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; ////// [HostProtection(SharedState = true)] public class DecimalConverter : BaseNumberConverter { ///Provides a type converter to convert ////// objects to and from various /// other representations. /// 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); } } ////// public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { return true; } return base.CanConvertTo(context, destinationType); } ///Gets a value indicating whether this converter can /// convert an object to the given destination type using the context. ////// 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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