DataGridBoolColumn.AllowNullChanged イベント

.NET Framework クラス ライブラリ リファレンス

DataGridBoolColumn.AllowNullChanged イベント

AllowNull プロパティが変更されると発生します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

Public Event AllowNullChanged As
 EventHandler

Visual Basic (使用法)

Dim instance As DataGridBoolColumn
Dim handler As EventHandler

AddHandler instance.AllowNullChanged, handler

C#

public event EventHandler AllowNullChanged

C++

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

J#

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

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

JScript

JScript では、イベントは使用できますが、新規に宣言することはできません。

使用例

このメンバの使用方法を次のコード例に示します。

Visual Basic

Private Sub RegisterEventHandlers(myDataGridBoolColumn
 As DataGridBoolColumn)
   AddHandler myDataGridBoolColumn.AllowNullChanged, _
                       AddressOf myDataGridBoolColumn_AllowNullChanged
   AddHandler myDataGridBoolColumn.TrueValueChanged, _
                       AddressOf myDataGridBoolColumn_TrueValueChanged
   AddHandler myDataGridBoolColumn.FalseValueChanged, _
                       AddressOf myDataGridBoolColumn_FalseValueChanged
End Sub 'RegisterEventHandlers


' Event handler for event when 'TrueValue' is property changed.
Private Sub myDataGridBoolColumn_TrueValueChanged(sender
 As Object, e As EventArgs)
   MessageBox.Show("The TrueValue property of the DataGridBoolColumn
 has been changed to " _
                                                 & myDataGridBoolColumn.TrueValue)
End Sub 'myDataGridBoolColumn_TrueValueChanged


' Event handler for event when 'FalseValue' is property changed.
Private Sub myDataGridBoolColumn_FalseValueChanged(sender
 As Object, e As EventArgs)
   MessageBox.Show("The FalseValue property of the DataGridBoolColumn
 has been changed to " _
                                                     & myDataGridBoolColumn.FalseValue)
End Sub 'myDataGridBoolColumn_FalseValueChanged


' Event handler for event when 'AllowNull' is property changed.
Private Sub myDataGridBoolColumn_AllowNullChanged(sender
 As Object, e As EventArgs)
   MessageBox.Show("The AllowNull property of DataGridBoolColumn
 has been changed to " _
                                                       & myDataGridBoolColumn.AllowNull)
End Sub 'myDataGridBoolColumn_AllowNullChanged

C#

private void RegisterEventHandlers(DataGridBoolColumn
 myDataGridBoolColumn)
{
   myDataGridBoolColumn.AllowNullChanged += 
      new System.EventHandler(myDataGridBoolColumn_AllowNullChanged);
   myDataGridBoolColumn.TrueValueChanged += 
      new System.EventHandler(myDataGridBoolColumn_TrueValueChanged);
   myDataGridBoolColumn.FalseValueChanged +=
      new System.EventHandler(myDataGridBoolColumn_FalseValueChanged);
}

// Event handler for event when 'TrueValue' is property changed.
private void myDataGridBoolColumn_TrueValueChanged(object
 sender, EventArgs e)
{
   MessageBox.Show("The TrueValue property of the DataGridBoolColumn has been
 changed to "
      + myDataGridBoolColumn.TrueValue);
}

// Event handler for event when 'FalseValue' is property changed.
private void myDataGridBoolColumn_FalseValueChanged(object
 sender, EventArgs e)
{
   MessageBox.Show("The FalseValue property of the DataGridBoolColumn has been
 changed to "
      + myDataGridBoolColumn.FalseValue);
}

// Event handler for event when 'AllowNull' is property changed.
private void myDataGridBoolColumn_AllowNullChanged(object
 sender, EventArgs e)
{
   MessageBox.Show("The AllowNull property of DataGridBoolColumn has been changed
 to "
      + myDataGridBoolColumn.AllowNull);
}

C++

void RegisterEventHandlers( DataGridBoolColumn^ myDataGridBoolColumn
 )
{
   myDataGridBoolColumn->AllowNullChanged += gcnew System::EventHandler( this,
 &MyForm::myDataGridBoolColumn_AllowNullChanged );
   myDataGridBoolColumn->TrueValueChanged += gcnew System::EventHandler( this,
 &MyForm::myDataGridBoolColumn_TrueValueChanged );
   myDataGridBoolColumn->FalseValueChanged += gcnew System::EventHandler( this,
 &MyForm::myDataGridBoolColumn_FalseValueChanged );
}

// Event handler for event when 'TrueValue' is property changed.
void myDataGridBoolColumn_TrueValueChanged( Object^ /*sender*/,
 EventArgs^ /*e*/ )
{
   MessageBox::Show( String::Concat( "The TrueValue property of the DataGridBoolColumn
 has been changed to ", myDataGridBoolColumn->TrueValue ) );
}

// Event handler for event when 'FalseValue' is property changed.
void myDataGridBoolColumn_FalseValueChanged( Object^ /*sender*/,
 EventArgs^ /*e*/ )
{
   MessageBox::Show( String::Concat( "The FalseValue property of the DataGridBoolColumn
 has been changed to ", myDataGridBoolColumn->FalseValue ) );
}

// Event handler for event when 'AllowNull' is property changed.
void myDataGridBoolColumn_AllowNullChanged( Object^ /*sender*/,
 EventArgs^ /*e*/ )
{
   MessageBox::Show( String::Concat( "The AllowNull property of DataGridBoolColumn
 has been changed to ", myDataGridBoolColumn->AllowNull ) );
}

J#

private void RegisterEventHandlers(DataGridBoolColumn
 myDataGridBoolColumn)
{
    myDataGridBoolColumn.add_AllowNullChanged(new System.
        EventHandler(myDataGridBoolColumn_AllowNullChanged));
    myDataGridBoolColumn.add_TrueValueChanged(new System.
        EventHandler(myDataGridBoolColumn_TrueValueChanged));
    myDataGridBoolColumn.add_FalseValueChanged(new System.
        EventHandler(myDataGridBoolColumn_FalseValueChanged));
} //RegisterEventHandlers

// Event handler for event when 'TrueValue' is property changed.
private void myDataGridBoolColumn_TrueValueChanged(Object
 sender, 
    EventArgs e)
{
    MessageBox.Show("The TrueValue property of the "
        + "DataGridBoolColumn has been changed to " 
        + myDataGridBoolColumn.get_TrueValue());
} //myDataGridBoolColumn_TrueValueChanged

// Event handler for event when 'FalseValue' is property changed.
private void myDataGridBoolColumn_FalseValueChanged(Object
 sender, 
    EventArgs e)
{
    MessageBox.Show("The FalseValue property of the "
        + "DataGridBoolColumn has been changed to " 
        + myDataGridBoolColumn.get_FalseValue());
} //myDataGridBoolColumn_FalseValueChanged

// Event handler for event when 'AllowNull' is property changed.
private void myDataGridBoolColumn_AllowNullChanged(Object
 sender, 
    EventArgs e)
{
    MessageBox.Show("The AllowNull property of "
        + "DataGridBoolColumn has been changed to " 
        + myDataGridBoolColumn.get_AllowNull());
} //myDataGridBoolColumn_AllowNullChanged

プラットフォーム

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
DataGridBoolColumn クラス
DataGridBoolColumn メンバ
System.Windows.Forms 名前空間