ConvertEventArgs.DesiredType Property
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Gets the data type of the desired value.
public:
property Type ^ DesiredType { Type ^ get(); };
public Type DesiredType { get; }
public Type? DesiredType { get; }
member this.DesiredType : Type
Public ReadOnly Property DesiredType As Type
The Type of the desired value.
The following code example uses the DesiredType property to determine whether the conversion of one type to another can proceed. The DecimalToCurrencyString
method tests whether the DesiredType is a string. If not, the code exits the method. Similarly, the CurrencyStringToDecimal
method tests whether the DesiredType is a Decimal, and exits if it is not 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
The DesiredType property enables you to check the type of the property that the value is being converted to.
Termék | Verziók |
---|---|
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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