Asp.net dropdown onchange calling function and within function getting dropdown selected values

Question

1.aspx page

A.) asp:dropdown ...onchange="javascriptfunctionname">

B.) <script>
Javascriptfunctionname
{
  Getting dropdown selected values
}
</script>


C.) Problem Here:
How to pass drop down selected values in any c# method


D.) C# code
Public methodname
{
     // NEED TO COMBO VALUES HERE ON CALLING ONCHANGE FUNCTION
}

Please help to guide.Its very important and is to complete urgently.Thanks

Answer 1

You may use post back on the control, and everytime onchange hit, it will do postback to server and you may get your value on the server side.

html

<asp:dropdownlist runat="server" autopostback="true" onselectedindexchanged="ddlTest_SelectedIndexChanged" id="ddlTest">  </asp:dropdownlist>

code behind

protected void ddlTest_SelectedIndexChanged(object sender, EventArgs e)
    {
        string selectedText = ddlTest.SelectedItem.Text;
        string selectedValue = ddlTest.SelectedItem.Value;

        //--- Show results in page.
        Response.Write("Selected Text is " + selectedText + " and selected value is :" + selectedValue);
    }