DropDown List Validation

Anonymous User 1853 23 Aug 2014

I need to perform a validation to check whether a TextBox value is empty on Dropown list selected Index change using validation controls in asp.net

Ask by Anonymous User

Updated 23 Aug 2014

1 Answers

Sumit Kesarwani 23 Aug 2014

Hi Ankita,

I hope this will work fine.

    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
   
<asp:DropDownList ID="DropDownList1" runat="server" CausesValidation="true"
AutoPostBack="true">
    </asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="TextBox1"
runat="server" ErrorMessage="Please Enter the Value"></asp:RequiredFieldValidator>

Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.

Open .md

forum

DropDown List Validation

Can you answer this question?

1 Answers