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//------------------------------------------------------------------------------
// <copyright file="WebPartTracker.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
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;
}
}
}
}
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