Keypress counter from a Multiline Textbox

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I am trying to make a counter for each "keypress".

All it shows is the text in TextBox1 but nothing in TextBox3.

Any suggestions?

ASP.NET

<script src="../Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var minCount = 1;
            var maxCount = 500;
            $("#TextBox1").keypress(function () {
                var strCount = $("#TextBox1").val().length;
                $("#TextBox3").val(strCount);
            });
        });
    </script>
<asp:TextBox ID="TextBox1" TextMode="MultiLine" Rows="25" Width="800" Height="100" runat="server"></asp:TextBox><br />
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

Posted 1-Mar-13 4:50am

Teledextri

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nika2008 1-Mar-13 19:36pm

can you use javascript or only jquery?

2 solutions

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Manfred Rudolf Bihy · Answer 1 · 2013-03-01T04:55:00

For the "run at server" tags the attribute ID has a different connotation than usual in HTML. ID is the name of the variable used in the code behind. If you want to get the ID of the tag as present on the client side do this:

ASP.NET

<script src="../Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var minCount = 1;
            var maxCount = 500;
            $("<%= TextBox1.ClientID %>").keypress(function () {
                var strCount = $("<%= TextBox1.ClientID %>").val().length;
                $("<%= TextBox3.ClientID %>").val(strCount);
            });
        });
    </script>
<asp:TextBox ID="TextBox1" TextMode="MultiLine" Rows="25" Width="800" Height="100" runat="server"></asp:TextBox><br />
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

Regards,

— Manfred

Teledextri · Answer 2 · 2013-03-01T06:56:00

Solution 2

The real solution is:

$("#<%= TextBox1.ClientID %>")

do not forget the # in front.

With that it works correctly.

Posted 1-Mar-13 6:56am