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//------------------------------------------------------------------------------
// <copyright file="WebPartCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls.WebParts {
using System;
using System.Collections;
using System.Diagnostics;
using System.Globalization;
/// <devdoc>
/// Read-only collection of WebParts. Collection cannot be modified after contstruction.
/// </devdoc>
public sealed class WebPartCollection : ReadOnlyCollectionBase {
public WebPartCollection() {
}
public WebPartCollection(ICollection webParts) {
if (webParts == null) {
throw new ArgumentNullException("webParts");
}
foreach (object obj in webParts) {
if (obj == null) {
throw new ArgumentException(SR.GetString(SR.Collection_CantAddNull), "webParts");
}
if (!(obj is WebPart)) {
throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPart"), "webParts");
}
InnerList.Add(obj);
}
}
internal int Add(WebPart value) {
Debug.Assert(value != null);
return InnerList.Add(value);
}
public bool Contains(WebPart value) {
return InnerList.Contains(value);
}
public int IndexOf(WebPart value) {
return InnerList.IndexOf(value);
}
public WebPart this[int index] {
get {
return (WebPart) InnerList[index];
}
}
/// <devdoc>
/// Returns the WebPart with the specified id, or the GenericWebPart containing a control with
/// the specified id, or the ProxyWebPart with OriginalID or GenericWebPartID equal to the
/// specified id, performing a case-insensitive comparison. Returns null if there are no matches.
/// </devdoc>
public WebPart this[string id] {
// PERF: Use a hashtable for lookup, instead of a linear search
get {
foreach (WebPart webPart in InnerList) {
if (String.Equals(webPart.ID, id, StringComparison.OrdinalIgnoreCase)) {
return webPart;
}
GenericWebPart genericWebPart = webPart as GenericWebPart;
if (genericWebPart != null) {
Control control = genericWebPart.ChildControl;
if (control != null) {
if (String.Equals(control.ID, id, StringComparison.OrdinalIgnoreCase)) {
return genericWebPart;
}
}
}
ProxyWebPart proxyWebPart = webPart as ProxyWebPart;
if (proxyWebPart != null) {
if ((String.Equals(proxyWebPart.OriginalID, id, StringComparison.OrdinalIgnoreCase)) ||
(String.Equals(proxyWebPart.GenericWebPartID, id, StringComparison.OrdinalIgnoreCase))) {
return proxyWebPart;
}
}
}
return null;
}
}
/// <devdoc>
/// <para>Copies contents from the collection to a specified array with a
/// specified starting index.</para>
/// </devdoc>
public void CopyTo(WebPart[] array, int index) {
InnerList.CopyTo(array, index);
}
}
}
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