DictionaryEditChange.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 / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / Model / DictionaryEditChange.cs / 1305376 / DictionaryEditChange.cs
                        

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

namespace System.Activities.Presentation.Model 
{
    using System; 
    using System.Collections.Generic; 
    using System.Text;
 
    class DictionaryEditChange : ModelChange
    {
        public ModelItemDictionary Dictionary { get; set; }
 
        public ModelItem Key { get; set; }
 
        public ModelItem OldValue { get; set; } 

        public ModelItem NewValue { get; set; } 

        public ModelTreeManager ModelTreeManager { get; set; }

 
        public override string Description
        { 
            get 
            {
                return SR.DictionaryEditEditingScopeDescription; 
            }
        }

        public override bool Apply() 
        {
            ModelItem oldValue = this.Dictionary[this.Key]; 
            if ((oldValue == null && this.NewValue == null) || 
               (oldValue != null && this.NewValue != null && oldValue.GetCurrentValue().Equals(this.NewValue.GetCurrentValue())))
            { 
                return false;
            }
            this.ModelTreeManager.ReAddModelItemToModelTree(this.NewValue);
            ((ModelItemDictionaryImpl)this.Dictionary).EditCore(this.Key, this.NewValue); 
            if (null != this.OldValue)
            { 
                this.ModelTreeManager.modelService.OnModelItemRemoved(this.OldValue); 
                ((IModelTreeItem)OldValue).RemoveParent(this.Dictionary);
                this.ModelTreeManager.ReleaseModelItem(this.OldValue, this.Dictionary); 
            }
            if (null != this.NewValue)
            {
                this.ModelTreeManager.modelService.OnModelItemAdded(this.NewValue); 
            }
            return true; 
        } 

 

        public override Change GetInverse()
        {
            return new DictionaryEditChange() 
                {
                    Dictionary = this.Dictionary, 
                    Key = this.Key, 
                    OldValue = this.NewValue,
                    NewValue = this.OldValue, 
                    ModelTreeManager = this.ModelTreeManager,
                };
        }
    } 
}

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

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