Control.BackgroundImage 屬性

  • 參考

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

取得或設定在控制項中顯示的背景影像。

public:
 virtual property System::Drawing::Image ^ BackgroundImage { System::Drawing::Image ^ get(); void set(System::Drawing::Image ^ value); };
public virtual System.Drawing.Image BackgroundImage { get; set; }
public virtual System.Drawing.Image? BackgroundImage { get; set; }
member this.BackgroundImage : System.Drawing.Image with get, set
Public Overridable Property BackgroundImage As Image

屬性值

Image

表示要在控制項背景中顯示之影像的 Image。

範例

下列程式碼範例會將 新增 Button 至表單，並設定其一些通用屬性。 此範例會將按鈕錨定在表單右下角，讓它在表單調整大小時保留其相對位置。 接下來，它會將 和 按鈕的大小設定 BackgroundImage 為與 Image 相同的大小。 此範例接著會將 TabStop 設定為 true ，並設定 TabIndex 屬性。 最後，它會新增事件處理常式來處理 Click 按鈕的事件。 此範例需要您有 ImageList 名為 imageList1 的 。

   // Add a button to a form and set some of its common properties.
private:
   void AddMyButton()
   {
      // Create a button and add it to the form.
      Button^ button1 = gcnew Button;

      // Anchor the button to the bottom right corner of the form
      button1->Anchor = static_cast<AnchorStyles>(AnchorStyles::Bottom | AnchorStyles::Right);

      // Assign a background image.
      button1->BackgroundImage = imageList1->Images[ 0 ];

      // Specify the layout style of the background image. Tile is the default.
      button1->BackgroundImageLayout = ImageLayout::Center;

      // Make the button the same size as the image.
      button1->Size = button1->BackgroundImage->Size;

      // Set the button's TabIndex and TabStop properties.
      button1->TabIndex = 1;
      button1->TabStop = true;

      // Add a delegate to handle the Click event.
      button1->Click += gcnew System::EventHandler( this, &Form1::button1_Click );

      // Add the button to the form.
      this->Controls->Add( button1 );
   }

// Add a button to a form and set some of its common properties.
private void AddMyButton()
{
   // Create a button and add it to the form.
   Button button1 = new Button();

   // Anchor the button to the bottom right corner of the form
   button1.Anchor = (AnchorStyles.Bottom | AnchorStyles.Right);

   // Assign a background image.
   button1.BackgroundImage = imageList1.Images[0];

   // Specify the layout style of the background image. Tile is the default.
   button1.BackgroundImageLayout = ImageLayout.Center;
   
   // Make the button the same size as the image.
   button1.Size = button1.BackgroundImage.Size;

   // Set the button's TabIndex and TabStop properties.
   button1.TabIndex = 1;
   button1.TabStop = true;

   // Add a delegate to handle the Click event.
   button1.Click += new System.EventHandler(this.button1_Click);

   // Add the button to the form.
   this.Controls.Add(button1);
}

' Add a button to a form and set some of its common properties.
Private Sub AddMyButton()
   ' Create a button and add it to the form.
   Dim button1 As New Button()
   
   ' Anchor the button to the bottom right corner of the form
   button1.Anchor = AnchorStyles.Bottom Or AnchorStyles.Right
   
   ' Assign a background image.
   button1.BackgroundImage = imageList1.Images(0)

   ' Specify the layout style of the background image. Tile is the default.
   button1.BackgroundImageLayout = ImageLayout.Center
   
   ' Make the button the same size as the image.
   button1.Size = button1.BackgroundImage.Size
   
   ' Set the button's TabIndex and TabStop properties.
   button1.TabIndex = 1
   button1.TabStop = True

   ' Add a delegate to handle the Click event.
   AddHandler button1.Click, AddressOf Me.button1_Click
   
   ' Add the button to the form.
   Me.Controls.Add(button1)
End Sub

備註

注意

Windows Forms控制項不支援具有透明或透明色彩的影像做為背景影像。

屬性為 true 的子控制項 RightToLeftLayout 不支援這個屬性。

給繼承者的注意事項

在衍生類別中覆 BackgroundImage 寫 屬性時，請使用基類的 BackgroundImage 屬性來擴充基底實作。 否則，您必須提供所有實作。 您不需要同時覆寫 get 屬性的 BackgroundImage 和 set 存取子;您可以視需要只覆寫一個。

適用於

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