DropDown List Validation

Anonymous User 1762 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

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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>

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DropDown List Validation

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1 Answers