public void ConvertTo()
{
MarginsConverter mc = new MarginsConverter();
Guid guid = Guid.NewGuid();
CultureInfo culture = CultureInfo.InvariantCulture;
Margins margins = new Margins()
{
Left = 1, Right = 2, Top = 3, Bottom = 4
};
// try once with then once without context
for (var context = new MyTypeDescriptorContext(); context != null; context = null)
{
Assert.Equal("1;2;3;4", mc.ConvertTo(context, culture, "1;2;3;4", typeof(string)));
object converted = mc.ConvertTo(context, culture, margins, typeof(string));
Assert.IsType <string>(converted);
Assert.Equal(',', culture.TextInfo.ListSeparator[0]);
Assert.Equal("1, 2, 3, 4", converted);
converted = mc.ConvertTo(context, culture, margins, typeof(InstanceDescriptor));
Assert.IsType <InstanceDescriptor>(converted);
Assert.Equal(new object[] { 1, 2, 3, 4 }, ((InstanceDescriptor)converted).Arguments);
Assert.Throws <NotSupportedException>(() => mc.ConvertTo(context, culture, new object(), typeof(object)));
Assert.Throws <NotSupportedException>(() => mc.ConvertTo(context, culture, 12, typeof(int)));
Assert.Throws <NotSupportedException>(() => mc.ConvertTo(context, culture, guid, typeof(Guid)));
Assert.Equal(string.Empty, (string)mc.ConvertTo(null, typeof(string)));
Assert.Equal(string.Empty, (string)mc.ConvertTo(context, CultureInfo.CreateSpecificCulture("ru-RU"), null, typeof(string)));
}
}
/// <summary>
/// Extends ConvertTo so that methods that return a specific type object given a Type parameter can be
/// used as generic method and casting is not required.
/// <example>
/// marginsconverter.ConvertTo<int>(context, culture, value);
/// </example>
/// </summary>
public static T ConvertTo <T>(this MarginsConverter marginsconverter, System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, Object value)
{
if (marginsconverter == null)
{
throw new ArgumentNullException("marginsconverter");
}
return((T)marginsconverter.ConvertTo(context, culture, value, typeof(T)));
}
/// <summary>
/// Extends ConvertTo so that methods that return a specific type object given a Type parameter can be
/// used as generic method and casting is not required.
/// <example>
/// typeconverter.ConvertTo<int>(value);
/// </example>
/// </summary>
public static T ConvertTo <T>(this MarginsConverter typeconverter, Object value)
{
if (typeconverter == null)
{
throw new ArgumentNullException("typeconverter");
}
return((T)typeconverter.ConvertTo(value, typeof(T)));
}