textBox’a belli bir sayıdan fazla girilmesin — C#
[code lang=”csharp”]
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication13
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
try
{
if (Convert.ToInt32(textBox1.Text) > 30)
{
textBox1.Clear();
MessageBox.Show("Hatalı giriş");
}
}
catch
{
;
}
}
}
}
[/code]



