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Ankita Pandey
Ankita Pandey

Total Post:183

Posted on    August-23-2014 7:37 AM

 ASP.Net ASP.Net 

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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

Sumit Kesarwani

Total Post:378

Posted on    August-23-2014 8:47 AM

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:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="TextBox1" runat="server" ErrorMessage="Please Enter the Value"></asp:RequiredFieldValidator>

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