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oledbexception  must declare the scalar variable

Posted on 2007-03-29
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Last Modified: 2008-01-09
I tried the following code connecting to an access database and it worked fine,  But I tried this code on SQL server 2005 and I get this error:

Error: System.Data.OleDb.OleDbException: Must declare the scalar variable "@f1".

Connection string to Access Database:

 "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\myDB.mdb;Persist Security Info=False;Jet OLEDB:Database Password=myPassword;"

Connection string to SQL server 2005:

"Provider=sqloledb;Data Source=192.168.0.129,1433;Initial Catalog=myDB;User Id=MyUser;Password=myPassword;"


Dim sql As String = "UPDATE Table1 SET f1=@f1,f2=@f2,f3=@f3 WHERE ID = 118"
                Dim conn As New OleDb.OleDbConnection(ConnectionString)
                Dim command As New OleDb.OleDbCommand(sql, conn)

                command.Parameters.Add("@f1", OleDb.OleDbType.Variant).Value = TextBox1.Text
                command.Parameters.Add("@f2", OleDb.OleDbType.Variant).Value = TextBox2.Text
                command.Parameters.Add("@f3", OleDb.OleDbType.Variant).Value = TextBox3.Text

                Try
                    conn.Open()

                    command.ExecuteNonQuery()
                Catch ex As Exception
                    MsgBox(ex.ToString)
                Finally
                    conn.Close()
                End Try

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Question by:OFGemini
6 Comments
 
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Expert Comment

by:DarrenD
ID: 18816350
Hi,

Here is an article which may help.

http://www.dotnet247.com/247reference/msgs/29/146328.aspx

Darren
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Expert Comment

by:YZlat
ID: 18817026
change

 command.Parameters.Add("@f1", OleDb.OleDbType.Variant).Value = TextBox1.Text
                command.Parameters.Add("@f2", OleDb.OleDbType.Variant).Value = TextBox2.Text
                command.Parameters.Add("@f3", OleDb.OleDbType.Variant).Value = TextBox3.Text
to

  command.Parameters.Add(New OleDbParameter("@f1", OleDb.OleDbType.Variant)).Value = TextBox1.Text
                command.Parameters.Add(New OleDbParameter"@f2", OleDb.OleDbType.Variant)).Value = TextBox2.Text
                command.Parameters.Add(New OleDbParameter"@f3", OleDb.OleDbType.Variant)).Value = TextBox3.Text
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Author Comment

by:OFGemini
ID: 18817631
YZlat,

I tried that, and It didn't work.  I get the same error
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Author Comment

by:OFGemini
ID: 18846914
I did some research.  SQL server wants the command text to use '?'


Dim sql As String = "UPDATE Table1 SET f1=@f1,f2=@f2,f3=@f3 WHERE ID = 118"

was changed to:
Dim sql As String = "UPDATE Table1 SET f1=?,f2=?,f3=? WHERE ID = 118"

then I had to add the parameters in the order the questions marks appear in the command text.


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