Question

While I am trying to get the value of textbox with .val(), Its always showing ‘undefined’.
Below is the code i am using. Please help me out friends.

<asp:TextBox runat="server" ID="txtComment" Width="650" />

<asp:Button runat="server" ID="btnSubmitComment" Text="Submit" />

$(document).ready(function () {
    $('input[id$=btnSubmitComment]').click(function () {
    var comment = $("#txtComment").val();
    alert(comment);
});

Answer 1

One standard way on asp.net is to get the rendered id and use it on javascript as:

$(document).ready(function () {
    $('#<%=btnSubmitComment.ClientID%>').click(function () {
    var comment = $('#<%=txtComment.ClientID%>').val();
    alert(comment);
});

(from the moment you go with ID, and not use some other way to select the controls, like the css, the type etc.