mcs/class/System/System.ComponentModel/CultureInfoConverter.cs

   1 //
   2 // System.ComponentModel.CultureInfoConverter
   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 CultureInfoConverter : TypeConverter
  38         {
  39
  40                 public CultureInfoConverter()
  41                 {
  42                 }
  43
  44                 public override bool CanConvertFrom (ITypeDescriptorContext context,
  45                         Type sourceType)
  46                 {
  47                         if (sourceType == typeof (string))
  48                                 return true;
  49                         return base.CanConvertFrom (context, sourceType);
  50                 }
  51
  52                 public override bool CanConvertTo (ITypeDescriptorContext context,
  53                         Type destinationType)
  54                 {
  55                         if (destinationType == typeof (string))
  56                                 return true;
  57                         return base.CanConvertTo (context, destinationType);
  58                 }
  59
  60                 public override object ConvertFrom (ITypeDescriptorContext context,
  61                         CultureInfo culture, object value)
  62                 {
  63                         if (value.GetType() == typeof (string)) {
  64                                 string CultureString = (String) value;
  65                                 try {
  66                                         // try to create a new CultureInfo if form is RFC 1766
  67                                         return new CultureInfo (CultureString);
  68                                 } catch {
  69                                         // try to create a new CultureInfo if form is verbose name
  70                                         foreach (CultureInfo CI in CultureInfo.GetCultures (CultureTypes.AllCultures))
  71                                         // LAMESPEC MS seems to use EnglishName (culture invariant) - check this
  72                                                 if (CI.EnglishName.ToString().IndexOf (CultureString) > 0)
  73                                                         return CI;
  74                                 }
  75                                 throw new ArgumentException ("Culture incorrect or not available in this environment.", "value");
  76                         }
  77                         return base.ConvertFrom (context, culture, value);
  78                 }
  79
  80                 public override object ConvertTo (ITypeDescriptorContext context,
  81                                                   CultureInfo culture, object value, Type destinationType)
  82                 {
  83                         if (destinationType == typeof (string) && value != null && (value is CultureInfo))
  84                                 // LAMESPEC MS seems to use EnglishName (culture invariant) - check this
  85                                 return ((CultureInfo) value).EnglishName;
  86                         return base.ConvertTo (context, culture, value, destinationType);
  87                 }
  88
  89                 public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
  90                 {
  91                         return new StandardValuesCollection (CultureInfo.GetCultures (CultureTypes.AllCultures));
  92                 }
  93
  94                 public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
  95                 {
  96                         return false;
  97                 }
  98
  99                 public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
 100                 {
 101                         return true;
 102                 }
 103
 104         }
 105 }