Question : VSTO populating cells with datatable

Hi,

I have an excel template created in VSTO, and I have added an Action Pane with a combobox that is bound to the "Customers" table referencing the "CustomerRef" field. Now, what I want, is to have the user selet a particular customer from the drop down list, then to display the data, as seen in the query below on my spreadsheet, I have named values where I want the reulst displayed, but am at a loss on how to extract the data from the data table. Please see code below on what I have thus far. Can anyone help me in completing this to display the results on my sheet?

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Private Sub btnCreateStatement_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCreateStatement.Click

        Dim myConn As New MySqlConnection
        Dim myComm As New MySqlCommand
        Dim myDataAdapter As New MySqlDataAdapter
        Dim myData As New DataTable
        Dim CustomersDataRow As oztech_testDataSet.CustomersRow = CType(CType(Me.CustomersBindingSource.Current, DataRowView).Row(), oztech_testDataSet.CustomersRow)

        Dim strSQL As String
        Dim sEndDate As String
        Dim CustomerRef As String

        CustomerRef = CustomerRefComboBox.Text
        sEndDate = Format(DateTimePicker2.Value, "yyyy-mm-dd")

        strSQL = " SELECT tr.TransID, tr.Date, trt.Category, trt.Descr, cz.CustomerRef, tr.Amount, SUM( tr.Amount ) AS TotalGroup, tr.Notes, " & _
                   "PERIOD_DIFF(CONCAT(YEAR(" & sEndDate & "),IF(MONTH(" & sEndDate & ")<10,'0',''),MONTH(" & sEndDate & ")),CONCAT(YEAR(tr.Date),IF(MONTH(tr.Date)<10,'0',''),MONTH(tr.Date))) AS Days, " & _
                   "IFNULL( (Select SUM(AllocationAmount)FROM Transactions T1 LEFT JOIN TransactionAllocations TA ON TA.TransactionID = T1.TransID " & _
                   "LEFT JOIN Transactions T2 ON T2.TransID = TA.TransactionID_Allocation WHERE(tr.TransID = T1.TransID) AND T2.CustomerID = '14' ) * -1, 0) AS TotalAgainstCustomer, " & _
                   "IFNULL( (Select SUM(AllocationAmount)FROM Transactions T1 LEFT JOIN TransactionAllocations TA ON TA.TransactionID_Allocation = T1.TransID " & _
                   "WHERE tr.TransID = T1.TransID) * -1, 0) AS PaidAmount " & _
                   "FROM Customers cz, Transactions tr, TransTypes trt " & _
                   "WHERE (tr.CustomerID = cz.CustomerID AND cz.CustomerRef = '" & CustomerRef & "' AND tr.TransTypeID = trt.TransTypeID) " & _
                   "AND (tr.Date<=" & sEndDate & ") " & _
                   "AND NOT tr.TransTypeID IN ('RESOLVE DEBIT', 'RESOLVE CREDIT') " & _
                   "GROUP BY IFNULL( LinkTo, TransID ) " & _
                   "HAVING TotalGroup <>0 " & _
                   "ORDER BY tr.Date, tr.TransID LIMIT 0, 30"

        myConn = GetConnection()

        Try
            myConn.Open()
            Try
                myComm.Connection = myConn
                myComm.CommandText = strSQL

                myDataAdapter.SelectCommand = myComm
                myDataAdapter.Fill(myData)

            Catch myError As MySqlException
                MessageBox.Show("There was an error reading from the database: " & myError.Message)
            End Try

        Catch myError As MySqlException
            MessageBox.Show("Error connecting to the database: " & myError.Message)
        Finally
            If myConn.State <> ConnectionState.Closed Then
                myConn.Close()
            End If
        End Try

    End Sub

End Class

Answer : VSTO populating cells with datatable

tips:
1) Is SQL statement correct? try at SQL server o a small prototype winform.
2)
2) Is Oztech_testDataSet of type DataSet, valid instance and not been filled or used elsewhere in your code.
If you are using it for something else just create a new one.
3) Also delete line 49, you are doing that on the finally statement anyway.
4) You do not need line 6 ( Dim myData As New DataTable) the for each loop of line 51 will set it up for you.