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.net C# VS 2005 - check box validation (more then one checkbox)

Posted on 2007-03-29
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Last Modified: 2013-12-17
.net C# VS 2005 - check box validation (more then one checkbox)
Using .net standard server side validation controls.
 I need to validate that at  least one of my 5 checkboxes has been selected (checked) and tie this into an
existing validation group control.

help!
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Question by:RSSIAdmin
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by:
igor_alpha earned 500 total points
ID: 18833958
Hi RSSIAdmin,
You need to add customvalidator control and code ServerValidate event handler.
For example if you have checkboxes placed in CheckBoxList you can iterate them and detect that one of them is selected:
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
        {
            args.IsValid = false;
            foreach(ListItem li in CheckBoxList1.Items)
            {
                if(li.Selected)
                {
                    args.IsValid = true;
                    break;
                }
            }
        }

If you have independent CheckBoxes you can write if/then statement to check all of them:
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
        {
args.IsValid = false;
            if(CheckBox1.Checked)
            {
                args.IsValid = true;
            }
            else if (CheckBox2.Checked)
            {
                args.IsValid = true;
            }
           // else if .... etc...
}
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