Dim query As String = "UPDATE Users SET FirstName=@FirstName, LastName=@LastName, Email=@Email, Age=@Age WHERE UserID=@UserID"
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
If String.IsNullOrWhiteSpace(txtLastName.Text) Then MessageBox.Show("Last Name is required") Return False End If vb.net access database example
Introduction Connecting a VB.NET application to a Microsoft Access database is one of the most common tasks for desktop developers. Whether you're building a small inventory system, a contact manager, or a data entry application, this guide will walk you through everything you need to know.
Private Sub ClearInputs() txtFirstName.Clear() txtLastName.Clear() txtEmail.Clear() txtAge.Clear() txtFirstName.Focus() End Sub Private Sub dgvUsers_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles dgvUsers.CellClick If e.RowIndex >= 0 Then Dim row As DataGridViewRow = dgvUsers.Rows(e.RowIndex) txtFirstName.Text = row.Cells("FirstName").Value.ToString() txtLastName.Text = row.Cells("LastName").Value.ToString() txtEmail.Text = row.Cells("Email").Value.ToString() txtAge.Text = row.Cells("Age").Value.ToString() End If End Sub Here's the complete form code: Dim query As String = "UPDATE Users SET
' Get the UserID from the selected row Dim userID As Integer = Convert.ToInt32(dgvUsers.SelectedRows(0).Cells("UserID").Value)
Dim result As DialogResult = MessageBox.Show("Are you sure you want to delete this record?", "Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) a contact manager
[First Name: TextBox1] [Last Name: TextBox2] [Email: TextBox3] [Age: TextBox4] [Load] [Insert] [Update] [Delete]
' Optional: Display record count lblStatus.Text = $"Loaded dgvUsers.Rows.Count records" End Sub Add this code to the Insert button:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load LoadData() End Sub
Private Sub btnUpdate_Click(sender As Object, e As EventArgs) Handles btnUpdate.Click If dgvUsers.SelectedRows.Count = 0 Then MessageBox.Show("Please select a record to update") Return End If If ValidateInputs() = False Then Exit Sub