Quản lý phần mềm bán vé xe VB
8.419 lượt xem;
- Form_Login.vb
- Form /
- PhanMemBanVeXe_Full /
- project /
1 Imports System.Data.SqlClient
2
3 Public Class Form_Login
4 Private flag As Boolean = False 'Dung kiem soat timer
5 Public LoginLoaiND As String = ""
6 Public LoginTenND As String = ""
7
8 #Region "Event form load da hoan tat nhung chua hay"
9 Private Sub Form_Login_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
10 Tao_ket_noi()
11 Kiem_tra_ket_noi()
12 lblChaoMung.Visible = True
13 PictureBox2.Width = 0
14 End Sub
15 #End Region
16
17 #Region "Kiem tra trang thai ket noi da hoan tat"
18 Private Sub Kiem_tra_ket_noi()
19 Try
20 connect.Open()
21 If connect.State = ConnectionState.Open Then
22 connect.Close()
23 End If
24 Catch ex As Exception
25 MessageBox.Show("Kết nối đến cơ sở dữ liệu không thành công...")
26 Me.Close()
27 End Try
28 End Sub
29 #End Region
30
31 #Region "Hàm kiêm tra tinh hop le cua ket noi"
32 Function Logged(ByVal U As String, ByVal P As String) As Integer
33 Dim strSQL As String = "select IdNguoiDung, PassND, IdLoaiND from NguoiDung where IdNguoiDung = '" + U + "' "
34 Dim Command As SqlCommand = New SqlCommand(strSQL, connect)
35 connect.Open()
36 'dien du lieu nguon vao doi tuong SQLDataReader
37 Dim DataReader As SqlDataReader = Command.ExecuteReader()
38 'Neu ton tai mau tin
39 If DataReader.Read() Then
40 'So sanh password
41 If P = DataReader.GetString(1) Then
42 'Nếu username và password đều hợp le
43 'Dang nhap thanh cong
44 Logged = 0
45 LoginLoaiND = DataReader.GetValue(2).ToString
46 LoginTenND = DataReader.GetValue(0).ToString
47 Else
48 'Sai pass và trả về giá trị -1
49 Logged = -1
50 End If
51 Else
52 'Khong tim thay username trong CSDL, trả về -2
53 Logged = -2
54 End If
55 DataReader.Close()
56 connect.Close()
57 End Function
58 #End Region
59
60 #Region "Event Login_Click da hoan tat"
61 Private Sub cmdLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdLogin.Click
62 If txtUserName.Text = "" Then
63 MsgBox("Please enter your Username")
64 txtUserName.Focus()
65 Exit Sub
66 End If
67 'Yeu cau nguoi su dung nhap lai pass
68 If txtPassword.Text = "" Then
69 MsgBox("Please enter your pass")
70 txtPassword.Focus()
71 Exit Sub
72 End If
73 'Goi ham kiem tra username va pass
74 Dim x As Integer = Logged(txtUserName.Text, txtPassword.Text)
75 If x = -1 Then
76 MsgBox("Bạn nhập sai password")
77 txtPassword.Text = ""
78 txtPassword.Focus()
79 ElseIf x = -2 Then
80 MsgBox("username không tồn tại")
81 txtUserName.Text = ""
82 txtUserName.Focus()
83 Else
84 flag = True
85 End If
86 If flag Then
87 TimerClosing.Start()
88 TimerClosing.Interval = 100
89 End If
90 End Sub
91 #End Region
92
93 #Region "Event Timer_Tick da hoan tat"
94 Private Sub TimerClosing_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TimerClosing.Tick
95 Me.Opacity -= 0.05
96 If Me.Opacity = 0 Then
97 TimerClosing.Stop()
98 Timer2.Stop()
99 Timer1.Stop()
100 flag = False
101 Me.Visible = False
102 Form_Main.Show()
103 Form_Main.WindowState = FormWindowState.Maximized
104 End If
105 End Sub
106 #End Region
107
108 #Region "Event FormClosing da hoan tat"
109 Private Sub FormLogin_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
110 If flag Then
111 e.Cancel() = True
112 Me.TimerClosing.Enabled = True
113 End If
114 End Sub
115 #End Region
116
117 #Region "Su kien Link_Click da hoan tat"
118 Private Sub LinkLabel_Language_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel_Language.LinkClicked
119 If My.Settings.CultureString = "en-US" Then
120 My.Settings.CultureString = "vi-VN"
121 Else
122 My.Settings.CultureString = "en-US"
123 End If
124 My.Settings.Save()
125 Application.Restart()
126 End Sub
127 #End Region
128
129 #Region "Event exit hoan tat"
130 Private Sub cmdExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdExit.Click
131 Try
132 Me.Close()
133 Catch ex As Exception
134 MessageBox.Show("Lỗi đóng chương trình")
135 End Try
136 End Sub
137 #End Region
138
139
140 Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
141 lblChaoMung.Visible = Not lblChaoMung.Visible
142 End Sub
143
144 Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
145 If PictureBox2.Width < PictureBox1.Width Then
146 PictureBox2.Width = PictureBox2.Width + PictureBox1.Width \ 20
147 Else
148 PictureBox2.Width = 0
149 End If
150 End Sub
151 End Class
2
3 Public Class Form_Login
4 Private flag As Boolean = False 'Dung kiem soat timer
5 Public LoginLoaiND As String = ""
6 Public LoginTenND As String = ""
7
8 #Region "Event form load da hoan tat nhung chua hay"
9 Private Sub Form_Login_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
10 Tao_ket_noi()
11 Kiem_tra_ket_noi()
12 lblChaoMung.Visible = True
13 PictureBox2.Width = 0
14 End Sub
15 #End Region
16
17 #Region "Kiem tra trang thai ket noi da hoan tat"
18 Private Sub Kiem_tra_ket_noi()
19 Try
20 connect.Open()
21 If connect.State = ConnectionState.Open Then
22 connect.Close()
