CurrencyManager.Count Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

CurrencyManager.cs

Mendapatkan jumlah item dalam daftar.

public:
 virtual property int Count { int get(); };

public override int Count { get; }

member this.Count : int

Public Overrides ReadOnly Property Count As Integer

Nilai Properti

Int32

Jumlah item dalam daftar.

Contoh

Contoh kode berikut berulang melalui daftar hingga item akhir, yang ditentukan oleh Count properti, tercapai.

void PrintListItems()
{
   
   // Get the CurrencyManager of a TextBox control.
   CurrencyManager^ myCurrencyManager = dynamic_cast<CurrencyManager^>(textBox1->BindingContext[nullptr]);
   
   // Presuming the list is a DataView, create a DataRowView variable.
   DataRowView^ drv;
   for ( int i = 0; i < myCurrencyManager->Count; i++ )
   {
      myCurrencyManager->Position = i;
      drv = dynamic_cast<DataRowView^>(myCurrencyManager->Current);
      
      // Presuming a column named CompanyName exists.
      Console::WriteLine( drv[ "CompanyName" ] );

   }
}

    private void PrintListItems() {
    // Get the CurrencyManager of a TextBox control.
    CurrencyManager myCurrencyManager = (CurrencyManager)textBox1.BindingContext[0];
    // Presuming the list is a DataView, create a DataRowView variable.
    DataRowView drv;
    for(int i = 0; i < myCurrencyManager.Count; i++) {
        myCurrencyManager.Position = i;
        drv = (DataRowView)myCurrencyManager.Current;
        // Presuming a column named CompanyName exists.
        Console.WriteLine(drv["CompanyName"]);
    }
}

Private Sub PrintListItems()
    ' Get the CurrencyManager of a TextBox control.
    Dim myCurrencyManager As CurrencyManager = CType(textBox1.BindingContext(0), CurrencyManager)
    ' Presuming the list is a DataView, create a DataRowView variable.
    Dim drv As DataRowView
    Dim i As Integer
    For i = 0 To myCurrencyManager.Count - 1
        myCurrencyManager.Position = i
        drv = CType(myCurrencyManager.Current, DataRowView)
        ' Presuming a column named CompanyName exists.
        Console.WriteLine(drv("CompanyName"))
    Next i
End Sub

Keterangan

Gunakan properti hitungan untuk menentukan kapan akhir daftar telah tercapai. CurrencyManager Karena mempertahankan array item berbasis 0, akhir daftar selalu Count dikurangi satu.

Lihat juga

• List
• Position
• Current