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C# Asynchronous Sockets Problem

Posted By:      Posted Date: September 03, 2010    Points: 0   Category :.NET Framework
Dear Programmers, I have some trouble in using Asynchronous Sockets in my application . My C# Window Application Working as Server and several clients to this Server and start data transmitting. Sometimes from a particular  Client i got continues Null Value Client exactly not sending but i m receiving and my application got hang and stop working , What is the problem can any one help me to resolve this problem .   Thanks  JainAmit      

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I want to canceling an asynchronous method.

How can me it?


public IAsyncResult BeginGetAllUsersCount(object sender, EventArgs args, AsyncCallback callback, object state)
       //Canceling asynchronous operation
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   public void EndGetAllUsersCount(IAsyncResult asyncResult)
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Problem with asynchronous call to webservice


Hello people.

I have a website where i call function in a web service. I am calling it asynchronously. The problem is the data which is returned from webservice is not shown in my label.

See here

protected void Page_Load(object sender, EventArgs e)
IAsyncResult asyncResult;

AsyncCallback callback = new AsyncCallback(MyCallBack);
asyncResult = serv.BeginGetImageList(req, callback, null);

private void MyCallBack(System.IAsyncResult asyncResult)

Label1.Text = "TEST";


Very simple but when the page is loaded, the label dont have any text.

Please help.

jQuery $(document).ready() and ASP.NET Ajax asynchronous postback

Many call it the ASP.NET jQuery postback problem, but using the technique below should make it no problem anymore. $(document).ready() isn't called after an asynchronous postback. What this means? You lose the functionality that should be executed within $(document).ready() after an UpdatePanel rendered its contents after an asynchronous postback.

jQuery live() and ASP.NET Ajax asynchronous postback

The issue is that normally $(document).ready() is called when the DOM is ready to be manipulated. But this doens't happen after an ASP.NET Ajax asynch postback occurs.

This means that the initial jQuery bindings won't be automatically available after the asynchronous postback is over. I underline "automatically" here because my last post describes more possibilities, how this issue can be worked around.

Problem to group radio button across gridview rows

In general no one can easily group or make a single selection from radio button list inside gridview rows. There are a lot of way to make a single or unique selection from list. Here i want to share how i can address this problem in the most easiest way. Googling the problem most of the cases i saw the grouping in horizontal way. Thats why i tried to group the radio buttons in vertical manner. Let i have a requirement like below:

Regrading Sharpoint 2010 problem and solutions

We can write your question and problem on this blogger.you get ans.use.

This sharpoint 2010 problem solving threads

Hi friend,

you can use this thread to solving problem and solutions.

Virtual Path Problem


 I get the following error on last line below (working on remote host): 'E:\web\sfcascom\ls_admin/uploads/images/001.JPG' is not a valid virtual path,

Note that the slashes go in different directions

I've tried a number of things but nothing seems to work. Thanks-


Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.Web.UI.WebControls

Imports System.Drawing.Imaging.ImageCodecInfo
Partial Class Protected_imageupload
    Inherits System.Web.UI.Page
    Private Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
        ' Initialize variables
        Dim sSavePath As String
        Dim sThumbExtension As String
        Dim intThumbWidth As Integer
        Dim intThumbHeight As Integer
        Dim sFilename As String = ""
        ' Set constant values
        'sSavePath = "images/"
        sSavePath = Server.MapPath("~/") + "ls_admin/uploads/images/"

        sThumbExtension = "_thumb"
        intThumbWidth = 160
        intThumbHeight = 120

        ' If file field isn?t empty
        If FilUpload.PostedFile IsNot Nothing Then
            ' Check file size (mustn?t be 0)
            Dim myFile As Http

Strange Photo upload problem


I'm working project it's live on shared hosting

we'er uploading photos to a file on the server everything works fine the photo is resized renamed and sent to the folder

the upload page returns the thumbnail and the full size photo it's there all the photos have to be approved by an admin

twice now after they have been approved they disapear I checked the folder they are not there could there be anywhere

on the server they could get hung up before they go into the folder I have it setup so when you delete the data base entry it deletes the photo from the folder othe than that you need to open the folder and delete the photo this has hapened twice now I tried to recreate it with no luck

thaks for your help in advance

ASP.Net Caching problem ??


I'm having a problem with an asp.net 3.0 application using a gridview to display data.  The problem seems to be that despite a brand new .selectCommand being sent to the sqlDataSource, the gridview starts displaying data from *someone else's* query.  For example, user A is logged in and will be working fine until a few page submissions later when the gridview data starts suddenly showing information that belongs to another user. 