23 End If
24 Catch ex As Exception
25 MessageBox.Show("Kết nối đến cơ sở dữ liệu không thành công...")
26 Me.Close()
27 End Try
28 End Sub
29 #End Region
30
31 #Region "Hàm kiêm tra tinh hop le cua ket noi"
32 Function Logged(ByVal U As String, ByVal P As String) As Integer
33 Dim strSQL As String = "select IdNguoiDung, PassND, IdLoaiND from NguoiDung where IdNguoiDung = '" + U + "' "
34 Dim Command As SqlCommand = New SqlCommand(strSQL, connect)
35 connect.Open()
36 'dien du lieu nguon vao doi tuong SQLDataReader
37 Dim DataReader As SqlDataReader = Command.ExecuteReader()
38 'Neu ton tai mau tin
39 If DataReader.Read() Then
40 'So sanh password
41 If P = DataReader.GetString(1) Then
42 'Nếu username và password đều hợp le
43 'Dang nhap thanh cong
44 Logged = 0
45 LoginLoaiND = DataReader.GetValue(2).ToString
46 LoginTenND = DataReader.GetValue(0).ToString
47 Else
48 'Sai pass và trả về giá trị -1
49 Logged = -1
50 End If
51 Else
52 'Khong tim thay username trong CSDL, trả về -2
53 Logged = -2
54 End If
55 DataReader.Close()
56 connect.Close()
57 End Function
58 #End Region
59
60 #Region "Event Login_Click da hoan tat"
61 Private Sub cmdLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdLogin.Click
62 If txtUserName.Text = "" Then
63 MsgBox("Please enter your Username")
64 txtUserName.Focus()
65 Exit Sub
66 End If
67 'Yeu cau nguoi su dung nhap lai pass
68 If txtPassword.Text = "" Then
69 MsgBox("Please enter your pass")
70 txtPassword.Focus()
71 Exit Sub
72 End If
73 'Goi ham kiem tra username va pass
74 Dim x As Integer = Logged(txtUserName.Text, txtPassword.Text)
75 If x = -1 Then
76 MsgBox("Bạn nhập sai password")
77 txtPassword.Text = ""
78 txtPassword.Focus()
79 ElseIf x = -2 Then
80 MsgBox("username không tồn tại")
81 txtUserName.Text = ""
82 txtUserName.Focus()
83 Else
84 flag = True
85 End If
86 If flag Then
87 TimerClosing.Start()
88 TimerClosing.Interval = 100
89 End If
90 End Sub
91 #End Region
92
93 #Region "Event Timer_Tick da hoan tat"
94 Private Sub TimerClosing_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TimerClosing.Tick
95 Me.Opacity -= 0.05
96 If Me.Opacity = 0 Then
97 TimerClosing.Stop()
98 Timer2.Stop()
99 Timer1.Stop()
100 flag = False
101 Me.Visible = False
102 Form_Main.Show()
103 Form_Main.WindowState = FormWindowState.Maximized
104 End If
105 End Sub
106 #End Region
107
108 #Region "Event FormClosing da hoan tat"
109 Private Sub FormLogin_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
110 If flag Then
111 e.Cancel() = True
112 Me.TimerClosing.Enabled = True
113 End If
114 End Sub
115 #End Region
116
117 #Region "Su kien Link_Click da hoan tat"
118 Private Sub LinkLabel_Language_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel_Language.LinkClicked
119 If My.Settings.CultureString = "en-US" Then
120 My.Settings.CultureString = "vi-VN"
121 Else
122 My.Settings.CultureString = "en-US"
123 End If
124 My.Settings.Save()
125 Application.Restart()
126 End Sub
127 #End Region
128
129 #Region "Event exit hoan tat"
130 Private Sub cmdExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdExit.Click
131 Try
132 Me.Close()
133 Catch ex As Exception
134 MessageBox.Show("Lỗi đóng chương trình")
135 End Try
136 End Sub
137 #End Region
138
139
140 Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
141 lblChaoMung.Visible = Not lblChaoMung.Visible
142 End Sub
143
144 Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
145 If PictureBox2.Width < PictureBox1.Width Then
146 PictureBox2.Width = PictureBox2.Width + PictureBox1.Width \ 20
147 Else
148 PictureBox2.Width = 0
149 End If
150 End Sub
151 End Class
