Control.BackgroundImage 属性

获取或设置在控件中显示的背景图像。

**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）

语法

声明
<LocalizableAttribute(True)> _
Public Overridable Property BackgroundImage As Image
用法
Dim instance As Control
Dim value As Image

value = instance.BackgroundImage

instance.BackgroundImage = value

[LocalizableAttribute(true)] 
public virtual Image BackgroundImage { get; set; }

[LocalizableAttribute(true)] 
public:
virtual property Image^ BackgroundImage {
    Image^ get ();
    void set (Image^ value);
}

/** @property */
public Image get_BackgroundImage ()

/** @property */
public void set_BackgroundImage (Image value)

public function get BackgroundImage () : Image

public function set BackgroundImage (value : Image)

属性值

一个 Image，它表示在控件的背景中显示的图像。

备注

• 使用 BackgroundImage 属性将图形图像放到控件上。

提示

Windows 窗体控件不支持带有半透明或透明颜色的图像作为背景图像。

RightToLeftLayout 属性设置为 true 的子控件不支持此属性。

给继承者的说明 在派生类中重写 BackgroundImage 属性时，请使用基类的 BackgroundImage 属性来扩展基实现。否则，您必须提供所有实现。不需要同时重写 BackgroundImage 属性的 get 和 set 访问器；如果需要，可以只重写其中一个访问器。

示例

下面的代码示例将 Button 添加到窗体并设置该控件的一些通用属性。示例将该按钮定位在窗体的右下角，因此调整窗体大小时其相对位置不变。接着，它设置 BackgroundImage 并将该按钮的大小调整为与 Image 同样的大小。然后，该示例将 TabStop 设置为 true，并设置 TabIndex 属性。最后，它添加一个事件处理程序以处理按钮的 Click 事件。此示例要求您有一个名为 imageList1 的 ImageList。

' 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

// 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:
   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.set_Anchor(AnchorStyles.Bottom | AnchorStyles.Right);
    // Assign a background image.
    button1.set_BackgroundImage(imageList1.get_Images().get_Item(0));
    // Specify the layout style of the background image. Tile is the 
    // default.
    button1.set_BackgroundImageLayout(ImageLayout.Center);
    // Make the button the same size as the image.
    button1.set_Size(button1.get_BackgroundImage().get_Size());
    // Set the button's TabIndex and TabStop properties.
    button1.set_TabIndex(1);
    button1.set_TabStop(true);
    // Add a delegate to handle the Click event.
    button1.add_Click(new System.EventHandler(this.button1_Click));
    // Add the button to the form.
    this.get_Controls().Add(button1);
} //AddMyButton

平台

Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

Control 类
Control 成员
System.Windows.Forms 命名空间
Image
BackgroundImageChanged
BackgroundImageLayout
BackgroundImageLayoutChanged
OnBackgroundImageChanged
OnBackgroundImageLayoutChanged