How to handle request validation exception - ASP.NET Discussion Boards

Abhishek Sur6-Jan-10 20:51

6-Jan-10 20:51

Check in the last example, I am using AJAX to get the XML data from the server. Just replace the XML datasource with your appropriate data.

It is very easy to do that, I have done that lots of time.

Other than that, you can also place the retrieved points in some hidden field and place markers in the pageload.

Hope you got it. Thumbs Up | :thumbsup:

Abhishek Sur
Don't forget to click "Good Answer" if you like this Solution.
My Latest Articles-->
Windows7 API Code Pack

Simplify Code Using NDepend
Basics of Bing Search API using .NET

SQl

Hema Bairavan1-Jan-10 6:58

Hema Bairavan

1-Jan-10 6:58

Hi peoples,

Need a clarification in MSSQL, here there is no separate board is there,
can i post the SQL question here?

Re: SQl

Brij1-Jan-10 7:21

Brij

1-Jan-10 7:21

Ask your Question in General Database forum.It will be more helpful

Cheers!!
Brij

Re: SQl

Hema Bairavan1-Jan-10 7:39

Hema Bairavan

1-Jan-10 7:39

thanks brij i was looking for the word SQL, didnt see the DB thanks
happy new year

Re: SQl

Brij1-Jan-10 19:04

Brij

1-Jan-10 19:04

Happu new year you too dude Smile | :)

Cheers!!
Brij

Re: SQl

Abhijit Jana1-Jan-10 7:52

Abhijit Jana

1-Jan-10 7:52

Hema Bairavan wrote:
can i post the SQL question here?

General Database is most appropriate Smile | :)

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Re: SQl

Hema Bairavan1-Jan-10 7:53

Hema Bairavan

1-Jan-10 7:53

yes abhijit, i have posted there.. if u have time please check there and revert me
thanks and happy new year

How to handle request validation exception

THE SK1-Jan-10 5:48

THE SK

1-Jan-10 5:48

Hi All

I have the following code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<script language="C#" runat="server">

protected void button1_Click(object sender, EventArgs e)
{
try
{
TextBox1.Text = (TextBox1.Text + "<strong></strong>");
Label1.Text = (TextBox1.Text);
}
catch (System.Web.HttpRequestValidationException)
{
Response.Write("html is not allowed");
}
}

</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine" Height="300px" Width="400px"></asp:TextBox>
</div>
<asp:Button ID="button1" runat="server" Text="strong" onclick="button1_Click" />
<asp:Label ID="Label1" runat="server"></asp:Label>

</form>
</body>
</html>

If i click on button twice I am getting request validation exception which I want to catch.

The error which I am getting is

*************************************************************************

Server Error in '/TextControlOnSite' Application.
--------------------------------------------------------------------------------

A potentially dangerous Request.Form value was detected from the client (TextBox1="<strong></strong>").
Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.

Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (TextBox1="<strong></strong>").

Source Error:

[No relevant source lines]

Source File: c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\textcontrolonsite\d5a3eadf\30926e30\App_Web_rwvmmuiv.0.cs Line: 0

Stack Trace:

[HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (TextBox1="<strong></strong>").]
System.Web.HttpRequest.ValidateString(String s, String valueName, String collectionName) +3310274
System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, String collectionName) +108
System.Web.HttpRequest.get_Form() +119
System.Web.HttpRequest.get_HasForm() +3312222
System.Web.UI.Page.GetCollectionBasedOnMethod(Boolean dontReturnNull) +45
System.Web.UI.Page.DeterminePostBackMode() +65
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7350
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213
System.Web.UI.Page.ProcessRequest() +86
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.default_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\textcontrolonsite\d5a3eadf\30926e30\App_Web_rwvmmuiv.0.cs Blush | :O

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +358
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.1873; ASP.NET Version:2.0.50727.1433

***************************************************************************

I have put try catch block but it is not executing.
I know that we can use Server.HtmlEncode and Server.HtmlDecode method and also knows that ValidateRequest property of page attribute.But in my case i want to execute some code only on this page when the RequestValidation Exception occurs.
I donot want to handle error in global.asax file.
I want to handle error on this page only.

Please suggest.

Thanks

Regards
Sandeep

Re: How to handle request validation exception

Anurag Gandhi1-Jan-10 6:39

Anurag Gandhi

1-Jan-10 6:39

The solution is present in your exception itself.

put validateRequest="false" in your <%@ Page directive

This will solve your problem.

Try google and you will know why this exception occurs while posting back.

Anurag Gandhi.
http://www.gandhisoft.com
Life is a computer program and every one is the programmer of his own life.

Re: How to handle request validation exception

Brij1-Jan-10 7:20

Brij

1-Jan-10 7:20

Why do you want to catch exception at server side.. you can do it by custom validator also

but if you want to do it server side only... put ValidateRequest="false" in page attribute.. Now .Net allow this request to go server side.Now make your handler to throw some exception according to your need and show the message accordingly..

Cheers!!
Brij

Problem in sending email [modified]

Khaled.Hossain1-Jan-10 5:05

Khaled.Hossain

1-Jan-10 5:05

I am writing a code which send Email to the respective email address. First time its working fine. But after sending my first email its not accept my program and I am not able to send email again. I put the code snippet here.

