| public IsValid ( ITypeDescriptorContext context, object value ) : bool | ||
| context | ITypeDescriptorContext | |
| value | object | |
| return | bool | |
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context. </param>
/// <param name="value">The <see cref="T:System.Object" /> to test for validity. </param>
public override bool IsValid(ITypeDescriptorContext context, object value)
{
if (underlyingTypeConverter != null)
{
return(underlyingTypeConverter.IsValid(context, value));
}
return(base.IsValid(context, value));
}
/// <summary>
/// <para>Gets a value indicating whether the given value object is valid for this type.</para>
/// </summary>
public override bool IsValid(ITypeDescriptorContext context, object value)
{
if (_simpleTypeConverter != null)
{
object unwrappedValue = value;
if (unwrappedValue == null)
{
return(true); // null is valid for nullable.
}
else
{
return(_simpleTypeConverter.IsValid(context, unwrappedValue));
}
}
return(base.IsValid(context, value));
}
/// <summary>
/// Returns whether the given value object is valid for this type and for the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="value">The <see cref="T:System.Object"></see> to test for validity.</param>
/// <returns>
/// <c>true</c> if the specified value is valid for this object; otherwise, <c>false</c>.
/// </returns>
public override bool IsValid(System.ComponentModel.ITypeDescriptorContext context, object value)
{
if (value != null && value.GetType() == typeof(string))
{
// provo a convertirlo
try
{
object val = ConvertFrom(context, CultureInfo.CurrentCulture, value);
return(true);
}
catch (FormatException)
{
return(false);
}
catch (ArgumentException)
{
return(false);
}
}
else
{
return(baseTypeConverter.IsValid(context, value));
}
}
public static bool Is <TValue>(this string value)
{
System.ComponentModel.TypeConverter converter = System.ComponentModel.TypeDescriptor.GetConverter(typeof(TValue));
return(((converter != null) && converter.CanConvertFrom(typeof(string))) && converter.IsValid(value));
}