// official doc
// introduced all converting method of c#
// https://docs.microsoft.com/zh-cn/dotnet/standard/base-types/type-conversion
// convert table
//https://docs.microsoft.com/zh-cn/dotnet/standard/base-types/conversion-tables
public static void Play()
{
//NOTE kind of raw way of convert
object a = Convert.ChangeType("123", typeof(int));
//NOTE TypeConverter more raw convert
var vodkaConverter = TypeDescriptor.GetConverter(typeof(Vodka));
var toString = vodkaConverter.CanConvertTo(typeof(string));
var fromString = vodkaConverter.CanConvertFrom(typeof(string));
Console.WriteLine(vodkaConverter.IsValid(5));
Console.WriteLine(toString);
Console.WriteLine(fromString);
Console.WriteLine(vodkaConverter.ConvertFrom("yuyi"));
Console.WriteLine(vodkaConverter.ConvertFrom(99));
var vodka = new Vodka()
{
Degree = 70, Brand = "life", Type = "drink"
};
Console.WriteLine(vodka);
Console.WriteLine(vodkaConverter.ConvertToString(vodka));
foreach (Color c in TypeDescriptor.GetConverter(typeof(Color)).GetStandardValues())
{
Console.WriteLine(TypeDescriptor.GetConverter(c).ConvertToString(c));
}
var d = Convert.ChangeType(vodka, typeof(string));
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string vs)
{
var v = new Vodka();
v.Brand = vs;
return(v);
}
if (value is int vi)
{
var v = new Vodka();
v.Degree = vi;
return(v);
}
return(base.ConvertFrom(context, culture, value));
}