ToolStripItem.AllowDrop Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Mendapatkan atau mengatur nilai yang menunjukkan apakah pengurutan ulang seret dan letakkan dan item ditangani melalui peristiwa yang Anda terapkan.

public:
 virtual property bool AllowDrop { bool get(); void set(bool value); };

[System.ComponentModel.Browsable(false)]
public virtual bool AllowDrop { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.AllowDrop : bool with get, set

Public Overridable Property AllowDrop As Boolean

Nilai Properti

Boolean

true jika operasi seret dan letakkan diizinkan dalam kontrol; jika tidak, false. Default adalah false.

Atribut

BrowsableAttribute

Pengecualian

ArgumentException

AllowDrop dan AllowItemReorder keduanya diatur ke true.

Contoh

Contoh kode berikut menunjukkan cara mengatur AllowDrop properti . Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk ToolStripItem kelas .

// This utility method creates a RolloverItem 
// and adds it to a ToolStrip control.
private RolloverItem CreateRolloverItem(
    ToolStrip owningToolStrip,
    string txt,
    Font f,
    string imgKey,
    TextImageRelation tir,
    string backImgKey)
{
    RolloverItem item = new RolloverItem();

    item.Alignment = ToolStripItemAlignment.Left;
    item.AllowDrop = false;
    item.AutoSize = true;

    item.BackgroundImage = owningToolStrip.ImageList.Images[backImgKey];
    item.BackgroundImageLayout = ImageLayout.Center;
    item.DisplayStyle = ToolStripItemDisplayStyle.ImageAndText;
    item.DoubleClickEnabled = true;
    item.Enabled = true;
    item.Font = f;

    // These assignments are equivalent. Each assigns an
    // image from the owning toolstrip's image list.
    item.ImageKey = imgKey;
    //item.Image = owningToolStrip.ImageList.Images[infoIconKey];
    //item.ImageIndex = owningToolStrip.ImageList.Images.IndexOfKey(infoIconKey);
    item.ImageScaling = ToolStripItemImageScaling.None;

    item.Owner = owningToolStrip;
    item.Padding = new Padding(2);
    item.Text = txt;
    item.TextAlign = ContentAlignment.MiddleLeft;
    item.TextDirection = ToolStripTextDirection.Horizontal;
    item.TextImageRelation = tir;

    return item;
}

' This utility method creates a RolloverItem 
' and adds it to a ToolStrip control.
 Private Function CreateRolloverItem( _
 ByVal owningToolStrip As ToolStrip, _
 ByVal txt As String, _
 ByVal f As Font, _
 ByVal imgKey As String, _
 ByVal tir As TextImageRelation, _
 ByVal backImgKey As String) As RolloverItem

     Dim item As New RolloverItem()

     item.Alignment = ToolStripItemAlignment.Left
     item.AllowDrop = False
     item.AutoSize = True

     item.BackgroundImage = owningToolStrip.ImageList.Images(backImgKey)
     item.BackgroundImageLayout = ImageLayout.Center
     item.DisplayStyle = ToolStripItemDisplayStyle.ImageAndText
     item.DoubleClickEnabled = True
     item.Enabled = True
     item.Font = f

     ' These assignments are equivalent. Each assigns an
     ' image from the owning toolstrip's image list.
     item.ImageKey = imgKey
     'item.Image = owningToolStrip.ImageList.Images[infoIconKey];
     'item.ImageIndex = owningToolStrip.ImageList.Images.IndexOfKey(infoIconKey);
     item.ImageScaling = ToolStripItemImageScaling.None

     item.Owner = owningToolStrip
     item.Padding = New Padding(2)
     item.Text = txt
     item.TextAlign = ContentAlignment.MiddleLeft
     item.TextDirection = ToolStripTextDirection.Horizontal
     item.TextImageRelation = tir

     Return item
 End Function

Keterangan

AllowDrop Atur properti ke true dan atur AllowItemReorder properti untuk false merespons perilaku seret dan letakkan yang telah Anda tentukan dalam ToolStripItem.DragEnterperistiwa , ToolStripItem.DragLeave, dan ToolStripItem.DragDrop .

AllowDrop Atur properti ke false dan atur AllowItemReorder properti ke true untuk menyebabkan ToolStripItem kelas menangani seret dan letakkan dan pengurutan ulang item secara privat.

Mengatur properti AllowDrop dan AllowItemReorder untuk true melemparkan pengecualian.