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//------------------------------------------------------------------------------
// <copyright file="WebPartDisplayModeCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls.WebParts {
using System;
using System.Collections;
public sealed class WebPartDisplayModeCollection : CollectionBase {
private bool _readOnly;
private string _readOnlyExceptionMessage;
// Prevent instantiation outside of our assembly. We want third-part code to use the collection
// returned by the base method, not create a new collection.
internal WebPartDisplayModeCollection() {
}
public bool IsReadOnly {
get {
return _readOnly;
}
}
public WebPartDisplayMode this[int index] {
get {
return (WebPartDisplayMode)List[index];
}
}
public WebPartDisplayMode this[string modeName] {
get {
foreach (WebPartDisplayMode displayMode in List) {
if (String.Equals(displayMode.Name, modeName, StringComparison.OrdinalIgnoreCase)) {
return displayMode;
}
}
return null;
}
}
public int Add(WebPartDisplayMode value) {
return List.Add(value);
}
internal int AddInternal(WebPartDisplayMode value) {
bool isReadOnly = _readOnly;
_readOnly = false;
// Extra try-catch block to prevent elevation of privilege attack via exception filter
try {
try {
return List.Add(value);
}
finally {
_readOnly = isReadOnly;
}
}
catch {
throw;
}
}
private void CheckReadOnly() {
if (_readOnly) {
throw new InvalidOperationException(SR.GetString(_readOnlyExceptionMessage));
}
}
public bool Contains(WebPartDisplayMode value) {
return List.Contains(value);
}
public void CopyTo(WebPartDisplayMode[] array, int index) {
List.CopyTo(array, index);
}
public int IndexOf(WebPartDisplayMode value) {
return List.IndexOf(value);
}
public void Insert(int index, WebPartDisplayMode value) {
List.Insert(index, value);
}
protected override void OnClear() {
throw new InvalidOperationException(SR.GetString(SR.WebPartDisplayModeCollection_CantRemove));
}
protected override void OnInsert(int index, object value) {
CheckReadOnly();
WebPartDisplayMode displayMode = (WebPartDisplayMode)value;
foreach (WebPartDisplayMode existingDisplayMode in List) {
if (displayMode.Name == existingDisplayMode.Name) {
throw new ArgumentException(SR.GetString(SR.WebPartDisplayModeCollection_DuplicateName, displayMode.Name));
}
}
base.OnInsert(index, value);
}
protected override void OnRemove(int index, object value) {
throw new InvalidOperationException(SR.GetString(SR.WebPartDisplayModeCollection_CantRemove));
}
protected override void OnSet(int index, object oldValue, object newValue) {
throw new InvalidOperationException(SR.GetString(SR.WebPartDisplayModeCollection_CantSet));
}
protected override void OnValidate(object value) {
base.OnValidate(value);
if (value == null) {
throw new ArgumentNullException("value", SR.GetString(SR.Collection_CantAddNull));
}
if (!(value is WebPartDisplayMode)) {
throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPartDisplayMode"), "value");
}
}
internal void SetReadOnly(string exceptionMessage) {
_readOnlyExceptionMessage = exceptionMessage;
_readOnly = true;
}
}
}
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