Trying to pass value from ASP.NET JavaScript script to my C# Hidden Field -


i have javascript script inside asp.net web site, , want value function c# backend, using argument pass asp.net hidden field.

here asp.net & javascript code, define hiddenfield , assigns chatmessage var it, assign value var, , try send value returnliclass() function. (most relevant lines 1, 13, 14, 17):

<asp:hiddenfield id="chatmessage" runat="server" /> <script type="text/javascript">     $(function () {         // declare proxy reference hub.         var chat = $.connection.chathub;         // create function hub can call broadcast messages.         chat.client.broadcastmessage = function (name, message) {             // html encode display name , message.             var encodedname = $('<div />').text(name).html();             var encodedmsg = $('<div /> ').text(message).html();             var tremp_id = $('<div /> ').text("<%=request.querystring["trempid"]%>").html();              var chatmessage = document.getelementbyid('<%= chatmessage.clientid %>');             chatmessage.value = 'value javascript';              // add message page.             $('#discussion').append('<li class="<%=returnliclass(chatmessage.value)%><strong>' + encodedname                 + '</strong>:&nbsp;&nbsp;' + encodedmsg + "tremp:" + tremp_id + '</li>');         };         // user name , store prepend messages.         $('#displayname').val('<%=returnname()%>');         // set initial focus message input box.         $('#message').focus();         // start connection.         $.connection.hub.start().done(function () {             $('#sendmessage').click(function () {                 // call send method on hub.                 chat.server.send($('#displayname').val(), $('#message').val());                 // clear text box , reset focus next comment.                 $('#message').val('').focus();             });         });     }); </script>

the backend function (when debug neither msg nor chatmessage.value have values):

protected string returnliclass(string msg) {     string test = chatmessage.value;     return "redchat"; }

server function execute before html sent client. execute server function js use ajax. check out jquery.ajax.


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