136 lines
3.2 KiB
C#
136 lines
3.2 KiB
C#
//
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// System.ComponentModel.DefaultValueAttribute.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) 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.Globalization;
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namespace System.ComponentModel
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{
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[AttributeUsage(AttributeTargets.All)]
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public class DefaultValueAttribute : Attribute
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{
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private object DefaultValue;
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public DefaultValueAttribute (bool value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (byte value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (char value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (double value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (short value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (int value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (long value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (object value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (float value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (string value)
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{
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DefaultValue = value;
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}
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public DefaultValueAttribute (Type type, string value)
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{
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try {
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#if NET_2_1
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if (type.IsEnum)
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DefaultValue = Enum.Parse (type, value);
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else if (type == typeof (TimeSpan))
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DefaultValue = TimeSpan.Parse (value);
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else
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DefaultValue = Convert.ChangeType (value, type, null);
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#else
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TypeConverter converter = TypeDescriptor.GetConverter (type);
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DefaultValue = converter.ConvertFromString (null, CultureInfo.InvariantCulture, value);
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#endif
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} catch { }
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}
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public virtual object Value {
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get { return DefaultValue; }
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}
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protected void SetValue (object value)
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{
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DefaultValue = value;
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}
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public override bool Equals (object obj)
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{
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DefaultValueAttribute dva = (obj as DefaultValueAttribute);
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if (dva == null)
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return false;
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if (DefaultValue == null)
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return (dva.Value == null);
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return DefaultValue.Equals (dva.Value);
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}
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public override int GetHashCode()
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{
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if (DefaultValue == null)
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return 0;
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return DefaultValue.GetHashCode();
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}
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}
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}
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