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Below are practical examples compiled from projects for learning and reference purposes

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File name: ClassBLL.cs Copy
15         public void ChuanBi3Table(string MaHK)
16         {
17             //Table 1
18             string sql1 = " select MaSV,'sotinchi'=sum(SoTC) " +
19                        " from KetQua kq,HocPhan hp,NhomHocPhan nhp,KeHoachGiangDay khgd " +
20                        " where kq.MaNhomHP=nhp.MaNhomHP and nhp.MaHP=hp.MaHP and khgd.MaKHGD=nhp.MaKHGD and MaHK='" + MaHK + "' " +
21                        " group by MaSV ";
22             DataTable dt1 = da.GetTable(sql1);
23             for (int i = 0; i < dt1.Rows.Count; i++)
24             {
25                 string sql_1 = "Insert into Loptc values('" + dt1.Rows[i][0] + "'," + dt1.Rows[i][1] + ")";
26                 da.ExcuteNonQuery(sql_1);
27             }
28             //Table 2
29             string sql2 = "select MaSV,'cuoiky'=sum(DiemTk10*SoTC) " +
30                            " from KetQua kq,NhomHocPhan nhp,HocPhan hp,KeHoachGiangDay khdt " +
31                            " where kq.MaNhomHP=nhp.MaNhomHP and nhp.MaHP=hp.MaHP and khdt.MaKHGD=nhp.MaKHGD and MaHK='" + MaHK + "' " +
32                            " group by MaSV ";
33             DataTable dt2 = da.GetTable(sql2);
34             for (int i = 0; i < dt2.Rows.Count; i++)
35             {
36                 string sql_2 = "Insert into Lopdiem10 values('" + dt2.Rows[i][0] + "'," + dt2.Rows[i][1] + ")";
37                 da.ExcuteNonQuery(sql_2);
38             }
39             //Table 3
40             string sql3 = " select Lopdiem10.MaSV,'TrungBinhCuoiKyHe10'=cuoiky/sotinchi " +
41                            " from Lopdiem10 left join Loptc on Loptc.MaSV=Lopdiem10.MaSV";
42             DataTable dt3 = da.GetTable(sql3);
43             for (int i = 0; i < dt3.Rows.Count; i++)
44             {
45                 string sql_3 = "Insert into DTB values('" + dt3.Rows[i][0] + "'," + dt3.Rows[i][1] + ")";
46                 da.ExcuteNonQuery(sql_3);
47             }
48         }
File name: ClassBLL.cs Copy
49         public void ChuanBi3Table()
50         {
51             //Table 1
52             string sql1 = " select MaSV,'sotinchi'=sum(SoTC) " +
53                        " from KetQua kq,HocPhan hp,NhomHocPhan nhp,KeHoachGiangDay khgd " +
54                        " where kq.MaNhomHP=nhp.MaNhomHP and nhp.MaHP=hp.MaHP and khgd.MaKHGD=nhp.MaKHGD " +
55                        " group by MaSV ";
56             DataTable dt1 = da.GetTable(sql1);
57             for (int i = 0; i < dt1.Rows.Count; i++)
58             {
59                 string sql_1 = "Insert into Loptc values('" + dt1.Rows[i][0] + "'," + dt1.Rows[i][1] + ")";
60                 da.ExcuteNonQuery(sql_1);
61             }
62             //Table 2
63             string sql2 = "select MaSV,'cuoiky'=sum(DiemTk10*SoTC) " +
64                            " from KetQua kq,NhomHocPhan nhp,HocPhan hp,KeHoachGiangDay khdt " +
65                            " where kq.MaNhomHP=nhp.MaNhomHP and nhp.MaHP=hp.MaHP and khdt.MaKHGD=nhp.MaKHGD " +
66                            " group by MaSV ";
67             DataTable dt2 = da.GetTable(sql2);
68             for (int i = 0; i < dt2.Rows.Count; i++)
69             {
70                 string sql_2 = "Insert into Lopdiem10 values('" + dt2.Rows[i][0] + "'," + dt2.Rows[i][1] + ")";
71                 da.ExcuteNonQuery(sql_2);
72             }
73             //Table 3
74             string sql3 = " select Lopdiem10.MaSV,'TrungBinhCuoiKyHe10'=cuoiky/sotinchi " +
75                            " from Lopdiem10 left join Loptc on Loptc.MaSV=Lopdiem10.MaSV";
76             DataTable dt3 = da.GetTable(sql3);
77             for (int i = 0; i < dt3.Rows.Count; i++)
78             {
79                 string sql_3 = "Insert into DTB values('" + dt3.Rows[i][0] + "'," + dt3.Rows[i][1] + ")";
80                 da.ExcuteNonQuery(sql_3);
81             }
82         }
File name: ClassBLL.cs Copy
191         public int CheckLogin(string name, string pass)
192         {
193             SqlConnection con = da.GetConnect();
194             SqlCommand cmd = new SqlCommand("select *from Users Where Username='"+name+"' and Password='"+pass+"'",con);
195             con.Open();
196             SqlDataReader dr = cmd.ExecuteReader();
197             if (dr.Read())
198             {
199                 if (dr[2].ToString() == "admin")
200                 {
201                     return 1;
202                 }
203                 else
204                 {
205                     return 2;
206                 }
207             }
208             else
209             {
210                 return -1;
211             }
212         }
File name: ClassBLL.cs Copy
275         public bool Proc_Insert(string proc,string test)
276         {
277             SqlConnection con = da.GetConnect();
278             con.Open();
279             SqlCommand cmd = new SqlCommand(proc, con);
280             cmd.CommandType = CommandType.StoredProcedure;
281             cmd.Parameters.Add("@test", SqlDbType.NVarChar).Value = test;
282             SqlDataReader dr = cmd.ExecuteReader();
283             if (dr.Read())
284             {
285                 return false;
286             }
287             return true;
288         }
File name: ClassDAL.cs Copy
12         public SqlConnection GetConnect()
13         {
14             return new SqlConnection("server=TY-PC;User id=sa;password=04091990;database=CNPM_1");
15         }
File name: crBaoCao.cs Copy
33         public override bool NewGenerator {
34             get {
35                 return true;
36             }
37             set {
38                 // Do nothing
39             }
40         }
File name: crBaoCao.cs Copy
53         public CrystalDecisions.CrystalReports.Engine.Section Section1 {
54             get {
55                 return this.ReportDefinition.Sections[0];
56             }
57         }
File name: crBaoCao.cs Copy
61         public CrystalDecisions.CrystalReports.Engine.Section Section2 {
62             get {
63                 return this.ReportDefinition.Sections[1];
64             }
65         }
File name: crBaoCao.cs Copy
69         public CrystalDecisions.CrystalReports.Engine.Section Section3 {
70             get {
71                 return this.ReportDefinition.Sections[2];
72             }
73         }
File name: crBaoCao.cs Copy
77         public CrystalDecisions.CrystalReports.Engine.Section Section4 {
78             get {
79                 return this.ReportDefinition.Sections[3];
80             }
81         }

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