TreeNodeCollection.CopyTo(Array, Int32) 方法

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

將整個集合複製到現有陣列中的指定位置。

public:
 virtual void CopyTo(Array ^ dest, int index);

public void CopyTo (Array dest, int index);

abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit

Public Sub CopyTo (dest As Array, index As Integer)

參數

dest

Array

目的陣列。

index

Int32

目的陣列中開始儲存處的索引。

實作

CopyTo(Array, Int32)

範例

下列程式碼範例會顯示 中的 TreeNodeCollection 物件數目 TreeNode ，會將集合 Object 的內容複寫到陣列，並在 控制項中 Label 顯示樹狀節點的清單。 此範例要求您在其 TreeView 中 TreeNodeCollection 至少有一個 TreeNode 的 ，以及 Label 上的 Form 控制項。

void CopyTreeNodes()
{
   // Get the collection of TreeNodes.
   TreeNodeCollection^ myNodeCollection = myTreeView->Nodes;
   int myCount = myNodeCollection->Count;
   myLabel->Text = String::Concat( myLabel->Text, "Number of nodes in the collection : ", myCount );
   myLabel->Text = String::Concat( myLabel->Text, "\n\nElements of the Array after Copying from the collection :\n" );
   
   // Create an Object array.
   array<Object^>^myArray = gcnew array<Object^>(myCount);
   
   // Copy the collection into an array.
   myNodeCollection->CopyTo( myArray, 0 );
   for ( int i = 0; i < myArray->Length; i++ )
   {
      myLabel->Text = myLabel->Text + (dynamic_cast<TreeNode^>(myArray[ i ]))->Text + "\n";

   }
}

private void CopyTreeNodes()
{
   // Get the collection of TreeNodes.
   TreeNodeCollection myNodeCollection = myTreeView.Nodes;
   int myCount = myNodeCollection.Count;

   myLabel.Text += "Number of nodes in the collection :" + myCount;
   myLabel.Text += "\n\nElements of the Array after Copying from the collection :\n";
   // Create an Object array.
   Object[] myArray = new Object[myCount];
   // Copy the collection into an array.
   myNodeCollection.CopyTo(myArray,0);
   for(int i=0; i<myArray.Length; i++)
   {
      myLabel.Text += ((TreeNode)myArray[i]).Text + "\n";
   }
}

Private Sub CopyTreeNodes()
   ' Get the collection of TreeNodes.
   Dim myNodeCollection As TreeNodeCollection = myTreeView.Nodes
   Dim myCount As Integer = myNodeCollection.Count

   myLabel.Text += "Number of nodes in the collection :" + myCount.ToString()

   myLabel.Text += ControlChars.NewLine + ControlChars.NewLine + _
     "Elements of the Array after Copying from the collection :" + ControlChars.NewLine

   ' Create an Object array.
   Dim myArray(myCount -1) As Object

   ' Copy the collection into an array.
   myNodeCollection.CopyTo(myArray, 0)
   Dim i As Integer
   For i = 0 To myArray.Length - 1
      myLabel.Text += CType(myArray(i), TreeNode).Text + ControlChars.NewLine
   Next i
End Sub