Question

I’m trying to insert values from my asp.net application into my MySQL database.

On the register page people can fill in Name and Pass and press submit.

Public Function InsertMember(ByVal objMember As Member) As Boolean

    myconn.Open()

    Dim cmd As New OdbcCommand("INSERT INTO member(Name, Pass) VALUES (@Name,@Pass)", myconn)

    cmd.CommandType = CommandType.Text
    cmd.Parameters.Add("Name", OdbcType.VarChar).Value = objMember.Name
    cmd.Parameters.Add("Pass", OdbcType.VarChar).Value = objMember.Pass

    cmd.ExecuteNonQuery()

    cmd.Dispose()
    cmd = Nothing

    myconn.Close()
    myconn.Dispose()

    Return True

End Function

But all this does is add NULL values into my database.

Any clues on what I’m doing wrong?

Answer 1

How about switching convention to use ? and parameter names matching the column names?
Perhaps consider switching to AddWithValue() if you can.

From the MSDN OdbcParameterCollection.Add Method

Dim insertSQL As String = "INSERT INTO member(Name, Pass) VALUES (?,?)"
Dim cmd As New OdbcCommand(insertSQL, myconn)
'cmd.Parameters.Add("Name", OdbcType.VarChar).Value = objMember.Name '

cmd.Parameters.AddWithValue("Name", objMember.Name)           
cmd.Parameters.AddWithValue("Pass", objMember.Pass) 

'Note that with ODBC Command, the ORDER you add to the parameters collection
'matters most. The names of your params don't matter. 

I suspect the ? placeholders will be filled with the values in order as they’re added to the Parameters collection (from another question/answer).