Dim smtpServer As New SmtpClient
Dim messageSTR As New MailMessage
Dim strAddress As New MailAddress("Email address", "Name") 

messageSTR.From = strAddress 
messageSTR.To.Add("To Email Address")
messageSTR.Subject = Me.txtSub.Text
messageSTR.Body = Me.txtMailBody.Text

smtpServer.Host = "smtp.gmail.com" 
smtpServer.Port = 578 

smtpServer.Credentials = New NetworkCredential("user id", "user pass")

smtpServer.EnableSsl = true
smtpServer.Send(messageSTR)

What is the problem? Why I don't send the second mail?

Exception Shown: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 209.85.129.109:578.
Error Message: Unable to connect to the remote server

modified on Friday, January 1, 2010 11:23 AM

Re: Problem in sending email

Brij1-Jan-10 5:17

Brij

1-Jan-10 5:17

Can you post the error details that you are getting.It'll be of helpful to give the relevent answer

Cheers!!
Brij

Re: Problem in sending email

Khaled.Hossain1-Jan-10 5:30

Khaled.Hossain

1-Jan-10 5:30

The problem was,

I am writing the invalid port number.

I put portnumber=578 But it should be 587.

Thanks.

Re: Problem in sending email

AhsanS1-Jan-10 5:38

AhsanS

1-Jan-10 5:38

is your problem resolved? If so kindly write it so that others may know that your problem is resolved Laugh | :laugh:

Ahsan Ullah
Senior Software Engineer
MCTS 2.0

Re: Problem in sending email

Brij1-Jan-10 6:04

Brij

1-Jan-10 6:04

ok.. but wasn't it created the problem in sending first mail ? Smile | :)

Cheers!!
Brij

Re: Problem in sending email

Khaled.Hossain1-Jan-10 16:27

Khaled.Hossain

1-Jan-10 16:27

At first, I send mail using default port number. Then I take it from the user and then creates the problem.

Thanks

Facebook like portal

syedsaqib1-Jan-10 4:08

syedsaqib

1-Jan-10 4:08

Hi,
I have a project requiement to build a facebook like website in C# & ASP

In this website:
- Allow at least 3 types of users: unregistered visitor, registered user and moderator
- Allow users to create profiles and upload images etc.
- Any user can search for people and view public profiles
- Registered users can create a profile which can connect with other members or groups of people can join. Each user can set their profile : public or private.
- Each user can add albums with pictures. Every picture may receive comments from friends or from other users which the user can accept or reject
- The user has one mailbox that can communicate with other members of the site.
etc etc

I am a novice when it comes to coding, I have so far been able to create profiles and allow uploading of images and returning but I seem to be lost at doing stuff like retrieving a user's images when his profile picture is clicked etc etc. Are there any references you guys could point me to that would give me more information on developing this. I like doing things on my own but would be useful if I could refer to a source for more info when I got stuck.

Thanks so much for helping!

Kool

Re: Facebook like portal

AhsanS1-Jan-10 5:40

AhsanS

1-Jan-10 5:40

Search out google.
This may help
http://www.rainbowportal.org/[^]

Ahsan Ullah
Senior Software Engineer
MCTS 2.0

How to read available control from a aspx file?

Md. Marufuzzaman31-Dec-09 23:26

Md. Marufuzzaman

31-Dec-09 23:26

Hi..
Happy New Year 2010.
I want to read all the available control from a physical aspx pages...How can I achieve this....I really need your Help..

Thanks
Md. Marufuzzaman

Don't forget to click [Vote] / [Good Answer] on the post(s) that helped you.

I will not say I have failed 1000 times; I will say that I have discovered 1000 ways that can cause failure – Thomas Edison.

Re: How to read available control from a aspx file?

N a v a n e e t h1-Jan-10 3:09

N a v a n e e t h

1-Jan-10 3:09

Controls property on a Page gives all child controls. Is that what you are looking for?

Best wishes,
Navaneeth

Re: How to read available control from a aspx file?

Abhijit Jana1-Jan-10 3:49

Abhijit Jana

1-Jan-10 3:49

Navaneeth wish you and your family a very very happy new year !

All the best !!!

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Re: How to read available control from a aspx file?

N a v a n e e t h1-Jan-10 3:57

N a v a n e e t h

1-Jan-10 3:57

Many thanks and wishes to you too. Smile | :)

Best wishes,
Navaneeth

Re: How to read available control from a aspx file?

Md. Marufuzzaman1-Jan-10 3:59

Md. Marufuzzaman

1-Jan-10 3:59

Dear Navaneeth & Abhijit
Happy New Year... Smile | :)

Could you provide some sample C# source on that...
Thanks a lot.

Thanks
Md. Marufuzzaman

Re: How to read available control from a aspx file?

N a v a n e e t h1-Jan-10 4:20

N a v a n e e t h

1-Jan-10 4:20

Something like,

void IterateChildrenRecursively(Control control)
{
   foreach(Control c in control.Controls)
   {
       // Do processing using c
       // Go recursive and process the children of c.
       IterateChildrenRecursively(c);
   }
}

// Assuming this code is on page
IterateChildrenRecursively(this); //Starting with top level controls on the current page

New year wishes to you too. Smile | :)

Best wishes,
Navaneeth

Re: How to read available control from a aspx file?

Md. Marufuzzaman1-Jan-10 5:15

Md. Marufuzzaman

1-Jan-10 5:15

Thanks

Thanks
Md. Marufuzzaman

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.