Vb Winforms

Visual Basic Windows Forms Patterns

Modern Windows Forms development with VB.NET focusing on proper UI threading, data binding, and event handling.

Quick Start

' Form definition
Public Class CustomerForm
    Inherits Form

    Private customerService As ICustomerService
    Private bindingSource As New BindingSource()

    Public Sub New()
        InitializeComponent()
        customerService = New CustomerService()
    End Sub

    ' Async load
    Private Async Sub CustomerForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Await LoadCustomersAsync()
    End Sub

    Private Async Function LoadCustomersAsync() As Task
        Try
            Cursor = Cursors.WaitCursor
            Dim customers = Await customerService.GetAllAsync()
            bindingSource.DataSource = customers
            dataGridView.DataSource = bindingSource
        Catch ex As Exception
            MessageBox.Show($"Error loading customers: {ex.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        Finally
            Cursor = Cursors.Default
        End Try
    End Function
End Class

UI Threading Patterns

Invoke vs BeginInvoke