ASP.NET

Re: how can i able to obtain the file size of uploaded file

3-Apr-09 7:04

i can do this on jsp but how this could be done in asp.net
thanks in advance

ToddHileHoffer3-Apr-09 7:14

having problem on sending html expression

3-Apr-09 7:14

this.FileUpload1.PostedFile.ContentLength

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Alok Sharma ji3-Apr-09 6:44

3-Apr-09 6:44

hi!! i am using a 3rd party dll in my project to html messaging like this message board in codeproject or a scrap like thing in orkut.
but every time when i pressed the send button of message it gives me error and message is not stored in db.
the error type is:

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. 

A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder2$TextBox22="dfg<br>").

Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder2$TextBox22="dfg<br>").


Stack Trace:

[HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder2$TextBox22="dfg<br>").]
   System.Web.HttpRequest.ValidateString(String s, String valueName, String collectionName) +3307682
   System.Web.HttpRequest.ValidateNameValueCollection(NameValueCollection nvc, String collectionName) +108
   System.Web.HttpRequest.get_Form() +119
   System.Web.HttpRequest.get_HasForm() +3309630
   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.messages_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\alok\deb20b3e\4118a126\App_Web_gd1it9hc.2.cs:0
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +358
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

how to solve this.

ToddHileHoffer3-Apr-09 7:12

3-Apr-09 7:12

Try reading the message genius.

Alok sharma ji wrote:
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.

Sorry. I was still mad at you for earlier. I didn't mean to make fun. You can disable the validation but it is a security risk. The built in request validation blocks people from using scripts to hack your server.

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Alok Sharma ji3-Apr-09 7:23

3-Apr-09 7:23

yes ! i assume that it could be risky but how then they(other sites like cp or facebook , orkut, etc.) manage that risk.

ToddHileHoffer3-Apr-09 7:26

3-Apr-09 7:26

Alok sharma ji wrote:
yes ! i assume that it could be risky but how then they(other sites like cp or facebook , orkut, etc.) manage that risk.

I can't help you with that one. I've never turned off the validation on an internet site. I've only turned it off on a intranet site which has less risk.

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Alok Sharma ji3-Apr-09 7:26

3-Apr-09 7:26

Anyways! thanks.

fred_3-Apr-09 9:21

fred_

3-Apr-09 9:21

If you turn off validation it's up to you in your codebehind to validate all input before using it. Google "SQL injections" if you are writing to a database for example.

URL Rewriting Regular Expression

www.Developerof.NET3-Apr-09 19:53

www.Developerof.NET

3-Apr-09 19:53

Request validation is used for defending against various attacks such as XSS(Cross site scripting), Sql Injection etc....

Turning of this validation can make your page prone to such attacks. For this purpose microsoft has published an Anti XSS library that helps in validating the user input when such automatic validation is turned off.

You can download the XSS library here
http://www.microsoft.com/downloads/details.aspx?FamilyId=EFB9C819-53FF-4F82-BFAF-E11625130C25&displaylang=en[^]

and some brief explanation about using the library here

http://msdn.microsoft.com/en-us/library/aa973813.aspx[^]

Hope it helps....

When you fail to plan, you are planning to fail.

CandyMe3-Apr-09 5:23

CandyMe

3-Apr-09 5:23

Please help with regular expressions on the ff. links

http://localhost/Documents
http://localhost/Documents/

http://localhost/Documents/2009
http://localhost/Documents/2009/
http://localhost/Documents.aspx?Year=2009

http://localhost/Documents/2009/a.txt

These RULES doesn't seem to work. Frown | :(

^Documents/?$

^Documents/([^/]+)/?$

^Documents/([^/]+)/([^/]+)/?$

Thank you very much in advance.

Gerri

Checked Two radiobuttons simultaneouly while page is open

Nitinpro3-Apr-09 4:14

Nitinpro

3-Apr-09 4:14

Dear Guys,
Please Help or reslove this prob.My pro is that -- my asp page is open which includes two radiobuttons,and when i selected both radio buttons,both are checked,so please give a suggestions hw will i resolve it so that only one radiobutton can be checked at atime...

Reply Soon.

Re: Checked Two radiobuttons simultaneouly while page is open

ToddHileHoffer3-Apr-09 4:25

Re: Checked Two radiobuttons simultaneouly while page is open

3-Apr-09 4:25

Use a Radio Button List (only one option may be checked at a time).

Or write some javascript to uncheck one when the other is checked.

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Alok Sharma ji3-Apr-09 6:27

Re: Checked Two radiobuttons simultaneouly while page is open

3-Apr-09 6:27

oh! boy!!! dont you have any basic ideas of asp.net
well you have to group those radio buttons by properties window(may be you know that thing) if you are using VS and also you can use the radio button list

cheers!!

ToddHileHoffer3-Apr-09 6:58

Re: Checked Two radiobuttons simultaneouly while page is open

3-Apr-09 6:58

Alok sharma ji wrote:
oh! boy!!! dont you have any basic ideas of asp.net

No, I don't know a damn thing about asp.net. I've only been working full time doing ASP.Net development for about 8 years now. I have only successfully implemented about 100 corporate applications. As a matter of fact, most of my posts are just nonsense. I don't think I've helped a single person on this board ever.

Thanks for your comments.

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Alok Sharma ji3-Apr-09 7:06

Re: Checked Two radiobuttons simultaneouly while page is open

3-Apr-09 7:06

sorry! its a mistake i thought its goes to the questioner but again sorry
mis clicking,..........oh my god wat a fool i m Smile | :)

Alok Sharma ji3-Apr-09 7:07