I was able to use jasperreports from an ASP.NET (C#) application using JNI4NET as a bridge between .NET & JAVA (works two ways), I performed a load test simulating multiple concurrent users through Apache Jmeter & the performance is very good, only the very first call takes some time for the initialization between the two environments to happen. here is what I did: 1)using iReport designer, I built & compiled my report to .jasper file. 2)created a JAVA project in Eclipse referencing jasperreports JAR, the project reads records from a JDBC connection & fills the jasper template generating a PDF. 3)downloaded jni4net-0.8.6.0-bin from (http://jni4net.sourceforge.net/) 4)in Eclipse, export your project as a JAR file to be referenced from within JNI4NET. 5)use the generateProxies tool that comes with the package to generate a proxy for the JAVA class you directly reference from within .NET, several samples are provided within the package, for example in my project I had several classes, one for generating a chart, one for reading from a database, but only one was called directly from .NET to generate a PDF as in below: create an XML file to be used by the generateProxy tool: <TargetDirJvm>workjvm</TargetDirJvm> <TargetDirClr>workclr</TargetDirClr> <ClassPath Path="work/jbridge.jar"/> <!-- my Eclipse project exported to JAR--> <ClassPath Path="lib/jasperreports-4.5.0.jar"/> <!-- ....................--> <JavaClass TypeName="reports.GeneratePDF"/> <!-- the JAVA class that will be directly invoked from within .NET, no need to generate proxies for other indirect classes--> you can see examples on how to call this tool passing the XML file as a parameter in JNI4NET/samples package.
