WebPartTracker.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 / fx / src / xsp / System / Web / UI / WebParts / WebPartTracker.cs / 1305376 / WebPartTracker.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 
namespace System.Web.UI.WebControls.WebParts {
 
    using System; 
    using System.Collections;
    using System.ComponentModel; 
    using System.Diagnostics;
    using System.Drawing.Design;
    using System.Web;
    using System.Web.UI; 

    public sealed class WebPartTracker : IDisposable { 
        private bool _disposed; 
        private WebPart _webPart;
        private ProviderConnectionPoint _providerConnectionPoint; 

        public WebPartTracker(WebPart webPart, ProviderConnectionPoint providerConnectionPoint) {
            if (webPart == null) {
                throw new ArgumentNullException("webPart"); 
            }
 
            if (providerConnectionPoint == null) { 
                throw new ArgumentNullException("providerConnectionPoint");
            } 

            if (providerConnectionPoint.ControlType != webPart.GetType()) {
                throw new ArgumentException(SR.GetString(SR.WebPartManager_InvalidConnectionPoint), "providerConnectionPoint");
            } 

            _webPart = webPart; 
            _providerConnectionPoint = providerConnectionPoint; 

            if (++Count > 1) { 
                webPart.SetConnectErrorMessage(SR.GetString(
                    SR.WebPartTracker_CircularConnection, _providerConnectionPoint.DisplayName));
            }
        } 

        public bool IsCircularConnection { 
            get { 
                return (Count > 1);
            } 
        }

        private int Count {
            get { 
                int count;
                _webPart.TrackerCounter.TryGetValue(_providerConnectionPoint, out count); 
                return count; 
            }
            set { 
                _webPart.TrackerCounter[_providerConnectionPoint] = value;
            }
        }
 
        void IDisposable.Dispose() {
            if (!_disposed) { 
                Debug.Assert(Count >= 1); 
                Count--;
                _disposed = true; 
            }
        }
    }
} 

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

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