AndAlso.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 / System.Activities / System / Activities / Expressions / AndAlso.cs / 1305376 / AndAlso.cs
                        

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

namespace System.Activities.Expressions 
{
    using System.Activities; 
    using System.Activities.Statements; 
    using System.ComponentModel;
    using System.Diagnostics.CodeAnalysis; 
    using System.Runtime;

    [SuppressMessage(FxCop.Category.Naming, FxCop.Rule.IdentifiersShouldNotMatchKeywords, Justification = "Optimizing for XAML naming. VB imperative users will [] qualify (e.g. New [AndAlso])")]
    public sealed class AndAlso : Activity 
    {
        public AndAlso() 
            : base() 
        {
           this.Implementation = 
               () =>
               {
                   if (this.Left != null && this.Right != null)
                   { 
                       return new If
                       { 
                           Condition = this.Left, 
                           Then = new Assign
                           { 
                               To = new OutArgument(context => this.Result.Get(context)),
                               Value = new InArgument(this.Right)
                           },
                           Else = new Assign 
                           {
                               To = new OutArgument(context => this.Result.Get(context)), 
                               Value = false, 
                           }
                       }; 
                   }
                   else
                   {
                       return null; 
                   }
               }; 
        } 

        [DefaultValue(null)] 
        public Activity Left
        {
            get;
            set; 
        }
 
        [DefaultValue(null)] 
        public Activity Right
        { 
            get;
            set;
        }
 
        protected override void CacheMetadata(ActivityMetadata metadata)
        { 
            metadata.AddImportedChild(this.Left); 
            metadata.AddImportedChild(this.Right);
 
            if (this.Left == null)
            {
                metadata.AddValidationError(SR.BinaryExpressionActivityRequiresArgument("Left", "AndAlso", this.DisplayName));
            } 

            if (this.Right == null) 
            { 
                metadata.AddValidationError(SR.BinaryExpressionActivityRequiresArgument("Right", "AndAlso", this.DisplayName));
            } 
        }
    }
}

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

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