DataBindingCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / DataBindingCollection.cs / 1305376 / DataBindingCollection.cs

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

namespace System.Web.UI { 
 
    using System;
    using System.Collections; 
    using System.Collections.Specialized;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Data; 
    using System.Web.Util;
    using System.Security.Permissions; 
 

    ///  
    /// 
    public sealed class DataBindingCollection : ICollection {
        private EventHandler changedEvent;
 
        private Hashtable bindings;
        private Hashtable removedBindings; 
 

        ///  
        /// 
        public DataBindingCollection() {
            this.bindings = new Hashtable(StringComparer.OrdinalIgnoreCase);
        } 

 
        ///  
        /// 
        public int Count { 
            get {
                return bindings.Count;
            }
        } 

 
        ///  
        /// 
        public bool IsReadOnly { 
            get {
                return false;
            }
        } 

 
        ///  
        /// 
        public bool IsSynchronized { 
            get {
                return false;
            }
        } 

 
        ///  
        /// 
        public string[] RemovedBindings { 
            get {
                int bindingCount = 0;
                ICollection keys = null;
 
                if (removedBindings != null) {
                    keys = removedBindings.Keys; 
                    bindingCount = keys.Count; 

                    string[] removedNames = new string[bindingCount]; 
                    int i = 0;

                    foreach (string s in keys) {
                        removedNames[i++] = s; 
                    }
 
                    removedBindings.Clear(); 
                    return removedNames;
                } 
                else {
                    return new string[0];
                }
            } 
        }
 
 
        /// 
        ///  
        private Hashtable RemovedBindingsTable {
            get {
                if (removedBindings == null) {
                    removedBindings = new Hashtable(StringComparer.OrdinalIgnoreCase); 
                }
                return removedBindings; 
            } 
        }
 

        /// 
        /// 
        public object SyncRoot { 
            get {
                return this; 
            } 
        }
 

        /// 
        /// 
        public DataBinding this[string propertyName] { 
            get {
                object o = bindings[propertyName]; 
                if (o != null) 
                    return(DataBinding)o;
                return null; 
            }
        }

 
        public event EventHandler Changed {
            add { 
                changedEvent = (EventHandler)Delegate.Combine(changedEvent, value); 
            }
            remove { 
                changedEvent = (EventHandler)Delegate.Remove(changedEvent, value);
            }
        }
 

 
        ///  
        /// 
        public void Add(DataBinding binding) { 
            bindings[binding.PropertyName] = binding;
            RemovedBindingsTable.Remove(binding.PropertyName);

            OnChanged(); 
        }
 
 
        /// 
        ///  
        public bool Contains(string propertyName) {
            return bindings.Contains(propertyName);
        }
 

        ///  
        ///  
        public void Clear() {
            ICollection keys = bindings.Keys; 
            if ((keys.Count != 0) && (removedBindings == null)) {
                // ensure the removedBindings hashtable is created
                Hashtable h = RemovedBindingsTable;
            } 
            foreach (string s in keys) {
                removedBindings[s] = String.Empty; 
            } 

            bindings.Clear(); 

            OnChanged();
        }
 

        ///  
        ///  
        public void CopyTo(Array array, int index) {
            for (IEnumerator e = this.GetEnumerator(); e.MoveNext();) 
                array.SetValue(e.Current, index++);
        }

 
        /// 
        ///  
        public IEnumerator GetEnumerator() { 
            return bindings.Values.GetEnumerator();
        } 

        private void OnChanged() {
            if (changedEvent != null) {
                changedEvent(this, EventArgs.Empty); 
            }
        } 
 

        ///  
        /// 
        public void Remove(string propertyName) {
            Remove(propertyName, true);
        } 

 
        ///  
        /// 
        public void Remove(DataBinding binding) { 
            Remove(binding.PropertyName, true);
        }

 
        /// 
        ///  
        public void Remove(string propertyName, bool addToRemovedList) { 
            if (Contains(propertyName)) {
                bindings.Remove(propertyName); 
                if (addToRemovedList) {
                    RemovedBindingsTable[propertyName] = String.Empty;
                }
 
                OnChanged();
            } 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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