Hệ thống quản lý thanh toán POS nhà hàng
1 Imports System.Data.OleDb
2 Public Class frmChangePassword
3 Declare Function Wow64DisableWow64FsRedirection Lib "kernel32" (ByRef oldvalue As Long) As Boolean
4 Declare Function Wow64EnableWow64FsRedirection Lib "kernel32" (ByRef oldvalue As Long) As Boolean
5
6 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
7 Try
8 Dim RowsAffected As Integer = 0
9 If Len(Trim(UserID.Text)) = 0 Then
10 MessageBox.Show("Please enter user id", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
11 UserID.Focus()
12 Exit Sub
13 End If
14 If Len(Trim(OldPassword.Text)) = 0 Then
15 MessageBox.Show("Please enter old password", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
16 OldPassword.Focus()
17 Exit Sub
18 End If
19 If Len(Trim(NewPassword.Text)) = 0 Then
20 MessageBox.Show("Please enter new password", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
21 NewPassword.Focus()
22 Exit Sub
23 End If
24 If Len(Trim(ConfirmPassword.Text)) = 0 Then
25 MessageBox.Show("Please confirm new password", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
26 ConfirmPassword.Focus()
27 Exit Sub
28 End If
29 If NewPassword.TextLength < 5 Then
30 MessageBox.Show("The New Password Should be of Atleast 5 Characters", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
31 NewPassword.Text = ""
32 ConfirmPassword.Text = ""
33 NewPassword.Focus()
34 Exit Sub
35 ElseIf NewPassword.Text <> ConfirmPassword.Text Then
36 MessageBox.Show("Password do not match", "Input error", MessageBoxButtons.OK, MessageBoxIcon.Error)
37 NewPassword.Text = ""
38 OldPassword.Text = ""
39 ConfirmPassword.Text = ""
40 OldPassword.Focus()
41 Exit Sub
42 ElseIf OldPassword.Text = NewPassword.Text Then
43 MessageBox.Show("Password is same..Re-enter new password", "Input error", MessageBoxButtons.OK, MessageBoxIcon.Error)
44 NewPassword.Text = ""
45 ConfirmPassword.Text = ""
46 NewPassword.Focus()
47 Exit Sub
48 End If
49 con = New OleDbConnection(cs)
50 con.Open()
51 Dim co As String = "update Registration set [password] =@d1 where userid=@d2 and [password] =@d3"
52 cmd = New OleDbCommand(co)
53 cmd.Parameters.AddWithValue("@d1", Encrypt(NewPassword.Text))
54 cmd.Parameters.AddWithValue("@d2", UserID.Text)
55 cmd.Parameters.AddWithValue("@d3", Encrypt(OldPassword.Text))
56 cmd.Connection = con
57 RowsAffected = cmd.ExecuteNonQuery()
58 If RowsAffected > 0 Then
59 Dim st As String = "Successfully changed the password"
60 LogFunc(UserID.Text, st)
61 frmCustomDialog.ShowDialog()
62 Me.Hide()
63 frmLogin.Show()
64 frmLogin.UserID.Text = ""
65 frmLogin.Password.Text = ""
66 frmLogin.UserID.Focus()
67 Else
68
69 MessageBox.Show("invalid user name or password", "input error", MessageBoxButtons.OK, MessageBoxIcon.Error)
70 UserID.Text = ""
71 NewPassword.Text = ""
72 OldPassword.Text = ""
73 ConfirmPassword.Text = ""
74 UserID.Focus()
75 End If
76 con.Close()
77 Catch ex As Exception
78 MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
79 End Try
80 End Sub
81 Sub OSKeyboard()
82 Dim old As Long
83 If Environment.Is64BitOperatingSystem Then
84 If Wow64DisableWow64FsRedirection(old) Then
85 Process.Start("osk.exe")
86 Wow64EnableWow64FsRedirection(old)
87 End If
88 Else
89 Process.Start("osk.exe")
90 End If
91 End Sub
92 Private Sub frmChangePassword1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
93 Me.Hide()
94 frmLogin.Show()
95 frmLogin.UserID.Text = ""
96 frmLogin.Password.Text = ""
97 frmLogin.UserID.Focus()
98 End Sub
99
100 Private Sub frmChangePassword_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
101 If e.KeyCode = Keys.Enter Then
102 Me.SelectNextControl(Me.ActiveControl, True, True, True, False) 'for Select Next Control
103 End If
104 End Sub
105
106 Private Sub frmChangePassword_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
107 Panel1.Location = New Point(Me.ClientSize.Width / 2 - Panel1.Size.Width / 2, Me.ClientSize.Height / 2 - Panel1.Size.Height / 2)
108 Panel1.Anchor = AnchorStyles.None
109 End Sub
110
111 Private Sub btnCancel_Click(sender As System.Object, e As System.EventArgs) Handles btnCancel.Click
112 Me.Hide()
113 frmLogin.Show()
114 frmLogin.UserID.Text = ""
115 frmLogin.Password.Text = ""
116 frmLogin.UserID.Focus()
117 End Sub
118
119 Private Sub btnKeyboard_Click(sender As System.Object, e As System.EventArgs) Handles btnKeyboard.Click
120 OSKeyboard()
121 End Sub
122 End Class
