How To Show alert message when file already exists(When Browsing for a new file) in asp.net

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Hello All,
How To Show alert message when file is already taken(When Browsing for a new file) in asp.net..

Any Suggestions...

Posted 3-Oct-12 19:29pm

cunny

Updated 3-Oct-12 19:30pm

v2

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Rockstar_ 4-Oct-12 1:31am

Can you please elaborate your problem?

cunny 4-Oct-12 1:46am

What i meant to say is...If user browse some file,if file is already taken then it must show a alert message saying that file is already taken?

Sergey Alexandrovich Kryukov 4-Oct-12 1:32am

What is "browsing for a file"? What is unclear: File.Exists or showing?
--SA

cunny 4-Oct-12 1:46am

What i meant to say is...If user browse some file,if file is already taken then it must show a alert message saying that file is already taken?

Sergey Alexandrovich Kryukov 4-Oct-12 2:40am

OK, that was my guess, thank you for clarification. Please see the answer.
--SA

Rockstar_ 4-Oct-12 2:01am

when you select the file , may be you are assigning the path and filename to a variable, based on the content of the variables you can display alert message.

2 solutions

Solution 1

File exists: System.IO.File.Exists.

Showing: many methods are available; I would recommend this:

HTML

<p><% some_C#_expression_calculating_the_message_text %></p>

Note that the by existing file you can only mean some file in the file system of the host where the HTTP server works. Consequently, you can only calculate existence on the server part, which makes the "showing" easy: the content is returned in the HTTP response anyway.

—SA

Posted 3-Oct-12 19:38pm

Sergey Alexandrovich Kryukov

Updated 3-Oct-12 19:39pm

v2

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**NAGARAJ N MACHAKNUR** · Accepted Answer · 2012-10-03T20:06:00

C#

/*To get user uploaded file name*/
UploadedFile filename = rauPIAMSpeRateLetter.UploadedFiles[0];
strGetFileName = filename.GetName();

                             /*Path to save user uploaded file(Store your path in hidden field)*/
                                string strFileName = hdfUploadPath.Value + strGetFileName;

                                /*Check for existence of file if not exists then I am saving else I am giving message to user*/
                                if (!File.Exists(strFileName))
                                {
                                    filename.SaveAs(strFileName, true);
                                }
                                else
                                {
                                    ScriptManager.RegisterStartupScript(this, this.GetType(), "Error", "alert('File already exist or rename file then upload');", true);
                                    return;
                                }