将对象转换为具有指定区域性的字符串

Question

有没有更好的方法将 Object 类型的变量转换为具有指定文化的字符串（这与 Thread 的默认文化不同），而不是使用诸如 1) 尝试将对象强制转换为所有类型的丑陋方法支持ToString(CultureInfo)重载或 2) 临时设置线程的默认文化？

Answer 1

You only have to cast it to the IConvertible interface:

object o = ...;
string s = ((IConvertible)o).ToString(cultureInfo);

Answer 2

I think the best way is to use Convert.ToString(obj, cultureInfo). It makes all the casting under the hood.

public static string ToString(Object value, IFormatProvider provider) {
    IConvertible ic = value as IConvertible;
    if (ic != null) 
        return ic.ToString(provider);
    IFormattable formattable = value as IFormattable;
    if (formattable != null) 
        return formattable.ToString(null, provider);
    return value == null? String.Empty: value.ToString();
}

Source: https://referencesource.microsoft.com/#mscorlib/system/convert.cs,6a1a2c3ac58e60dd

Answer 3

string.Format(culture, "{0}", obj);