Database records delete as soon as debugging is stopped - database

Question

When I enter the fields it works and sends the records to the database and if I clear the form and enter another it also sends that one to the database but when I stop debugging, the database is empty.
Is there something wrong with my code?
What should I do to resolve this issue?
• I am using VB.NET with a Microsoft Access database
• There are two pages of code: Control and Create Account Form
Control
Imports System.Data.OleDb
Public Class DBControl
'CREATE YOUR DB CONNECTION
Private DBCon As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;" &
"Data Source=Hotel.mdb;")
'PREPARE DB COMMAND
Private DBCmd As OleDbCommand
'DB DATA
Public DBDA As OleDbDataAdapter
Public DBDT As DataTable
'QUERY PARAMETERS
Public Params As New List(Of OleDbParameter)
'QUERY STATISTICS
Public RecordCount As Integer
Public Exception As String
Public Sub ExecQuery(Query As String)
'RESET QUERY STATS
RecordCount = 0
Exception = ""
Try
'OPEN A CONNECTION
DBCon.Open()
'CREATE DB COMMAND
DBCmd = New OleDbCommand(Query, DBCon)
'LOAD PARAMS INTO DB COMMAND
Params.ForEach(Sub(p) DBCmd.Parameters.Add(p))
'CLEAR PARAMS LIST
Params.Clear()
'EXECUTE COMMAND & FILL DATABASE
DBDT = New DataTable
DBDA = New OleDbDataAdapter(DBCmd)
RecordCount = DBDA.Fill(DBDT)
Catch ex As Exception
Exception = ex.Message
End Try
'CLOSE YOUR CONNECTION
If DBCon.State = ConnectionState.Open Then DBCon.Close()
End Sub
'INCLUDE QUERY & COMMAND PARAMETERS
Public Sub AddParam(Name As String, Value As Object)
Dim NewParam As New OleDbParameter(Name, Value)
Params.Add(NewParam)
End Sub
End Class
Create Account Form
Imports System.Data.OleDb
Public Class Create
Private Access As New DBControl
Private DBCon As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;" &
"Data Source=Hotel.mdb")
Private Sub Create_Load(sender As Object, e As EventArgs) Handles MyBase.Load
If DBCon.State = ConnectionState.Closed Then DBCon.Open() : Exit Sub
End Sub
Private Sub btnCreate_Click(sender As Object, e As EventArgs) Handles btnCreate.Click
AddUser()
End Sub
Private Sub btnCancel_Click(sender As Object, e As EventArgs) Handles btnCancel.Click
txtForename.Clear()
txtSurname.Clear()
txtNumber.Clear()
txtEmail.Clear()
txtPass.Clear()
txtCity.Clear()
End Sub
Private Sub cbxTitle_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cbxTitle.SelectedIndexChanged, txtFirst.TextChanged, txtSurname.TextChanged, txtEmail.TextChanged, txtPass.TextChanged
If Not String.IsNullOrWhiteSpace(cbxTitle.Text) AndAlso Not String.IsNullOrWhiteSpace(txtFirst.Text) AndAlso Not String.IsNullOrWhiteSpace(txtSurname.Text) AndAlso Not String.IsNullOrWhiteSpace(txtEmail.Text) AndAlso txtPass.Text.Length = 8 Then
btnCreate.Enabled = True
End If
End Sub
Private Sub AddUser()
'ADD PARAMETERS
Access.AddParam("#Title", cbxTitle.Text)
Access.AddParam("#Forename", txtForename.Text)
Access.AddParam("#Surname", txtSurname.Text)
Access.AddParam("#Number", txtNumber.Text)
Access.AddParam("#Email", txtEmail.Text)
Access.AddParam("#Pass", txtPass.Text)
Access.AddParam("#City", txtCity.Text)
'EXECUTE INSERT COMMAND
Access.ExecQuery("INSERT INTO Customers([Title], [Forename], [Surname], [Number], [Email], [Pass], [City])" &
"VALUES(#Title, #Forename, #Surname, #Number, #Email, #Pass, #City)")
'REPORT & ABORT ON ERRORS
If Not String.IsNullOrEmpty(Access.Exception) Then MsgBox(Access.Exception) : Exit Sub
DBCon.Close()
End Sub
End Class
Any help is appreciated
Thank you in advance :)

Answer 1

There is a proper way to work with file-based databases in VB.NET.
Add the data file to your project in the Solution Explorer. If you're prompted to copy the file into the project, accept.
Set the Copy To Output Directory property of the data file to Copy If Newer.
Use "|DataDirectory|" to represent the folder path of the data file in your connection string, e.g. Dim connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\Hotel.mdb;".
Now you have two copies of your database. You have the one in the project folder, with the other source files, and the one in the output folder, with the EXE. The source file should stay clean, unsullied by test data. The copy in the output folder is the one you connect to when you debug so that's the one you need to look in to find any changes you make while debugging/testing.
Because you set it to only copy when the source file is newer than the output file, any changes you make while testing will not be lost unless you actually make a change to the source file, e.g. add a column or a table. By default, that property is set to Copy Always, which means that your source file is copied over the output file every time the project is built, so any time any source file changes and you run the project again. That's why your data "disappears".