Clipboard Operation with C#

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Hi friends,

I am running a hidden windows application made in C#.
If the user copies a number from anywhere, A window Popup will come and show "Call ######?" with a Call and Cancel Button....

C#

public partial class Form1 : Form
 {
     string LastClipBoardText = "";
 private void timer2_Tick(object sender, EventArgs e)
     {


         List<string> phone_nums = new List<string>();
         if (Clipboard.ContainsText())
         {

             if (LastClipBoardText != Clipboard.GetText(TextDataFormat.Text))
             {
                     LastClipBoardText =  Clipboard.GetText(TextDataFormat.Text);
         //Some code here
     }
      }
 }
   }

I am using LastClipboardText to avoid checking again and again for the same data. and It works well...
Problem comes, when a customer again copies the same text with mouse... :D He expects the window again to show up; But won't, as it is the same data stored in LastCLipboardText....

Is there any idea to solve this issue? Can I get the copied time from clipboard ???

Posted 2-Oct-13 23:29pm

Yesudasan Moses

Updated 2-Oct-13 23:30pm

v2

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2 solutions

Solution 2

I suggest you learn about GlobalHooks in .NET: [^].

If the end-user triggers your GlobalHook action by copying some text, and then pressing some keyboard combination: you have the great advantage that you don't have to parse every single number the user copies, and your code doesn't have to respond to every single copy to the clipboard, no matter what object is being copied.

Posted 3-Oct-13 3:54am

BillWoodruff

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Eduard Keilholz · Accepted Answer · 2013-10-02T23:41:00

I think you'll have to use some p/invoke:

C#

[DllImport("User32.dll", CharSet=CharSet.Auto)]
public static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);

See this [^] article on how to set up a clipboard monitor in c#. Basically you register your app as a clipboard viewer using

C#

_ClipboardViewerNext = SetClipboardViewer(this.Handle);

and then you will recieve the WM_DRAWCLIPBOARD message, which you can handle by overriding WndProc:

C#

protected override void WndProc(ref Message m)
{
    switch ((Win32.Msgs)m.Msg)
    {
        case Win32.Msgs.WM_DRAWCLIPBOARD:
        // Handle clipboard changed
        break;
        // ... 
   }
}