3 // Permission is hereby granted, free of charge, to any person obtaining
4 // a copy of this software and associated documentation files (the
5 // "Software"), to deal in the Software without restriction, including
6 // without limitation the rights to use, copy, modify, merge, publish,
7 // distribute, sublicense, and/or sell copies of the Software, and to
8 // permit persons to whom the Software is furnished to do so, subject to
9 // the following conditions:
11 // The above copyright notice and this permission notice shall be
12 // included in all copies or substantial portions of the Software.
14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 * Namespace: System.Web.UI.WebControls
\r
24 * Class: UnitConverter
\r
26 * Author: Gaurav Vaish
\r
27 * Maintainer: gvaish@iitk.ac.in
\r
28 * Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>
\r
29 * Implementation: yes
\r
32 * (C) Gaurav Vaish (2002)
\r
36 using System.Globalization;
\r
37 using System.ComponentModel;
\r
39 using System.Web.UI;
\r
40 using System.ComponentModel.Design.Serialization;
\r
41 using System.Reflection;
\r
43 namespace System.Web.UI.WebControls
\r
45 public class UnitConverter : TypeConverter
\r
47 public UnitConverter(): base()
\r
51 public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
\r
53 if(sourceType == typeof(string))
\r
55 return base.CanConvertFrom(context, sourceType);
\r
59 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
\r
61 if (destinationType == typeof (string))
\r
64 if (destinationType == typeof (InstanceDescriptor))
\r
67 return base.CanConvertTo (context, destinationType);
\r
71 public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
\r
77 string val = ((string)value).Trim();
\r
82 return (culture == null ? Unit.Parse(val) : Unit.Parse(val, culture));
\r
84 return base.ConvertFrom(context, culture, value);
\r
87 public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
\r
89 if(destinationType == typeof(string))
\r
91 Unit val = (Unit)value;
\r
92 if(val == Unit.Empty)
\r
94 return String.Empty;
\r
96 return val.ToString(culture);
\r
100 if (destinationType == typeof (InstanceDescriptor) && value is Unit) {
\r
101 Unit s = (Unit) value;
102 ConstructorInfo ci = typeof(Unit).GetConstructor (new Type[] { typeof(double), typeof(UnitType) });
\r
103 return new InstanceDescriptor (ci, new object[] { s.Value, s.Type });
\r
106 if (destinationType == typeof (InstanceDescriptor) && value is string) {
\r
107 Unit s = Unit.Parse ((string)value, CultureInfo.InvariantCulture);
108 ConstructorInfo ci = typeof(Unit).GetConstructor (new Type[] { typeof(double), typeof(UnitType) });
\r
109 return new InstanceDescriptor (ci, new object[] { s.Value, s.Type });
\r
113 return base.ConvertTo(context, culture, value, destinationType);
\r