JimH44 JimH44 - 18 days ago 5
C# Question

C# shortcut for #if ... #else ... #endif like #define something as string

In C# dotNET for Mono, is there an easier way of doing this?

#if __MonoCS__
public static SqliteConnection NewConnection
#else
public static SQLiteConnection NewConnection
#endif


In C I would be able to #if and then #define something, #else and define it as something else.

I know that the C# preprocessor doesn't allow what I want, but is there a simpler way of coping with the differences between SQLite for Windows and Linux?

Thanks,

Jim




Thanks to those who answered.

Files that depend on SQLite now contain statements like this at the beginning:

#if __MonoCS__
using Mono.Data.Sqlite;
using SQLiteCommand = Mono.Data.Sqlite.SqliteCommand;
using SQLiteConnection = Mono.Data.Sqlite.SqliteConnection;
using SQLiteException = Mono.Data.Sqlite.SqliteException;
using SQLiteParameter = Mono.Data.Sqlite.SqliteParameter;
using SQLiteTransaction = Mono.Data.Sqlite.SqliteTransaction;
#else
using System.Data.SQLite;
#endif


In C I would put all that in a .h file and #include it where needed. Is there a way to do that in a Mono C# project? Nothing I tried worked.

Thanks again,

Jim

Answer

Well, you can use a using alias directive:

#if __MonoCS__
using SQLiteConnection = Foo.Bar.SqliteConnection;
#endif

Then you can use SQLiteConnection everywhere within the same file.

You may want to use the adapter pattern to put this just in a single piece of code though, so all the rest of your code can be the same either way.

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