c# - 调用 HttpRequest.GetBufferlessInputStream 后不支持此方法或属性

Question

我正在尝试使用 Angular Js 和 WEB API 浏览文件并将其从客户端上传到服务器。我使用输入文件类型供用户选择文件并将文件发布到 WEB API。在 Web API 中，出现以下错误“调用 HttpRequest.GetBufferlessInputStream 后不支持此方法或属性。”
我正在使用以下代码:-

     public IHttpActionResult UploadForm()
    {
        HttpResponseMessage response = new HttpResponseMessage();
        var httpRequest = System.Web.HttpContext.Current.Request;
        if (httpRequest.Files.Count > 0)
        {
            foreach (string file in httpRequest.Files)
            {
                var postedFile = httpRequest.Files[file];
                var filePath = System.Web.HttpContext.Current.Server.MapPath("~/UploadFile/" + postedFile.FileName);
                postedFile.SaveAs(filePath);
            }
        }
         return Json("Document Saved");
    }

当我尝试从 HTTP 请求中获取文件时出现此错误...我应该更新 Web 配置中的任何内容吗？

请帮我解决这个问题..

Answer 1

试试这个对我来说效果很好。

        //get the root folder where file will be store
        string root = HttpContext.Current.Server.MapPath("~/UploadFile");

        // Read the form data.
        var provider = new MultipartFormDataStreamProvider(root);
        await Request.Content.ReadAsMultipartAsync(provider);

        if (provider.FileData.Count > 0 && provider.FileData[0] != null)
        {
            MultipartFileData file = provider.FileData[0];

            //clean the file name
            var fileWithoutQuote = file.Headers.ContentDisposition.FileName.Substring(1, file.Headers.ContentDisposition.FileName.Length - 2);

            //get current file directory on the server
            var directory = Path.GetDirectoryName(file.LocalFileName);

            if (directory != null)
            {
                //generate new random file name (not mandatory)
                var randomFileName = Path.Combine(directory, Path.GetRandomFileName());
                var fileExtension = Path.GetExtension(fileWithoutQuote);
                var newfilename = Path.ChangeExtension(randomFileName, fileExtension);

                //Move file to rename existing upload file name with new random filr name
                File.Move(file.LocalFileName, newfilename);

            }
        }