Splitter.MinExtra Property

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Gets or sets the minimum distance that must remain between the splitter control and the edge of the opposite side of the container (or the closest control docked to that side). MinExtra has been replaced by similar properties in SplitContainer and is provided only for compatibility with previous versions.

public:
 property int MinExtra { int get(); void set(int value); };

public int MinExtra { get; set; }

member this.MinExtra : int with get, set

Public Property MinExtra As Integer

Property Value

Int32

The minimum distance, in pixels, between the Splitter control and the edge of the opposite side of the container (or the closest control docked to that side). The default is 25.

Examples

The following code example uses a Splitter control in combination with TreeView and ListView controls to create a window similar to Windows Explorer. To identify the TreeView and ListView controls, nodes and items are added to both controls. The example uses the MinExtra and MinSize properties of the Splitter to prevent the TreeView or ListView control from being sized too small or too large. This example requires that the method created in this example is defined within a Form and that the method is called from the constructor of the Form.

private:
   void CreateMySplitControls()
   {
      // Create TreeView, ListView, and Splitter controls.
      TreeView^ treeView1 = gcnew TreeView;
      ListView^ listView1 = gcnew ListView;
      Splitter^ splitter1 = gcnew Splitter;

      // Set the TreeView control to dock to the left side of the form.
      treeView1->Dock = DockStyle::Left;

      // Set the Splitter to dock to the left side of the TreeView control.
      splitter1->Dock = DockStyle::Left;

      // Set the minimum size the ListView control can be sized to.
      splitter1->MinExtra = 100;

      // Set the minimum size the TreeView control can be sized to.
      splitter1->MinSize = 75;

      // Set the ListView control to fill the remaining space on the form.
      listView1->Dock = DockStyle::Fill;

      // Add a TreeView and a ListView item to identify the controls on the form.
      treeView1->Nodes->Add( "TreeView Node" );
      listView1->Items->Add( "ListView Item" );

      // Add the controls in reverse order to the form to ensure proper location.
      array<Control^>^temp0 = {listView1,splitter1,treeView1};
      this->Controls->AddRange( temp0 );
   }

private void CreateMySplitControls()
{
    // Create TreeView, ListView, and Splitter controls.
    TreeView treeView1 = new TreeView();
    ListView listView1 = new ListView();
    Splitter splitter1 = new Splitter();

    // Set the TreeView control to dock to the left side of the form.
    treeView1.Dock = DockStyle.Left;
    // Set the Splitter to dock to the left side of the TreeView control.
    splitter1.Dock = DockStyle.Left;
    // Set the minimum size the ListView control can be sized to.
    splitter1.MinExtra = 100;
    // Set the minimum size the TreeView control can be sized to.
    splitter1.MinSize = 75;
    // Set the ListView control to fill the remaining space on the form.
    listView1.Dock = DockStyle.Fill;
    // Add a TreeView and a ListView item to identify the controls on the form.
    treeView1.Nodes.Add("TreeView Node");
    listView1.Items.Add("ListView Item");

    // Add the controls in reverse order to the form to ensure proper location.
    this.Controls.AddRange(new Control[]{listView1, splitter1, treeView1});
}

Private Sub CreateMySplitControls()
   ' Create TreeView, ListView, and Splitter controls.
   Dim treeView1 As New TreeView()
   Dim listView1 As New ListView()
   Dim splitter1 As New Splitter()
   
   ' Set the TreeView control to dock to the left side of the form.
   treeView1.Dock = DockStyle.Left
   ' Set the Splitter to dock to the left side of the TreeView control.
   splitter1.Dock = DockStyle.Left
   ' Set the minimum size the ListView control can be sized to.
      splitter1.MinExtra = 100
   ' Set the minimum size the TreeView control can be sized to.
      splitter1.MinSize = 75
   ' Set the ListView control to fill the remaining space on the form.
      listView1.Dock = DockStyle.Fill

      ' Add a TreeView and a ListView item to identify the controls on the form.
      treeView1.Nodes.Add("TreeView Node")
      listView1.Items.Add("ListView Item")
   
   ' Add the controls in reverse order to the form to ensure proper location.
   Me.Controls.AddRange(New Control() {listView1, splitter1, treeView1})
End Sub

Remarks

For a horizontal Splitter control (a Splitter control docked to the top or bottom of a container), the minimum height of the area of the container reserved for undocked controls is this value minus the height of the Splitter control. For a vertical Splitter control (a Splitter control docked to the left or right of a container), the minimum width of the area of the container reserved for undocked controls is this value minus the width of the Splitter control. The user cannot move the splitter past the limit specified by this property.

Note

If the MinExtra property is set to a negative value, the property value is reset to 0.

See also

• MinSize