RichTextBox - Problem "Paste" method not working if text copy from OneNote

Question

For certain reasons I need to handle the text when it is copied from the clipboard to the RichTextBox via ShortCut ctrl+v.

I use for this:
DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Text);
if (textBox.CanPaste(myFormat))
{
textBox.Paste();
string pasteText = textBox.Text;

The problem is, if the text is copied from OneNode textBox.Text contains only a " " space.

If richtextbox handle this byself is it working.

If I use this code is also working:

        DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Text);  
        if (textBox.CanPaste(myFormat))  
        {  
            string insertText = Clipboard.GetText();  
            if (!string.IsNullOrEmpty(insertText))  
            {  
                textBox.Text = insertText;  

Is the a bug or what do I wrong with "Paste" method?

I have a small test program where I can reporduce the problem. If need.

Thanks in advance.

Bye
Dirk

Answer 1

@Dirk Vatterott , thanks for the feedback, based on my test, I reproduced your problem.

We need to use DataFormats.UnicodeText when we paste the format from OneNote to richtextbox.

If you want to paste the format from the OneNote to Richtextbox and show the paste text, you could try the following code:

 internal void DoPasteAction(RichTextBox textBox)  
        {  
            DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.UnicodeText);  
            if (richTextBox1.CanPaste(myFormat))  
            {  
                richTextBox1.Paste();  
                string insertText = Clipboard.GetText();  
                MessageBox.Show(insertText);  
            }  
        }  

Result:

Best Regards,
Jack

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Answer 2

Here is the code:

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
//this.richTextBox1.ShortcutsEnabled = false;
}

    private void richTextBox1_KeyDown(object sender, KeyEventArgs e)  
    {  
        switch (e.KeyCode)  
        {  
            case Keys.V:  
                if (e.Control)  
                {  
                    this.DoPasteAction(this.richTextBox1);  
                    e.Handled = true;  
                }  
                break;  
            case Keys.Insert:  
                if (e.Shift)  
                {  
                    this.DoPasteAction(this.richTextBox1);  
                    e.Handled = true;  
                }  
                break;  
        }  
    }  

    /// <summary>  
    /// Does the paste action. Paste only Text  
    /// </summary>  
    internal void DoPasteAction(RichTextBox textBox)  
    {  
        DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Text);  
        if (textBox.CanPaste(myFormat))  
        {  
            //Not working  
            textBox.Paste();  
            string pasteText = textBox.Text;  
            textBox.Text = CleanInputForXML(pasteText);  

            //Working  
            //string insertText = Clipboard.GetText();  
            //if (!string.IsNullOrEmpty(insertText))  
            //{  
            //    insertText = CleanInputForXML(insertText);  
            //    textBox.Text = insertText;  
            //}  
        }  
    }  

    public static string CleanInputForXML(string strIn)  
    {  
        // Replace invalid characters with empty strings.  
        try  
        {  
            return Regex.Replace(strIn, @"[^\w]", "", RegexOptions.None);  
        }  
        catch  
        {  
            return strIn;  
        }  
    }  


}