for gridview

Question

i have gridview and inside gridview i have 2 dropdownlist
on selected indexchanged of 1st DDL then 2nd DDL bind
on selected indexchanged of 2nd DDL then textbox filled with any value
on aspx i used master page.
after select index changed page is reload
i want page should not be reload and my working is all done.
how to achieve it in VB.Net

Adarsh Nigam · Answer

To achieve this without a full page reload, you can use ASP.NET's built-in AJAX functionality, specifically the UpdatePanel control. Here's an example of how you can modify your ASPX page to achieve this: Code Behind Protected Sub ddl1_SelectedIndexChanged(sender As Object, e As EventArgs) ' Bind ddl2 based on ddl1 selection Dim ddl1 As DropDownList = DirectCast(sender, DropDownList) Dim ddl2 As DropDownList = DirectCast(ddl1.NamingContainer.FindControl("ddl2"), DropDownList) ' Bind ddl2 items ddl2.DataSource = ' your data source ddl2.DataBind() End Sub Protected Sub ddl2_SelectedIndexChanged(sender As Object, e As EventArgs) ' Fill txtBox based on ddl2 selection Dim ddl2 As DropDownList = DirectCast(sender, DropDownList) Dim txtBox As TextBox = DirectCast(ddl2.NamingContainer.FindControl("txtBox"), TextBox) ' Fill txtBox with value txtBox.Text = ' your value End Sub By using the UpdatePanel control, you can update the contents of the panel without causing a full page reload. The Triggers section specifies which controls will trigger an asynchronous postback. In the code-behind, you can access the controls within the UpdatePanel using the NamingContainer property. Make sure to add the ScriptManager control to your Master Page, and set EnablePartialRendering to true . This should achieve the desired behavior without a full page reload.