Control.BackgroundImage 屬性

定義

取得或設定在控制項中顯示的背景影像。Gets or sets the background image displayed in the control.

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; }
member this.BackgroundImage : System.Drawing.Image with get, set
Public Overridable Property BackgroundImage As Image

屬性值

表示要在控制項背景中顯示之影像的 ImageAn Image that represents the image to display in the background of the control.

範例

下列程式碼範例會將 Button 新增至表單,並設定其一些通用屬性。The following code example adds a Button to a form and sets some of its common properties. 這個範例會將按鈕錨定表單右下角,讓它在調整大小表單時保持相對位置。The example anchors the button to the bottom-right corner of the form so it keeps its relative position as the form is resized. 接下來,它會設定 BackgroundImage,並將按鈕大小調整為與 Image 相同的大小。Next it sets the BackgroundImage and resizes the button to the same size as the Image. 然後,此範例會將 TabStop 設定為 true,並設定 TabIndex 屬性。The example then sets the TabStop to true and sets the TabIndex property. 最後,它會加入事件處理常式來處理按鈕的 Click 事件。Lastly, it adds an event handler to handle the Click event of the button. 這個範例需要您的 ImageList,名為 imageList1This example requires that you have an ImageList named imageList1.

   // 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 控制項不支援具有半透明或透明色彩的影像做為背景影像。Images with translucent or transparent colors are not supported by Windows Forms controls as background images.

當子控制項的 RightToLeftLayout 屬性為 true 時,不支援這個屬性。This property is not supported on child controls whose RightToLeftLayout property is true.

給繼承者的注意事項

覆寫衍生類別中的 BackgroundImage 屬性時,請使用基類的 BackgroundImage 屬性來擴充基底的執行。When overriding the BackgroundImage property in a derived class, use the base class's BackgroundImage property to extend the base implementation. 否則,您必須提供所有的實作為。Otherwise, you must provide all the implementation. 您不需要覆寫 BackgroundImage 屬性的 getset 存取子;您可以視需要覆寫其中一個。You are not required to override both the get and set accessors of the BackgroundImage property; you can override only one if needed.

適用於

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