121 lines
3.7 KiB
C#
121 lines
3.7 KiB
C#
//
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// System.ComponentModel.BaseNumberConverter.cs
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//
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// Authors:
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// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
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//
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// (C) 2002/2003 Ximian, Inc (http://www.ximian.com)
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// (C) 2003 Andreas Nahr
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Globalization;
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namespace System.ComponentModel
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{
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public abstract class BaseNumberConverter : TypeConverter
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{
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internal Type InnerType;
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protected BaseNumberConverter()
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{
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}
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internal abstract bool SupportHex {
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get;
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}
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
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{
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return sourceType == typeof (string) || base.CanConvertFrom (context, sourceType);
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}
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public override bool CanConvertTo(ITypeDescriptorContext context, Type t)
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{
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return t.IsPrimitive || base.CanConvertTo (context, t);
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}
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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if (culture == null)
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culture = CultureInfo.CurrentCulture;
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string text = value as string;
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if (text != null) {
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try {
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if (SupportHex) {
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if (text.Length >= 1 && text[0] == '#') {
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return ConvertFromString (text.Substring (1), 16);
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}
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if (text.StartsWith ("0x") || text.StartsWith ("0X")) {
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return ConvertFromString (text, 16);
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}
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}
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NumberFormatInfo numberFormatInfo = (NumberFormatInfo) culture.GetFormat(typeof(NumberFormatInfo));
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return ConvertFromString (text, numberFormatInfo);
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} catch (Exception e) {
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// LAMESPEC MS wraps the actual exception in an Exception
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throw new Exception (value.ToString() + " is not a valid "
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+ "value for " + InnerType.Name + ".", e);
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}
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}
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return base.ConvertFrom (context, culture, value);
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}
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture,
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object value, Type destinationType)
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{
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if (value == null)
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throw new ArgumentNullException ("value");
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if (culture == null)
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culture = CultureInfo.CurrentCulture;
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if (destinationType == typeof (string) && value is IConvertible)
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return ((IConvertible) value).ToType (destinationType, culture);
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if (destinationType.IsPrimitive)
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return Convert.ChangeType (value, destinationType, culture);
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return base.ConvertTo (context, culture, value, destinationType);
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}
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internal abstract string ConvertToString (object value, NumberFormatInfo format);
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internal abstract object ConvertFromString (string value, NumberFormatInfo format);
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internal virtual object ConvertFromString (string value, int fromBase)
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{
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if (SupportHex) {
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throw new NotImplementedException ();
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} else {
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throw new InvalidOperationException ();
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}
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}
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}
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}
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