希望高手发表意见。。以前没有做过这个水晶报表。。查了写资料，大多雷同。。代码也用不了。。
------解决方案--------------------------------------------------------
数据库连接类,需要在webconfig中设置好AppSettings["servername"],AppSettings["userid"],AppSettings["pass"]这三个数据库OLEDB的连接字符串.
- C# code
public class LoginCrystalReport { public void Login(CrystalDecisions.CrystalReports.Engine.ReportDocument report) { string servername, username, password; // t Database Logon to main report servername = System.Configuration.ConfigurationSettings.AppSettings["servername"]; username = System.Configuration.ConfigurationSettings.AppSettings["userid"]; password = System.Configuration.ConfigurationSettings.AppSettings["pass"]; foreach (CrystalDecisions.Shared.IConnectionInfo connection in report.DataSourceConnections) { if (connection.ServerName == servername) { connection.SetLogon(username, password); } } // t 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(username, password); } } } } }