Question

我有使用此控制器的asp net核心应用程序：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using MySql.Data.MySqlClient;
using NewsletterWebsiteSample.Models;
using Newtonsoft.Json;

namespace NewsletterWebsiteSample.Controllers
{
    public class GalleryController : Controller
    {
        private readonly IHostingEnvironment _hostingEnvironment;
        public GalleryController(IHostingEnvironment he)
        {
            _hostingEnvironment = he;
        }

        [HttpPost]
        public IActionResult GetAll()
        {
            ErrorViewModel em = new ErrorViewModel();
            List<string> list = new List<string>();
            string[] files = Directory.GetFiles(_hostingEnvironment.WebRootPath + "\\Uploads\\Images");
            foreach (string file in files)
                list.Add(Path.GetFileName(file));

            em.Message = JsonConvert.SerializeObject(list);
            return View("Empty", em);
        }
    }
}

，当我手动转到该页面时，它可以工作并在页面中返回json字符串，但是当我尝试从我的js文件中获取该字符串时，我的ajax返回错误。这是我在获取代码时使用的代码

$(function () {
    $.ajax({
        type: "POST",
        url: "/Gallery/GetAll",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            alert(data);
        },
        error: function () {
            alert("ERROR");
        }
    });
});

Answer 1

我假设您要返回json格式的文件名列表？所以我将您的代码更改为此

    [HttpGet]
    public IActionResult GetAll()
    {
        ErrorViewModel em = new ErrorViewModel();
        List<string> list = new List<string>();
        string[] files = Directory.GetFiles(_hostingEnvironment.WebRootPath + "\\Uploads\\Images");
        foreach (string file in files)
            list.Add(Path.GetFileName(file));

        return Json(list);
    }

还有您的Ajax代码

$(function () {
    $.ajax({
        type: "GET",
        url: "/Gallery/GetAll",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            console.log(data);
        },
        error: function () {
            alert("ERROR");
        }
    });
});

如果您有任何问题，请告诉我

Answer 2

在mvc内核中，您不应说dataType: "json"。请输入：

$(function () {
    $.ajax({
        type: "GET",
        url: "/Gallery/GetAll",
        contentType: "application/json; charset=utf-8",

        success: function (data) {
            console.log(data);
        },
        error: function () {
            alert("ERROR");
        }
    });
});

Ajax POST方法无法在asp.net核心中运行

2 个答案: