How to detect users refresh in my asp.net page

[J-T]

Is there a way to detect if a user has refreshed a page in asp.net?

Thanks a lot

 

[Brock Allen]

You'll get another request to the page. What are you trying to do?

-Brock
DevelopMentor
http://staff.develop.com/ballen

 

[Stefan]

Are you trying to detect a double GET or a double POST?

 

[Jack Li]

You may keep a counter session variable and increase that per each request.
A copy of this value is also stored on the client side (for example on the
query string). If the request is being sent multiple times by hitting the
browser refresh button, you can detect it on the server side by comparing
the counter.

Regards,
Jack Li
MVP (ASP.NET)

 

[J-T]

I have a form :

<form id="frmUpload" name="UploadFileFromClientForm" method="post"
encType="multipart/form-data" runat="server">
......

<INPUT id="UploadTheFile" type="button" value="Upload" name="UploadTheFile"
runat="server">
.......
</form>

and here is the code behind it:
private void UploadTheFile_ServerClick(object sender, System.EventArgs e)

{

HttpPostedFile file = File1.PostedFile;

byte[] fileData = new byte[file.ContentLength];

file.InputStream.Read(fileData, 0, file.ContentLength);

uploader.FileName=Path.GetFileName(file.FileName);

uploader.Upload();


}

whenever the user refreshes the page UploadTheFile_ServerClick is being
called and another record with the same information is being inserted into
my database.



Any,suggestions?



Thanks

 

[Joerg Jooss]

I have a form :

<form id="frmUpload" name="UploadFileFromClientForm" method="post"
encType="multipart/form-data" runat="server"> .....

<INPUT id="UploadTheFile" type="button" value="Upload"
name="UploadTheFile" runat="server"> ......
</form>

and here is the code behind it:
private void UploadTheFile_ServerClick(object sender,
System.EventArgs e)

{

HttpPostedFile file = File1.PostedFile;

byte[] fileData = new byte[file.ContentLength];

file.InputStream.Read(fileData, 0, file.ContentLength);

uploader.FileName=Path.GetFileName(file.FileName);

uploader.Upload();


}

whenever the user refreshes the page UploadTheFile_ServerClick is
being called and another record with the same information is being
inserted into my database.



Any,suggestions?

A synchronizer token will help. Here's an article with a sample
implementation: http://tinyurl.com/3ma4x

Cheers,