CurrencyManager.Current Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

CurrencyManager.cs

Mendapatkan item saat ini dalam daftar.

public:
 virtual property System::Object ^ Current { System::Object ^ get(); };

public override object? Current { get; }

member this.Current : obj

Public Overrides ReadOnly Property Current As Object

Nilai Properti

Object

Item daftar jenis Object.

Contoh

Contoh kode berikut menggunakan Current properti untuk mencetak ContactName bidang untuk item saat ini dalam daftar.

void GetCurrentItem()
{
   CurrencyManager^ myCurrencyManager;
   
   // Get the CurrencyManager of a TextBox control.
   myCurrencyManager = dynamic_cast<CurrencyManager^>(textBox1->BindingContext[nullptr]);
   
   // Get the current item cast as a DataRowView.
   DataRowView^ myDataRowView;
   myDataRowView = dynamic_cast<DataRowView^>(myCurrencyManager->Current);
   
   // Print the column named ContactName.
   Console::WriteLine( myDataRowView[ "ContactName" ] );
}

private void GetCurrentItem() {
    CurrencyManager myCurrencyManager;
    // Get the CurrencyManager of a TextBox control.
    myCurrencyManager = (CurrencyManager)textBox1.BindingContext[0];
    // Get the current item cast as a DataRowView.
    DataRowView myDataRowView;
    myDataRowView = (DataRowView) myCurrencyManager.Current;
    // Print the column named ContactName.
    Console.WriteLine(myDataRowView["ContactName"]);
}

Private Sub GetCurrentItem()
    Dim myCurrencyManager As CurrencyManager
    ' Get the CurrencyManager of a TextBox control.
    myCurrencyManager = CType(textBox1.BindingContext(0), CurrencyManager)
    ' Get the current item cast as a DataRowView.
    Dim myDataRowView As DataRowView
    myDataRowView = CType(myCurrencyManager.Current, DataRowView)
    ' Print the column named ContactName.
    Console.WriteLine(myDataRowView("ContactName"))
End Sub

Keterangan

Untuk mendapatkan item saat ini, Anda harus mengetahui jenis datanya untuk mentransmisiannya dengan benar. Misalnya, jika sumber data adalah DataView atau DataTable, Anda harus melemparkan item saat ini sebagai DataRowView objek.

Lihat juga

• DataRowView
• List
• Position
• Count