ToolStripDropDown.DefaultDropDownDirection 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

取得或設定 ToolStripDropDown 顯示的方向 (相對於 ToolStrip)。

public:
 virtual property System::Windows::Forms::ToolStripDropDownDirection DefaultDropDownDirection { System::Windows::Forms::ToolStripDropDownDirection get(); void set(System::Windows::Forms::ToolStripDropDownDirection value); };

public override System.Windows.Forms.ToolStripDropDownDirection DefaultDropDownDirection { get; set; }

member this.DefaultDropDownDirection : System.Windows.Forms.ToolStripDropDownDirection with get, set

Public Overrides Property DefaultDropDownDirection As ToolStripDropDownDirection

屬性值

ToolStripDropDownDirection

其中一個 ToolStripDropDownDirection 值。

範例

下列程式碼範例示範如何指派 DefaultDropDownDirection 選項按鈕設定所指定的屬性。

// The following methods handle the CheckChanged event 
// for all the radio buttons. Each method calls a utility
// method to set the ToolStripDropDownDirection appropriately.

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.AboveLeft);
}

private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.AboveRight);
}

private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.BelowLeft);
}

private void radioButton4_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.BelowRight);
}

private void radioButton5_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.Default);
}

private void radioButton6_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.Left);
}

private void radioButton7_CheckedChanged(object sender, EventArgs e)
{
    this.HandleRadioButton(sender, ToolStripDropDownDirection.Right);
}

// This utility method sets the DefaultDropDownDirection property.
private void HandleRadioButton(object sender, ToolStripDropDownDirection direction)
{
    RadioButton rb = sender as RadioButton;

    if (rb != null)
    {
        if (rb.Checked)
        {
            this.dropDownDirection = direction;
            this.contextMenuStrip1.DefaultDropDownDirection = direction;
        }
    }
}

' The following methods handle the CheckChanged event 
' for all the radio buttons. Each method calls a utility
' method to set the ToolStripDropDownDirection appropriately.
Private Sub radioButton1_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton1.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.AboveLeft)
 End Sub


Private Sub radioButton2_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton2.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.AboveRight)
 End Sub


Private Sub radioButton3_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton3.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.BelowLeft)
 End Sub


Private Sub radioButton4_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton4.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.BelowRight)
 End Sub


Private Sub radioButton5_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton5.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.Default)
 End Sub


Private Sub radioButton6_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton6.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.Left)
 End Sub


Private Sub radioButton7_CheckedChanged(sender As Object, e As EventArgs) Handles radioButton7.CheckedChanged
   Me.HandleRadioButton(sender, ToolStripDropDownDirection.Right)
 End Sub


 ' This utility method sets the DefaultDropDownDirection property.
Private Sub HandleRadioButton(sender As Object, direction As ToolStripDropDownDirection)
     Dim rb As RadioButton = CType(sender, RadioButton)
   
     If rb IsNot Nothing Then
         If rb.Checked Then
             Me.dropDownDirection = direction
             Me.contextMenuStrip1.DefaultDropDownDirection = direction
         End If
     End If
 End Sub