Question

i have two text boxes which the user should enter one of them
i wanna to use a validator which act exactly like Required Validator ,
as when the user press Submit the red alert written by the controls
any ideas

Thanks in advance

Answer 1

there is no built-in Validator that can do that, you will have to build a custom one:

try this:

or you could try using the code behind and use onclick event to validate the textboxes and then return an error inside a span, like this:

    protected void Button1_Click(object sender, EventArgs e)
{
    if (TextBox1.Text == null) 
    {
        if (TextBox2.Text == null) 
        {
            errorMsg.InnerText = "Error" //use a span with runat server
        }
    }
}