Copy to clipboard in ASP.NET

Question

This copy button functionality is working in localhost. But when deploy it into server it's not working on server side.

protected void btnCopy_Click(object sender, EventArgs e)
    {  
        try
        {
            Thread myth;
            myth = new Thread(new System.Threading.ThreadStart(CallSaveDialog));
            myth.ApartmentState = ApartmentState.STA;
            myth.Start();
            lblok.Text = "URL Copied to Clipboard, Use CTRL+V to Paste";
        }
        catch (Exception ex)
        {

            Class_login abc = new Class_login();
            abc.writeerrorlog(ex.Message);

        }
       
     
    }
    void CallSaveDialog() { System.Windows.Forms.Clipboard.SetText(TxtUrl.Text);  }

Be sure that "IIS Users or you" have write permission on target folder — cbalakus, Dec 02 '20 at 11:50
Why are you trying to set the clipboard content on a web server..? — stuartd, Dec 02 '20 at 11:52
@cbalakus this has nothing to do with folders or permissions. — CodeCaster, Dec 02 '20 at 11:53
@DeepthiHY your manager saying "yes, you can do this" does not mean that you have permission granted by the operating system, but that's entirely irrelevant here anyway. — CodeCaster, Dec 02 '20 at 11:54
You are copying the text to the server's clipboard. You probably wanted to do this on the client, or? — Klaus Gütter, Dec 02 '20 at 11:56

score 3 · Answer 1 · answered Dec 02 '20 at 11:56

This code:

System.Windows.Forms.Clipboard.SetText(TxtUrl.Text);

Runs on the web server. It sets the text to the clipboard of the user executing your web application, which usually is someone named IIS AppPool\Sitename. This user is not the visitor of your website, it is the server process that is running your .NET code.

It works on your development machine ("localhost"), because IIS Express runs as your user.

The solution is to do this using JavaScript: How do I copy to the clipboard in JavaScript?

Copy to clipboard in ASP.NET

1 Answers1