ValidatingCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / System.Runtime.DurableInstancing / System / Runtime / Collections / ValidatingCollection.cs / 1305376 / ValidatingCollection.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Runtime.Collections 
{
    using System.Collections.ObjectModel; 
 
    // simple helper class to allow passing in a func that performs validations of
    // acceptible values 
    class ValidatingCollection : Collection
    {
        public ValidatingCollection()
        { 
        }
 
        public Action OnAddValidationCallback { get; set; } 
        public Action OnMutateValidationCallback { get; set; }
 
        void OnAdd(T item)
        {
            if (OnAddValidationCallback != null)
            { 
                OnAddValidationCallback(item);
            } 
        } 

        void OnMutate() 
        {
            if (OnMutateValidationCallback != null)
            {
                OnMutateValidationCallback(); 
            }
        } 
 
        protected override void ClearItems()
        { 
            OnMutate();
            base.ClearItems();
        }
 
        protected override void InsertItem(int index, T item)
        { 
            OnAdd(item); 
            base.InsertItem(index, item);
        } 

        protected override void RemoveItem(int index)
        {
            OnMutate(); 
            base.RemoveItem(index);
        } 
 
        protected override void SetItem(int index, T item)
        { 
            OnAdd(item);
            OnMutate();
            base.SetItem(index, item);
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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