Update grid from a query - sql

Question

I have a Visual Basic 2010 application that uses a DataGridView to display a list of frequencies from a Microsoft Access 2010 database. The application uses the BindingNavigationPostionItem to allow navigation though the table.
The Move Next and Move Previous buttons move you up and down the list. The cool thing is, as you do this, I have code that sends the Frequency and Mode to my Yeasu radio and the radio then is set to that freq/mode.
This works great but, if I try to filter the DataGridView by the Service field, the ID field becomes blank and navigation does not work.
Here is the code that runs after you select what you want to filter by and you click the filter button:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cmbox1 As String
cmbox1 = ComboBox1.Text
MyConn = New OleDbConnection
MyConn.ConnectionString = connString
ds = New DataSet
tables = ds.Tables
da = New OleDbDataAdapter("Select * from HFUtil where service = '" & cmbox1 & "'", MyConn) '
da.Fill(ds, "HFUtil")
Dim view As New DataView(tables(0))
source1.DataSource = view
DataGridView1.DataSource = view
BindingNavigator1.BindingSource = source1
DataGridView1.Refresh()
BindingNavigator1.Refresh()
'=========================================================
ListBox1.Items.Clear()
ListBox1.Text = ""
For Each dr As DataRow In ds.Tables(0).Rows
Dim sItemTemp As String
sItemTemp = String.Format("{0} {1} {2}", dr("freq"), dr("mode"), dr("desc"))
ListBox1.Items.Add(sItemTemp)
Next
ComboBox2.Items.Clear()
ComboBox2.Text = ""
For Each dr As DataRow In ds.Tables(0).Rows
Dim sItemTemp As String
sItemTemp = String.Format("{0} {1} {2}", dr("freq"), dr("mode"), dr("desc"))
ComboBox2.Items.Add(sItemTemp)
Next
End Sub
The only difference between this code and the code that runs on form load is - where clause in the data adapter.
What am I doing wrong?

Answer 1

I don't see in your code where you apply your filter. So, lets pretend for a second that you load your whole table into DataSet. Then next thing, you either use DataSet.DefaultView or create your custom DataView and assign this to DataSource property - you did this.
Now, all you have to do is apply row filter to the data view you use
view.RowFilter = "service = '" & cmbox1 & "'"
At this point you should only see subset of records and nothing should happen to your Id field. Because your data doesn't change.
I have suspicion, you changing your view somewhere and this is why you have problems.