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//------------------------------------------------------------------------------
// <copyright file="TreeNodeBindingCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.Collections;
using System.ComponentModel;
using System.Web;
/// <devdoc>
/// Provides a collection of TreeNodeBinding objects
/// </devdoc>
public sealed class TreeNodeBindingCollection : StateManagedCollection {
private static readonly Type[] knownTypes = new Type[] { typeof(TreeNodeBinding) };
private TreeNodeBinding _defaultBinding;
internal TreeNodeBindingCollection() {
}
/// <devdoc>
/// Gets the TreeNodeBinding at the specified index
/// </devdoc>
public TreeNodeBinding this[int i] {
get {
return (TreeNodeBinding)((IList)this)[i];
}
set {
((IList)this)[i] = value;
}
}
/// <devdoc>
/// Adds a TreeNodeBinding to the collection
/// </devdoc>
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;
}
}
}
/// <devdoc>
/// Gets a TreeNodeBinding data binding definition for the specified depth or datamember
/// </devdoc>
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;
}
}
/// <devdoc>
/// Removes a TreeNodeBinding from the collection.
/// </devdoc>
public void Remove(TreeNodeBinding binding) {
((IList)this).Remove(binding);
}
/// <devdoc>
/// Removes a TreeNodeBinding from the collection at a given index.
/// </devdoc>
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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