help! insert into mdb database using datatable

hi,

i'm having a problem with this set of codes.
i'm trying to insert data into datatable and update it into a database but everytime i click the save button

an OledbException will occur

VB Code:

Private myConnect As OleDbConnection
    Private myDataadapter As OleDbDataAdapter
    Private myDataTable As DataTable
    Private cmbInsert As OleDbCommand    
 
    Private Sub FormItemType_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim dbConnect As String = "Provider=Microsoft.JET.OLEDB.4.0;data source=D:\prodType.mdb"
 
        myConnect = New OleDbConnection(dbConnect)
        Dim mySqlQuery As String = "Select *from ProductTypeInfo"
        myDataTable = New DataTable
        myDataadapter = New OleDbDataAdapter(mySqlQuery, dbConnect)
        cmbInsert = New OleDbCommand
        cmbInsert.CommandText = "Insert into ProductTypeInfo (ProductTypeID, ProductTypeName) values (@ProductTypeID, @ProductTypeName)"
        cmbInsert.Connection = myConnect
        cmbInsert.Parameters.Add(New OleDbParameter("@ProductTypeID", OleDbType.BSTR))
        cmbInsert.Parameters.Add(New OleDbParameter("@ProductTypeName", OleDbType.BSTR))
        myDataadapter.InsertCommand = cmbInsert
 
        myConnect.Open()
        myDataadapter.Fill(myDataTable)
        myConnect.Close()
        DataGrid1.DataSource = myDataTable
 
    End Sub
 
    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        myConnect.Open()
        myDataadapter.Update(myDataTable)
 
        myConnect.Close()
    End Sub

You should always provide the error message when posting code that throws an exception, otherwise we're guessing to a degree. I'm guessing the issue is the types you've chosen for your parameters. What sort of data do your columns contain? BSTR is an odd choice for most data. If your columns contain text then you should probably be using VarChar as the type. If ProductTypeID contains numbers then the type for that parameter should be Integer.

ok. thank you

So... does that mean that the problem is solved? If so you then you should mark your thread as resolved from the Thread Tools menu. If not then feedback's a good idea, like "I'll try that and get back to you". Otherwise people might just unsubscribe from your thread and thus be less likely to help you if you add another post.