1     public class TheClass {
 2         public string TheClass_Id { get; set; }
 3         public string ClassId { get; set; }
 4         public string ClassName { get; set; }
 5         //public List<Student> Students { get; set; }
 6     }
 7     public class Students {
 8         public string TheClass_Id { get; set; }
 9         public string Student_Id { get; set; }
10     }
11     public class Student
12     {
13         public string Student_Id { get; set; }
14         public string ID { get; set; }
15         public string Name { get; set; }
16     }

 1    protected void Page_Load(object sender, EventArgs e)
 2         {
 3             if (IsPostBack)
 4             {
 5                 return;
 6             }
 7             ReportDocument report = new ReportDocument();
　　　　　　　　　　//水晶报表文件路径
 8             string ReprtName = Server.MapPath("~/") + "Rplt\\" + "Rplt.rpt";
 9             report.Load(ReprtName);
10 
11            
12             List<TheClass> listthe = new List<TheClass>();
13             for (int i = 0; i < 3; i++)
14             {
15                 TheClass the1 = new TheClass()
16                 {
17                     TheClass_Id = i.ToString(),
18                     ClassId = i.ToString(),
19                     ClassName = i.ToString() + "班",
20                 };
21                 listthe.Add(the1);
22             }
23             List<Student> liststu = new List<Student>();
24             for (int i = 0; i < 3; i++)
25             {
26                 Student the1 = new Student()
27                 {
28                     ID = i.ToString(),
29                     Student_Id = i.ToString(),
30                     Name = i.ToString() + "号",
31                 };
32                 liststu.Add(the1);
33             }
34             List<Students> liststus = new List<Students>();
35             for (int i = 0; i < 3; i++)
36             {
37                 Students the1 = new Students()
38                 {
39                     Student_Id = i.ToString(),
40                     TheClass_Id = i.ToString(),
41                 };
42                 liststus.Add(the1);
43             }
44             DataSet ds = new DataSet();
　　　　　　　　//Tool.LinqHelper.ConvertToTable 此方法 将list装datatable
45             DataTable dt1= Tool.LinqHelper.ConvertToTable(listthe.AsQueryable();
46             dt1.TableName = "TheClass";
47             DataTable dt2 = Tool.LinqHelper.ConvertToTable(liststu.AsQueryable(;
48             dt2.TableName = "Student";
49             DataTable dt3 = Tool.LinqHelper.ConvertToTable(liststus.AsQueryable));
50             dt3.TableName = "Students";
51             ds.Tables.Add(dt1);
52             ds.Tables.Add(dt2);
53             ds.Tables.Add(dt3);
56            report.SetDataSource(ds);
57             this.CrystalReportViewer1.ReportSource = report;
58             this.CrystalReportViewer1.ShowLastPage();
59             this.CrystalReportViewer1.ShowFirstPage();
60         }