急切请教asp.net调用显示报表（包括输入参数和子报表）的问题

[OKILOVE]

想用ReportDocument对象来实现加载报表，因为想自己设置一个输入参数的用户界面（不想用DataSource那个输入参数的界面）。
实例化ReportDocument rpd，装载报表，给报表连接数据库，用ArrayList装进参数，传到rpd中，最后父报表能正确显示。因为没有做过含有子报表的例子，本来觉得子报表的参数是和父报表的参数相联系的，只用传父报表参数即可，然而子报表不能显示。
因此给子报表连接数据库，再相同方法实现给子报表也传入参数，但是调试没语法错误后，报表中的子报表还是无法显示数据。
到底该怎么实现读取子报表？
恳请各位大虾指点！

[OKILOVE]

我就是模仿1楼说的方法来做的，但是我的子报表含有输入参数，因此产生问题了，还希望请教对于有输入参数的子报表
的显示方法。

[NIJIA72]

帮你顶一下

[阿泰]

带参数子报表标准操作方法：

using System;
using System.Data;
using System.Collections;
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 customersByCityReport;
	private const string PARAMETER_FIELD_NAME = "City";
	private const string SUBREPORT_PARAMETER_FIELD_NAME = "OrderDateRange";
	private const string SUBREPORT_NAME = "CustomerOrders";


	protected void Page_Load(object sender, EventArgs e)
    {

    }

	private void Page_Init(object sender, EventArgs e)
	{
		ConfigureCrystalReports();
	}

	private void ConfigureCrystalReports()
	{
		customersByCityReport = new ReportDocument();
		string reportPath = Server.MapPath("CustomersByCity.rpt");
		customersByCityReport.Load(reportPath);

		ArrayList arrayList = new ArrayList();

		string startDate;
		string endDate;

		if (!IsPostBack)
		{
			defaultParameterValuesList.DataSource = GetDefaultValuesFromParameterField(customersByCityReport);
			defaultParameterValuesList.DataBind();
			arrayList.Add("Paris");
			arrayList.Add("Tokyo");
			startDate = "8/1/1997";
			endDate = "8/31/1997";

			Session["arrayList"] = arrayList;
			Session["startDate"] = startDate;
			Session["endDate"] = endDate;
		}

		else 
		{
			arrayList = (ArrayList)Session["arrayList"];
			startDate = Session["startDate"].ToString();
			endDate = Session["endDate"].ToString();
		}

		SetCurrentValuesForParameterField(customersByCityReport, arrayList);

		SetDateRangeForOrders(customersByCityReport, startDate, endDate);

		crystalReportViewer.ReportSource = customersByCityReport;
	}


	private void SetCurrentValuesForParameterField(ReportDocument reportDocument, ArrayList arrayList)
	{
		ParameterValues currentParameterValues = new ParameterValues();
		foreach (object submittedValue in arrayList)
		{
			ParameterDiscreteValue parameterDiscreteValue = new ParameterDiscreteValue();
			parameterDiscreteValue.Value = submittedValue.ToString();
			currentParameterValues.Add(parameterDiscreteValue);
		}

		ParameterFieldDefinitions parameterFieldDefinitions = reportDocument.DataDefinition.ParameterFields;
		ParameterFieldDefinition parameterFieldDefinition = parameterFieldDefinitions[PARAMETER_FIELD_NAME];
		parameterFieldDefinition.ApplyCurrentValues(currentParameterValues);

	}

	private ArrayList GetDefaultValuesFromParameterField(ReportDocument reportDocument)
	{
		ParameterFieldDefinitions parameterFieldDefinitions = reportDocument.DataDefinition.ParameterFields;
		ParameterFieldDefinition parameterFieldDefinition = parameterFieldDefinitions[PARAMETER_FIELD_NAME];
		ParameterValues defaultParameterValues = parameterFieldDefinition.DefaultValues;
		ArrayList arrayList = new ArrayList();
		foreach (ParameterValue parameterValue in defaultParameterValues)
		{
			if (!parameterValue.IsRange)
			{
				ParameterDiscreteValue parameterDiscreteValue = (ParameterDiscreteValue)parameterValue;
				arrayList.Add(parameterDiscreteValue.Value.ToString());
			}

		}
		return arrayList;
	}

	private void SetDateRangeForOrders(ReportDocument reportDocument, string startDate, string endDate)
	{
		ParameterRangeValue parameterRangeValue = new ParameterRangeValue();
		parameterRangeValue.StartValue = startDate;
		parameterRangeValue.EndValue = endDate;
		parameterRangeValue.LowerBoundType = RangeBoundType.BoundInclusive;
		parameterRangeValue.UpperBoundType = RangeBoundType.BoundInclusive;
		ParameterFieldDefinitions parameterFieldDefinitions = reportDocument.DataDefinition.ParameterFields;
		ParameterFieldDefinition parameterFieldDefinition = parameterFieldDefinitions[SUBREPORT_PARAMETER_FIELD_NAME, SUBREPORT_NAME];
		parameterFieldDefinition.CurrentValues.Clear();
		parameterFieldDefinition.CurrentValues.Add(parameterRangeValue);
		parameterFieldDefinition.ApplyCurrentValues(parameterFieldDefinition.CurrentValues);
	}


	protected void redisplay_Click(object sender, EventArgs e)
	{
		ArrayList arrayList = new ArrayList();
		foreach (ListItem item in defaultParameterValuesList.Items)
		{
			if (item.Selected)
			{
				arrayList.Add(item.Value);
			}
		}
		Session["arrayList"] = arrayList;

		Session["startDate"] = orderStartDate.Text;
		Session["endDate"] = orderEndDate.Text;

		ConfigureCrystalReports();
	}
}

[OKILOVE]

谢谢4楼，但是你这个是msdn上向报表传参数的例子吧，我就是模仿这个写的，
我的主报表已经能够传入参数显示正确了，
但是子报表不能正常显示，我用同样的方法向子报表传入参数，
还是不能正常显示，所以才猜想是不是不能用这样的方法。。

[mjjzg]

对图表研究甚少，帮你顶下

[阿泰]

C#版本标准调用方法：

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);
                }
            }
        }
    }
}