The textbox change is not working efficiently, you have to click outside the textbox for the event to fire.

What i want is  as i am typing it should display the event. I actually want to use it for search purpose that is as i am typing it should display the record in grid view if available. I don't need to click outside box.

Please help

My code below

<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True"
    ontextchanged="TextBox1_TextChanged" Width="182px"></asp:TextBox>
<div>
    <asp:Label ID="Label1" runat="server"></asp:Label>
</div> 

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    Label1.Text = "Not working well,i have to click outside the texbox for it to work.Please help ?";
}