Database Example: Vb.net Access

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load LoadData() End Sub

Using conn As New OleDbConnection(connectionString) Using cmd As New OleDbCommand(query, conn) ' Add parameters to prevent SQL injection cmd.Parameters.AddWithValue("@FirstName", txtFirstName.Text) cmd.Parameters.AddWithValue("@LastName", txtLastName.Text) cmd.Parameters.AddWithValue("@Email", txtEmail.Text) cmd.Parameters.AddWithValue("@Age", Convert.ToInt32(txtAge.Text)) conn.Open() cmd.ExecuteNonQuery() conn.Close() End Using End Using

[First Name: TextBox1] [Last Name: TextBox2] [Email: TextBox3] [Age: TextBox4] [Load] [Insert] [Update] [Delete] vb.net access database example

Return True End Function Add this to the Update button:

Using conn As New OleDbConnection(connectionString) Using adapter As New OleDbDataAdapter(query, conn) Dim table As New DataTable() adapter.Fill(table) dgvUsers.DataSource = table End Using End Using Private Sub Form1_Load(sender As Object, e As EventArgs)

' Get the UserID from the selected row Dim userID As Integer = Convert.ToInt32(dgvUsers.SelectedRows(0).Cells("UserID").Value)

Private Sub LoadData() Dim query As String = "SELECT * FROM Users" Using conn As New OleDbConnection(connectionString) Using adapter As New OleDbDataAdapter(query, conn) Dim table As New DataTable() adapter.Fill(table) dgvUsers.DataSource = table End Using End Using End Sub Private Sub Form1_Load(sender As Object

Using conn As New OleDbConnection(connectionString) Using cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@FirstName", txtFirstName.Text) cmd.Parameters.AddWithValue("@LastName", txtLastName.Text) cmd.Parameters.AddWithValue("@Email", txtEmail.Text) cmd.Parameters.AddWithValue("@Age", Convert.ToInt32(txtAge.Text)) cmd.Parameters.AddWithValue("@UserID", userID) conn.Open() cmd.ExecuteNonQuery() conn.Close() End Using End Using