ConvertEventArgs.DesiredType Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

ConvertEventArgs.cs

Mendapatkan jenis data dari nilai yang diinginkan.

public:
 property Type ^ DesiredType { Type ^ get(); };

public Type? DesiredType { get; }

member this.DesiredType : Type

Public ReadOnly Property DesiredType As Type

Nilai Properti

Type

Nilai Type yang diinginkan.

Contoh

Contoh kode berikut menggunakan DesiredType properti untuk menentukan apakah konversi satu jenis ke jenis lainnya dapat dilanjutkan. Metode menguji DecimalToCurrencyString apakah DesiredType itu string. Jika tidak, kode keluar dari metode . Demikian pula, metode menguji CurrencyStringToDecimal apakah DesiredType adalah Decimal, dan keluar jika bukan true.

private:
   void DecimalToCurrencyString( Object^ /*sender*/, ConvertEventArgs^ cevent )
   {
      // The method converts only to string type. 
      if ( cevent->DesiredType != String::typeid )
      {
         return;
      }

      cevent->Value = ( (Decimal^)(cevent->Value) )->ToString( "c" );
   }

   void CurrencyStringToDecimal( Object^ /*sender*/, ConvertEventArgs^ cevent )
   {
      // The method converts only to decimal type.
      if ( cevent->DesiredType != Decimal::typeid )
      {
         return;
      }

      cevent->Value = Decimal::Parse( cevent->Value->ToString(),
         NumberStyles::Currency, nullptr );
   }

private void DecimalToCurrencyString(object sender, ConvertEventArgs cevent)
{
   // The method converts only to string type. 
   if(cevent.DesiredType != typeof(string)) return;

   cevent.Value = ((decimal) cevent.Value).ToString("c");
}

private void CurrencyStringToDecimal(object sender, ConvertEventArgs cevent)
{   
   // The method converts only to decimal type.
   if(cevent.DesiredType != typeof(decimal)) return;

   cevent.Value = Decimal.Parse(cevent.Value.ToString(),
   NumberStyles.Currency, null);
}

Private Sub DecimalToCurrencyString(sender As Object, cevent As ConvertEventArgs)
   ' The method converts only to string type. 
   If cevent.DesiredType IsNot GetType(String) Then
      Return
   End If 
   cevent.Value = CDec(cevent.Value).ToString("c")
End Sub 
 
 
Private Sub CurrencyStringToDecimal(sender As Object, cevent As ConvertEventArgs)
   ' The method converts only to decimal type.
   If cevent.DesiredType IsNot GetType(Decimal) Then
      Return
   End If 
 cevent.Value = Decimal.Parse(cevent.Value.ToString, _
 NumberStyles.Currency, nothing)
End Sub

Keterangan

Properti DesiredType memungkinkan Anda memeriksa jenis properti tempat nilai dikonversi.