Required field validator drop down list asp.net

Question

I have a drop down list and Im trying to get a required field validator working for it.

   <asp:RequiredFieldValidator ForeColor="Red" InitialValue="0" ID="RequiredFieldValidator4" runat="server" ControlToValidate="dropDownListGender" ErrorMessage="Gender">*</asp:RequiredFieldValidator>    
<asp:DropDownList CssClass="dd" runat="server" ID="dropDownListGender" >
    <asp:ListItem>Male</asp:ListItem>
    <asp:ListItem>Female</asp:ListItem>
    </asp:DropDownList>

any ideas wont work and other validation working so not sure whats the problem

score 0 · Answer 1 · edited May 23 '17 at 12:16

0

By default an HTML select element generated for your ASP.NET DropDownList will have the first element selected. To work around this see this answer on SO: How to add a RequiredFieldValidator to DropDownList control?

edited May 23 '17 at 12:16

Community

1
1

answered Mar 10 '14 at 21:38

Jeremy

575
4
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score 0 · Answer 2 · answered Mar 10 '14 at 23:38

Another thing you can do is to use <asp:comparevalidator> control like this:

    <asp:DropDownList CssClass="dd" runat="server" ID="dropDownListGender" >
        <asp:ListItem>Select Gender</asp:ListItem>
        <asp:ListItem>Male</asp:ListItem>
        <asp:ListItem>Female</asp:ListItem>
    </asp:DropDownList>
    <asp:CompareValidator id="cv1" runat="server" controltovalidate="dropDownListGender" 
errormessage="Required" operator="NotEqual" valuetocompare="Select Gender"></asp:CompareValidator>

operator="NotEqual" will make your job done. Hope this helps.

score 0 · Answer 3 · answered Sep 22 '16 at 03:44

you have to add an initial listitem as below :-

<asp:RequiredFieldValidator ForeColor="Red" InitialValue="0" ID="RequiredFieldValidator4" runat="server" ControlToValidate="dropDownListGender" ErrorMessage="Gender">*</asp:RequiredFieldValidator>    
<asp:DropDownList CssClass="dd" runat="server" ID="dropDownListGender" >
    <asp:ListItem Value="0">Please Select</asp:ListItem>
    <asp:ListItem>Male</asp:ListItem>
    <asp:ListItem>Female</asp:ListItem>
    </asp:DropDownList>

Required field validator drop down list asp.net

3 Answers3