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using System;
using System.ComponentModel;
namespace ConfigurableConvertTest.GenericConverters
{
/// <summary>
/// Class that tries to add a converter using the TypeDescriptor.GetConverter method.
/// Usually this should be put as the last searcher because TypeDescriptor conversions are
/// slow and do boxing for value types.
/// </summary>
public static class FromTypeDescriptorConverter
{
private static readonly SearchingConverterEventHandler _searchingConverterHandler = _SearchingConverter;
/// <summary>
/// Gets the Event Handler that you can use to add TypeDescriptor converters to the
/// Converters class. Remember that TypeDescriptor converters are slow, so add this
/// as the last Searching handler if possible.
/// </summary>
public static SearchingConverterEventHandler SearchingConverterHandler
{
get
{
return _searchingConverterHandler;
}
}
private static void _SearchingConverter(SearchingConverterEventArgs args)
{
var inputType = args.InputType;
var outputType = args.OutputType;
var inputOutputConverter = TypeDescriptor.GetConverter(inputType);
var outputInputConverter = TypeDescriptor.GetConverter(outputType);
if
(
inputOutputConverter != null && inputOutputConverter.CanConvertTo(outputType) ||
outputInputConverter != null && outputInputConverter.CanConvertFrom(inputType)
)
{
var converterType = typeof(FromTypeConverter_Converter<,>).MakeGenericType(inputType, outputType);
var property = converterType.GetProperty("Instance");
var converter = property.GetValue(null, null);
args.Converter = (Delegate)converter;
}
}
}
/// <summary>
/// This type holds the generic handlers to do a type conversion from one input type to
/// an output type using a type descriptor converter (TypeConverter instance).
/// </summary>
public static class FromTypeConverter_Converter<TInput, TOutput>
{
private static readonly Converter<TInput, TOutput> _instance = _GetInstance();
/// <summary>
/// Gets the Instance to do this kind of conversion.
/// </summary>
public static Converter<TInput, TOutput> Instance
{
get
{
return _instance;
}
}
private static Converter<TInput, TOutput> _GetInstance()
{
var converter = TypeDescriptor.GetConverter(typeof(TInput));
if (converter != null && converter.CanConvertTo(typeof(TOutput)))
return (input) => (TOutput)converter.ConvertTo(input, typeof(TOutput));
converter = TypeDescriptor.GetConverter(typeof(TOutput));
if (converter != null && converter.CanConvertFrom(typeof(TInput)))
return (input) => (TOutput)converter.ConvertFrom(input);
throw new InvalidOperationException("There is no conversion from " + typeof(TInput).FullName + " to " + typeof(TOutput).FullName);
}
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).