Question

So i have this method:

    internal K GetValue<T, K>(T source, string col) where T : IBaseObject     {         string table = GetObjectTableName(source.GetType());         DataTable dt = _mbx.Tables[table];         DataRow[] rows = dt.Select('ID = ' + source.ID);         if (rows.Length == 0) return K;          return (K) rows[0][col];     } 

I want to be able to return a null, or some kind of empty value, if no rows are found. What’s the correct syntax to do this?

Answer 1

You could return default(K), and that means you will return null if K is a reference type, or 0 for int, ‘\0’ for char, and so on…

Then you can easily verify if that was returned:

if (object.Equals(resultValue, default(K))) {     //... }