I can't validate a radiobutton list

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I want at least one radiobutton to be checked. My asp code looks like

XML

<asp:RadioButtonList ID="rbtOdgovor" runat="server"
                           RepeatLayout="Table" AutoPostBack="True" CausesValidation="True">
                           <asp:ListItem Text="yes" Value="rbtYes"></asp:ListItem>
                           <asp:ListItem Text="No" Value="rbtNo"></asp:ListItem>

                       </asp:RadioButtonList>
                       <asp:RequiredFieldValidator
                           ID="ValidatorOdgovor"
                           runat="server"
                           ControlToValidate="rbtOdgovor"
                           ErrorMessage="Please enter a value; ValidateRequestMode="Enabled"></asp:RequiredFieldValidator>

ASP.NET

<asp:Button runat="server" ID="btnSave" Text="Answer" Font-Names="Tahoma" Height="30px" Width="100px"  OnClick="btnSave_Click" ValidateRequestMode="Enabled" />

But it doesnt work!!

Posted 13-Apr-14 22:06pm

Voley

Updated 13-Apr-14 22:51pm

Nelek

v3

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3 solutions

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Kan07 · Answer 1 · 2014-04-14T00:06:00

XML

<asp:RadioButtonList
    ID="RadioButtonList1"
    runat="server"
    RepeatColumns="3">
    <asp:ListItem>Red</asp:ListItem>
    <asp:ListItem>Yellow</asp:ListItem>
    <asp:ListItem>Blue</asp:ListItem>
    <asp:ListItem>Green</asp:ListItem>
</asp:RadioButtonList>
<asp:RequiredFieldValidator
    ID="ReqiredFieldValidator1"
    runat="server"
    ControlToValidate="RadioButtonList1"
    ErrorMessage="You must Select your favorite color!">*
</asp:RequiredFieldValidator>

Murugesan22 · Answer 2 · 2014-04-13T22:32:00

Hi,

The simplest way is as the above approach from Jos. Using a RadioButtonList and a RequiredFieldValidator.

XML

<asp:RadioButtonList ID="RadioButtonList1" runat="server">
            <asp:ListItem>north</asp:ListItem>
            <asp:ListItem>west</asp:ListItem>
        </asp:RadioButtonList>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
            ControlToValidate="RadioButtonList1" ErrorMessage="RequiredFieldValidator">
        </asp:RequiredFieldValidator>

2. Without RadioButtonList and if you want a group radiobutton insteads, you can also implement it by CustomValidator.

C#

<script language="javascript" type="text/javascript" >
function CustomValidator1_ClientValidate(source,args)
{
    if(document.getElementById("<%= RadioButton1.ClientID %>").checked || document.getElementById("<%= RadioButton2.ClientID %>").checked)
    {
        args.IsValid = true;
    }
    else
    {
        args.IsValid = false;
    }

}
//-->
</script>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:RadioButton ID="RadioButton1" runat="server" GroupName="location" Text="north" />
    <asp:RadioButton ID="RadioButton2" runat="server" GroupName="location" Text="west" />
    <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    <asp:CustomValidator id="CustomValidator1" runat="server" Display="Dynamic" ErrorMessage="please choose" ClientValidationFunction="CustomValidator1_ClientValidate" OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator>
    </div>
    </form>
</body>

C#

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
    args.IsValid = RadioButton1.Checked || RadioButton2.Checked;
}
protected void Button1_Click(object sender, EventArgs e)
{
    if (Page.IsValid)
    {
        //validate is successful.
    }
}

code blocks corrected

Murugesan22 · Answer 3 · 2014-04-13T22:30:00

Solution 1

Hi,

Check this
http://forums.asp.net/t/1199803.aspx[^]

Posted 13-Apr-14 22:30pm

Murugesan22

I can't validate a radiobutton list

3 solutions

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