【转】PULL模式下设置子报表的数据源信息

本例为答疑所用，代码原样摘自官方示例

x:\Program Files\CrystalTutorialSampleCodeProjects\CS_Web_RDObjMod_DBLogonSubrpt\CS_Web_RDObjMod_DBLogonSubrpt

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);
                }
            }
        }
    }
}