Simple question

[Gary]

Hi,

I have a question is regarding OLEDbDataReader

Is there a way to access Data filled to an OLEDBDataReader using field name
instead of field position.

If not possible using OLEDbDataReader, is there any alternative to achieve
this?

TIA,

Gary

 

[Dominique Kuster]

I have a question is regarding OLEDbDataReader
Is there a way to access Data filled to an OLEDBDataReader using field name
instead of field position.

Declare variables and store the position of selected fields before you start
the read loop :
VB.NET:
Dim iFirstnamePosition As Integer = myReader.GetOrdinal("first_name")
Dim iLastnamePosition As Integer = myReader.GetOrdinal("last_name")
Do While myReader.Read()
Console.WriteLine("Full name: {0} {1}",
myReader.GetString(iFirstNamePosition),
myReader.GetString(iLastNamePosition))
Loop

C#:
int iFirstNamePosition = myReader.GetOrdinal("first_name");
int iLastNamePosition = myReader.GetOrdinal("last_name");
while (myReaderRead()) {
Console.WriteLine("Full name: {0} {1}",
myReader.GetString(iFirstNamePosition),
myReader.GetString(iLastNamePosition));
}

The xxxDataReader is supposed to be very performant, you would have a
performance decrease if you lookup a field name every time you fetch a new
row. Working with column ordinals is the fastest method.