.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

use IErrorHandler to map back to throwing class?

Posted By:      Posted Date: October 18, 2010    Points: 0   Category :WCF

I would like to write an IErrorHandler implementation that lets me map back to the the type of the throwing class.  If I can map back to the type of class that originally threw the exception I could look for a custom error handling attribute that would allow me to customize error handling behavior for the current error.    Is this possible? If so, how do you map back to the class that originally threw the exception?



View Complete Post

More Related Resource Links

Error throwing in Membership class


I want to check the user credentials of asp_net Membership database, for that While using the Membership class it is throwing "Operation is not valid due to the current state of the object".

How to Pass integer value back from get and set class



I am trying to set a integer value in a class from license information, and then get that value passed back to my Program.cs class (e.g. of value 10).

However when I try to return the value to another part of the class (as below) it says 'Cannot implicitly convert type to Manco.Licensing.License'. Also any idea how do I call this class to get this integer value back to Program.cs ie should this be LCheck.Value.days? In this class daysleft is a integer value.

using System;

public class LCheck
private Manco.Licensing.License m_License;
public static int daysleft;
public static int days;

public int Value

int days = daysleft;
return days;


public Manco.Licensing.License License
m_License = value;
daysleft = Convert.ToInt32(m_License.DaysLeft.TotalDays);

return daysleft;



Class Diagrams

Class diagrams show the static structure of the systems. Classes define the properties of the objects which belong to them. These include:

Attributes - (second container) the data properties of the classes including type, default value and constraints.

Creating a Simple Class in C#

The second article in the C# Object-Oriented Programming tutorial describes how classes are created in C# and how behaviour, in the form of publicly visible and private, hidden methods can be added. This demonstrates some of the uses of encapsulation

Static Class for Beginners

In general, the members of a class can be accessed by instance of that class when they are in public, but there comes a situation to access or call members of a class without an instance and this can be achieved by declaring them as static

abstract away the source of the connection string using a class with a static property.

ASP.NET provides a configuration system we can use to keep our applications flexible at runtime. In this article we will examine some tips and best practices for using the configuration system for the best results.

The element of a web.config file is a place to store connection strings, server names, file paths, and other miscellaneous settings needed by an application to perform work. The items inside appSettings are items that need to be configurable depending upon the environment, for instance, any database connection strings will change as you move your application from a testing and staging server into production.

Let's abstract away the source of the connection string using a class with a static property.

MessageQueue Class

This sample demonstrates two way communications using message queuing between a device application and a desktop application. One application sends book order messages to a message queue and another application receives these book orders from the message queue and responds to the device queue that the orders have been processed.

Post back puzzle


Hi, I have a website where the user makes a selection from a combo box and it then fills a couple text boxes with text based upon the selection. I'm sure as you know it could take a second for the text to appear in the text box due to the post back. I know there is no way to make it instantanious, so what I would like to do it fill the text box with somthing like "Loading Info..." so the user does not type in it while the information is loading.

If you would like to see what I mean please go to this page: www.epiclinks.com/create.aspx and mess around with the combo boxes and You'll see what I mean.

What I would like to do is have it do a post back to write "Loading Info..." and then do another post back to fill it in based upon their selection. How would I do this?

I'm up for anything, so if you have a better solution than that please let me know.


How to change the default page base class?


I've tried setting the <pages pageBaseType="DynamicWebPage" /> value in web.config, but when I response.write out the page type, I'm still getting Microsoft.WebPages.WebPage.

I'm simply trying to sub-class WebPage and add some additional functionality such as a dynamic PageData dictionary similar to Phil Haack's dynamic ViewData dictionary.



Can I replace the EntityObject as base-class in Entity Designer 3.5 sp1?


I'm using EF3.5sp1 for a project, and I've been working around many of its problems... as such, my entity partial classes have a lot of logic in them for change-tracking and whatnot.  Obviously, I'd like to factor this logic out into a common base class, but of course all my objects must derive from EntityObject.  Is it possible to tell them to derive from some class of my own invention (which would actually likely derive from EntityObject themselves)?

I'd rather avoid editing the EDMX file unless the changes will be safe on entity-model-update, since I'm still making changes to the database schema in this early state of my project.


Also, is there any good workaround for the fact that the change isn't tracked when you change EntityReference.EntityKey?

Singleton Pattern and Abstract Class


I know what Singleton Pattern means and Abstract class means.

What I wanted to know was how would this apply to real world.

Could anyone give me any good example or simple explanation.

