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//
// System.ComponentModel.DateTimeConverter
//
// Authors:
// Martin Willemoes Hansen (mwh@sysrq.dk)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// (C) 2003 Martin Willemoes Hansen
// (C) 2003 Andreas Nahr
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;
namespace System.ComponentModel
{
public class DateTimeConverter : TypeConverter
{
public DateTimeConverter()
{
}
public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
return true;
return base.CanConvertFrom (context, sourceType);
}
public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof (InstanceDescriptor))
return true;
return base.CanConvertTo (context, destinationType);
}
public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string) {
string DateString = (string) value;
try {
if (DateString != null && DateString.Trim ().Length == 0) {
return DateTime.MinValue;
} else if (culture == null) {
return DateTime.Parse (DateString);
} else {
DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
return DateTime.Parse (DateString, info);
}
} catch {
throw new FormatException (DateString + " is not a valid DateTime value.");
}
}
return base.ConvertFrom (context, culture, value);
}
public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value,
Type destinationType)
{
if (value is DateTime) {
DateTime datetime = (DateTime) value;
if (destinationType == typeof (string)) {
if (culture == null)
culture = CultureInfo.CurrentCulture;
if (datetime == DateTime.MinValue)
return string.Empty;
DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
if (culture == CultureInfo.InvariantCulture) {
if (datetime.Equals (datetime.Date)) {
return datetime.ToString ("yyyy-MM-dd", culture);
}
return datetime.ToString (culture);
} else {
if (datetime == datetime.Date) {
return datetime.ToString (info.ShortDatePattern, culture);
} else {
return datetime.ToString (info.ShortDatePattern + " " +
info.ShortTimePattern, culture);
}
}
} else if (destinationType == typeof (InstanceDescriptor)) {
ConstructorInfo ctor = typeof(DateTime).GetConstructor (new Type[] {typeof(long)});
return new InstanceDescriptor (ctor, new object[] { datetime.Ticks });
}
}
return base.ConvertTo (context, culture, value, destinationType);
}
}
}
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