BindingManagerBase.CurrentChanged BindingManagerBase.CurrentChanged BindingManagerBase.CurrentChanged BindingManagerBase.CurrentChanged Event

定义

在当前绑定项更改时发生。Occurs when the currently bound item changes.

public:
 event EventHandler ^ CurrentChanged;
public event EventHandler CurrentChanged;
member this.CurrentChanged : EventHandler 
Public Custom Event CurrentChanged As EventHandler 

示例

下面的代码示例在Current CurrentChanged事件的BindingManagerBase中输出对象的值。The following code example prints the value of the Current object in a BindingManagerBase in the CurrentChanged event. 该示例假设数据源是DataTable包含一个DataColumn名为CustName的。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

注解

当属性发生更改或CurrentItemChanged发生事件时, 将引发事件。CurrentChanged CurrentThe CurrentChanged event is raised whenever the Current property changes or the CurrentItemChanged event occurs.

有关处理事件的详细信息, 请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于

另请参阅