Validating Checkbox and Radio Button in C#

Question

I am using c# for coding!

Below is my html for checkbox and radion button

  <input type="radio" style="float: left;" name="documents" id="Checkbox9" value="yes"
                        runat="server" />
                    <label style="width: 35px!important;" class="checkbox">
                        <%=GetResourceString("c_HSGStudent")%>
                    </label>
                    <input type="radio" style="float: left;" name="documents" id="Checkbox10" value="no"
                        runat="server" />
                    <label style="width: 25px!important;" class="checkbox">
                        <%=GetResourceString("c_HSGParent")%>
                    </label>
                    <input type="radio" style="float: left;" cheked name="documents" id="Radio1" value="yes"
                        runat="server" />
                    <label style="width: 35px!important;" class="checkbox">
                        <%=GetResourceString("c_HSGStudent")%>
                    </label>
                    <input type="radio" style="float: left;" name="documents" id="Radio2" value="no"
                        runat="server" />
                    <label style="width: 25px!important;" class="checkbox">
                        <%=GetResourceString("c_HSGParent")%>
                    </label>

You can see I have two checkboxes and two radio buttons, My problem is that on my submit button click I want to check whether user have checked at-least one checkbox or radio button. It will be good if we can have .NET solution like (customvalidator).

Please suggest!

Thanks

Scott Ivey · Accepted Answer · 2010-05-10 13:21:33Z

4

First, add a CustomValidator to your page...

<asp:CustomValidator runat="server" ID="CheckBoxRequired" EnableClientScript="true" 
    OnServerValidate="CheckBoxRequired_ServerValidate" 
    OnClientValidate="CheckBoxRequired_ClientValidate">*</asp:CustomValidator>

You can then then validate them from a client side function with a simple jquery call...

<script type="text/javascript>

function CheckBoxRequired_ClientValidate(sender, e) 
{ 
    e.IsValid = $("input[name='documents']").is(':checked'); 
} 

</script>

code-behind for server side validation...

protected void CheckBoxRequired_ServerValidate(object sender, ServerValidateEventArgs e) 
{ 
    e.IsValid = Checkbox9.Checked || Checkbox10.Checked || Radio1.Checked || Radio2.Checked;
}

edited May 10, 2010 at 13:21

answered May 10, 2010 at 13:04

Scott Ivey

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Coding Flow · Accepted Answer · 2010-05-10 13:01:08Z

0

Create a custom validator and then check wether the controls meet the criteria in the servervalidate event handler.

answered May 10, 2010 at 13:01

Coding Flow

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