Server
How do I use Server
Below are practical examples compiled from projects for learning and reference purposes
Featured Snippets
File name: ClassDAL.cs
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12 public SqlConnection GetConnect()
13 {
14 return new SqlConnection("server=TY-PC;User id=sa;password=04091990;database=CNPM_1");
15 }
File name: FormBaoCao.cs
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40 private void btnLoc_Click(object sender, EventArgs e)
41 {
42 SqlConnection con = dal.GetConnect();
43 con.Open();
44 string sql = "select *from SinhVien where MaLop=@MaLop";
45 SqlDataAdapter da = new SqlDataAdapter(sql, con);
46 da.SelectCommand.Parameters.AddWithValue("@MaLop", cmbMaLop.SelectedValue.ToString());
47 DataTable dt = new DataTable();
48 da.Fill(dt);
49 crBaoCao cr = new crBaoCao();
50 ConnectionInfo crConnectionInfo = new ConnectionInfo();
51 crConnectionInfo.ServerName = "Ty-PC";
52 crConnectionInfo.DatabaseName = "CNPM_1";
53 crConnectionInfo.UserID = "sa";
54 crConnectionInfo.Password = "04091990";
55 TableLogOnInfos crTableLogonInfos = new TableLogOnInfos();
56 foreach (CrystalDecisions.CrystalReports.Engine.Table table in cr.Database.Tables)
57 {
58 TableLogOnInfo crTableLogonInfo = new TableLogOnInfo();
59 crTableLogonInfo.TableName = table.Name;
60 crTableLogonInfo.ConnectionInfo = crConnectionInfo;
61 crTableLogonInfos.Add(crTableLogonInfo);
62 table.ApplyLogOnInfo(crTableLogonInfo);
63
64 }
65 crvHocKyHocPhan.LogOnInfo = crTableLogonInfos;
66 cr.SetDataSource(dt);
67 ParameterValues a = new ParameterValues();
68 ParameterDiscreteValue b = new ParameterDiscreteValue();
69 b.Value = cmbMaLop.SelectedValue.ToString();
70 a.Add(b);
71 cr.DataDefinition.ParameterFields["txtMaLop"].ApplyCurrentValues(a);
72 crvHocKyHocPhan.ReportSource = cr;
73 crvHocKyHocPhan.Show();
74 }
File name: frmCapNhat.cs
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19 public frmCapNhat()
20 {
21 sqlcon = new SqlConnection("server=.\\sqlexpress;database=QL_Thitracnghiem;integrated security =true");
22 sqlcon.Open();
23 InitializeComponent();
24 }
File name: frmDienTenTS.cs
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16 public frmDienTenTS()
17 {
18 string strCon = "server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security=true";
19 ObjCon = new SqlConnection(strCon);
20 ObjCon.Open();
21 InitializeComponent();
22
23 }
File name: frmKetQua.cs
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18 public frmKetQua(string strten, string strma, string strdiem, string strsocaudung)
19 {
20 string strCon = "server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security=true";
21 ObjCon = new SqlConnection(strCon);
22 ObjCon.Open();
23 InitializeComponent();
24
25
26 getvalueformdienten = strten;//ten
27 getvalueformdienma = strma;//ma thi sinh
28 getvaluediem = strdiem;//diem
29 getvaluesocaudung = strsocaudung;//so cau dung
30 socausai = 50 - int.Parse(strsocaudung);//so cau sai
31 lbsocausai.Text = socausai.ToString();
32 }
File name: frmLogin.cs
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66 private void btLog_Click(object sender, EventArgs e)
67 {
68 try
69 {
70 if (txtdangnhap.Text == "" || txtmatkhau.Text == "")
71 {
72 MessageBox.Show("Bạn chưa điền đầy đủ thông tin", "Có lỗi xảy ra!");
73 txtdangnhap.Focus();
74 return;
75 }
76 if(txtdangnhap.Text=="admin" && txtmatkhau.Text=="admin")
77 {
78 if (MessageBox.Show("Chào mừng bạn đã đến với mục quản lý dành cho giáo viên", "Thông báo", MessageBoxButtons.OK) == DialogResult.OK)
79 {
80 this.Hide();
81 frmQuanLy_Admin admin = new frmQuanLy_Admin();
82 admin.ShowDialog();
83
84 }
85
86 }
87 else
88 {
89 SqlConnection con = new SqlConnection("server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security=true");
90 con.Open();
91 SqlCommand cmd = new SqlCommand("Select MatKhau from THISINH where TenDangNhap ='" + txtdangnhap.Text + "'", con);
92 SqlDataReader reader = cmd.ExecuteReader();
93 reader.Read();
94 if (txtmatkhau.Text == reader.GetValue(0).ToString())
95 {
96 MessageBox.Show("Bạn đã đăng nhập thành công!", "Thành công");
97 reader.Close();
98 con.Close();
99 this.Close();
100 frmLuaChon frmChon = new frmLuaChon();
101 frmChon.ShowDialog();
102 this.Hide();
103
104 }
105 else
106 {
107 MessageBox.Show("Sai Mật Khẩu");
108 txtmatkhau.Focus();
109 }
110 reader.Close();
111 con.Close();
112 }
113
114 }
115
116 catch (Exception)
117 {
118
119 MessageBox.Show("Tên đăng nhập và mật khẩu không hợp lệ","Có lỗi xảy ra");
120 txtdangnhap.Focus();
121
122 }
123 }
File name: frmQuanLySinhVien.cs
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18 public frmQuanLySinhVien()
19 {
20 sqlcon = new SqlConnection("server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security =true");
21 sqlcon.Open();
22 InitializeComponent();
23 }
File name: frmReg.cs
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17 public frmReg()
18 {
19 string strCon ="server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security=true";
20 ObjCon = new SqlConnection(strCon);
21 ObjCon.Open();
22 InitializeComponent();
23 }
File name: frmThiThat.cs
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34 void Load_DeThiThat()
35 {
36 try
37 {
38 SqlConnection cnn = new SqlConnection("server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security =true");
39 SqlDataAdapter da = new SqlDataAdapter("select cauhoi.mach,cauhoi,a,b,c,d ,dapan from cauhoi,DAPAN where cauhoi.mach=DAPAN.mach", cnn);
40 DataTable BangQuestion = new DataTable();
41 da.Fill(BangQuestion);
42 TaoBangRandomCauHoi(BangQuestion);
43 }
44 catch (Exception ex)
45 { MessageBox.Show(ex.Message); }
46 p = 60;//nhap thoi gian thi
47 s = 60;
48 h = 0;
49 }
File name: Lichsuthi.cs
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19 public frmLichsuthi()
20 {
21 sqlcon = new SqlConnection("server=.\\SQLEXPRESS;database=QL_Thitracnghiem;integrated security =true");
22 sqlcon.Open();
23 InitializeComponent();
24 }
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