FlowNode.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 / Statements / FlowNode.cs / 1305376 / FlowNode.cs
                        

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

namespace System.Activities.Statements 
{
    using System.Collections.Generic; 
    using System.Activities; 
    using System.ComponentModel;
 
    public abstract class FlowNode
    {
        Flowchart owner;
        int cacheId; 

        internal FlowNode() 
        { 
            Index = -1;
        } 

        internal int Index
        {
            get; 
            set;
        } 
 
        internal bool IsOpen
        { 
            get
            {
                return this.owner != null;
            } 
        }
 
        internal Flowchart Owner 
        {
            get 
            {
                return this.owner;
            }
        } 

        // Returns true if this is the first time we've visited this node during this pass 
        internal bool Open(Flowchart owner, NativeActivityMetadata metadata) 
        {
            if (this.cacheId == owner.CacheId) 
            {
                // We've already visited this node during this pass
                if (!object.ReferenceEquals(this.owner, owner))
                { 
                    metadata.AddValidationError(SR.FlowNodeCannotBeShared(this.owner.DisplayName, owner.DisplayName));
                } 
 
                // Whether we found an issue or not we don't want to change
                // the metadata during this pass. 
                return false;
            }

            OnOpen(owner, metadata); 

            this.owner = owner; 
            this.cacheId = owner.CacheId; 
            this.Index = -1;
 
            return true;
        }

        internal abstract void OnOpen(Flowchart owner, NativeActivityMetadata metadata); 

        internal virtual void GetChildActivities(ICollection children) 
        { 
        }
 
        internal abstract void GetConnectedNodes(IList connections);
    }
}

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

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