Q:

Text Change Event in asp.net

I have two textboxes, Text1 and Text2, in an Update Panel.  The code is here:
 <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="Panle" >
        <ContentTemplate>
        <asp:TextBox ID="TextBox1" runat="server" AutoPostBack="true" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>
        <asp:TextBox ID="TextBox2" runat="server" AutoPostBack="True"></asp:TextBox>
        </ContentTemplate> 
        </asp:UpdatePanel>

and I have wrote this code on textchanged event of Text1:
  Protected Sub TextBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        TextBox2.Text = TextBox1.Text
    End Sub

Now the problem is that when I enter the text in Text1, and then Press enter to then the text of text2 is equal to text of text1, but i want to do this before pressing the enter in text1.  I mean as i key down in text1 then the text of text2 should equal to text2.

A:

You can use JQuery to do what you want.
$('#<%=TextBox1.ClientID %>').keyup(function(event) {
   var value = $(this).val();
   $('#<%=TextBox2.ClientID %>').text(value);
});

Since you handle the problem at client side, you don't need to set AutoPostBack to True anymore.

A:

If you want to handle the keydown event, you need javascript:
<asp:TextBox ID="TextBox1" onkeydown="document.getElementById('TextBox2').value=this.value" runat="server" AutoPostBack="false"></asp:TextBox>

