Javascript pass value to asp.net

asp.net, c#, dynamic, javascript

Solution

try to use hidden field

aspx page

<asp:HiddenField ID="hType" runat="server" ViewStateMode="Enabled" Value="" />
<asp:HiddenField ID="hValue" runat="server" ViewStateMode="Enabled" Value="" />
<asp:Label ID="lblValue" runat="server" Text="" Visible="true"></asp:Label>
<asp:Label ID="lblType" runat="server" Text="" Visible="true"></asp:Label>
<asp:Button Text="text" OnClick="btnSearch_Click" runat="server" />
<script type="text/javascript">
    $(document).ready(function () {
        $("#MainContent_ddlFieldName").live("change", function () {
            var id = $(this).val();
            var name = $(this + "option:selected").text();

            $('#<%= lblValue.ClientID %>').text(name);
            $('#<%= hValue.ClientID %>').val(name);
            $('#<%= lblType.ClientID %>').text(id);
            $('#<%= hType.ClientID %>').val(id);
        });
    });
</script>

code behind

    protected void btnSearch_Click(object sender, EventArgs e)
    { 
        //server side code
        string strValue = hValue.Value;
        string strType = hType.Value;


    }

Problem

Original source