class/System/System.ComponentModel/DecimalConverter.cs

   1 //
   2 // System.ComponentModel.DecimalConverter
   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 using System.Reflection;
  35 using System.ComponentModel.Design.Serialization;
  36
  37 namespace System.ComponentModel
  38 {
  39         public class DecimalConverter : BaseNumberConverter
  40         {
  41                 public DecimalConverter()
  42                 {
  43                         InnerType = typeof(Decimal);
  44                 }
  45
  46                 internal override bool SupportHex {
  47                         get { return false; }
  48                 }
  49
  50                 public override bool CanConvertTo (ITypeDescriptorContext context,
  51                         Type destinationType)
  52                 {
  53                         if (destinationType == typeof (InstanceDescriptor))
  54                                 return true;
  55                         return base.CanConvertTo (context, destinationType);
  56                 }
  57
  58                 public override object ConvertTo (ITypeDescriptorContext context,
  59                         CultureInfo culture, object value, Type destinationType)
  60                 {
  61                         if (destinationType == typeof (InstanceDescriptor) && value is Decimal) {
  62                                 Decimal cval = (Decimal) value;
  63                                 ConstructorInfo ctor = typeof(Decimal).GetConstructor (new Type[] {typeof(int[])});
  64                                 return new InstanceDescriptor (ctor, new object[] {Decimal.GetBits (cval)});
  65                         }
  66
  67                         return base.ConvertTo(context, culture, value, destinationType);
  68                 }
  69
  70                 internal override string ConvertToString (object value, NumberFormatInfo format)
  71                 {
  72                         return ((decimal) value).ToString ("G", format);
  73                 }
  74
  75                 internal override object ConvertFromString (string value, NumberFormatInfo format)
  76                 {
  77                         return decimal.Parse (value, NumberStyles.Float, format);
  78                 }
  79         }
  80 }