我不确定你指的是什么字符串。 可以使用IReportViewerMessages3接口自定义内置UI中的所有字符串：

http://msdn.microsoft.com/en-us/library/microsoft.reporting.winforms.ireportviewermessages3.aspx

Hello

I posted this in another section but got no answer so hopefully someone here will be able to help :)

I'm trying to use a reportviewer in my windows form application and I can't find a way to add Strings to the reportviewer object. Can someone tell me how this is done? for example I want it to view "Your tasks has been completed" to the reportviewer

Best Regards!

I'm not sure what strings you are referring to.  All of the strings in the built-in UI can be customized using the IReportViewerMessages3 interface:

http://msdn.microsoft.com/en-us/library/microsoft.reporting.winforms.ireportviewermessages3.aspx