按照帖子设置后，可以在线预览PDF文件，但是office预览报错：
{"actionname":"ShowErrMsg","params":[{"errorTitle":"金蝶温馨提示: 应用服务器发生错误，请联系系统管理员检修！","errorInfo":"发生时间：\t19:02:44\r\n错误编号：\t500\r\n错误信息：\tException of type 'System.Web.HttpUnhandledException' was thrown.\r\n===================================================\r\n调用堆栈：\r\n\r\n at System.Web.UI.Page.HandleError(Exception e)\r\n at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)\r\n at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)\r\n at System.Web.UI.Page.ProcessRequest()\r\n at System.Web.UI.Page.ProcessRequest(HttpContext context)\r\n at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()\r\n at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)\r\n
\r\n发生时间：\t19:02:44\r
错误编号：\t500\r
错误信息：\tException of type 'System.Web.HttpUnhandledException' was thrown.\r
===================================================\r
调用堆栈：\r
at System.Web.UI.Page.HandleError(Exception e)\r
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)\r
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)\r
at System.Web.UI.Page.ProcessRequest()\r
at System.Web.UI.Page.ProcessRequest(HttpContext context)\r
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()\r
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)\r\n"}]}