1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
//------------------------------------------------------------------------------
// <copyright file="XmlDataSourceNodeDescriptor.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.Data;
using System.Drawing.Design;
using System.Security.Permissions;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.Util;
using System.Xml;
using System.Xml.XPath;
using AttributeCollection = System.ComponentModel.AttributeCollection;
/// <devdoc>
/// </devdoc>
internal sealed class XmlDataSourceNodeDescriptor : ICustomTypeDescriptor, IXPathNavigable {
private XmlNode _node;
/// <devdoc>
/// Creates a new instance of XmlDataSourceView.
/// </devdoc>
public XmlDataSourceNodeDescriptor(XmlNode node) {
Debug.Assert(node != null, "Did not expect null node");
_node = node;
}
AttributeCollection ICustomTypeDescriptor.GetAttributes() {
return AttributeCollection.Empty;
}
string ICustomTypeDescriptor.GetClassName() {
return GetType().Name;
}
string ICustomTypeDescriptor.GetComponentName() {
return null;
}
TypeConverter ICustomTypeDescriptor.GetConverter() {
return null;
}
EventDescriptor ICustomTypeDescriptor.GetDefaultEvent() {
return null;
}
PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty() {
return null;
}
object ICustomTypeDescriptor.GetEditor(Type editorBaseType) {
return null;
}
EventDescriptorCollection ICustomTypeDescriptor.GetEvents() {
return null;
}
EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attrs) {
return null;
}
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties() {
return ((ICustomTypeDescriptor)this).GetProperties(null);
}
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attrFilter) {
System.Collections.Generic.List<PropertyDescriptor> list = new System.Collections.Generic.List<PropertyDescriptor>();
XmlAttributeCollection attrs = _node.Attributes;
if (attrs != null) {
for (int i = 0; i < attrs.Count; i++) {
list.Add(new XmlDataSourcePropertyDescriptor(attrs[i].Name));
}
}
return new PropertyDescriptorCollection(list.ToArray());
}
object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd) {
if (pd is XmlDataSourcePropertyDescriptor) {
return this;
}
return null;
}
XPathNavigator IXPathNavigable.CreateNavigator() {
return _node.CreateNavigator();
}
private class XmlDataSourcePropertyDescriptor : PropertyDescriptor {
private string _name;
public XmlDataSourcePropertyDescriptor(string name) : base(name, null) {
_name = name;
}
public override Type ComponentType {
get {
return typeof(XmlDataSourceNodeDescriptor);
}
}
public override bool IsReadOnly {
get {
return true;
}
}
public override Type PropertyType {
get {
return typeof(string);
}
}
public override bool CanResetValue(object o) {
return false;
}
public override object GetValue(object o) {
XmlDataSourceNodeDescriptor node = o as XmlDataSourceNodeDescriptor;
if (node != null) {
XmlAttributeCollection attrs = node._node.Attributes;
if (attrs != null) {
XmlAttribute attr = attrs[_name];
if (attr != null) {
return attr.Value;
}
}
}
return String.Empty;
}
public override void ResetValue(object o) {
}
public override void SetValue(object o, object value) {
}
public override bool ShouldSerializeValue(object o) {
return true;
}
}
}
}
|
