Question

I want to put in an array some columns of a table in sql server.

for example

att1 att2 att3  att4 att5
-------------------------
1   2   3   4   5
5   6   7   8   9   
10  11  12  13  14

I want to have it into an array only the first 3 columns

like

[1,2,3,5,6,7,10,11,12]

so i am skipping columns att4 and att5

Answer 1

var dataList = new List<object>();

while (reader.Read()) 
{
    var values = new object[reader.FieldCount];
    var fieldCount = reader.GetValues(values);

    dataList.AddRange(values);
}

//var arrayData = dataList.ToArray()
var arrayData = dataList.ConvertAll<double>(o => (double) o).ToArray();