VB.net SQLparameter Listbox

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Hello,
Was hoping I could get some help with this code. I'm trying to fill the table with the data found in two Listboxs. But I'm an getting an error: SQLException was unhandled. The variable name '@TrackTitle' has already been declared. Variable names must be unique within a query batch or stored procedure. Is there anyway to make this work? I've tried all sorts of different configurations but no luck.

VB

objConnection.Open()

           .CommandText = "INSERT INTO Tracks " & _
                    "(TrackTitle, TrackSeqNum) " & _
                    "VALUES(@TrackTitle, @TrackSeqNum )"

           For i = 0 To ListBox3.Items.Count - 1
               .Parameters.AddWithValue("@TrackTitle", ListBox3.Items(i))
               .Parameters.AddWithValue("@TrackSeqNum", ListBox1.Items(i))

               .ExecuteNonQuery()
           Next
           
           objConnection.Close()

Posted 20-Apr-11 6:13am

Thraxman

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Maciej Los · Answer 1 · 2011-04-20T07:01:00

Solution 1

1) Only for the first time (i=0) you can add parameter! For the next loop you must change it!
or...
2) Build query in run-time in this way:

VB

sSQL = "INSERT INTO Tracks (TrackTitle, TrackSeqNum) " & vbCrLf & _
"VALUES( '" & ListBox3.Items(i) & "', '" & ListBox1.Items(i)"')"

Then you need to create command object with CommandText = sSQL and call ExecuteNonQuery.

Posted 20-Apr-11 7:01am

Maciej Los

Comments

Thraxman 20-Apr-11 15:30pm

losmac, That seemed to do the trick! There's a few quirks when SQL runs across a file that has some funky punctuation in it, but at least i see stuff going into the database! Big Plus! Now I've got something to work with! Thanks!!!!!!!!!

Dim sSQL As String
For i = 0 To ListBox3.Items.Count - 1
sSQL = "INSERT INTO Tracks (TrackTitle, TrackSeqNum) " & vbCrLf & _
"VALUES( '" & (ListBox3.Items(i)) & "', '" & (ListBox1.Items(i)) & "')"
.CommandText = sSQL
objConnection.Open()
.ExecuteNonQuery()
objConnection.Close()
Next

Costica U · Answer 2 · 2011-04-20T14:42:00

You can use parameterized query like this. Note that parameter are added before for loop and have the value updated in the loop.

VB

objConnection.Open()
           .CommandText = "INSERT INTO Tracks " & _
                    "(TrackTitle, TrackSeqNum) " & _
                    "VALUES(@TrackTitle, @TrackSeqNum )"

           .Parameters.AddWithValue("@TrackTitle", "")
           .Parameters.AddWithValue("@TrackSeqNum", "")
           For i = 0 To ListBox3.Items.Count - 1
               .Parameters("@TrackTitle").Value = ListBox3.Items(i)
               .Parameters("@TrackSeqNum").Value = ListBox1.Items(i)
               .ExecuteNonQuery()
           Next
           objConnection.Close()