DataGrid.HitTestType 枚举

  • 项目

指定 System.Windows.Forms.DataGrid 控件中用户单击的部分。

此枚举有一个 FlagsAttribute 属性，允许其成员值按位组合。

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

语法

声明
<FlagsAttribute> _
Public Enumeration HitTestType
用法
Dim instance As HitTestType

[FlagsAttribute] 
public enum HitTestType

[FlagsAttribute] 
public enum class HitTestType

/** @attribute FlagsAttribute() */ 
public enum HitTestType

FlagsAttribute 
public enum HitTestType

成员

  成员名称 说明
Caption System.Windows.Forms.DataGrid 控件的标题。 
由 .NET Compact Framework 支持 Cell System.Windows.Forms.DataGrid 控件中的单元格。 
由 .NET Compact Framework 支持 ColumnHeader System.Windows.Forms.DataGrid 控件中的列标题。 
由 .NET Compact Framework 支持 ColumnResize 列边框，它是列标题之间的线。可以拖动它来调整列的宽度。 
由 .NET Compact Framework 支持 None 当控件不包含表，或者包含的行很少时，或者当表滚动到其底部时可见的背景区域。 
ParentRows System.Windows.Forms.DataGrid 控件的父行区域。父行显示来自或关于当前显示的子表的父表信息，如父表的名称、列名和父记录的值。 
由 .NET Compact Framework 支持 RowHeader System.Windows.Forms.DataGrid 控件中的行标题。 
由 .NET Compact Framework 支持 RowResize 行边框，它是网格行标题之间的线。可以拖动它来调整行的高度。 

备注

使用此枚举的成员来确定网格中被单击的部分。DataGrid.HitTestInfo 的 Type 属性返回 DataGrid.HitTestType。DataGrid.HitTestInfo 是通过调用 System.Windows.Forms.DataGrid 控件的 HitTest 方法创建的。

示例

下面的示例使用 MouseDown 事件中的 HitTest 方法返回 DataGrid.HitTestInfo。然后打印行、列和网格的一部分。

Private Sub dataGrid1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)
    Dim newLine As String = ControlChars.Cr
    Console.WriteLine(newLine)
    Dim myHitTest As System.Windows.Forms.DataGrid.HitTestInfo
    ' Use the DataGrid control's HitTest method with the x and y properties.
    myHitTest = dataGrid1.HitTest(e.X, e.Y)
    Console.WriteLine(myHitTest)
    Console.WriteLine(("Column " & myHitTest.Column))
    Console.WriteLine(("Row " & myHitTest.Row))
    Console.WriteLine(("Type " & myHitTest.Type))
    Console.WriteLine(("ToString " & myHitTest.ToString()))
    Console.WriteLine(("Hit " & ReturnHitTest(myHitTest.Type)))
End Sub 'dataGrid1_MouseDown


Private Function ReturnHitTest(hit As System.Windows.Forms.DataGrid.HitTestType) As String
    ' Use this function to return the part of the grid clicked.   
    Select Case hit
        Case System.Windows.Forms.DataGrid.HitTestType.Cell
                Return "Cell"
        
        Case System.Windows.Forms.DataGrid.HitTestType.Caption
                Return "Caption"
        
        Case System.Windows.Forms.DataGrid.HitTestType.ColumnHeader
                Return "ColumnHeader"
        
        Case System.Windows.Forms.DataGrid.HitTestType.ColumnResize
                Return "Resize"
        
        Case System.Windows.Forms.DataGrid.HitTestType.ParentRows
                Return "ParentRows"
        
        Case System.Windows.Forms.DataGrid.HitTestType.RowHeader
                Return "RowHeader"
        
        Case System.Windows.Forms.DataGrid.HitTestType.RowResize
                Return "RowResize"
        
