DataGridTableStyle.AllowSortingChanged 事件

在 AllowSorting 属性值更改时发生。

**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 AllowSortingChanged As EventHandler
用法
Dim instance As DataGridTableStyle
Dim handler As EventHandler

AddHandler instance.AllowSortingChanged, handler

public event EventHandler AllowSortingChanged

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

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

/** @event */
public void remove_AllowSortingChanged (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

下面的代码示例允许通过单击按钮切换 DataGrid 上的排序可用性，并在标签中显示当前排序状态。该示例要求有 DataGrid（带有包含一些数据的 System.Data.DataSet），以及 Form 上的一个 Button 和一个 Label。

Private Sub DataGridTableStyle_Sample_Load(ByVal sender As Object, _
                        ByVal e As EventArgs) Handles MyBase.Load
   myDataGridTableStyle1 = New DataGridTableStyle()

   mylabel.Text = "Sorting Status :" + myDataGridTableStyle1.AllowSorting.ToString()
   If myDataGridTableStyle1.AllowSorting = True Then
      btnApplyStyles.Text = "Remove Sorting"
   Else
      btnApplyStyles.Text = "Apply Sorting"
   End If
   ' Attach custom event handlers.
   AddHandler myDataGridTableStyle1.AllowSortingChanged, AddressOf AllowSortingChanged_Handler
   myDataGridTableStyle1.MappingName = "Customers"
End Sub 'DataGridTableStyle_Sample_Load

Private Sub AllowSortingChanged_Handler(ByVal sender As Object, ByVal e As EventArgs)
   mylabel.Text = "Sorting Status :" + myDataGridTableStyle1.AllowSorting.ToString()
End Sub 'AllowSortingChanged_Handler

Private Sub btnApplyStyles_Click(ByVal sender As Object, _
                                 ByVal e As EventArgs) Handles btnApplyStyles.Click
   If myDataGridTableStyle1.AllowSorting = True Then
      ' Remove sorting.
      myDataGridTableStyle1.AllowSorting = False
      btnApplyStyles.Text = "Allow Sorting"
   Else
      ' Allow sorting.
      myDataGridTableStyle1.AllowSorting = True
      btnApplyStyles.Text = "Remove Sorting"
   End If

   mylabel.Text = "Sorting Status :" + myDataGridTableStyle1.AllowSorting.ToString
   ' Add the DataGridTableStyle to DataGrid.
   myDataGrid.TableStyles.Add(myDataGridTableStyle1)
End Sub 'btnApplyStyles_Click

private void DataGridTableStyle_Sample_Load(object sender,
                                       EventArgs e)
{
   myDataGridTableStyle1 = new DataGridTableStyle();

   mylabel.Text = "Sorting Status :" + 
         myDataGridTableStyle1.AllowSorting.ToString();
   if(myDataGridTableStyle1.AllowSorting == true)
   {
      btnApplyStyles.Text = "Remove Sorting";
   }
   else
   {
      btnApplyStyles.Text = "Apply Sorting";
   }
   // Attach custom event handlers.
   myDataGridTableStyle1.AllowSortingChanged += 
               new System.EventHandler(AllowSortingChanged_Handler);
   myDataGridTableStyle1.MappingName = "Customers";
} 
private void AllowSortingChanged_Handler(object sender,EventArgs e)
{         
   mylabel.Text = "Sorting Status :" 
         + myDataGridTableStyle1.AllowSorting.ToString();
}     
private void btnApplyStyles_Click(object sender, EventArgs e)
{       

   if(myDataGridTableStyle1.AllowSorting == true)
   {            
      // Remove sorting.
      myDataGridTableStyle1.AllowSorting = false; 
      btnApplyStyles.Text = "Allow Sorting";
   }
   else
   {
      // Allow sorting.
      myDataGridTableStyle1.AllowSorting = true;
      btnApplyStyles.Text = "Remove Sorting";
   } 

   mylabel.Text = "Sorting Status :" + myDataGridTableStyle1.AllowSorting;
   // Add the DataGridTableStyle to DataGrid.
   myDataGrid.TableStyles.Add(myDataGridTableStyle1);
}

private:
   void DataGridTableStyle_Sample_Load( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      myDataGridTableStyle1 = gcnew DataGridTableStyle;
      mylabel->Text = String::Concat( "Sorting Status : ", myDataGridTableStyle1->AllowSorting );
      if ( myDataGridTableStyle1->AllowSorting == true )
      {
         btnApplyStyles->Text = "Remove Sorting";
      }
      else
      {
         btnApplyStyles->Text = "Apply Sorting";
      }

      myDataGridTableStyle1->AllowSortingChanged += gcnew System::EventHandler(
         this, &DataGridTableStyle_Sample::AllowSortingChanged_Handler );
      myDataGridTableStyle1->MappingName = "Customers";
   }

   void AllowSortingChanged_Handler( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      mylabel->Text = String::Concat( "Sorting Status : ", myDataGridTableStyle1->AllowSorting );
   }

   void btnApplyStyles_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      if ( myDataGridTableStyle1->AllowSorting == true )
      {
         // Remove sorting.
         myDataGridTableStyle1->AllowSorting = false;
         btnApplyStyles->Text = "Allow Sorting";
      }
      else
      {
         // Allow sorting.
         myDataGridTableStyle1->AllowSorting = true;
         btnApplyStyles->Text = "Remove Sorting";
      }

      mylabel->Text = String::Concat( "Sorting Status : ", myDataGridTableStyle1->AllowSorting );

      // Add the DataGridTableStyle to DataGrid.
      myDataGrid->TableStyles->Add( myDataGridTableStyle1 );
   }

private void DataGridTableStyleSampleLoad(Object sender, EventArgs e)
{
    myDataGridTableStyle1 = new DataGridTableStyle();
    mylabel.set_Text("Sorting Status :" 
        + System.Convert.ToString(myDataGridTableStyle1.get_AllowSorting()));
    if (myDataGridTableStyle1.get_AllowSorting() == true) {
        btnApplyStyles.set_Text("Remove Sorting");
    }
    else {
        btnApplyStyles.set_Text("Apply Sorting");
    }

    // Attach custom event handlers.
    myDataGridTableStyle1.add_AllowSortingChanged(
        new System.EventHandler(AllowSortingChanged_Handler));
    myDataGridTableStyle1.set_MappingName("Customers");
} //DataGridTableStyleSampleLoad

private void AllowSortingChanged_Handler(Object sender, EventArgs e)
{
    mylabel.set_Text("Sorting Status :" 
        + System.Convert.ToString(myDataGridTableStyle1.get_AllowSorting()));
} //AllowSortingChanged_Handler

private void btnApplyStyles_Click(Object sender, EventArgs e)
{
    if (myDataGridTableStyle1.get_AllowSorting() == true) {
        // Remove sorting.
        myDataGridTableStyle1.set_AllowSorting(false);
        btnApplyStyles.set_Text("Allow Sorting");
    }
    else {
        // Allow sorting.
        myDataGridTableStyle1.set_AllowSorting(true);
        btnApplyStyles.set_Text("Remove Sorting");
    }
    mylabel.set_Text("Sorting Status :" 
        + ((myDataGridTableStyle1.get_AllowSorting()) ? "True" : "False"));
    // Add the DataGridTableStyle to DataGrid.
    myDataGrid.get_TableStyles().Add(myDataGridTableStyle1);
} //btnApplyStyles_Click

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

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