像类型一样使用的变量

Question

错误来自 return 语句“'mydata' 是一个变量，但用作类型”如何修复错误？    [HttpGet]    public JsonResult NewData()    {        List<mydatasample> mydata = new List<mydatasample>();         mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test2", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });        return Json(new mydata { }, JsonRequestBehavior.AllowGet);    }

Answer 1

您正在 return 语句上创建另一个对象。请从返回行中删除 new 关键字和 {}。

[HttpGet]

public JsonResult NewData()

{

    List<mydatasample> mydata = new List<mydatasample>(); 

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test2", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

    return Json(mydata, JsonRequestBehavior.AllowGet);

}

Answer 2

正如评论中所说的错误是在返回

   [HttpGet]

    public JsonResult NewData()

    {

        List<mydatasample> mydata = new List<mydatasample>(); 

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test2", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        mydata.Add(new mydatasample { bookName = "test1", publisherName = "yum3", publishYear = 2018 });

        return Json(mydata, JsonRequestBehavior.AllowGet);

    }