如何在ASP.NET Core中下载.json文件

Question

我在控制器中的下载方法是

public FileResult GenerateJSON()
{
    string filename = "aa.json";
    string filepath = VariableDeclarations.wwwPath + @"\Downloads\" + filename;
    string filedata = System.IO.File.ReadAllText(filepath);
    string contentType = GetContentType(filepath);

    var cd = new System.Net.Mime.ContentDisposition
    {
        FileName = filename,
        Inline = true
            
    };

    HttpContext.Response.Headers.Add("Content-Disposition",$"attachment;filename=aa.json");

    return File(filedata, "application/json", filename);
}

且视图代码在按钮上单击

function OnClickbtn() {
   

        $.ajax({
        type: "POST",
        url: vGenerateUrl,
        data: { },
        success: function(s) {
            DevExpress.ui.notify({ message: "xyz Generated", width: 1300 }, vSuccessMsgType, 3000);
        },
        error: function(result) {
            onAjaxError(result);
        }
        });
}

按钮单击我的视图，从我的视图中生成.json文件，我需要下载该.JSON文件，应在浏览器中下载，但是在多次努力从ActionResult，ContentResult进行更改之后fileResult我仍然无法在浏览器中下载文件。

我需要在上面的代码中进行哪些更改才能在浏览器中下载.json文件？

Answer 1

以下是浏览器中的关于下载.json文件的演示，您可以参考它。

在视图中：

<input type="button" value="Download Json" onclick="DownloadJson()" />
<script src="https://code.jquery.com/jquery-latest.min.js"></script>
    <script type="text/javascript">
        function DownloadJson() {
            var studentList = [
                { "Name": "John", "score": "30" },
                { "Name": "Rozi", "score": "40" },
                { "Name": "Peter", "score": "50" },
                { "Name": "Finch", "score": "60" },
                { "Name": "Ravi", "score": "70" }
            ];
            //Convert JSON Array to string.
            var json = JSON.stringify(studentList);
            var blob = new Blob([json]);
            var link = document.createElement('a');
            link.href = window.URL.createObjectURL(blob);
            link.download = "studentList.json";
            link.click();
        }
    </script>

结果：

或

public FileContentResult DownloadMission()
        {
            Mission toDownload = new Mission { Id = 1, name = "test" };
            string jsonString = JsonSerializer.Serialize(toDownload);
            var fileName = "test.json";
            var mimeType = "text/plain";
            var fileBytes = Encoding.ASCII.GetBytes(jsonString);
            return new FileContentResult(fileBytes, mimeType)
            {
                FileDownloadName = fileName
            };
        }

任务

  public class Mission
    {
        public int Id { get; set; }
        public string name { get; set; }
    }

结果：