Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / TreeNodeBindingCollection.cs / 1 / TreeNodeBindingCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls { using System; using System.Collections; using System.ComponentModel; using System.Security.Permissions; using System.Web; ////// Provides a collection of TreeNodeBinding objects /// [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class TreeNodeBindingCollection : StateManagedCollection { private static readonly Type[] knownTypes = new Type[] { typeof(TreeNodeBinding) }; private TreeNodeBinding _defaultBinding; internal TreeNodeBindingCollection() { } ////// Gets the TreeNodeBinding at the specified index /// public TreeNodeBinding this[int i] { get { return (TreeNodeBinding)((IList)this)[i]; } set { ((IList)this)[i] = value; } } ////// Adds a TreeNodeBinding to the collection /// public int Add(TreeNodeBinding binding) { return ((IList)this).Add(binding); } public bool Contains(TreeNodeBinding binding) { return ((IList)this).Contains(binding); } public void CopyTo(TreeNodeBinding[] bindingArray, int index) { base.CopyTo(bindingArray, index); } protected override object CreateKnownType(int index) { return new TreeNodeBinding(); } private void FindDefaultBinding() { _defaultBinding = null; // Look for another binding that would be a good default foreach (TreeNodeBinding binding in this) { if (binding.Depth == -1 && binding.DataMember.Length == 0) { _defaultBinding = binding; break; } } } ////// Gets a TreeNodeBinding data binding definition for the specified depth or datamember /// internal TreeNodeBinding GetBinding(string dataMember, int depth) { TreeNodeBinding bestMatch = null; int match = 0; if ((dataMember != null) && (dataMember.Length == 0)) { dataMember = null; } foreach (TreeNodeBinding binding in this) { if ((binding.Depth == depth)) { if (String.Equals(binding.DataMember, dataMember, StringComparison.CurrentCultureIgnoreCase)) { return binding; } else if ((match < 1) && (binding.DataMember.Length == 0)) { bestMatch = binding; match = 1; } } else if (String.Equals(binding.DataMember, dataMember, StringComparison.CurrentCultureIgnoreCase) && (match < 2) && (binding.Depth == -1)) { bestMatch = binding; match = 2; } } if (bestMatch == null) { // Check that the default binding is still suitable (VSWhidbey 358817) if (_defaultBinding != null) { if (_defaultBinding.Depth != -1 || _defaultBinding.DataMember.Length != 0) { // Look for another binding that would be a good default FindDefaultBinding(); } bestMatch = _defaultBinding; } } return bestMatch; } protected override Type[] GetKnownTypes() { return knownTypes; } public int IndexOf(TreeNodeBinding binding) { return ((IList)this).IndexOf(binding); } public void Insert(int index, TreeNodeBinding binding) { ((IList)this).Insert(index, binding); } protected override void OnClear() { base.OnClear(); _defaultBinding = null; } protected override void OnRemoveComplete(int index, object value) { if (value == _defaultBinding) { FindDefaultBinding(); } } protected override void OnValidate(object value) { base.OnValidate(value); TreeNodeBinding binding = value as TreeNodeBinding; if ((binding != null) && (binding.DataMember.Length == 0) && (binding.Depth == -1)) { _defaultBinding = binding; } } ////// Removes a TreeNodeBinding from the collection. /// public void Remove(TreeNodeBinding binding) { ((IList)this).Remove(binding); } ////// Removes a TreeNodeBinding from the collection at a given index. /// public void RemoveAt(int index) { ((IList)this).RemoveAt(index); } protected override void SetDirtyObject(object o) { if (o is TreeNodeBinding) { ((TreeNodeBinding)o).SetDirty(); } } } }
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