Question

I have the following:

using (var dsProperties = GetDataset(SP_GET_APPLES, arrParams))
            {
                var apples= dsProperties.Tables[0].AsEnumerable()
                    .Select(r => new Apple()
                                     {
                                         Color = r[0].ToString(),
                                         Year = r[1].ToString(),
                                         Brand= r[2].ToString()
                                     });

                return apples.ToList();
            }

Now, I would like to have an extension method on Dataset to which I can pass the needed Type as a parameter and get the intended List back… something like

dsProperties.GetList(Apple); 

which can also be used for

using (var dsProperties = GetDataset(SP_GET_ORANGES, arrParams)){     
dsProperties.GetList(Orange); }

Is there a way to accomplish this?

Answer 1

How about this?

static IEnumerable<T> GetList<T>(this DataSet dataSet, Func<DataRow, T> mapper) {
   return dataSet
      .Tables[0]
      .AsEnumerable()
      .Select(mapper);
}

And usage:

dsProperties.GetList<Apple>(r => 
   new Apple {
      Color = r[0].ToString(),
      Year = r[1].ToString(),
      Brand= r[2].ToString()
});

This mapping can well be put in another place as well.