Asp.net jQuery Datatables AJAX请求未正确命中Web API

我正在尝试将ASP.NET Web API 2与jQuery Datatables 1.10.7集成

我想在我的Datatables中使用服务器端处理，因此我使用Nuget包Datatables.AspNet.WebApi2

这是我的javascript

<script>
    $(document).ready(function () {
        $('#example').dataTable({
            "serverSide": true,
            "ajax": "/api/StudentsBasicInfo/GetPaginatedStudentsList2",
            columns: [
            {
                name: 'FirstName',
                data: 'FirstName',
                title: "First Name",
                sortable: false,
                searchable: false
            },
            {
                name: 'LastName',
                data: "LastName",
                title: "Last Name",
                sortable: false,
                searchable: false
            }
            ]
        });
    });
</script>

我还附上了另一张谷歌浏览器网络日志中我的请求的截图

---

您的

webapi控制器

方法在向

webapi

发送ajax调用时，需要类型为

IDataablesRequest

的对象，但您没有发送任何内容

您需要使用

ajax

的

data

参数发送

IDataTablesRequest对象

。您可以使用javascript中的

object

创建

IDataTablesRequest的对象并发送到webapi

var request = new Object();
request.Length = 10;
request.Start = 1;
$('#example').dataTable( {
  "ajax": {
    "url": "/api/StudentsBasicInfo/GetPaginatedStudentsList2",
    "data": request
  }
});

如果您已将webapi方法修饰为
HttpPost
，则可能还需要将
属性类型设置为
ajax
的
POST

有关更多详细信息，请查看以下链接



    public JsonResult<IDataTablesResponse> GetPaginatedStudentsList2(IDataTablesRequest request)
    {
        StudentsInfoHybrid searchObj = new StudentsInfoHybrid();

        StudentsBasicInfoBL blClass = new StudentsBasicInfoBL();

        try
        {
            searchObj.PageSize = request.Length;
            searchObj.Offset = request.Start;
            searchObj.count = false;

            //get the list of students
            var students = blClass.GetAllStudentsHybridInfo(searchObj);

            //filter list according to the criteria passed in the request object
            var filteredStudents = students.Where(i => i.FirstName.Contains(request.Search.Value)).ToList();

            //reset page size and offset so that count of total objects can be obtained
            searchObj.PageSize = 0;
            searchObj.Offset = 0;

            var totalCount = blClass.CountAllStudentsHybridInfo(searchObj);

            var response = DataTablesResponse.Create(request, students.Count(), filteredStudents.Count(), filteredStudents);

            return new DataTablesJsonResult(response, Request);

        }
        catch (Exception ex)
        {
            return null;
        }
        finally
        { }
    }

{"Message":"An error has occurred.","ExceptionMessage":"A null value was returned where an instance of IHttpActionResult was expected."

var request = new Object();
request.Length = 10;
request.Start = 1;
$('#example').dataTable( {
  "ajax": {
    "url": "/api/StudentsBasicInfo/GetPaginatedStudentsList2",
    "data": request
  }
});