How to validate dropdownlist in asp.net using c#- Solved

Validate dropdownlist in asp.net using c#

In this tutorial, we are going to discuss "How to validate dropdownlist in asp.net". Here we take one drop-down control and one button to check wheater our validation works or not.

Step to implement validation for Dropdown control asp.net

1. Add a required field validator.

2. Match the id of Dropdown control with requireFieldValidator's property controlToValidate

3. Give the error message.

<td align="left">

   <asp:DropDownList ID="ddlLectureTime" runat="server" AutoPostBack="True" CssClass="DropDown"     OnSelectedIndexChanged="ddlLectureTime_SelectedIndexChanged">

     </asp:DropDownList>

  <asp:RequiredFieldValidator ID="req121" runat="server" ErrorMessage="*" ControlToValidate="ddlLectureTime"     ValidationGroup="Save"   InitialValue="0" Font-Bold="true" ForeColor="Red"></asp:RequiredFieldValidator>

   </td>

<td>

  <asp:Button ID="btnSave" runat="server" Text="Save"  ValidationGroup="Save" OnClick="btnSave_Click" OnClientClick="parent.scrollTo(0, 0); return true" CssClass="btnSave" />

  </td>