Question

我在Angular上有一个简单的表单，我在其中上传文件和描述。

constructor(private http: HttpClient) { }
upload(files) {
    if (files.length === 0)
      return;

    const formData: FormData = new FormData();

    var filedesc = this.description;

    for (let file of files) {
      formData.append(file.name, file);
      formData.append("Description", filedesc);
}
const uploadReq = new HttpRequest('POST', `api/upload`, formData, {
      reportProgress: true,
    });

在控制器中，我仅获得文件名。

[HttpPost, DisableRequestSizeLimit]
        public  ActionResult UploadFile()
        {
            try
            {
                var fileContent = Request.Form.Files[0];

                string folderName = "Upload";
                var contenttype = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
                string webRootPath = _hostingEnvironment.WebRootPath;
                string newPath = Path.Combine(webRootPath, folderName);
                if (!Directory.Exists(newPath))
                {
                    Directory.CreateDirectory(newPath);
                }
                if (fileContent.Length > 0)
                {
                    if (fileContent.ContentType == contenttype)
                    {
                        string fileName = ContentDispositionHeaderValue.Parse(fileContent.ContentDisposition).FileName.Trim('"');
                        string fullPath = Path.Combine(newPath, fileName);



                        using (var stream = new FileStream(fullPath, FileMode.Create))
                        {
                            fileContent.CopyTo(stream);
                        }

                    }
                    else
                    {
                        return Json("Wrong File Type.");
                    }

我的问题是在这种情况下如何接收描述字符串？还是在一个请求中附加文件和描述是不好的吗？

Answer 1

您必须在操作方法中添加一个参数才能接收描述：

builder.Services.AddScoped<IContractService1, ContractService1>();
builder.Services.AddScoped<IContractService2, ContractService2>();

可以在同一请求中发送带有文件的表格数据。这就是//If you are expecting a single file description public ActionResult UploadFile(string description) { //Logic.. } //If you are expecting multiple file descriptions public ActionResult UploadFile(IEnumerable<string> description) { //Logic.. }内容类型标头的用途。

Answer 2

就像之前说过的Aman B一样，添加一个参数并使用此代码

setState

如何从C＃中的POST请求获取文本

2 个答案: