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//
// System.ComponentModel.CharConverter
//
// Author:
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
// Ivan N. Zlatev (contact@i-nz.net)
//
// (C) 2003 Andreas Nahr
// (C) 2008 Novell, Inc. (http://www.novell.com)
//
//
// 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.Globalization;
namespace System.ComponentModel
{
public class CharConverter : TypeConverter
{
public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
return true;
return base.CanConvertFrom (context, sourceType);
}
public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
{
string char_string = value as string;
if (char_string != null) {
if (char_string.Length > 1)
char_string = char_string.Trim ();
if (char_string.Length > 1)
throw new FormatException (string.Format (
"String {0} is not a valid Char: " +
"it has to be less than or equal to " +
"one char long.", char_string));
if (char_string.Length == 0)
return '\0';
return char_string [0];
}
return base.ConvertFrom (context, culture, value);
}
public override object ConvertTo (ITypeDescriptorContext context,
CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof (string)) {
if ((value != null) && (value is char)) {
char c = (char) value;
if (c == '\0')
return String.Empty;
else
return new string (c, 1);
}
}
return base.ConvertTo (context, culture, value, destinationType);
}
}
}
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