DecimalConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / DecimalConverter.cs / 1 / DecimalConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 */ 
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;
 
    /// 
    /// Provides a type converter to convert 
    /// objects to and from various
    /// other representations. 
    /// 
    [HostProtection(SharedState = true)] 
    public class DecimalConverter : BaseNumberConverter { 

 
        /// 
        /// Determines whether this editor will attempt to convert hex (0x or #) strings
        /// 
        internal override bool AllowHex { 
                get {
                     return false; 
                } 
        }
 
         /// 
        /// The Type this converter is targeting (e.g. Int16, UInt32, etc.)
        /// 
        internal override Type TargetType { 
                get {
                    return typeof(Decimal); 
                } 
        }
 
        /// 
        ///    Gets a value indicating whether this converter can
        ///       convert an object to the given destination type using the context.
        ///  
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
            if (destinationType == typeof(InstanceDescriptor)) { 
                return true; 
            }
            return base.CanConvertTo(context, destinationType); 
        }

        /// 
        ///      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.
        ///  
        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);
        }
 
        /// 
        /// Convert the given value to a string using the given radix 
        ///  
        internal override object FromString(string value, int radix) {
                return Convert.ToDecimal(value, CultureInfo.CurrentCulture); 
        }

        /// 
        /// Convert the given value to a string using the given formatInfo 
        /// 
        internal override object FromString(string value, NumberFormatInfo formatInfo) { 
                return Decimal.Parse(value, NumberStyles.Float, formatInfo); 
        }
 

        /// 
        /// Convert the given value to a string using the given CultureInfo
        ///  
        internal override object FromString(string value, CultureInfo culture){
                 return Decimal.Parse(value, culture); 
        } 

        ///  
        /// Convert the given value from a string using the given formatInfo
        /// 
        internal override string ToString(object value, NumberFormatInfo formatInfo) {
                return ((Decimal)value).ToString("G", formatInfo); 
        }
    } 
}

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