There is a code, you can test it in the local Form
DIM DT AS DATATABLE DIM DV AS DATAVIEW
Private sub button2_click (Byval E AS System.EventArgs) Handles Button2.Click DIM DRV AS DATAROWVIEW = DV (0)
Drv.delete () msgbox (dt.rows.count) End Sub
Private Sub Form1_Load (Byval E AS System.EventArgs) Handles MyBase.Load Dt = New DataTable
Dt.columns.add ("col1", gettype (string)) DT.COLUMNS.ADD ("col2", gettype (string))
DIM DR AS DATAROW for I as integer = 0 to 9 dr = dt.newrow dr (0) = i.to.Tostring () DR (1) = i.toTString () Dt.Rows.Add (DR) Next Dt.acceptchanges DV = New DataView (DT)
End Sub
You will find that when you click on the button, you will display 10 until you have left the wrong report.
Question 1. Why is MsgBox (Dt.Rows.count) always returns 10
Question 2. Simply modify a line of code, you can display the number of real records, do you know why?
The problem is actually very simple. You find the answer to the ADO.NET's data cache mechanism after answering.
