在ASP.NET Core中发布jQuery Datatable会导致400错误

时间:2019-01-25 15:40:55

标签: javascript ajax asp.net-core datatables asp.net-core-mvc

我已经在前端建立了一个DataTables表,并进行了服务器端处理,因为这是一个大数据集。我已经如下设置了Ajax调用,以将其回发到同一应用程序中的MVC控制器。

Ajax呼叫:

ajax: {
    url: '/test',
    type: 'POST',
    contentType: 'application/json',
    dataType: 'json',
    data: function (d) {
        return JSON.stringify(d);
    }
}

控制器:

[Route("[controller]")]
[AllowAnonymous]
public class TestController : Controller
{
    [HttpPost]
    public IActionResult Post([FromBody]DataTablesRequest request)
    {
        // Content removed for brevity
        return Ok();
    }
}

由于某种原因,我总是返回400错误,并且从未执行过控制器操作。我认为这可能与以下事实有关:我也已经实现了.NET Identity,所以也许这是一个授权问题,但是添加[AllowAnonymous]属性并没有帮助,我还尝试将xhrFields: { withCredentials: true }添加到没有影响的Ajax调用。

DataTablesRequest模型看起来像这样:

public class DataTablesRequest
{
    public int Draw { get; set; }
    public int Start { get; set; }
    public int Length { get; set; }
    public DataTablesOrder[] Order { get; set; }
    public DataTablesColumn[] Columns { get; set; }
    public DataTablesSearch Search { get; set; }
}

public class DataTablesOrder
{
    public int Column { get; set; }
    public string Dir { get; set; }
}

public class DataTablesColumn
{
    public string Data { get; set; }
    public string Name { get; set; }
    public bool Searchable { get; set; }
    public bool Orderable { get; set; }
    public DataTablesSearch Search { get; set; }
}

public class DataTablesSearch
{
    public string Value { get; set; }
    public bool Regex { get; set; }
}

...这是在正文中发送的JSON的示例:

{  
   "draw":1,
   "columns":[  
      {  
         "data":"col1",
         "name":"",
         "searchable":true,
         "orderable":true,
         "search":{  
            "value":"",
            "regex":false
         }
      },
      {  
         "data":"col2",
         "name":"",
         "searchable":true,
         "orderable":true,
         "search":{  
            "value":"",
            "regex":false
         }
      },
      {  
         "data":"col3",
         "name":"",
         "searchable":true,
         "orderable":true,
         "search":{  
            "value":"",
            "regex":false
         }
      },
      {  
         "data":"col4",
         "name":"",
         "searchable":true,
         "orderable":true,
         "search":{  
            "value":"",
            "regex":false
         }
      }
   ],
   "order":[  
      {  
         "column":1,
         "dir":"desc"
      }
   ],
   "start":0,
   "length":25,
   "search":{  
      "value":"",
      "regex":false
   }
}

更新

似乎这实际上与SSL有关。我只是在Postman中发送了请求,并检查了显示以下内容的Postman控制台:

enter image description here

2 个答案:

答案 0 :(得分:0)

这是因为您的DataTable ajax发布未正确获取路由。因此,为简单起见,请首先从Controller中删除[Route("[controller]")],然后编写如下:

'ajax': {
     'url': '@Url.Action("Post", "Test")',
     'method': 'POST',
     'contentType': 'application/json',
     'data': function (d) {
          return JSON.stringify(d);
     }
 }

我已经从工作代码中发布了此信息。

如果您需要整个东西,则如下所示:

var dataTable = $("#yourDataTableId").DataTable({
            'processing': true,
            'serverSide': true,
            "order": [[0, 'desc']],
            'ajax': {
                'url': '@Url.Action("Post", "Test")',
                'method': 'POST',
                'contentType': 'application/json',
                'data': function (d) {
                    return JSON.stringify(d);
                }
            },
            "lengthMenu": [[5, 10], [5, 10]],
            "lengthChange": true,
            "searching": true,
            "scrollX": true,
            fixedColumns: {
                leftColumns: 1,
                rightColumns: 1
            },
            'columns': [
                { data: "yourColumnName", name: "YourColumnName" }

                //Other columns

            ]
 });

答案 1 :(得分:0)

您应该从 ApiController 而不是 Controller

来自Get Started with ASP.NET Web API

的示例
using ProductsApp.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web.Http;

namespace ProductsApp.Controllers
{
    public class ProductsController : ApiController
    {
        Product[] products = new Product[] 
        { 
            new Product { Id = 1, Name = "Tomato Soup", Category = "Groceries", Price = 1 }, 
            new Product { Id = 2, Name = "Yo-yo", Category = "Toys", Price = 3.75M }, 
            new Product { Id = 3, Name = "Hammer", Category = "Hardware", Price = 16.99M } 
        };

        public IEnumerable<Product> GetAllProducts()
        {
            return products;
        }

        public IHttpActionResult GetProduct(int id)
        {
            var product = products.FirstOrDefault((p) => p.Id == id);
            if (product == null)
            {
                return NotFound();
            }
            return Ok(product);
        }
    }
}