Which property must be enabled to fire events of Dropdownlist as well as TextBox control?

Answer:

We have to set AutoPostback property of Dropdownlist and Textbox control to True,if we want their'event to be fired.

If we do not set AutoPostback property to true,then event will not be raised.

<asp:DropDownList ID="ddl_employee_name" runat="server" OnSelectedIndexChanged="ddl_employee_name_SelectedIndexChanged" AutoPostBack="true" ></asp:DropDownList>

 

<asp:TextBox ID="txt_employee_pan_no" runat="server" AutoPostBack="true"  OnTextChanged ="txt_employee_pan_no_TextChanged"></asp:TextBox>