how can i scroll to specific line in a webforms TexetBox using c#

Question

I have a TextBox multiline and i need to scroll to specific line in textbox.. Please help me

Page.ClientScript.RegisterStartupScript(this.GetType(), "check", "<script type=\'text/javascript\'>document.getElementById('" + this.textbox.ClientID + "').scrollHeight=100;</script>");

Answer 1

Have you tried using scrollTop?

e.g.

function scrollTextBox()
{
    var textBox = document.getElementById("<%= TextBox1.ClientID %>");
    textBox.scrollTop = 30;
}

You'll need to calculate the scrollTop value though using the line number.