TreeNode 构造函数 (String)的C#例子
下面的代码示例演示如何使用此构造函数将节点动态添加到 TreeView 控件。
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<%@ Page Language="C#" %>
2
3<SCRIPT runat="server">
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5 void Page_Init(Object sender, EventArgs e)
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{
7
8 if(!IsPostBack)
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{
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11 // Add the first tree to the TreeView control.
12 CreateTree("Section 1");
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14 // Add the second tree to the TreeView control.
15 CreateTree("Section 2");
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}
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}
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21 void CreateTree(String NodeText)
22 {
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24 // Create the root node using the default constructor.
25 TreeNode root = new TreeNode();
26 root.Text = NodeText;
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28 // Use the ChildNodes property of the root TreeNode to add child nodes.
29 // Create the node using the constructor that takes the text parameter.
30 root.ChildNodes.Add(new TreeNode("Topic 1"));
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32 // Create the node using the constructor that takes the text and value parameters.
33 root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));
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35 // Create the node using the constructor that takes the text, value,
36 // and imageUrl parameters.
37 root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));
38
39 // Create the node using the constructor that takes the text, value,
40 // imageUrl, navigateUrl, and target parameters.
41 root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));
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43 // Add the root node to the Nodes collection of the TreeView control.
44 DynamicTreeView.Nodes.Add(root);
45
46 }
47
48</SCRIPT>
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50<HTML>
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52 <FORM runat="server">
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54 <H3>TreeNode Constructor Example</H3>
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56 <ASP:TREEVIEW id=DynamicTreeView runat="server" InitialExpandDepth="2" EnableClientScript="false">
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58 </ASP:TREEVIEW>
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60 </FORM>
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<%@ Page Language="C#" %> 2
3
<SCRIPT runat="server"> 4
5
void Page_Init(Object sender, EventArgs e) 6
{ 
7
8
if(!IsPostBack) 9
{ 
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11
// Add the first tree to the TreeView control. 12
CreateTree("Section 1"); 13
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// Add the second tree to the TreeView control. 15
CreateTree("Section 2"); 16
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} 18
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} 20
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void CreateTree(String NodeText) 22
{ 
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// Create the root node using the default constructor. 25
TreeNode root = new TreeNode(); 26
root.Text = NodeText; 27
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// Use the ChildNodes property of the root TreeNode to add child nodes. 29
// Create the node using the constructor that takes the text parameter. 30
root.ChildNodes.Add(new TreeNode("Topic 1")); 31
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// Create the node using the constructor that takes the text and value parameters. 33
root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2")); 34
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// Create the node using the constructor that takes the text, value, 36
// and imageUrl parameters. 37
root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg")); 38
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// Create the node using the constructor that takes the text, value, 40
// imageUrl, navigateUrl, and target parameters. 41
root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank")); 42
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// Add the root node to the Nodes collection of the TreeView control. 44
DynamicTreeView.Nodes.Add(root); 45
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} 47
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</SCRIPT> 49
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<HTML> 51
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<FORM runat="server"> 53
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<H3>TreeNode Constructor Example</H3> 55
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<ASP:TREEVIEW id=DynamicTreeView runat="server" InitialExpandDepth="2" EnableClientScript="false"> 57
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</ASP:TREEVIEW> 59
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</FORM> 61
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