Say I have a simple website, why would I use any of the above if any.

Why would it simplify my architechture.

Thanks in advace. 

How to implement custom HttpContext for each request under class that implements IHTTPHandler


Hello All,

I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.

Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.

After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)

Code is as follows.

    Public Sub ProcessRequest(ByVal context As System.Web.HttpContext) Implements System.Web.IHttpHandler.ProcessRequest
            Dim requestedUrl As String
            Dim targetUrl As String
            Dim urlLength As Integer
            'Save settings which will be used while redirecting to appropriate page
            requestedUrl = context.Request.RawUrl
            If requestedUrl.IndexOf("?") >= 0 Then
                targetUrl = requestedUrl.Substring(0, requestedUrl.IndexOf("?"))
                targetUrl = requestedUrl
            End If
            If targetUrl = Nothing Or targetUrl.Length = 0 Then
                targetUrl = requestedUrl
            End If

Using a GenericHandler as a WebResource inside a Class Library



I hope this is the right place to ask this question.

I'm trying to make a control class library. I want to have a GenericHandler as a WebResource so I could call it from the web project that will use that control.

I need this handler will get parameters from the query string and return JSON data acourding to what it get in the QS.

I know how to create JS and images WebResources, so I tried the same on a generic handler I added to the class library project but all it does is return the source of the handler file and not the result.


Is what I'm trying to do possible? If so, what should I do?


Thank :-)

Using loginName to find ADInfo from an outside class



I wrote a class to pull adinfo and for the life of me I can't seem to figure

out why it says "Invalid Login Name" no matter what I type in. If I leave

it blank it seems to work properly but it doesn't seem to be actually searching

the AD. I'll drop the whole class here, it's being initiated by a button click

on an outside form.


Thanks in Advance for any help Offered,



Imports System.DirectoryServices
Imports Microsoft.VisualBasic
Imports System.String
Imports System.Collections
Imports System.Security.Principal
Imports System.Security.Permissions

Namespace LoginButton
    Public Class LoginButton

        'Class Variables
        Dim UserID As String = Nothing
        Dim DomainDN As String = ConfigurationManager.AppSettings("myConnectionString")
        Dim ADEntry As DirectoryEntry = New DirectoryEntry(DomainDN)
        Dim objSearch As New System.DirectoryServices.DirectorySearcher(ADEntry)
        Dim oResults As DirectoryServices.SearchResultCollection
        Dim oResult As DirectoryServices.SearchResult
        Dim RetArray As New Hashtable
        Dim page As Page = DirectCast(HttpContext.Current.Handler, Page)
        Dim TextLogin = DirectCast(page.FindControl("

Localization not working in class library (composite control)



I have a class library called WEM.portal which used Resource files to localise text in my composite controls.

I store my resource files (eg MyResourceFile1.resx) in App_GlobalResources folder and then refer to them using

MyLabel1.text = My.Resources.MyResourceFile1.MyResourceKey1

This is all working ok until I create seperate files for each language such as MyResourceFile1.FR-fr.resx.

I have implemented this throughout my other web applications but the Class Library doesnt seem to want to work the same way

When I load the page it correctly showes the resourced keys which I have done through the web application BUT the resource keys in the composite controls does not seem to pick up the culture code.

Am I missing something stupid. Ive tried

  • changing the Build Action on the resource file to Content and Custom tool to GlobalResourceProxyGenerator
  • Creating a resourceManager but to no avail


Security negotiation failed because the remote party did not send back a reply in a timely manner. T



Dear All i have created one simple service

like this

namespace WcfService2
        public class Service1 : IService1
        public string ShowEmpName(string strFirstName, string strLastName)
            return strFirstName + strLastName;

after executing in .net command promt i got 2 files

service.cs & output.config

after that i create one class file like this

namespace WcfService2
    public class clientcs

        static void Main(string[] args)
            Service1Client client = new Service1Client();
            string strResult = client.ShowEmpName("Pradeep", "Deokar");

Make sure that the class defined in this code file matches the 'inherits' attribute, and that it e


Here is the page directive for the page that throws the error:

@ Page language="c#" Inherits="University.AspNet.Index" CodeFile="Index.aspx.cs" %>

The code behind file Index.aspx.cs starts like this:

using University.Framework.UI;

namespace University.AspNet

public partial class Index : University.Framework.UI.HomePage

The code behind is extending this HomePage class, which is in turn an extenstion of another class University.Framework.UI.Page, which extends the System.Web.UI.Page class.

Am I misusing the I

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend