mcs/class/System/System.ComponentModel/TimeSpanConverter.cs

   1 //
   2 // System.ComponentModel.TimeSpanConverter
   3 //
   4 // Authors:
   5 //  Martin Willemoes Hansen (mwh@sysrq.dk)
   6 //  Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) 2003 Martin Willemoes Hansen
   9 // (C) 2003 Andreas Nahr
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Globalization;
  34
  35 namespace System.ComponentModel
  36 {
  37         public class TimeSpanConverter : TypeConverter
  38         {
  39
  40                 public TimeSpanConverter()
  41                 {
  42                 }
  43
  44                 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
  45                 {
  46                         if (sourceType == typeof (string))
  47                                 return true;
  48                         return base.CanConvertFrom (context, sourceType);
  49                 }
  50
  51                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  52                 {
  53                         if (destinationType == typeof (string))
  54                                 return true;
  55                         return base.CanConvertTo (context, destinationType);
  56                 }
  57
  58                 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
  59                 {
  60                         if (value.GetType() == typeof (string)) {
  61                                 string TimeSpanString = (string) value;
  62                                 try {
  63                                         // LAMESPEC Doc says TimeSpan uses Ticks, but MS uses time format:
  64                                         // [ws][-][d.]hh:mm:ss[.ff][ws]
  65                                         return TimeSpan.Parse (TimeSpanString);
  66                                 } catch {
  67                                         throw new FormatException (TimeSpanString + "is not valid for a TimeSpan.");
  68                                 }
  69                         }
  70                         return base.ConvertFrom (context, culture, value);
  71                 }
  72
  73                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value,
  74                                                   Type destinationType)
  75                 {
  76                         if (destinationType == typeof (string) && value != null && value.GetType() == typeof (TimeSpan)) {
  77                                 // LAMESPEC Doc says TimeSpan uses Ticks, but MS uses time format
  78                                 // [ws][-][d.]hh:mm:ss[.ff][ws]
  79                                 return ((TimeSpan) value).ToString();
  80                         }
  81                         return base.ConvertTo (context, culture, value, destinationType);
  82                 }
  83         }
  84 }