Response using (StreamReader _Reader = new StreamReader(_Response.GetResponseStream(), Encoding.UTF8)) { _Content.Append(_Reader.ReadToEnd()); } return _Content.ToString(); } } } I cannot post the actual parameters because they are to the live system, but can you look at this code and see if there is anything that is missing? Thanks!

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• Client WCF DataContract has empty/null values from service

  - by Matt

  I have a simple WCF service that returns the time from the server. I've confirmed that data is being sent by checking with Fiddler. Here's the result object xml that my service sends. <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body> <GetTimeResponse xmlns="http://tempuri.org/"> <GetTimeResult xmlns:a="http://schemas.datacontract.org/2004/07/TestService.DataObjects" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"> <a:theTime>2010-03-26T09:14:38.066372-06:00</a:theTime> </GetTimeResult> </GetTimeResponse> </s:Body> </s:Envelope> So, as far as I can tell, there's nothing wrong on the server end. It's receiving requests and returning results. But on my silverlight client, all the members of the returned object are either null, blank or a default vaule. As you can see the server returns the current date and time. But in silverlight, theTime property on my object is set to 1/1/0001 12:00 AM (default value). Sooo methinks that the DataContracts do not match up between the server and the silverlight client. Here's the DataContract for the server [DataContract] public class Time { [DataMember] public DateTime theTime { get; set; } } Incredibly simple. And here's the datacontract on my silverlight client. [DataContract] public class Time { [DataMember] public DateTime theTime { get; set; } } Literally the only difference is the namespaces within the application. But still the values being returned are null, empty or a .NET default. Thanks for you help!

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• Validate MVC 2 form using Data annotations and Linq-to-SQL, before the model binder kicks in (with D

  - by Stefanvds

  I'm using linq to SQL and MVC2 with data annotations and I'm having some problems on validation of some types. For example: [DisplayName("Geplande sessies")] [PositiefGeheelGetal(ErrorMessage = "Ongeldige ingave. Positief geheel getal verwacht")] public string Proj_GeplandeSessies { get; set; } This is an integer, and I'm validating to get a positive number from the form. public class PositiefGeheelGetalAttribute : RegularExpressionAttribute { public PositiefGeheelGetalAttribute() : base(@"\d{1,7}") { } } Now the problem is that when I write text in the input, I don't get to see THIS error, but I get the errormessage from the modelbinder saying "The value 'Tomorrow' is not valid for Geplande sessies." The code in the controller: [HttpPost] public ActionResult Create(Projecten p) { if (ModelState.IsValid) { _db.Projectens.InsertOnSubmit(p); _db.SubmitChanges(); return RedirectToAction("Index"); } else { SelectList s = new SelectList(_db.Verbonds, "Verb_ID", "Verb_Naam"); ViewData["Verbonden"] = s; } return View(); } What I want is being able to run the Data Annotations before the Model binder, but that sounds pretty much impossible. What I really want is that my self-written error messages show up on the screen. I have the same problem with a DateTime, which i want the users to write in the specific form 'dd/MM/yyyy' and i have a regex for that. but again, by the time the data-annotations do their job, all i get is a DateTime Object, and not the original string. So if the input is not a date, the regex does not even run, cos the data annotations just get a null, cos the model binder couldn't make it to a DateTime. Does anyone have an idea how to make this work?

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• dotRAS Disconnected State not triggered

  - by JD

  Can someone give me a heads up... I'm trying to use the dotRAS .NET control, and this code to change the value of internetConnected (boolean) using an event handler... But it seems that the state RasConnectionState.Disconnected is not triggered by dotRAS hangup().. Any ideas? Am I doing it totally wrong... or have I managed to find a bug? public class USBModem { // private vars private RasDialer dialer = new RasDialer(); private bool internetConnected = false; /// <summary> /// Default constructor for USBModem /// </summary> public USBModem() { // Add Events for dialer dialer.StateChanged += new EventHandler<StateChangedEventArgs>(dialer_StateChanged); } void dialer_StateChanged(object sender, StateChangedEventArgs e) { // Handle state changes here switch (e.State) { case RasConnectionState.Connected: internetConnected = true; Console.WriteLine(e.State.ToString()); break; case RasConnectionState.Disconnected: internetConnected = false; Console.WriteLine(e.State.ToString()); break; default: Console.WriteLine("INFO -> Unhandled state: " + e.State.ToString()); break; } } public void ConnectInternet(string connectionName) { // Dial dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers); dialer.EntryName = connectionName; dialer.DialAsync(); } public void DisconnectInternet() { foreach (RasConnection connection in dialer.GetActiveConnections()) { connection.HangUp(); } } }

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• C# rounding DateTime objects

  - by grenade

  I want to round dates/times to the nearest interval for a charting application. I'd like an extension method signature like follows so that the rounding can be acheived for any level of accuracy: static DateTime Round(this DateTime date, TimeSpan span); The idea is that if I pass in a timespan of ten minutes, it will round to the nearest ten minute interval. I can't get my head around the implementation and am hoping one of you will have written or used something similar before. I think either a floor, ceiling or nearest implementation is fine. Any ideas? Edit: Thanks to @tvanfosson & @ShuggyCoUk, the implementation looks like this: public static class DateExtensions { public static DateTime Round(this DateTime date, TimeSpan span) { long ticks = (date.Ticks / span.Ticks) + (span.Ticks / 2) + 1; return new DateTime(ticks * span.Ticks); } public static DateTime Floor(this DateTime date, TimeSpan span) { long ticks = (date.Ticks / span.Ticks); return new DateTime(ticks * span.Ticks); } public static DateTime Ceil(this DateTime date, TimeSpan span) { long ticks = (date.Ticks + span.Ticks - 1) / span.Ticks; return new DateTime(ticks * span.Ticks); } } And is called like so: DateTime nearestHour = DateTime.Now.Round(new TimeSpan(1,0,0)); DateTime minuteCeiling = DateTime.Now.Ceil(new TimeSpan(0,1,0)); DateTime weekFloor = DateTime.Now.Floor(new TimeSpan(7,0,0,0)); ... Cheers!

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• Using IOC in a remoting scenario

  - by Christoph

  I'm struggling with getting IOC to work in a remoting scenario. I have my application server set up to publish Services (SingleCall) which are configured via XML. This works just like this as we all know: RemotingConfiguration.Configure(ConfigFile, true); lets say my service looks like that (pseudocode) public class TourService : ITourService { IRepository _repository; public TourService() { _repository = new SqlServerRepository(); } } But what I rather would like to have sure looks like this: public class TourService : ITourService { IRepository _repository; public TourService(IRepository repository) { _repository = repository; } } On the client side we do something like that (pseudocode again): (ITourService)Activator.GetObject(ITourService, tcp://server/uri); This prompts the server to create a new instance of my TourService class... However this doesn't seem to work out well because the .NET Remoting Infrastructure want's to know the type it should publish but I would rather like to point it to the way how it could retrieve the object it should publish. In other words, route it through the IOC process pipe of - let's say windsor castle - for example. Currently I'm a bit lost on that task...

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