This is my first asp.net application, though I've been working with classic asp and ADO for years so I'm used to sending a SQL string and getting back the results from that string.  Apparently there is a complex caching system which is interferring which I do not at all understand so at this point I just want to stop the server from caching any data whatsoever.  Is this possible?

Any and all help will be much appreciated!!

Could some one tell me whats the Problem with this String Manipulation ??? C#.net



I store some values from code behind to a label which is Hidden !

<asp:Label ID="lbl_Hidden" runat="server" Visible = "false"></asp:Label>

and at the page load event i retrieve the value of the label & assign it to a string !

stringvalue = lbl_Hidden.Text;

Now i dont know why this manipulation does'nt work !

I've a character 'A' in the string and i'm unable to replace it with a space !

stringvalue.Replace(A, " ");

Wot do u think abt it ????

RaiseEvent problem


I have a parent page ProdView.aspx and two static UserControls, UC1 and UC2. Each UC is in an Ajax accordion pane and the accordion inside an updatepanel.

UC1 has a Gridview footer with couple of textboxes and a link button that fires an Add Row insert procedure. I want to Raise an event that will rebind the UC2 after the row insert in UC1.

First I created the sub delegate and event in UC1:

  • Public Delegate Sub MyRefresh(ByVal sender As Object, ByVal e As CommandEventArgs)
  • Public Event Refresh_UC1 As MyRefresh

In the same UC1 the Insert procedure that fires the insert and RaiseEvent:

Sub PricingGrid_Insert(ByVal sender As System.Object, ByVal e As EventArgs)
       Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
       Dim myCom As SqlCommand = New SqlCommand("AddRow", myConn)
       myCom.CommandText = "AddRow"
       myCom.CommandType = CommandType.StoredProcedure


Gridview Enable Selection Problem



I have a gridview with Enable selection and Enable Paging equals to TRUE.

I also set the PageSize of my gridview to 4 so that I only displays 4 rows per page.

The problem is when I click the pager in the bottom of my gridview, my gridview is disappearing and no records appear.

Here is code behind of my gridview:

If e.Row.RowType = DataControlRowType.DataRow Then
                e.Row.Attributes("style") = "cursor:pointer"

                e.Row.Cells(2).Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(sender, "Select$" & e.Row.RowIndex.ToString))
                e.Row.Cells(3).Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(sender, "Select$" & e.Row.RowIndex.ToString))
                e.Row.Cells(4).Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(sender, "Select$" & e.Row.RowIndex.ToString))
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                e.Row.Cells(6).Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(sender, "Select$" & e.Row.RowIndex.ToString))

Problem making Role based Menu in MVC application



 I want to make Rolebase menu in MVC such that if user doesnot have permission for some action then that Action name shouldnot be shown in the Menu.

 I have used the code in the url(http://forums.asp.net/t/1566328.aspx) in my MVC application.My application is a Discussion Forum(in MVC) same functionality as in this forum forums.asp.net

 I have used Controllers for post, thread etc.In each controller there are some actions that are using [Authorize(Roles)] attribute

 but this coding does not count  those Actions in Controllers having Authorize attribute according to the url http://forums.asp.net/t/1566328.aspx 

 In the code, Authorize attribute is applied to Controller class, but my requirement is of Applying Authorize attribute to some actions in controller so that some are available for all users and  some links are available rolewise.Now what is the solution for that?



Problem upgrading to MVC3 - System.Web.Routing



I'm trying to upgrade to .NET 4 and MVC 3.

When trying to compile my project, I get the error:

Error 1 The type or namespace name 'Routing' does not exist in the namespace 'System.Web' (are you missing an assembly reference?) C:\Users\spencer\Desktop\weblauncher\Common\MVCConfig.cs 4 18 Common

The type or namespace name 'Routing' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)

I do have the System.Web.Routing in my references for the project.

BUT - when I try to view System.Web.Routing in the OBJECT BROWSER, nothing is inside!  The System.Web.Routing namespace is not in there - the entire thing is empty!  Could it that the dll is corrupted?  I tried to reinstall the .NET 4 and MVC 3 stuff, but its still empty!

The dll is coming from here:

C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Web.Routing.dll

and the runti

Embed Youtube inside Ajax Html Editor- problem



When inserting a simple embed of youtube inside the ajax editor, on firefox and chrome problems occur. On the other hand on internet explorer 8 everything works fine. I found this solution http://www.nopcommerce.com/boards/t/4228/bug-in-ajax-html-editor.aspx . 

My question is where do I find the DesignPanel.pre.js ?


Roderick Vella

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