水晶报表VS2010防止出现用户登录问题

1、联合查询，采用视图办法

2、借用如下语句

using CrystalDecisions.CrystalReports.Engine;

using CrystalDecisions.Shared;

public frmXsjfDy(string sqlpublic)

{

InitializeComponent();

DBClass db = new DBClass();

DataSet ds = db.GetDataSet(sqlpublic);

ReportDocument rpt = new ReportDocument();

if (ds.Tables.Count <= 0)

{

sqlpublic = "select * from sfglb";

ds = db.GetDataSet(sqlpublic);

}

rpt.Load("crXsjf.rpt");

rpt.SetDataSource(ds.Tables[0]);

crystalReportViewer1.ReportSource = rpt;

}