您应该验证RDL的路径（如果存在）。请将此讨论读作： c＃4.0 - 来源尚未指定报告定义 - Stack Overflow [ ^ ]



PS：尝试调试代码，设置断点和进入你的代码，看看错误引发的位置。

You should verify the path to your RDL if it exist. Please give this discussion a read: c# 4.0 - The source of the report definition has not been specified - Stack Overflow[^]

PS: Try to debug your code, set a break point and step into your code to see figure out where the error is thrown.