summaryrefslogtreecommitdiff
path: root/src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs
diff options
context:
space:
mode:
Diffstat (limited to 'src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs')
-rw-r--r--src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs228
1 files changed, 228 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs b/src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs
new file mode 100644
index 0000000..3cdc907
--- /dev/null
+++ b/src/mscorlib/shared/System/ComponentModel/DefaultValueAttribute.cs
@@ -0,0 +1,228 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Globalization;
+using System.Runtime.InteropServices;
+
+namespace System.ComponentModel
+{
+ /// <devdoc>
+ /// <para>Specifies the default value for a property.</para>
+ /// </devdoc>
+ [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1019:DefineAccessorsForAttributeArguments")]
+ [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes")]
+ [AttributeUsage(AttributeTargets.All)]
+ public class DefaultValueAttribute : Attribute
+ {
+ /// <devdoc>
+ /// This is the default value.
+ /// </devdoc>
+ private object _value;
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class, converting the
+ /// specified value to the
+ /// specified type, and using the U.S. English culture as the
+ /// translation
+ /// context.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(Type type, string value)
+ {
+ // The try/catch here is because attributes should never throw exceptions. We would fail to
+ // load an otherwise normal class.
+ try
+ {
+ if (type.IsSubclassOf(typeof(Enum)))
+ {
+ _value = Enum.Parse(type, value, true);
+ }
+ else if (type == typeof(TimeSpan))
+ {
+ _value = TimeSpan.Parse(value);
+ }
+ else
+ {
+ _value = Convert.ChangeType(value, type, CultureInfo.InvariantCulture);
+ }
+ }
+ catch
+ {
+ }
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a Unicode
+ /// character.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(char value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using an 8-bit unsigned
+ /// integer.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(byte value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a 16-bit signed
+ /// integer.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(short value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a 32-bit signed
+ /// integer.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(int value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a 64-bit signed
+ /// integer.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(long value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a
+ /// single-precision floating point
+ /// number.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(float value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a
+ /// double-precision floating point
+ /// number.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(double value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.Boolean'/>
+ /// value.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(bool value)
+ {
+ _value = value;
+ }
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.String'/>.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(string value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/>
+ /// class.</para>
+ /// </devdoc>
+ public DefaultValueAttribute(object value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.SByte'/>
+ /// value.</para>
+ /// </devdoc>
+ [CLSCompliant(false)]
+ public DefaultValueAttribute(sbyte value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.UInt16'/>
+ /// value.</para>
+ /// </devdoc>
+ [CLSCompliant(false)]
+ public DefaultValueAttribute(ushort value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.UInt32'/>
+ /// value.</para>
+ /// </devdoc>
+ [CLSCompliant(false)]
+ public DefaultValueAttribute(uint value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>Initializes a new instance of the <see cref='System.ComponentModel.DefaultValueAttribute'/> class using a <see cref='System.UInt64'/>
+ /// value.</para>
+ /// </devdoc>
+ [CLSCompliant(false)]
+ public DefaultValueAttribute(ulong value)
+ {
+ _value = value;
+ }
+
+ /// <devdoc>
+ /// <para>
+ /// Gets the default value of the property this
+ /// attribute is
+ /// bound to.
+ /// </para>
+ /// </devdoc>
+ public virtual object Value
+ {
+ get
+ {
+ return _value;
+ }
+ }
+
+ public override bool Equals(object obj)
+ {
+ if (obj == this)
+ {
+ return true;
+ }
+
+ DefaultValueAttribute other = obj as DefaultValueAttribute;
+
+ if (other != null)
+ {
+ if (Value != null)
+ {
+ return Value.Equals(other.Value);
+ }
+ else
+ {
+ return (other.Value == null);
+ }
+ }
+ return false;
+ }
+
+ public override int GetHashCode()
+ {
+ return base.GetHashCode();
+ }
+
+ protected void SetValue(object value)
+ {
+ _value = value;
+ }
+ }
+}