如何为 LocalReport 设置 `EnableExternalImages = true`

Question

我正在使用报告包 - AspNetCore.Reporting -2.1.0。我想打印带有外部图像的 RDLC 报告。渲染为 pdf 期间发生错误。

An error occurred during local report processing.;Report 'Payslip' contains external images. The EnableExternalImages property has not been set for this report.

渲染我的代码的一部分：

string reportFileName = "Payslip.rdlc";
if (paySlip.IsHourlySalary)
    reportFileName = "Payslip.rdlc";
else
{
    reportFileName = "PaySlipForAnnual.rdlc";
}
string ReportPath;
if (_webHostEnvironment != null)
    ReportPath = Path.Combine(_webHostEnvironment.ContentRootPath + "\\TMReports", reportFileName);
else
{
    ReportPath = Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location) + "/TMReports", reportFileName);
}
LocalReport localReport = new LocalReport(ReportPath);

message += " Before localReport.SetParameters(param);";
message += " Before localReport.DataSources.Add(cd);";
localReport.AddDataSource("dsPaySlip", dtPaySlip); // Add  datasource here    

message += " Before  byte[] bytes = localReport.Render(";
var result = localReport.Execute(RenderType.Pdf, 1, reportParams, mimeType);
               
return result.MainStream;

Answer 1

在渲染之前运行它

localReport.EnableExternalImages = true;

编辑：

似乎您正在使用的开源库没有公开您需要的变量或方法。

但这些方法位于密封类的私有变量中。

所以你仍然可以通过反射改变它的值......

它并不漂亮，但它可以完成工作。

AspNetCore.Reporting.LocalReport rpt = new AspNetCore.Reporting.LocalReport(yourReportPath);
BindingFlags bindFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;
FieldInfo field = rpt.GetType().GetField("localReport", bindFlags);
object rptObj = field.GetValue(rpt);
Type type = rptObj.GetType();
PropertyInfo pi = type.GetProperty("EnableExternalImages");
pi.SetValue(rptObj, true, null);