水晶报表无法打开行集问题
我用C#和.net做水晶报表，是要在主报表中添加一个已有的子报表，两个表之间没有关联，只是为了显示才做成主报表与子报表。单个显示主报表与子报表都是没有问题的，但是两个表结合在一起就显示不了，提示说“提供的参数无效，打开行集失败”，不知道是什么原因？ 以下是程序，请大家帮忙解决！谢谢。 我刚注册，所以没有什么分数给大家，不好意思。
BaseClass baseClass = new BaseClass();
SqlConnection con = baseClass.getcon();
con.Open();

string strsql = "select bh ,qtype,question from tb_Test order by qtype,bh asc";
DataSet1 tb_Test = new DataSet1();
SqlDataAdapter sda = new SqlDataAdapter(strsql, con);
sda.Fill(tb_Test, "test");

string strsql1 = "select tkNum ,pdNum,jdNum,testName from tb_testInfo";
DataSet1 tb_testInfo = new DataSet1();
SqlDataAdapter sda1 = new SqlDataAdapter(strsql1, con);
sda1.Fill(tb_Test, "testInfo");


ReportDocument rd = new ReportDocument();

string FilePath = Server.MapPath("CrystalReport3.rpt");

rd.Load(FilePath);
TableLogOnInfo logOnInfo = new TableLogOnInfo();
foreach (CrystalDecisions.CrystalReports.Engine.Table tb in rd.Database.Tables)
{
logOnInfo = tb.LogOnInfo;
logOnInfo.ConnectionInfo.ServerName = "(local)";
logOnInfo.ConnectionInfo.DatabaseName = "testsystem";
logOnInfo.ConnectionInfo.Password = "sa";
logOnInfo.ConnectionInfo.UserID = "sa";
tb.ApplyLogOnInfo(logOnInfo);
}

rd.SetDataSource(tb_Test);
this.CrystalReportViewer1.ReportSource = rd;

[解决办法]
子报表需要单独给与数据登录信息。
请参考

C# code

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using CrystalDecisions.CrystalReports.Engine;using CrystalDecisions.Shared;public partial class _Default : System.Web.UI.Page {    private ReportDocument northwindCustomersReport;    private void ConfigureCrystalReports()    {        northwindCustomersReport = new ReportDocument();        string reportPath = Server.MapPath("NorthwindCustomers.rpt");        northwindCustomersReport.Load(reportPath);        ConnectionInfo connectionInfo = new ConnectionInfo();        connectionInfo.ServerName = "ENXP-50701E";        connectionInfo.DatabaseName = "Northwind";        connectionInfo.IntegratedSecurity = true;        SetDBLogonForReport(connectionInfo, northwindCustomersReport);        SetDBLogonForSubreports(connectionInfo, northwindCustomersReport);        crystalReportViewer.ReportSource = northwindCustomersReport;    }    private void Page_Init(object sender, EventArgs e)    {        ConfigureCrystalReports();    }    private void SetDBLogonForReport(ConnectionInfo connectionInfo, ReportDocument reportDocument)    {        Tables tables = reportDocument.Database.Tables;        foreach (CrystalDecisions.CrystalReports.Engine.Table table in tables)        {            TableLogOnInfo tableLogonInfo = table.LogOnInfo;            tableLogonInfo.ConnectionInfo = connectionInfo;            table.ApplyLogOnInfo(tableLogonInfo);        }    }    private void SetDBLogonForSubreports(ConnectionInfo connectionInfo, ReportDocument reportDocument)    {        Sections sections = reportDocument.ReportDefinition.Sections;        foreach (Section section in sections)        {            ReportObjects reportObjects = section.ReportObjects;            foreach (ReportObject reportObject in reportObjects)            {                if (reportObject.Kind == ReportObjectKind.SubreportObject)                {                    SubreportObject subreportObject = (SubreportObject)reportObject;                    ReportDocument subReportDocument = subreportObject.OpenSubreport(subreportObject.SubreportName);                    SetDBLogonForReport(connectionInfo, subReportDocument);                }            }        }    }}