SSRS 报表显示页面 asp net session丢失或者找不到 asp net session has expired or could not be found()

触发原因为 当闲置过久 ReportViewer 会重新Loading 导致session过期

设置report viewer control (.cs文件)的

ReportViewer1.KeepSessionAlive = true;
ReportViewer1.AsyncRendering = true;

设置report viewer 页面(.aspx)

<rsweb:ReportViewer  .... KeepSessionAlive="True">
</rsweb:ReportViewer>