TreeNode.GetNodeCount(Boolean) 方法
重要
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返回子树节点的数目。
public:
int GetNodeCount(bool includeSubTrees);public int GetNodeCount (bool includeSubTrees);member this.GetNodeCount : bool -> intPublic Function GetNodeCount (includeSubTrees As Boolean) As Integer- includeSubTrees
- Boolean
如果所得计数包括不直接以此树节点为根的所有树节点，则为 true；否则为 false。
分配给 Nodes 集合的子树节点的数目。
下面的代码示例设置 PathSeparator 的 TreeView 属性，并显示 包含在 TreeNodeCollection 中的 SelectedNode子树节点数。 还会显示树视图控件中子树节点占树节点总数的百分比。 此示例要求具有 FormButton具有 的 ， TreeView 而控件包含 TreeNodeCollection 多个 TreeNode 对象 (最好具有三个或更多级别的) 。
void myButton_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
// Set the tree view's PathSeparator property.
myTreeView->PathSeparator = ".";
// Get the count of the child tree nodes contained in the SelectedNode.
int myNodeCount = myTreeView->SelectedNode->GetNodeCount( true );
Decimal myChildPercentage = ((Decimal)myNodeCount / (Decimal)myTreeView->GetNodeCount( true )) * 100;
// Display the tree node path and the number of child nodes it and the tree view have.
MessageBox::Show( String::Concat( "The '", myTreeView->SelectedNode->FullPath, "' node has ", myNodeCount, " child nodes.\nThat is ", String::Format( "{0:###.##}", myChildPercentage ), "% of the total tree nodes in the tree view control." ) );
}
private void myButton_Click(object sender, System.EventArgs e)
{
// Set the tree view's PathSeparator property.
myTreeView.PathSeparator = ".";
// Get the count of the child tree nodes contained in the SelectedNode.
int myNodeCount = myTreeView.SelectedNode.GetNodeCount(true);
decimal myChildPercentage = ((decimal)myNodeCount/
(decimal)myTreeView.GetNodeCount(true)) * 100;
// Display the tree node path and the number of child nodes it and the tree view have.
MessageBox.Show("The '" + myTreeView.SelectedNode.FullPath + "' node has "
+ myNodeCount.ToString() + " child nodes.\nThat is "
+ string.Format("{0:###.##}", myChildPercentage)
+ "% of the total tree nodes in the tree view control.");
}
Private Sub myButton_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles myButton.Click
' Set the tree view's PathSeparator property.
myTreeView.PathSeparator = "."
' Get the count of the child tree nodes contained in the SelectedNode.
Dim myNodeCount As Integer = myTreeView.SelectedNode.GetNodeCount(True)
Dim myChildPercentage As Decimal = CDec(myNodeCount) / _
CDec(myTreeView.GetNodeCount(True)) * 100
' Display the tree node path and the number of child nodes it and the tree view have.
MessageBox.Show(("The '" + myTreeView.SelectedNode.FullPath + "' node has " _
+ myNodeCount.ToString() + " child nodes." + Microsoft.VisualBasic.ControlChars.Lf _
+ "That is " + String.Format("{0:###.##}", myChildPercentage) _
+ "% of the total tree nodes in the tree view control."))
End Sub
| 产品 | 版本 |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
