IHierarchyData.Type 属性
定义
public:
property System::String ^ Type { System::String ^ get(); };
public string Type { get; }
member this.Type : string
Public ReadOnly Property Type As String
属性值
IHierarchyData 对象表示的对象的类型的名称。The name of the type of object that the IHierarchyData object represents.
示例
下面的代码示例演示如何将基本属性写入 IHierarchyData HttpResponse 流,然后使用属性检查对象的类型, IHierarchyData Type 并强制转换对象以执行更多类型特定的操作。The following code example demonstrates how to write the basic IHierarchyData properties to an HttpResponse stream, then check the type of an IHierarchyData object using the Type property and cast the object to perform more type-specific operations. 此代码示例是为接口提供的更大示例的一部分 IHierarchyData 。This code example is part of a larger example provided for the IHierarchyData interface.
// Print out the current data node, then iterate through its
// children and do the same.
private void PrintFullChildNodeInfo(IHierarchyData node)
{
string whitespace = " ";
string br = "<BR>";
Response.Write(node.ToString() + br);
Response.Write(whitespace + node.Path + br);
// Check for specific types and perform extended functions.
if (node.Type == "SiteMapNode")
{
// Because SiteMapNode implements the IHierarchyData interface,
// the IHierarchyData object can be cast directly as a SiteMapNode,
// rather than accessing the Item property for the object that
// the Type property identifies.
SiteMapNode siteNode = node.Item as SiteMapNode;
Response.Write(whitespace + siteNode.Url + br);
Response.Write(whitespace + siteNode.Description + br);
}
else if (node.Type == "SomeBusinessObject")
{
// If the IHierarchyData instance is a wrapper class on a business
// object of some kind, you can retrieve the business object by using
// the IHierarchyData.Item property.
// SomeBusinessObject busObj = node.Item as SomeBusinessObject;
}
if (node.HasChildren)
{
IEnumerator children = ((IHierarchicalEnumerable)node.GetChildren()).GetEnumerator();
while (children.MoveNext())
{
// Print out SiteMapNode Titles recursively.
IHierarchyData hierarchicalNode = node.GetChildren().GetHierarchyData(children.Current);
PrintFullChildNodeInfo(hierarchicalNode);
}
}
}
' Print out the current data node, then iterate through its
' children and do the same.
Private Sub PrintFullChildNodeInfo(ByVal node As IHierarchyData)
Dim whitespace As String = " "
Dim br As String = "<BR>"
Response.Write(Convert.ToString(node) & br)
Response.Write(whitespace & node.Path & br)
' Check for specific types and perform extended functions.
If node.Type = "SiteMapNode" Then
' Because SiteMapNode implements the IHierarchyData interface,
' the IHierarchyData object can be cast directly as a SiteMapNode,
' rather than accessing the Item property for the object that
' the Type property identifies.
Dim siteNode As SiteMapNode = CType(node.Item, SiteMapNode)
Response.Write(whitespace & siteNode.Url & br)
Response.Write(whitespace & siteNode.Description & br)
ElseIf node.Type = "SomeBusinessObject Then" Then
' If the IHierarchyData instance is a wrapper class on a business
' object of some kind, you can retrieve the business object by using
' the IHierarchyData.Item property.
' SomeBusinessObject busObj = node.Item as SomeBusinessObject;
End If
If node.HasChildren Then
Dim children As IEnumerator = CType(node.GetChildren().GetEnumerator(), IHierarchicalEnumerable)
While children.MoveNext()
' Print out SiteMapNode Titles recursively.
Dim hierarchicalNode As IHierarchyData = node.GetChildren().GetHierarchyData(children.Current)
PrintFullChildNodeInfo(hierarchicalNode)
End While
End If
End Sub
注解
Type属性不返回 System.Type 对象中表示的对象的 IHierarchyData 。The Type property does not return the System.Type of the object represented in an IHierarchyData object. 它将返回数据绑定控件使用的名称,以区分层次结构中具有不同可绑定属性的项。It returns a name used by data-bound controls to differentiate between items in a hierarchy that have different bindable properties.