How do I loop through rows with a data reader in C#?

Question

I know I can use while(dr.Read()){...} but that loops every field on my table, I want to retrieve all the values from the first row, and then second... and so o

Answer 1

How do I loop through rows with a data reader in C#?

IDataReader.Read() advances the reader to the next row in the resultset.

while(reader.Read()){
    /* do whatever you'd like to do for each row. */
}

So, for each iteration of your loop, you'd do another loop, 0 to reader.FieldCount, and call reader.GetValue(i) for each field.

The bigger question is what kind of structure do you want to use to hold that data?