Software/Visual_Studio/SideChains/MaterialDesignInXamlToolkit-master/MainDemo.Wpf/Domain/NotEmptyValidationRule.cs


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using System.Globalization;
using System.Windows.Controls;

namespace MaterialDesignDemo.Domain
{
	public class NotEmptyValidationRule : ValidationRule
	{
		public override ValidationResult Validate(object value, CultureInfo cultureInfo)
		{
			return string.IsNullOrWhiteSpace((value ?? "").ToString())
				? new ValidationResult(false, "Field is required.")
				: ValidationResult.ValidResult;
		}
	}
}