how to save and restore the cursor line poistion in rich textbox

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Hi

How to save and restore the cursor line and position in richtextbox.

i placed a richtextbox in win form and a i placed a label which contains line number. if we save a position and scroll if we want to restore we need to scroll to the original position.

Thanks
GSS

Posted 10-Apr-14 23:20pm

Gssankar

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S Houghtelin · Answer 1 · 2014-04-11T02:22:00

Here are some basic methods to navigate in the manner that you describe. You can increase the scope of the position variable or even save it as a user setting so that the editor can resume to the position when the user restarts the program.

C#

// Get the position
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
    // Capture position    
    Point curPos = Cursor.Position;
    // Place position in textbox
    textBox1.Text  = richTextBox1.GetCharIndexFromPosition(curPos).ToString();
}

// Set and scroll to the position
private void button1_Click(object sender, EventArgs e)
{
    // Subtract 1 from stored position to restore to original position.
    richTextBox1.SelectionStart = int.Parse(textBox1.Text) - 1; 
    richTextBox1.SelectionLength = 0;
    // Scroll to position
    richTextBox1.ScrollToCaret();
    // Return focus to RTB
    richTextBox1.Focus();
}

Good luck.