Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / XmlDataSourceNodeDescriptor.cs / 1 / XmlDataSourceNodeDescriptor.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- 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; ////// internal sealed class XmlDataSourceNodeDescriptor : ICustomTypeDescriptor, IXPathNavigable { private XmlNode _node; ////// Creates a new instance of XmlDataSourceView. /// 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.Listlist = new System.Collections.Generic.List (); 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; } } } }
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