DataGrid.BackgroundColorChanged 事件

在 BackgroundColor 更改后发生。

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

语法

声明
Public Event BackgroundColorChanged As EventHandler
用法
Dim instance As DataGrid
Dim handler As EventHandler

AddHandler instance.BackgroundColorChanged, handler

public event EventHandler BackgroundColorChanged

public:
event EventHandler^ BackgroundColorChanged {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}

/** @event */
public void add_BackgroundColorChanged (EventHandler value)

/** @event */
public void remove_BackgroundColorChanged (EventHandler value)

JScript 支持使用事件，但不支持进行新的声明。

备注

有关处理事件的更多信息，请参见 使用事件。

示例

下面的代码示例将 BackgroundColor 属性值从黄色更改为红色，并引发 BackgroundColorChanged 事件。

' Create an instance of the 'BackgroundColorChanged' EventHandler.
Private Sub CallBackgroundColorChanged()
   AddHandler myDataGrid.BackgroundColorChanged, AddressOf Grid_ColChange
End Sub 'CallBackgroundColorChanged


' Set the 'BackgroundColor' property on click of button.
 Private Sub myButton_Click(ByVal sender As Object, ByVal e As EventArgs)
     If op_Equality(myDataGrid.BackgroundColor, Color.Yellow) Then
         myDataGrid.BackgroundColor = Color.Red
     Else
         myDataGrid.BackgroundColor = Color.Yellow
     End If
 End Sub 'myButton_Click


' Raise the event when 'Background' color of DataGrid changes.
 Private Sub Grid_ColChange(ByVal sender As Object, ByVal e As EventArgs)
     ' String variable used to show message.
     Dim myString As String = "BackgroundColorChanged event raised, changed to "
     ' Get the background color of DataGrid.
     Dim myColor As Color = myDataGrid.BackgroundColor
     myString += myColor.ToString()
     ' Show information about background color setting.
     MessageBox.Show(myString, "Background color information")
 End Sub 'Grid_ColChange

// Create an instance of the 'BackgroundColorChanged' EventHandler.
private void CallBackgroundColorChanged()
{
   myDataGrid.BackgroundColorChanged += new EventHandler(Grid_ColChange);
}

// Set the 'BackgroundColor' property on click of button.
private void myButton_Click(object sender, EventArgs e)
{
   if (myDataGrid.BackgroundColor == Color.Yellow)
   {
      myDataGrid.BackgroundColor = Color.Red;
   }
   else
   {
      myDataGrid.BackgroundColor = Color.Yellow;
   }
}

// Raise the event when 'Background' color of DataGrid changes.
private void Grid_ColChange(object sender, EventArgs e)
{
   // String variable used to show message.
   string myString = "BackgroundColorChanged event raised, changed to ";
   // Get the background color of DataGrid.
   Color myColor = myDataGrid.BackgroundColor;
   myString += myColor.ToString();
   // Show information about background color setting.
   MessageBox.Show(myString, "Background color information");
}

   // Create an instance of the 'BackgroundColorChanged' EventHandler.
private:
   void CallBackgroundColorChanged()
   {
      myDataGrid->BackgroundColorChanged += gcnew EventHandler( this, &MyDataGrid::Grid_ColChange );
   }

   // Set the 'BackgroundColor' property on click of button.
   void myButton_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      if ( myDataGrid->BackgroundColor == Color::Yellow )
      {
         myDataGrid->BackgroundColor = Color::Red;
      }
      else
      {
         myDataGrid->BackgroundColor = Color::Yellow;
      }
   }

   // Raise the event when 'Background' color of DataGrid changes.
   void Grid_ColChange( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      // String variable used to show message.
      String^ myString = "BackgroundColorChanged event raised, changed to ";

      // Get the background color of DataGrid.
      Color myColor = myDataGrid->BackgroundColor;
      myString = String::Concat( myString, myColor );

      // Show information about background color setting.
      MessageBox::Show( myString, "Background color information" );
   }

// Create an instance of the 'BackgroundColorChanged' EventHandler.
private void CallBackgroundColorChanged()
{
    myDataGrid.add_BackgroundColorChanged(new EventHandler(GridColChange));
} //CallBackgroundColorChanged

// Set the 'BackgroundColor' property on click of button.
protected void myButton_Click(Object sender, EventArgs e)
{
    if (myDataGrid.get_BackgroundColor().Equals(Color.get_Yellow())) {
        myDataGrid.set_BackgroundColor(Color.get_Red());
    }
    else {
        myDataGrid.set_BackgroundColor(Color.get_Yellow());
    }
} //myButton_Click

// Raise the event when 'Background' color of DataGrid changes.
protected void GridColChange(Object sender, EventArgs e)
{
    // String variable used to show message.
    String myString = "BackgroundColorChanged event raised, changed to ";

    // Get the background color of DataGrid.
    Color myColor = myDataGrid.get_BackgroundColor();

    myString += myColor.ToString();

    // Show information about background color setting.
    MessageBox.Show(myString, "Background color information");
} //GridColChange

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

DataGrid 类
DataGrid 成员
System.Windows.Forms 命名空间