// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
 
//
// Description:
//      ExceptionValidationRule is used when a ValidationError is the result of an Exception as
//      there is no actual ValidationRule.
//
//
// See specs at Validation.mht
//
 
using System;
using System.Windows;
using System.Globalization;
using System.Windows.Controls;
 
namespace System.Windows.Controls
{
    /// <summary>
    ///     ExceptionValidationRule can be added to the ValidationRulesCollection of a Binding
    ///     or MultiBinding to indicate that Exceptions that occur during UpdateSource should
    ///     be considered ValidationErrors
    /// </summary>
    public sealed class ExceptionValidationRule : ValidationRule
    {
        /// <summary>
        /// ExceptionValidationRule ctor.
        /// </summary>
        public ExceptionValidationRule()
        {
        }
 
        /// <summary>
        /// Validate is called when Data binding is updating
        /// </summary>
        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
        {
            return ValidationResult.ValidResult;
        }
 
        internal static readonly ExceptionValidationRule Instance = new ExceptionValidationRule();
    }
}