Question

I have a simple validator that should check if the the date format is incorrect. I am doing testing and enter 2/14/201… which gets passed through my validator as 2/14/0201. How do I prevent this and jump to e.IsValid = false;?

protected void rangeVal(object sender, ServerValidateEventArgs e)
{
    DateTime dateCheck = txtDate1.Text.Trim();
    DateTime select;
    if (DateTime.TryParse(dateCheck, out select))
        e.IsValid = true;
    else
        e.IsValid = false;
}

Answer 1

Should dateCheck be a string instead of a DateTime?

If only dates > the year 1900 are valid, you could try:

if (DateTime.TryParse(dateCheck, out select) && dateCheck > default(DateTime))
    e.IsValid = true;
else
    e.IsValid = false;

and that might suit your requirement.