DropDown List Validation

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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

  1. Post:378

    Points:2694
    Re: DropDown List Validation

    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>

      Modified On Apr-04-2018 06:37:11 AM

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