通过asp.net中的C#将参数传递给CRYSTAL REPORT

Question

我是水晶报告的新手.我通过以下链接设计了水晶报告Crystal Report与SQL存储过程参数和Visual Studio 实际上我需要将不同的ID(SP的输入值)传递给我与Crystal连接的SP报告.

这是我将ID传递给水晶报告的代码:

        protected void Button1_Click(object sender, EventArgs e)
        {
        string QuotationID = ViewState["QUOTATION_ID"].ToString();
        ReportDocument reportDocument = new ReportDocument();
        ParameterField paramField = new ParameterField();
        ParameterFields paramFields = new ParameterFields();
        ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();



        paramField.Name = "@id";


        paramDiscreteValue.Value = QuotationID;

        paramField.CurrentValues.Add(paramDiscreteValue);
        paramFields.Add(paramField);


        paramFields.Add(paramField);

        CrystalReportViewer1.ParameterFieldInfo = paramFields;

        string reportPath = Server.MapPath("~/CrystalReport.rpt");

        reportDocument.Load(reportPath);


        CrystalReportViewer1.ReportSource = reportDocument;
        }

但是当我点击按钮时它会询问ID ...

Answer 1

要在水晶上设置参数,我总是这样做:

ReportDocument reportDocument = new ReportDocument();
reportDocument.Load(reportPath);
reportDocument.SetParameterValue("@id", QuotationID);

如果您想将报告转换为pdf:

var exportOptions = reportDocument.ExportOptions;
exportOptions.ExportDestinationType = ExportDestinationType.NoDestination;
exportOptions.ExportFormatType = ExportFormatType.PortableDocFormat;
var req = new ExportRequestContext {ExportInfo = exportOptions};
var stream = reportDocument.FormatEngine.ExportToStream(req);

这将返回一个您可以从aspx页面打开的文件流.