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ADO.NET question

Posted on 2002-03-15
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Last Modified: 2010-05-02
where in the code below should i refer my connection object to the command object?


Dim strConnect As String
        Dim cn As New SqlClient.SqlConnection()

        strConnect = "SERVER=skaleem;UID=sa;PWD=;DATABASE=BillSuppression"
        cn.ConnectionString = strConnect

        Try
            cn.Open()
            Dim cmd As New System.Data.SqlClient.SqlCommand()

            With cmd
                .CommandText() = "spbillSupp_Select_BillHdr_RecordCount"
                .CommandType() = CommandType.StoredProcedure
            End With

           
            Dim dr As SqlClient.SqlDataReader
            dr = cmd.ExecuteReader
            While dr.Read()
                System.Diagnostics.Debug.Write(dr("au_lname"))
            End While
        Catch err As Exception
            MsgBox(err.ToString)
        Finally
            If cn.State = ConnectionState.Open Then cn.Close()
        End Try

Moreover, Is there any good resource where i can get detailed vb code re ADO.NET
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Question by:smkkaleem
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6 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 6869473
>>where in the code below should i refer my connection object to the command object?


you are already doing it:
cmd.Connection = cn

>>Moreover, Is there any good resource where i can get detailed vb code re ADO.NET

haev you checked http://www.gotdotnet.com
 
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LVL 2

Author Comment

by:smkkaleem
ID: 6869512
>>you are already doing it:
cmd.Connection = cn
 where am i refering it?

secondly, how can i obtain output parameter from this command object, is the code similar to ADO
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LVL 70

Accepted Solution

by:
Éric Moreau earned 50 total points
ID: 6870064
see what I have copied from the help:

Public Sub CreateMySqlCommand(myConnection As SqlConnection, _
mySelectQuery As String, myParamArray() As SqlParameter)
    Dim myCommand As New SqlCommand(mySelectQuery, myConnection)
    myCommand.CommandText = "SELECT CustomerID, CompanyName FROM Customers WHERE Country = @Country AND City = @City"
    myCommand.UpdatedRowSource = UpdateRowSource.Both
    myCommand.Parameters.Add(myParamArray)
    Dim j As Integer
    For j = 0 To myCommand.Parameters.Count - 1
       myCommand.Parameters.Add(myParamArray(j))
    Next j
    Dim myMessage As String = ""
    Dim i As Integer
    For i = 0 To myCommand.Parameters.Count - 1
        myMessage += myCommand.Parameters(i).ToString() & ControlChars.Cr
    Next i
    Console.WriteLine(myMessage)
End Sub
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by:Moondancer
ID: 6957102
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LVL 70

Expert Comment

by:Éric Moreau
ID: 6957983
i deserve these points!
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Expert Comment

by:Moondancer
ID: 6958393
Thank you for returning and finalizing this. :)
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