Question

这是我的BookController.cs文件在这里我试图通过json访问我的数据库它有两个类，第一个是动作结果书，第二个是json结果

    public ActionResult Book()
    {
        return View();
    }
    //1 request failed is shown here.....
    public JsonResult GetAllBook()
    {
        List<Book> allBook = new List<Book>();
        // Here "MyDatabaseEntities " is dbContext, which is created at time of model creation.
        using (LibraryManagmentSystemDBEntities dc = new LibraryManagmentSystemDBEntities())
        {
            allBook = dc.Books.ToList();
        }
        return new JsonResult { Data = allBook, JsonRequestBehavior = JsonRequestBehavior.AllowGet };
    }

这是我的查看文件Book.cshtml脚本部分。即将到来的问题是它没有从数据库中获取数据。相反，它给出了一个错误：

警报（“失败！请重试。”）

如果我截断数据库中的数据，则仅显示标题 “图书ID”，“图书名称”，“图书序列号”，“图书付款人”，“图书出版商名称”

     $(document).ready(function ()
     {
        var hosturl = "http://" + window.location.hostname + ':' + window.location.port + "/Books/GetAllBook";
        console.log(hosturl);
        // This is for Get All Data
        $("#btnAllBook").click(function ()
        {
            $.ajax(
                {
                     url: hosturl,
                     data: "",
                     type: "GET",
                     dataType: "json",
                     success: function (data)
                     {
                        loadData(data);
                     },
                     error: function ()
                     {
                        alert("Failed! Please try again.");
                     }
                 });

        });
        function loadData(data)
        {
           // Here we will format & load/show data
           var tab = $('<table class="myTable"></table>');
           var thead = $('<thead></thead>');
           thead.append('<th>Book ID</th>');
           thead.append('<th>Book Name</th>');
           thead.append('<th>Book Serial Number</th>');
           thead.append('<th>Book Auther</th>');
           thead.append('<th>Book Publisher</th>');

           tab.append(thead);
           $.each(data, function (i, val)
           {
               // Append database data here
               var trow = $('<tr></tr>');
               trow.append('<td>' + val.BookID + '</td>');
               trow.append('<td>' + val.BookName + '</td>');
               trow.append('<td>' + val.BookSerialNumber + '</td>');
               trow.append('<td>' + val.BookAuther + '</td>');
               trow.append('<td>' + val.BookPublisher + '</td>');
               tab.append(trow);
            });
                    $("tr:odd", tab).css('background-color', '#C4C4C4');
                    $("#UpdatePanel").html(tab);
                };

            });

数据库无法以JSON读取

0 个答案: