public static string WrapString(this string s, TextEnclosures wrapper, NullValueOptions nullOptions)
{
if (s == null)
{
switch (nullOptions)
{
case NullValueOptions.None:
return(null);
case NullValueOptions.UseEmptyString:
return(string.Empty.WrapString(wrapper));
case NullValueOptions.UsePlaceholderValue:
return(NullPlaceholder);
default:
throw new InvalidEnumArgumentException(nameof(nullOptions), (int)nullOptions, typeof(NullValueOptions));
}
}
switch (wrapper)
{
case TextEnclosures.None:
return(s);
case TextEnclosures.CurlyBrackets:
return("{" + s + "}");
case TextEnclosures.SquareBrackets:
return("[" + s + "]");
case TextEnclosures.AngleBrackets:
return("<" + s + ">");
case TextEnclosures.Parentheses:
return("(" + s + ")");
case TextEnclosures.DoubleQuotes:
return("\"" + s + "\"");
case TextEnclosures.SingleQuotes:
return("'" + s + "'");
default:
throw new NotImplementedException($"No wrapping has been defined for {wrapper} yet.");
}
}
public static string WrapString(this string s, TextEnclosures wrapper, string nullStringValue, bool overrideNullStringWrapperType = true)
{
if (nullStringValue == null)
{
throw new ArgumentNullException(nameof(nullStringValue));
}
if (s == null)
{
if (overrideNullStringWrapperType)
{
return(nullStringValue.WrapString(wrapper));
}
return(nullStringValue.WrapString(NullableTypeWrapper));
}
return(s.WrapString(wrapper));
}
public static string WrapString(this string s, TextEnclosures wrapper)
{
return(s.WrapString(wrapper, NullValueOptions.UsePlaceholderValue));
}
private static Func <object, string> GenerateToStringFunction(this MethodInfo info, TextEnclosures wrapper = TextEnclosures.None)
{
return(((Expression <Func <object, string> >)(o => o == null ? NullPlaceholder : (info.Invoke(o, null) as string).WrapString(wrapper))).Compile());
}