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//------------------------------------------------------------------------------
// <copyright file="SizeConverter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Messaging.Design
{
using System.Messaging;
using System.ComponentModel;
using System.Diagnostics;
using System;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
using System.Collections;
using System.Globalization;
/// <include file='doc\SizeConverter.uex' path='docs/doc[@for="SizeConverter"]/*' />
internal class SizeConverter : TypeConverter
{
/// <include file='doc\SizeConverter.uex' path='docs/doc[@for="SizeConverter.SizeConverter.CanConvertFrom"]/*' />
/// <devdoc>
/// Determines if this converter can convert an object in the given source
/// type to the native type of the converter.
/// </devdoc>
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof(string))
{
return true;
}
return base.CanConvertFrom(context, sourceType);
}
/// <include file='doc\SizeConverter.uex' path='docs/doc[@for="SizeConverter.SizeConverter.ConvertFrom"]/*' />
/// <devdoc>
/// Converts the given object to the converter's native type.
/// </devdoc>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string)
{
string text = ((string)value).Trim();
if (text.Length == 0 || string.Compare(text, Res.GetString(Res.InfiniteValue), true, CultureInfo.CurrentCulture) == 0)
return (long)uint.MaxValue;
else
{
long size = Convert.ToInt64(text, culture);
return size;
}
}
return base.ConvertFrom(context, culture, value);
}
/// <include file='doc\SizeConverter.uex' path='docs/doc[@for="SizeConverter.SizeConverter.ConvertTo"]/*' />
/// <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(string))
{
if (value != null)
{
if ((long)value == uint.MaxValue)
return Res.GetString(Res.InfiniteValue);
else
return value.ToString();
}
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
}
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