Question

I am using asp.net. How to set the scrollbar to move at last line in multiline textbox at client side?

Answer 1

Set ClientIDMode="Static" so you can reference the textarea from jQuery using its ID:

<asp:TextBox ID="myTextBox" runat="server" ClientIDMode="Static" TextMode="MultiLine"></asp:TextBox>

And add this script after jQuery script tag:

$(document).ready(function () {
    $('#myTextBox').scrollTop($('#myTextBox')[0].scrollHeight - $('#myTextBox').height());
});

I was curious about compatibility so I tested it in Chrome, Firefox, Opera and IE9 and it works. 🙂

Here is a jsFiddle example of the solution: http://jsfiddle.net/g9KBB/