BindingManagerBase.Current BindingManagerBase.Current BindingManagerBase.Current BindingManagerBase.Current Property

定義

派生クラスでオーバーライドされると、現在のオブジェクトを取得します。When overridden in a derived class, gets the current object.

public:
 abstract property System::Object ^ Current { System::Object ^ get(); };
public abstract object Current { get; }
member this.Current : obj
Public MustOverride ReadOnly Property Current As Object

プロパティ値

現在のオブジェクトを表す ObjectAn Object that represents the current object.

次のコード例の値を表示する、Currentオブジェクト、BindingManagerBaseで、CurrentChangedイベント。The following code example prints the value of the Current object in a BindingManagerBase in the CurrentChanged event. 例では、データ ソースが前提としています、DataTableを含む、DataColumnという名前のCustNameします。The example assumes the data source is a DataTable containing a DataColumn named CustName.

void Current_Changed( Object^ sender, EventArgs^ /*e*/ )
{
   BindingManagerBase^ bm = dynamic_cast<BindingManagerBase^>(sender);
   
   /* Check the type of the Current object. If it is not a 
           DataRowView, exit the method. */
   if ( bm->Current->GetType() != DataRowView::typeid )
         return;

   // Otherwise, print the value of the column named "CustName".
   DataRowView^ drv = dynamic_cast<DataRowView^>(bm->Current);
   Console::Write( "CurrentChanged): " );
   Console::Write( drv[ "CustName" ] );
   Console::WriteLine();
}
private void Current_Changed(object sender, EventArgs e)
{
    BindingManagerBase bm = (BindingManagerBase) sender;
    /* Check the type of the Current object. If it is not a 
    DataRowView, exit the method. */
    if(bm.Current.GetType() != typeof(DataRowView)) return;

    // Otherwise, print the value of the column named "CustName".
    DataRowView drv = (DataRowView) bm.Current;
    Console.Write("CurrentChanged): ");
    Console.Write(drv["CustName"]);
    Console.WriteLine();
}
Private Sub Current_Changed(sender As Object, e As EventArgs)
    Dim bm As BindingManagerBase = CType(sender, BindingManagerBase)
    ' Check the type of the Current object. If it is not a
    ' DataRowView, exit the method. 
    If bm.Current.GetType() IsNot GetType(DataRowView) Then
        Return
    End If 
    ' Otherwise, print the value of the column named "CustName".
    Dim drv As DataRowView = CType(bm.Current, DataRowView)
    Console.Write("CurrentChanged): ")
    Console.Write(drv("CustName"))
    Console.WriteLine()
End Sub 'Current_Changed

注釈

Currentオブジェクトには、データ ソースの現在の項目の値が含まれています。The Current object contains the value of the current item in the data source. 現在の項目の値を使用する項目をキャストする必要があります、Typeに含まれるオブジェクトのDataSourceします。To use the value of the current item, you must cast the item to the Type of the object contained by the DataSource. たとえば、DataTableが含まれていますDataRowViewオブジェクト。For example, a DataTable contains DataRowView objects. 現在のオブジェクトの種類を調べるには、GetTypeToStringメソッド。To determine the type of the current object, use the GetType and ToString methods.

注意

ときに、DataSourceは、 DataSetDataViewManager、またはDataTable、実際にバインドする、 DataViewWhen the DataSource is a DataSet, DataViewManager, or DataTable, you are actually binding to a DataView. その結果、各Currentオブジェクトが、DataRowViewオブジェクト。Consequently, each Current object is a DataRowView object.

適用対象

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