01.private List<string> array = new List<string>();
02. string C = DateTime.Now.ToString("dd/MM/yyyy");
03. private void textBox1_KeyDown_1(object sender,KeyEventArgs e)
04. {
05. if (e.KeyCode == Keys.Enter)
06. {
07. if (textBox1.Text.Length >= 15 || textBox1.Text.Length < 5)
08. {
09. MessageBox.Show("Number Invalid");
10. textBox1.Text = "";
11. return;
12. }
13. string str = ((TextBox) sender).Text;
14. if (!array.Contains(str))
15. {
16. array.Add(str);
17. int Number = Convert.ToInt32(textBox3.Text.ToString());
18. string nb = (++Number).ToString();
19. textBox3.Text = nb;
20. textBox2.Text = textBox1.Text.Substring(0, 4);
21. label5.Text = textBox1.Text;
22. string log = "CheckStock.txt";
23. this.textBox1.Multiline = true;
24. if (File.Exists(log) == true)
25. {
26. f = new FileInfo(log);
27. StreamWriter sw = f.AppendText();
28. sw.WriteLine(C + "\t" + A + "\t" + B + "\t" + textBox1.Text + "\t" + textBox2.Text + "\t" + "1");
29. textBox1.Text = "";
30. sw.Close();
31. }
32. else if (File.Exists(log) == false)
33. {
34. f = new FileInfo(log);
35. StreamWriter sw = f.CreateText();
36. sw.WriteLine(C + "\t" + A + "\t" + B + "\t" + textBox1.Text + "\t" + textBox2.Text + "\t" + "1");
37. textBox1.Text = "";
38. sw.Close();
39. }
40. }
41. else
42. {
43. MessageBox.Show("aaaa");
44. }
45. }
46. }
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