ReportViewer控件未显示。创建控件时出错-ReportViewer1

Question

尝试在网页中显示报告。无法通过“ https://docs.microsoft.com/en-us/sql/reporting-services/application-integration/integrating-reporting-services-using-reportviewer-controls-get-started?view=sql-server-2016”获得该教程。

我尝试将控件添加到现有项目中而没有运气。然后，我尝试按照指示步骤进行操作，但仍然没有骰子的新项目。在设计器视图中时，控件显示“错误创建控件-ReportViewer1”。该页面运行，但不显示任何内容。

double totalPrice = 0;
 @override
 Widget build(BuildContext context) {

   currentTotal(double x) {
      setState(() {
        totalPrice += x;
      });
   }

   return MaterialApp(
    debugShowCheckedModeBanner: false,
    home: Scaffold(
      body: Center(
        child: FutureBuilder<SearchResult>(
          future: serviceOne.postCall(),
          builder: (context, snapshot) {
            if (snapshot.hasData) {
              if (snapshot.data != null) {
                  return new Material(
                      child: CustomScrollView(
                      slivers: <Widget>[
                          SliverList(
                            delegate: SliverChildListDelegate([
                              ListTile(
                                title: new Text(totalPrice.toString()),
                              )
                           ]),
                          ),

                       ]

                  )

               }
               currentTotal(snapshot.data.price.totalAmount);
              else if (snapshot.hasError) {
                return Text("error....${snapshot.error}");
        }