C1RichTextBox Paste

C1RichTextBox Paste

Posted by: patrick.muellner on 4 December 2023, 12:50 am EST

• 

  patrick.muellner

  • Post Options:
  • Link
    Copy

  Posted 4 December 2023, 12:50 am EST

  Hi,

  which options do I have, if I want to prevent large graphic files from being inserted into the C1RichTextBox?
  
  Regards

• 

  aastha.gupta

  

  • Post Options:
  • Link
    Copy

  Posted 4 December 2023, 8:19 pm EST

  Hi Patrick,

  You can handle C1RichTextBox’s ClipboardPasting event and check if the Clipboard file does not meet the required criteria. Here is the code-snippet that restricts user from inserting large image files into the C1RichTextBox:

  private void rtb_ClipboardPasting(object sender, C1.WPF.RichTextBox.Documents.ClipboardEventArgs e)
  {
      if (Clipboard.ContainsImage())
      {
          BitmapSource img = Clipboard.GetImage();
          if(img.Height > 500 && img.Width > 500)
          {
              e.Handled = true;
              MessageBox.Show("File size is too large...");
          }
      }
  }

  Kindly refer to the attached sample for full implementation. See BlockLargeFilesRTB.zip.

  Thanks & Regards,
  
  Aastha