WebPartDisplayModeCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / WebPartDisplayModeCollection.cs / 1 / WebPartDisplayModeCollection.cs
                        

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

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.Security.Permissions;

    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    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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