TreeNode.Checked Eigenschaft

Definition

Ruft einen Wert ab, der angibt, ob der Strukturknoten aktiviert ist, oder legt diesen fest.Gets or sets a value indicating whether the tree node is in a checked state.

public:
 property bool Checked { bool get(); void set(bool value); };
public bool Checked { get; set; }
member this.Checked : bool with get, set
Public Property Checked As Boolean

Eigenschaftswert

true, wenn der Strukturknoten aktiviert ist, andernfalls false.true if the tree node is in a checked state; otherwise, false.

Beispiele

Im folgenden Codebeispiel werden alle TreeNode Objekte eines TreeView -Steuer Elements, Checked dessen-Eigenschaft true auf festgelegt BackColor ist, Yellowdurch Festlegen der-Eigenschaft auf hervorgehoben.The following code example highlights any TreeNode objects a TreeView control that has its Checked property set to true by setting its BackColor property to Yellow. Dieser Code erfordert, dass Sie über TreeView ein-Steuer Form Element für eine mit TreeNode einer Auflistung von-Objekten verfügen.This code requires that you have a TreeView control on a Form with a collection of TreeNode objects.

public:
   void HighlightCheckedNodes()
   {
      int countIndex = 0;
      String^ selectedNode = "Selected customer nodes are : ";
      IEnumerator^ myEnum = myTreeView->Nodes[ 0 ]->Nodes->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         TreeNode^ myNode = safe_cast<TreeNode^>(myEnum->Current);
         
         // Check whether the tree node is checked.
         if ( myNode->Checked )
         {
            
            // Set the node's backColor.
            myNode->BackColor = Color::Yellow;
            selectedNode = String::Concat( selectedNode, myNode->Text, " " );
            countIndex++;
         }
         else
                  myNode->BackColor = Color::White;
      }

      if ( countIndex > 0 )
            MessageBox::Show( selectedNode );
      else
            MessageBox::Show( "No nodes are selected" );
   }
public void HighlightCheckedNodes()
{
   int countIndex = 0;
   string selectedNode = "Selected customer nodes are : ";
   foreach (TreeNode myNode in myTreeView.Nodes[0].Nodes)
   {
      // Check whether the tree node is checked.
      if(myNode.Checked)
      {
         // Set the node's backColor.
         myNode.BackColor = Color.Yellow;
         selectedNode += myNode.Text+" ";
         countIndex++;
      }
      else
         myNode.BackColor = Color.White;
   }

   if(countIndex > 0)
      MessageBox.Show(selectedNode);
   else
      MessageBox.Show("No nodes are selected");
}
Public Sub HighlightCheckedNodes()
   Dim countIndex As Integer = 0
   Dim selectedNode As String = "Selected customer nodes are : "
   Dim myNode As TreeNode
   For Each myNode In  myTreeView.Nodes(0).Nodes
      ' Check whether the tree node is checked.
      If myNode.Checked Then
         ' Set the node's backColor.
         myNode.BackColor = Color.Yellow
         selectedNode += myNode.Text + " "
         countIndex += 1
      Else
         myNode.BackColor = Color.White
      End If
   Next myNode

   If countIndex > 0 Then
      MessageBox.Show(selectedNode)
   Else
      MessageBox.Show("No nodes are selected")
   End If
End Sub

Gilt für:

Siehe auch