靈魂-放水

 WinForm：           
                this.crystalReportViewer1.ReportSource = this.customerByLivingPlace1;
                // 數據庫Login
              
                foreach (CrystalDecisions.Shared.IConnectionInfo connection in this.customerByLivingPlace1.DataSourceConnections)
                {
                    connection.SetConnection("localhost", "Real_EstatePC", "**", "**");
                }
                this.crystalReportViewer1.Refresh();
           // 子報表的Login
             foreach (CrystalDecisions.CrystalReports.Engine.ReportDocument sr in document.Subreports)
             {
                 foreach (CrystalDecisions.Shared.IConnectionInfo connection in this.customerByLivingPlace1.DataSourceConnections)
                 {
                      connection.SetConnection("localhost", "Real_EstatePC", "**", "**");
                 }
             }


注：customerByLivingPlace1指向rpt。


WebForm：
 首先,為了登錄方便,將數據庫的用戶名和密碼先寫到Web.config中:
<appSettings>
    <add key="DBServerName" value="你的數據庫服務器" />
    <add key="DBUserID" value="sa" />
    <add key="DBPassWord" value="UU1Tc3lzdGVt" />
</appSettings>

然后寫個類來統一驗證登錄
using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;

namespace BLL
{
    public class LoginCrystalReport
    {        
        public void Login( CrystalDecisions.CrystalReports.Engine.ReportDocument report)
        {
            string serverName=ConfigurationManager.AppSettings["DBServerName"];
            string userId = ConfigurationManager.AppSettings["DBUserID"];

            string passWord=ConfigurationManager.AppSettings["DBPassWord"];
           
            //Set Database Logon to main report
            foreach (CrystalDecisions.Shared.IConnectionInfo connection in report.DataSourceConnections)
            {
                if (connection.ServerName == serverName)
                {
                    connection.SetLogon(userId, passWord);
                }
            }

            //Set Database Logon to subreport
            foreach (CrystalDecisions.CrystalReports.Engine.ReportDocument subreport in report.Subreports)
            {
                foreach (CrystalDecisions.Shared.IConnectionInfo connection in subreport.DataSourceConnections)
                {
                    if (connection.ServerName == serverName)
                    {
                        connection.SetLogon(userId, passWord);
                    }
                }
            }
        }

       
    }
}