ProxyWebPartConnectionCollection.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 / ProxyWebPartConnectionCollection.cs / 1 / ProxyWebPartConnectionCollection.cs

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

namespace System.Web.UI.WebControls.WebParts { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Drawing.Design;
    using System.Globalization;
    using System.Security.Permissions; 
    using System.Web.Util;
 
    [ 
    Editor("System.ComponentModel.Design.CollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor))
    ] 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public sealed class ProxyWebPartConnectionCollection : CollectionBase {

        private WebPartManager _webPartManager; 

        public bool IsReadOnly { 
            get { 
                if (_webPartManager != null) {
                    return _webPartManager.StaticConnections.IsReadOnly; 
                }
                else {
                    // This collection is never read-only before _webPartManager is set
                    return false; 
                }
            } 
        } 

        public WebPartConnection this[int index] { 
            get {
                return (WebPartConnection)List[index];
            }
            set { 
                List[index] = value;
            } 
        } 

        // Returns the WebPartConnection with the specified id, performing a case-insensitive comparison. 
        // Returns null if there are no matches.
        public WebPartConnection this[string id] {
            // PERF: Use a hashtable for lookup, instead of a linear search
            get { 
                foreach (WebPartConnection connection in List) {
                    if (connection != null && String.Equals(connection.ID, id, StringComparison.OrdinalIgnoreCase)) { 
                        return connection; 
                    }
                } 

                return null;
            }
        } 

        public int Add(WebPartConnection value) { 
            return List.Add(value); 
        }
 
        private void CheckReadOnly() {
            if (IsReadOnly) {
                throw new InvalidOperationException(SR.GetString(SR.ProxyWebPartConnectionCollection_ReadOnly));
            } 
        }
 
        public bool Contains(WebPartConnection value) { 
            return List.Contains(value);
        } 

        public void CopyTo(WebPartConnection[] array, int index) {
            List.CopyTo(array, index);
        } 

        public int IndexOf(WebPartConnection value) { 
            return List.IndexOf(value); 
        }
 
        public void Insert(int index, WebPartConnection value) {
            List.Insert(index, value);
        }
 
        protected override void OnClear() {
            CheckReadOnly(); 
            if (_webPartManager != null) { 
                // Remove all of the connections in this collection from the main WebPartManager
                foreach (WebPartConnection connection in this) { 
                    _webPartManager.StaticConnections.Remove(connection);
                }
            }
            base.OnClear(); 
        }
 
        protected override void OnInsert(int index, object value) { 
            CheckReadOnly();
            if (_webPartManager != null) { 
                _webPartManager.StaticConnections.Insert(index, (WebPartConnection)value);
            }
            base.OnInsert(index, value);
        } 

        protected override void OnRemove(int index, object value) { 
            CheckReadOnly(); 
            if (_webPartManager != null) {
                _webPartManager.StaticConnections.Remove((WebPartConnection)value); 
            }
            base.OnRemove(index, value);
        }
 
        protected override void OnSet(int index, object oldValue, object newValue) {
            CheckReadOnly(); 
            if (_webPartManager != null) { 
                int webPartManagerIndex = _webPartManager.StaticConnections.IndexOf((WebPartConnection)oldValue);
                // It is a bug if the main WebPartManager does not contain the oldValue 
                Debug.Assert(webPartManagerIndex >= 0);
                _webPartManager.StaticConnections[webPartManagerIndex] = (WebPartConnection)newValue;
            }
            base.OnSet(index, oldValue, newValue); 
        }
 
        // Validates that an object is a WebPartConnection. 
        protected override void OnValidate(object value) {
            base.OnValidate(value); 
            if (value == null) {
                throw new ArgumentNullException("value", SR.GetString(SR.Collection_CantAddNull));
            }
            if (!(value is WebPartConnection)) { 
                throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPartConnection"));
            } 
        } 

        public void Remove(WebPartConnection value) { 
            List.Remove(value);
        }

        internal void SetWebPartManager(WebPartManager webPartManager) { 
            // This method should only be called once in the lifetime of the ProxyWebPartConnectionCollection
            Debug.Assert(_webPartManager == null); 
 
            Debug.Assert(webPartManager != null);
 
            _webPartManager = webPartManager;

            // When the _webPartManager is first set, add all the connections in this collection
            // to the main WebPartManager 
            foreach (WebPartConnection connection in this) {
                _webPartManager.StaticConnections.Add(connection); 
            } 
        }
    } 
}
                        

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