BindingManagerBase.EndCurrentEdit メソッド

派生クラスでオーバーライドされると、現在の編集を終了します。

Public MustOverride Sub EndCurrentEdit()
[C#]
public abstract void EndCurrentEdit();
[C++]
public: virtual void EndCurrentEdit() = 0;
[JScript]
public abstract function EndCurrentEdit();

解説

このメソッドは、データ ソースが IEditableObject インターフェイスを実装している場合にだけサポートされます。この場合、変更内容は保存されます。オブジェクトが IEditableObject インターフェイスを実装していない場合は、データへの変更は保存されません。

使用例

[Visual Basic, C#, C++] CancelCurrentEdit メソッドと EndCurrentEdit メソッドの例を次に示します。 CancelCurrentEdit メソッドを呼び出すと、データに加えた変更は破棄されます。 EndCurrentEdit メソッドを呼び出すと、変更は保持されます。

 
Private Sub CancelEdit()
    ' Gets the CurrencyManager which is returned when the 
    ' data source is a DataView.
    Dim myMgr As BindingManagerBase = _
    CType(BindingContext(myDataView), CurrencyManager)

    ' Gets the current row and changes a value. Then cancels the 
    ' edit and thereby discards the changes.
    Dim tempRowView As DataRowView = _
    CType(myMgr.Current, DataRowView)
    Console.WriteLine("Original: {0}", tempRowView("myCol"))
    tempRowView("myCol") = "These changes will be discarded"
    Console.WriteLine("Edit: {0}", tempRowView("myCol"))
    myMgr.CancelCurrentEdit()
    Console.WriteLine("After CanceCurrentlEdit: {0}", _
    tempRowView("myCol"))
End Sub

Private Sub EndEdit()
    ' Gets the CurrencyManager which is returned when the 
    ' data source is a DataView.
    Dim myMgr As BindingManagerBase = _
    CType(BindingContext(myDataView), CurrencyManager)

    ' Gets the current row and changes a value. Then ends the 
    ' edit and thereby keeps the changes.
    Dim tempRowView As DataRowView = _
    CType(myMgr.Current, DataRowView)
    Console.WriteLine("Original: {0}", tempRowView("myCol"))
    tempRowView("myCol") = "These changes will be kept"
    Console.WriteLine("Edit: {0}", tempRowView("myCol"))
    myMgr.EndCurrentEdit()
    Console.WriteLine("After EndCurrentEdit: {0}", _
    tempRowView("myCol"))
End Sub

[C#] 
private void CancelEdit()
{
    // Gets the CurrencyManager which is returned when the 
    // data source is a DataView.
    BindingManagerBase myMgr = 
        (CurrencyManager) BindingContext[myDataView]; 

    // Gets the current row and changes a value. Then cancels the 
    // edit and thereby discards the changes.
    DataRowView tempRowView = (DataRowView) myMgr.Current;
    Console.WriteLine("Original: {0}", tempRowView["myCol"]);
    tempRowView["myCol"] = "These changes will be discarded";
    Console.WriteLine("Edit: {0}", tempRowView["myCol"]);
    myMgr.CancelCurrentEdit();
    Console.WriteLine("After CanceCurrentlEdit: {0}", 
        tempRowView["myCol"]);
}

private void EndEdit()
{
    // Gets the CurrencyManager which is returned when the 
    // data source is a DataView.
    BindingManagerBase myMgr = 
        (CurrencyManager) BindingContext[myDataView];

    // Gets the current row and changes a value. Then ends the 
    // edit and thereby keeps the changes.
    DataRowView tempRowView = (DataRowView) myMgr.Current;
    Console.WriteLine("Original: {0}", tempRowView["myCol"]);
    tempRowView["myCol"] = "These changes will be kept";
    Console.WriteLine("Edit: {0}", tempRowView["myCol"]);
    myMgr.EndCurrentEdit();
    Console.WriteLine("After EndCurrentEdit: {0}", 
        tempRowView["myCol"]);
}


[C++] 
private:
    void CancelEdit() {
        // Gets the CurrencyManager which is returned when the
        // data source is a DataView.
        BindingManagerBase* myMgr =
            dynamic_cast<CurrencyManager*>(BindingContext->Item[myDataView]);

        // Gets the current row and changes a value. Then cancels the
        // edit and thereby discards the changes.
        DataRowView* tempRowView = dynamic_cast<DataRowView*>(myMgr->Current);
        Console::WriteLine(S"Original: {0}", tempRowView->Item[S"myCol"]);
        tempRowView->Item[S"myCol"] = S"These changes will be discarded";
        Console::WriteLine(S"Edit: {0}", tempRowView->Item[S"myCol"]);
        myMgr->CancelCurrentEdit();
        Console::WriteLine(S"After CanceCurrentlEdit: {0}",
            tempRowView->Item[S"myCol"]);
    }

    void EndEdit() {
        // Gets the CurrencyManager which is returned when the
        // data source is a DataView.
        BindingManagerBase* myMgr =
            dynamic_cast<CurrencyManager*>(BindingContext->Item[myDataView]);

        // Gets the current row and changes a value. Then ends the
        // edit and thereby keeps the changes.
        DataRowView* tempRowView = dynamic_cast<DataRowView*>(myMgr->Current);
        Console::WriteLine(S"Original: {0}", tempRowView->Item[S"myCol"]);
        tempRowView->Item[S"myCol"] = S"These changes will be kept";
        Console::WriteLine(S"Edit: {0}", tempRowView->Item[S"myCol"]);
        myMgr->EndCurrentEdit();
        Console::WriteLine(S"After EndCurrentEdit: {0}",
            tempRowView->Item[S"myCol"]);
    }

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必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET

参照

BindingManagerBase クラス | BindingManagerBase メンバ | System.Windows.Forms 名前空間 | CancelCurrentEdit