Angular 2的Kendo UI上传组件-无法上传答案

【问题标题】：Kendo UI upload component for angular 2 - Cannot uploadAngular 2的Kendo UI上传组件-无法上传
【发布时间】：2017-07-04 05:38:14
【问题描述】：

我是 angular 2 和 web api(.net core) 的 kendo ui。我无法使用剑道上传将文件上传到 web api。

这是我的示例代码： HTML：

    <kendo-upload [saveUrl]="uploadSaveUrl"
                          [removeUrl]="uploadRemoveUrl"
                          (upload)="uploadEventHandler($event)">
    </kendo-upload>

上传事件处理程序

     uploadEventHandler(e: UploadEvent) 
     {
         this.fs.uploadFile(e.files).subscribe(result => { console.log('result', result); });

     }

上传服务：

 uploadFile(file: any) 
 {

    const baseUrl = this.basePath + '/api/Common/UploadFile';

    return this.dah.post(baseUrl, file);
}

网络接口：

    [HttpPost("UploadFile")]
    public string UploadFile(IList<IFormFile> files)
    {

        return "";
    }

在这里，我无法在 api 中获取文件列表。有工作代码吗？？

【问题讨论】：

标签： angular asp.net-core-webapi kendo-ui-angular2 kendo-upload

【解决方案1】：

<kendo-upload #myUpload="kendoUpload" [autoUpload]="false" [saveUrl]="'/api/Attachment/PostFormData'"  (upload)="uploadEventHandler($event)"> </kendo-upload>

component.ts

ploadEventHandler(e: UploadEvent) {
        console.log(e.files[0].uid);
        // you can send extra data here
        e.data = {
            attachmentType: this.typList.filter(x=>x.Uid == e.files[0].uid)[0].type
        };
    }

Web API 控制器

[HttpPost]
        public async Task<HttpResponseMessage> PostFormData()
        {
            // Check if the request contains multipart/form-data.
            if (!Request.Content.IsMimeMultipartContent())
            {
                throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
            }

            string _property = System.Web.HttpContext.Current.Request.Form["attachmentType"];

            string root = HttpContext.Current.Server.MapPath("~/App_Data/uploads");
            var provider = new MultipartFormDataStreamProvider(root);

            try
            {
                // Read the form data.
                await Request.Content.ReadAsMultipartAsync(provider);
                int i = 0;
                // This illustrates how to get the file names.
                foreach (MultipartFileData fileData in provider.FileData)
                {
                    if (string.IsNullOrEmpty(fileData.Headers.ContentDisposition.FileName))
                    {
                        return Request.CreateResponse(HttpStatusCode.NotAcceptable, "This request is not properly formatted");
                    }
                    string fileName = fileData.Headers.ContentDisposition.FileName;
                    if (fileName.StartsWith("\"") && fileName.EndsWith("\""))
                    {
                        fileName = fileName.Trim('"');
                    }
                    if (fileName.Contains(@"/") || fileName.Contains(@"\"))
                    {
                        fileName = Path.GetFileName(fileName);
                    }
                    var ext = Path.GetExtension(fileName);
                    var uniqFileName = $@"{Guid.NewGuid() + "." + ext }";
                    File.Move(fileData.LocalFileName, Path.Combine(root, uniqFileName));
                    i++;
                }
                return Request.CreateResponse(HttpStatusCode.OK);
            }
            catch (System.Exception e)
            {
                return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
            }
        }

【讨论】：

我们如何发送其他参数，比如应用 ID。因此，当我们为其创建记录时，我们可以将此文件与该 applicationId 相关联？
看到我正在发送其他参数 e.data = { attachmentType: this.typList.filter(x=>x.Uid == e.files[0].uid)[0].type } ; // attachmentType is formdata Receiving :- string _property = System.Web.HttpContext.Current.Request.Form["attachmentType"]; // c#

【解决方案2】：

你没有说 'this.dah' 是什么，但是当使用 kendo-upload 'uploadFiles()' 方法时，你可以通过 web-api 服务中的 [FromForm] 属性访问你的文件：

[HttpPost("UploadFile")]
public string UploadFile([FromForm]ICollection<IFormFile> files)
{
  return "";
}

【讨论】：