Create ASP.NET ReportViewer in a child control in ASP.NET; Document Map button breaks
问题 We are having a strange issue with the Visual Studio 2008 ReportViewer control. Specifically, when we have a child control on a page, and the child control itself hosts a report viewer, and the report has a document map, the postback on the show/hide document map button seems to be lost, so the document map never disappears. I played with IPostBackEventHandler and didn't seem to get anywhere; the ReportViewer itself implements that interface so I didn't think I cared. Anyway, here's the code: