1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Text;
 6 using System.Windows.Forms;
 7 using CrystalDecisions.Shared;
 8 using CrystalDecisions.CrystalReports.Engine;
 9 using CrystalDecisions.Windows.Forms;
10 using System.Data.OleDb;
11 namespace DyCrystalReportDemo
12 {
13     public partial class Form1 : Form
14     {
15         public Form1()
16         {
17             InitializeComponent();
18         }
19 
20         private void button1_Click(object sender, EventArgs e)
21         {
22             String tblName = comboBox1.Text ;
23              String connstr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Threading.Thread.GetDomain().BaseDirectory+ "bbtcrall.mdb" + ";";
24             
25             if (tblName == "")
26             {
27                 MessageBox.Show("请选择表名");
28                 comboBox1.Focus();
29                 return;
30             }
31 
32             //打开数据库连接
33             
34             DataTable dt1 = new DataTable();
35             DataTable dtx = new DataTable();
36             OleDbDataAdapter da = new OleDbDataAdapter();
37             OleDbConnection cn = new OleDbConnection(connstr);
38             
39             //打开选择的表(注意进行错误保护)
40 
41             //如果要实现任意列，只要更改此处的SQL为具体的字段即可
42             da = new OleDbDataAdapter("SELECT * From " + tblName, cn);
43             da.Fill(dt1);
44 
45             //根据dtl获得实际列数
46             int cols = dt1.Columns.Count;
47             
48 
49             //处理ds1
50             clsDyCrystalReportCore xCore = new clsDyCrystalReportCore();
51             dtx = xCore.dtx(dt1);
52             
53             ReportDocument myReport = new ReportDocument();
54             string reportPath = System.Threading.Thread.GetDomain().BaseDirectory + "crystalreport1.rpt";
55             myReport.Load(reportPath);
56 
57             //绑定数据集，注意，一个报表用一个数据集。
58 
59             myReport.SetDataSource(dtx);
60                 
61             //设置参数，即表头
62             for (int i = 1; i <= 6; i++) 
63             {
64                 if (i <= cols)
65                     myReport.SetParameterValue("p" + i.ToString(), "列名" + i.ToString());
66                 else
67                     //注意，这个不能省，一定要给没用到的参数一个空值
68                     myReport.SetParameterValue("p" + i.ToString(), "");          
69             }
70             crystalReportViewer1.ReportSource = myReport;
71             //crystalReportViewer1.RefreshReport();
72         }
73 
74         private void Form1_Load(object sender, EventArgs e)
75         {          
76             comboBox1.Items.Add ("Test1_1");
77             comboBox1.Items.Add ("Test1_2");        
78         }
79 
80         private void crystalReportViewer1_Load(object sender, EventArgs e)
81         {
82 
83         }
84     }
85 }
86