working with data in DataSet

fyeojo · August 24th, 2003, 01:22 PM

my dataset contains data from a bridge table. it has these rows:

eveID .............. spkName
1 ...................... Bob
1 ...................... Harry
1 ...................... Jim
2 ...................... Bob
2 ...................... Tim
3 ...................... Bruce
3 ...................... George

i want to rearrange the data so that the result will be:

eveID .............. spkName
1 ...................... Bob, Harry, Jim
2 ...................... Bob, Tim
3 ...................... Bruce, George

in classic asp, i would do:

Dim arrID(), strID, i
strID = ""
i = 0

rs.MoveFirst
Do While Not rs.EOF
If rs(0) <> strID Then
strID = rs(0)
Redim Preserve arrID(1,i)
arrID(1,i) = rs(0)
i=i+1
End If
arrID(0,i) = arrID(0,i) & ", " & rs(1)
rs.MoveNext
Loop

how is this done in asp.NET?

i am extremely frustrated. in classic asp it is so easy. dotNET is supposed to be easier, yet it is so much more difficult to work with the data. is there no functionality built in to these objects that will ease the process?

planoie · August 25th, 2003, 01:15 PM

Where exactly are you having problems with what you are doing? You'll need to use different objects and make a few syntax changes, but your logic should not need to change. Firstly there is no recordset object any more, you'll need a datareader to go thru the records. Here's what I came up with. I just plugged your code into VS.Net and changed the syntax where needed until I didn't get any design-time errors, I didn't actually execute it.

Code:

Dim arrID(1, -1) As String
Dim strID As Int64
Dim i As Integer = 0
Dim objDR As SqlClient.SqlDataReader
While objDR.Read
    If objDR.GetInt64(0) <> strID Then
        strID = objDR.GetInt64(0)
        ReDim Preserve arrID(1, i)
        arrID(1, i) = objDR.GetInt64(0).ToString
        i += 1
    End If
    arrID(0, i) = arrID(0, i) & ", " & objDR.GetString(1)
End While

Hopefully that will get you off to the right start. If you are using a data provider other than MSSQL than you'll need to adjust accordingly.

Peter

fyeojo · August 26th, 2003, 01:17 AM

thx for responding. i have just fixed it.

gonna take a while to get used to the oop platform.