C#•2y ago

❔ How to correctly write this linq query?

I have following code:

private string FormatLocalDateLong(LocalDate localDate)
    => localDate
          .ToString( "dd.MM.yyyy", _ruCulture );

private string FormatLocalDateLong(LocalDate localDate)
    => localDate
          .ToString( "dd.MM.yyyy", _ruCulture );

I decided to extand function and did this:

private string FormatLocalDateLong( LocalDate localDate )
   => localDate
        .ToString( "dd.MM.yyyy", _ruCulture )
        .FormatResolvedValues();

public static string FormatResolvedValues( this string localDate )
        => localDate.EndsWith( "9999" )
            ? "/"
            : localDate;

private string FormatLocalDateLong( LocalDate localDate )
   => localDate
        .ToString( "dd.MM.yyyy", _ruCulture )
        .FormatResolvedValues();

public static string FormatResolvedValues( this string localDate )
        => localDate.EndsWith( "9999" )
            ? "/"
            : localDate;

All I want is to write the same without extansion FormatResolvedValues Smth like that but I don't understand how to write it correctly:

private string FormatLocalDateLong( LocalDate localDate )
   => localDate
        .ToString( "dd.MM.yyyy", _ruCulture )
        .EndsWith("9999")
             ? "/"
             : ... (I don't want to write .ToString() again);

private string FormatLocalDateLong( LocalDate localDate )
   => localDate
        .ToString( "dd.MM.yyyy", _ruCulture )
        .EndsWith("9999")
             ? "/"
             : ... (I don't want to write .ToString() again);

6 Replies

SWEETPONY•2y ago

ah.. I don't know why.. but FormatLoclDateLong returns "/" or null ..

Tvde1•2y ago

private string FormatLocalDateLong( LocalDate localDate )
{
    var stringDate = localDate.ToString( "dd.MM.yyyy", _ruCulture );
    return stringDate.EndsWith("9999")
         ? "/"
         : stringDate;
}

private string FormatLocalDateLong( LocalDate localDate )
{
    var stringDate = localDate.ToString( "dd.MM.yyyy", _ruCulture );
    return stringDate.EndsWith("9999")
         ? "/"
         : stringDate;
}

🙂 or

private string FormatLocalDateLong( LocalDate localDate )
{
    return localDate.Year == 9999
        ? "/"
        : localDate.ToString( "dd.MM.yyyy", _ruCulture );
}

private string FormatLocalDateLong( LocalDate localDate )
{
    return localDate.Year == 9999
        ? "/"
        : localDate.ToString( "dd.MM.yyyy", _ruCulture );
}

SWEETPONY•2y ago

I hadn't thought of that! thanks but any way I don't understand why my extension method returns null. it's strange

Tvde1•2y ago

that's weird indeed

SWEETPONY•2y ago

ok my bad thanks for your idea

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How to correctly write this linq query?