How can i add into access database from vb.net - database

Question

Am still learning VB and database but I have a little problem. My codes works but when I
try to look into the database I don't find all what are been saved, how do I rectify it? and also the edit and delete. thanks
Here is my code:
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'ItemsDataSet.Items' table. You can move, or remove it, as needed.
Me.ItemsTableAdapter.Fill(Me.ItemsDataSet.Items)
'TODO: This line of code loads data into the 'ItemsDataSet.Items' table. You can move, or remove it, as needed.
Me.ItemsTableAdapter.Fill(Me.ItemsDataSet.Items)
'TODO: This line of code loads data into the 'ItemsDataSet.Items' table. You can move, or remove it, as needed.
Me.ItemsTableAdapter.Fill(Me.ItemsDataSet.Items)
End Sub
Private Sub ItemsDataSetBindingSource_CurrentChanged(sender As Object, e As EventArgs)
End Sub
Private Sub btnedit_Click(sender As Object, e As EventArgs) Handles btnedit.Click
ItemsBindingSource.EndEdit()
ItemsTableAdapter.Update(ItemsDataSet.Items)
MsgBox("Saved")
End Sub
Private Sub btadd_Click(sender As Object, e As EventArgs) Handles btnadd.Click
ItemsBindingSource.AddNew()
MsgBox("Added Successfully")
End Sub
Private Sub btndelete_Click(sender As Object, e As EventArgs) Handles btndelete.Click
ItemsBindingSource.RemoveCurrent()
MsgBox("Item Deleted")
End Sub
Private Sub btnexit_Click(sender As Object, e As EventArgs) Handles btnexit.Click
Close()
End Sub
Private Sub btnprevious_Click(sender As Object, e As EventArgs) Handles btnprevious.Click
ItemsBindingSource.MovePrevious()
End Sub
Private Sub btnnext_Click(sender As Object, e As EventArgs) Handles btnnext.Click
ItemsBindingSource.MoveNext()
End Sub
End Class

Answer 1

You probably have your MDB (ACCDB) file included in your project files.
If you check the properties associated with this project file you will find one named Copy to Output Directory. Set this to Copy Always.
Also your connection string contains the shortcut Data Source = "|DataDirectory|\yourdb.mdb"
If this scenario is correct, then you start your application and the MDB / ACCDB file is copied from the original location to the BIN\DEBUG directory.
You insert your data there without error. When you stop the debug session to fix errors or other problems you restart your application and the fresh copy (but empty) of your db is copied again in the output directory.
To fix this, set the property to Copy Never or change your connection string to point to a fixed location.