VB.NET Windows Forms Tutorial | Validate Numeric Input in TextBox Before...

Learn how to validate numeric input in a VB.NET Windows Forms application before displaying it in a MessageBox. This beginner-friendly tutorial shows step by step how to ensure users can only enter numbers in a TextBox.

In this tutorial, you will learn:

✔ How to create a VB.NET Windows Forms project

✔ How to add a TextBox and a Button

✔ How to validate numeric input using Double.TryParse

✔ How to show an error message if the input is not a number

✔ How to display valid numeric input in a MessageBox

This tutorial is perfect for beginners and intermediate VB.NET developers who want to create professional, user-friendly Windows Forms applications.

🔹 Technologies used:

- VB.NET

- Windows Forms

- Visual Studio

👍 If you find this tutorial helpful, please **Like**, **Comment**, and **Subscribe** for more VB.NET tutorials.

#VBNet #WindowsForms #NumericInput #MessageBox #TextBoxValidation #Programming #VBNetTutorial

VB.NET Windows Forms Tutorial | Validate User Input Before Displaying in...

In this beginner-friendly VB.NET tutorial, you will learn how to **validate user input** in a Windows Forms application before displaying it in a MessageBox. In this video, we will cover: ✔ How to create a VB.NET Windows Forms project ✔ How to add a TextBox and Button ✔ How to write a Button Click event with input validation ✔ How to show an error if the input is empty ✔ How to display user input safely in a MessageBox This tutorial is perfect for beginners who want to learn **VB.NET Windows Forms** step by step and create professional, user-friendly applications. 🔹 Technologies used: - VB.NET - Windows Forms - Visual Studio 👍 If you find this tutorial helpful, please **Like**, **Comment**, and **Subscribe** for more VB.NET tutorials. #VBNet #WindowsForms #MessageBox #UserInput #InputValidation #Programming #VBNetTutorial

VB.NET Windows Forms Tutorial | Display User Input in a MessageBox

In this beginner-friendly VB.NET tutorial, you will learn how to create a Windows Forms application that displays user input in a MessageBox when a button is clicked. In this video, we will cover: ✔ How to create a VB.NET Windows Forms project ✔ How to add a TextBox and Button ✔ How to write a Button Click event ✔ How to display user input using MessageBox.Show This tutorial is perfect for beginners who want to learn VB.NET Windows Forms step by step. By the end of this video, you'll have your first interactive VB.NET program! 🔹 Technologies used: - VB.NET - Windows Forms - Visual Studio 👍 If you find this tutorial helpful, please **Like**, **Comment**, and **Subscribe** for more VB.NET tutorials. #VBNet #WindowsForms #HelloWorld #MessageBox #UserInput #Programming #VBNetTutorial

VB.NET Windows Forms Tutorial For Beginner| Hello World MessageBox on Bu...

In this beginner-friendly VB.NET tutorial, you will learn how to create a Windows Forms application that displays a "Hello World" message when you click a button. In this video, we will cover: ✔ How to create a VB.NET Windows Forms project ✔ How to design a form and add a button ✔ How to write the Button Click event code ✔ How to display a MessageBox with Hello World This tutorial is perfect for beginners who want to learn VB.NET and Windows Forms step by step. By the end of this video, you'll have your first interactive VB.NET program running! 🔹 Technologies used: - VB.NET - Windows Forms - Visual Studio 👍 If you find this tutorial helpful, please **Like**, **Comment**, and **Subscribe** for more VB.NET tutorials. #vbnet #windowsforms #helloworld #messagebox #ButtonClick #vbnettutorial #programming #learnvbnet #visualbasic #beginnertutorials #vbnetprojects

Add image/picture to database (Part2)

add image/picture to database (Part2)

Add image/picture to database (Part1)

Add image/picture to database

Excel To Xml

Datagridview sort

How to clear Datagridview

There is two ways to clear rows in datagridview :



1- When the datagridview is not assigned to Datasource :

            DataGridView1.Rows.Clear()

2- When the datagridview isassigned to Datasource :

           DataGridView1.DataSource = Nothing
           DataGridView1.DataMember = Nothing
           DataGridView1.Refresh()

Print Datagridview

çi dessous le code complet :

Imports System
Imports System.Text
Imports System.Windows.Forms
Imports System.Drawing

Public Class Form1

Private strFormat As StringFormat
Private arrColumnLefts As New ArrayList
Private arrColumnWidths As New ArrayList
Private iCellHeight As Integer = 0
Private iTotalWidth As Integer = 0
Private iRow As Integer = 0
Private bFirstPage As Boolean = False
Private bNewPage As Boolean = False
Private iHeaderHeight As Integer = 0

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
DataGridView1.Rows.Add("0", "Iheb", "32", "IT Manager", "Tunisia")
DataGridView1.Rows.Add("1", "Sam", "32", "Teacher", "USA")
DataGridView1.Rows.Add("2", "Jhon", "22", "Student", "Philippine")
DataGridView1.Rows.Add("3", "David", "25", "Student", "UK")
End Sub

Private Sub printDocument1_BeginPrint(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintEventArgs) Handles PrintDocument1.BeginPrint

Try

strFormat = New StringFormat
strFormat.Alignment = StringAlignment.Near
strFormat.LineAlignment = StringAlignment.Center
strFormat.Trimming = StringTrimming.EllipsisCharacter

Database query

Datagridview autocomplete textbox

This tutorial will help to make a textbox autocomplete in a datagridview cell

Printdocument

Afficher image dans datagridview

Animation

autocomplete d'un textbox avec une cnx mysql

Comparaison de dates

Impression avec crystal report

connexion mysql et requetes

Voting System