ToolStripDropDownItem.DropDown Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

ToolStripDropDownItem.cs

Mendapatkan atau mengatur ToolStripDropDown yang akan ditampilkan ketika ini ToolStripDropDownItem diklik.

public:
 property System::Windows::Forms::ToolStripDropDown ^ DropDown { System::Windows::Forms::ToolStripDropDown ^ get(); void set(System::Windows::Forms::ToolStripDropDown ^ value); };

[System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ReferenceConverter))]
public System.Windows.Forms.ToolStripDropDown DropDown { get; set; }

[<System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ReferenceConverter))>]
member this.DropDown : System.Windows.Forms.ToolStripDropDown with get, set

Public Property DropDown As ToolStripDropDown

Nilai Properti

ToolStripDropDown

ToolStripDropDown Yang terkait dengan ToolStripDropDownItem.

Atribut

TypeConverterAttribute

Contoh

Contoh kode berikut menunjukkan cara menetapkan ContextMenuStrip kontrol ke ToolStripDropDownItem properti kontrol DropDown . Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk ToolStripDropDownItem kelas .

// This utility method creates and initializes three 
// ToolStripDropDownItem controls and adds them 
// to the form's ToolStrip control.
private void InitializeToolStripDropDownItems()
{
    ToolStripDropDownButton b = new ToolStripDropDownButton("DropDownButton");
    b.DropDown = this.contextMenuStrip1;
    b.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
    b.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
    b.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

    ToolStripMenuItem m = new ToolStripMenuItem("MenuItem");
    m.DropDown = this.contextMenuStrip1;
    m.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
    m.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
    m.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

    ToolStripSplitButton sb = new ToolStripSplitButton("SplitButton");
    sb.DropDown = this.contextMenuStrip1;
    sb.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
    sb.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
    sb.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

    this.toolStrip1.Items.AddRange(new ToolStripItem[] { b, m, sb });
}

' This utility method creates and initializes three 
' ToolStripDropDownItem controls and adds them 
' to the form's ToolStrip control.
Private Sub InitializeToolStripDropDownItems()
   Dim b As New ToolStripDropDownButton("DropDownButton")
   b.DropDown = Me.contextMenuStrip1
   AddHandler b.DropDownClosed, AddressOf toolStripDropDownItem_DropDownClosed
   AddHandler b.DropDownItemClicked, AddressOf toolStripDropDownItem_DropDownItemClicked
   AddHandler b.DropDownOpened, AddressOf toolStripDropDownItem_DropDownOpened
   
   Dim m As New ToolStripMenuItem("MenuItem")
   m.DropDown = Me.contextMenuStrip1
   AddHandler m.DropDownClosed, AddressOf toolStripDropDownItem_DropDownClosed
   AddHandler m.DropDownItemClicked, AddressOf toolStripDropDownItem_DropDownItemClicked
   AddHandler m.DropDownOpened, AddressOf toolStripDropDownItem_DropDownOpened
   
   Dim sb As New ToolStripSplitButton("SplitButton")
   sb.DropDown = Me.contextMenuStrip1
   AddHandler sb.DropDownClosed, AddressOf toolStripDropDownItem_DropDownClosed
   AddHandler sb.DropDownItemClicked, AddressOf toolStripDropDownItem_DropDownItemClicked
   AddHandler sb.DropDownOpened, AddressOf toolStripDropDownItem_DropDownOpened
   
   Me.toolStrip1.Items.AddRange(New ToolStripItem() {b, m, sb})
End Sub

Keterangan

Jika tidak ada ToolStripDropDown yang terkait dengan ToolStripDropDownItem, panggilan untuk CreateDefaultDropDown membuat kontrol drop-down generik.

Nota

Jika kontrol drop-down dibuat secara otomatis, yang berarti bahwa item ditambahkan ke koleksi, dan Anda kemudian mengatur DropDown properti ke kontrol drop-down eksplisit, Anda mungkin kehilangan data.