下例是一个 JSP 页面,它演示了如何为包含 Country 参数的报表设置参数字段。设置了参数后,即会显示报表。
注意: 对于与本教程示例一起使用的任何报表,您必须配置了适当的 JDBC 数据源,以便应用程序服务器能访问它。本例中使用的报表未随附于教程中。
<%@ page import="com.crystaldecisions.report.web.viewer.*" %>
<%@ page import="com.crystaldecisions.sdk.occa.report.data.*" %>
<%@ page import="com.crystaldecisions.reports.sdk.ReportClientDocument" %>
<%
Object reportSource = session.getAttribute("reportSource");
if (reportSource == null)
{
String report = "/reports/sample.rpt";
ReportClientDocument reportClientDoc = new ReportClientDocument();
reportClientDoc.open(report, 0);
reportSource = reportClientDoc.getReportSource();
session.setAttribute("reportSource", reportSource);
}
Fields fields = new Fields();
ParameterField pfield1 = new ParameterField();
Values vals1 = new Values();
ParameterFieldDiscreteValue pfieldDV1 = new ParameterFieldDiscreteValue();
pfield1.setName("Country");
pfield1.setReportName("");
pfieldDV1.setValue("Spain");
pfieldDV1.setDescription("The country is Spain.");
vals1.add(pfieldDV1);
pfield1.setCurrentValues(vals1);
fields.add(pfield1);
CrystalReportViewer viewer = new CrystalReportViewer();
viewer.setReportSource(reportSource);
viewer.setParameterFields(fields);
viewer.setEnableParameterPrompt(false);
if (session.getAttribute("refreshed") == null)
{
viewer.refresh();
session.setAttribute("refreshed", "true");
}
viewer.setOwnPage(true);
viewer.processHttpRequest(request, response, getServletConfig().getServletContext(), null);
%>
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