WinForms.ReportViewer显示自定义项目？

I am designing a reporting page using WinForms.ReportViewer and only process the data locally. It means we want to display some information from objects that we designed. For example, we have our own classes for date and time. However, in the report page this date and time information can not be displayed correctly (shows #ERROR). Is there any way to tell it how to show our information? Thanks!I am designing a reporting page using WinForms.