Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/DecimalConverter.cs

@@ -0,0 +1,117 @@
+//------------------------------------------------------------------------------
+// <copyright file="DecimalConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel {
+    using Microsoft.Win32;
+    using System.ComponentModel.Design.Serialization;
+    using System.Diagnostics;
+    using System.Globalization;
+    using System.Reflection;
+    using System.Runtime.InteropServices;
+    using System.Runtime.Remoting;
+    using System.Runtime.Serialization.Formatters;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    /// <para>Provides a type converter to convert <see cref='System.Decimal'/>
+    /// objects to and from various
+    /// other representations.</para>
+    /// </devdoc>
+    [HostProtection(SharedState = true)]
+    public class DecimalConverter : BaseNumberConverter {
+    
+          
+        /// <devdoc>
+        /// Determines whether this editor will attempt to convert hex (0x or #) strings
+        /// </devdoc>
+        internal override bool AllowHex {
+                get {
+                     return false;
+                }
+        }
+    
+         /// <devdoc>
+        /// The Type this converter is targeting (e.g. Int16, UInt32, etc.)
+        /// </devdoc>
+        internal override Type TargetType {
+                get {
+                    return typeof(Decimal);
+                }
+        }
+        
+        /// <devdoc>
+        ///    <para>Gets a value indicating whether this converter can
+        ///       convert an object to the given destination type using the context.</para>
+        /// </devdoc>
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
+            if (destinationType == typeof(InstanceDescriptor)) {
+                return true;
+            }
+            return base.CanConvertTo(context, destinationType);
+        }
+        
+        /// <devdoc>
+        ///      Converts the given object to another type.  The most common types to convert
+        ///      are to and from a string object.  The default implementation will make a call
+        ///      to ToString on the object if the object is valid and if the destination
+        ///      type is string.  If this cannot convert to the desitnation type, this will
+        ///      throw a NotSupportedException.
+        /// </devdoc>
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
+            if (destinationType == null) {
+                throw new ArgumentNullException("destinationType");
+            }
+            
+            if (destinationType == typeof(InstanceDescriptor) && value is Decimal) {
+            
+                object[] args = new object[] { Decimal.GetBits((Decimal)value) };
+                MemberInfo member = typeof(Decimal).GetConstructor(new Type[] {typeof(Int32[])});
+                
+                Debug.Assert(member != null, "Could not convert decimal to member.  Did someone change method name / signature and not update DecimalConverter?");
+                if (member != null) {
+                    return new InstanceDescriptor(member, args);
+                }
+                else {
+                    return null;
+                }
+            }
+
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+
+        /// <devdoc>
+        /// Convert the given value to a string using the given radix
+        /// </devdoc>
+        internal override object FromString(string value, int radix) {
+                return Convert.ToDecimal(value, CultureInfo.CurrentCulture);
+        }
+        
+        /// <devdoc>
+        /// Convert the given value to a string using the given formatInfo
+        /// </devdoc>
+        internal override object FromString(string value, NumberFormatInfo formatInfo) {
+                return Decimal.Parse(value, NumberStyles.Float, formatInfo);
+        }
+        
+        
+        /// <devdoc>
+        /// Convert the given value to a string using the given CultureInfo
+        /// </devdoc>
+        internal override object FromString(string value, CultureInfo culture){
+                 return Decimal.Parse(value, culture);
+        }
+        
+        /// <devdoc>
+        /// Convert the given value from a string using the given formatInfo
+        /// </devdoc>
+        internal override string ToString(object value, NumberFormatInfo formatInfo) {
+                return ((Decimal)value).ToString("G", formatInfo);
+        }
+    }
+}
+