        Case System.Windows.Forms.DataGrid.HitTestType.None
                Return "None"
        Case Else
                Return "Unknown"
    End Select
End Function 'ReturnHitTest

private void dataGrid1_MouseDown
(object sender, System.Windows.Forms.MouseEventArgs e)
{
   string newLine = "\n";
   Console.WriteLine(newLine);
   System.Windows.Forms.DataGrid.HitTestInfo myHitTest;
   // Use the DataGrid control's HitTest method with the x and y properties.
   myHitTest = dataGrid1.HitTest(e.X,e.Y);
   Console.WriteLine(myHitTest);
   Console.WriteLine("Column " + myHitTest.Column);
   Console.WriteLine("Row " + myHitTest.Row);
   Console.WriteLine("Type " + myHitTest.Type);
   Console.WriteLine("ToString " + myHitTest.ToString());
   Console.WriteLine("Hit " + ReturnHitTest(myHitTest.Type ));
}
 
 private string ReturnHitTest(System.Windows.Forms.DataGrid.HitTestType  hit ){
    // Use this function to return the part of the grid clicked.   
    switch(hit) {
    case(System.Windows.Forms.DataGrid.HitTestType.Cell):
       return "Cell";
       
       
    case(System.Windows.Forms.DataGrid.HitTestType.Caption):
       return "Caption";
       
    case(System.Windows.Forms.DataGrid.HitTestType.ColumnHeader):
        return "ColumnHeader";
          
    case(System.Windows.Forms.DataGrid.HitTestType.ColumnResize):
       return "Resize";
          
    case(System.Windows.Forms.DataGrid.HitTestType.ParentRows):
       return "ParentRows";
          
    case(System.Windows.Forms.DataGrid.HitTestType.RowHeader):
       return "RowHeader";
          
    case(System.Windows.Forms.DataGrid.HitTestType.RowResize):
       return "RowResize";
          
    case(System.Windows.Forms.DataGrid.HitTestType.None):
       return "None";
    default:return "Unknown";
    }
 }

private:
   void dataGrid1_MouseDown( Object^ /*sender*/,
      System::Windows::Forms::MouseEventArgs^ e )
   {
      String^ newLine = "\n";
      Console::WriteLine( newLine );
      System::Windows::Forms::DataGrid::HitTestInfo^ myHitTest;
      // Use the DataGrid control's HitTest method with the x and y properties.
      myHitTest = dataGrid1->HitTest( e->X, e->Y );
      Console::WriteLine( myHitTest );
      Console::WriteLine( "Column {0}", myHitTest->Column );
      Console::WriteLine( "Row {0}", myHitTest->Row );
      Console::WriteLine( "Type {0}", myHitTest->Type );
      Console::WriteLine( "ToString {0}", myHitTest );
      Console::WriteLine( "Hit {0}", ReturnHitTest( myHitTest->Type ) );
   }

   String^ ReturnHitTest(
      System::Windows::Forms::DataGrid::HitTestType hit )
   {
      // Use this function to return the part of the grid clicked.   
      switch ( hit )
      {
      case(System::Windows::Forms::DataGrid::HitTestType::Cell):
         return "Cell";
       
      case(System::Windows::Forms::DataGrid::HitTestType::Caption):
         return "Caption";
       
      case(System::Windows::Forms::DataGrid::HitTestType::ColumnHeader):
          return "ColumnHeader";
          
      case(System::Windows::Forms::DataGrid::HitTestType::ColumnResize):
         return "Resize";
          
      case(System::Windows::Forms::DataGrid::HitTestType::ParentRows):
         return "ParentRows";
          
      case(System::Windows::Forms::DataGrid::HitTestType::RowHeader):
         return "RowHeader";
          
      case(System::Windows::Forms::DataGrid::HitTestType::RowResize):
         return "RowResize";
          
      case(System::Windows::Forms::DataGrid::HitTestType::None):
         return "None";

      default:
         return "Unknown";
      }
   }

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

.NET Compact Framework

受以下版本支持：2.0、1.0

请参见

参考

System.Windows.Forms 命名空间
DataGrid.HitTestInfo 类
HitTest