TreeView.ItemHeight Property
Definition
Important
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Gets or sets the height of each tree node in the tree view control.
public:
property int ItemHeight { int get(); void set(int value); };
public int ItemHeight { get; set; }
member this.ItemHeight : int with get, set
Public Property ItemHeight As Integer
Property Value
The height, in pixels, of each tree node in the tree view.
Exceptions
The assigned value is less than one.
-or-
The assigned value is greater than the Int16.MaxValue value.
Examples
The following code example changes the size NodeFont to the specified size and adjusts the ItemHeight of the tree node's parent TreeView control. This example requires that you have a Form with a TreeView control with a collection of TreeNode objects, and a ComboBox that contains font sizes.
private:
void Button1_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
{
myTreeView->ItemHeight = 5;
myTreeView->SelectedNode->NodeFont = gcnew System::Drawing::Font( "Arial",5 );
// Get the font size from combobox.
String^ selectedString = myComboBox->SelectedItem->ToString();
int myNodeFontSize = Int32::Parse( selectedString );
// Set the font of root node.
myTreeView->SelectedNode->NodeFont = gcnew System::Drawing::Font( "Arial",(float)myNodeFontSize );
for ( int i = 0; i < myTreeView->Nodes[ 0 ]->Nodes->Count; i++ )
{
// Set the font of child nodes.
myTreeView->Nodes[ 0 ]->Nodes[ i ]->NodeFont = gcnew System::Drawing::Font( "Arial",(float)myNodeFontSize );
}
// Get the bounds of the tree node.
Rectangle myRectangle = myTreeView->SelectedNode->Bounds;
int myNodeHeight = myRectangle.Height;
if ( myNodeHeight < myNodeFontSize )
{
myNodeHeight = myNodeFontSize;
}
myTreeView->ItemHeight = myNodeHeight + 4;
}
private void Button1_Click(object sender,EventArgs e)
{
myTreeView.ItemHeight = 5;
myTreeView.SelectedNode.NodeFont = new Font("Arial",5);
// Get the font size from combobox.
string selectedString = myComboBox.SelectedItem.ToString();
int myNodeFontSize = Int32.Parse(selectedString);
// Set the font of root node.
myTreeView.SelectedNode.NodeFont = new Font("Arial",myNodeFontSize);
for(int i = 0; i < myTreeView.Nodes[0].Nodes.Count; i++)
{
// Set the font of child nodes.
myTreeView.Nodes[0].Nodes[i].NodeFont =
new Font("Arial",myNodeFontSize);
}
// Get the bounds of the tree node.
Rectangle myRectangle = myTreeView.SelectedNode.Bounds;
int myNodeHeight = myRectangle.Height;
if(myNodeHeight < myNodeFontSize)
{
myNodeHeight = myNodeFontSize;
}
myTreeView.ItemHeight = myNodeHeight + 4;
}
Private Sub Button1_Click(sender As Object, e As EventArgs)
myTreeView.ItemHeight = 5
myTreeView.SelectedNode.NodeFont = New Font("Arial", 5)
' Get the font size from combobox.
Dim selectedString As String = myComboBox.SelectedItem.ToString()
Dim myNodeFontSize As Integer = Int32.Parse(selectedString)
' Set the font of root node.
myTreeView.SelectedNode.NodeFont = New Font("Arial", myNodeFontSize)
Dim i As Integer
For i = 0 To (myTreeView.Nodes(0).Nodes.Count) - 1
' Set the font of child nodes.
myTreeView.Nodes(0).Nodes(i).NodeFont = New Font("Arial", _
myNodeFontSize)
Next i
' Get the bounds of the tree node.
Dim myRectangle As Rectangle = myTreeView.SelectedNode.Bounds
Dim myNodeHeight As Integer = myRectangle.Height
If myNodeHeight < myNodeFontSize Then
myNodeHeight = myNodeFontSize
End If
myTreeView.ItemHeight = myNodeHeight + 4
End Sub
Remarks
If the item height is set to a value larger than the height of the tree view control, calling the TreeNode.EnsureVisible method will have unexpected results.
Applies to
See also
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