javascript – 使用Aurelia将数据和文件发布到ASP.NET webapi

我正在尝试将带有文件上传的输入添加到我的应用程序中.

这是我的视图,有两个输入,一个文本和一个文件：

<template>
  <form class="form-horizontal" submit.delegate="doImport()">
    <div class="form-group">
      <label for="inputLangName" class="col-sm-2 control-label">Language key</label>
      <div class="col-sm-10">
        <input type="text" value.bind="languageKey" class="form-control" id="inputLangName" placeholder="Language key">
      </div>
    </div>
    <div class="form-group">
      <label for="inputFile" class="col-sm-2 control-label">Upload file</label>
      <div class="col-sm-10">
        <input type="file" class="form-control" id="inputFile" accept=".xlsx" files.bind="files">
      </div>
    </div>
    <div class="form-group">
      <div class="col-sm-offset-2 col-sm-10">
        <button type="submit" class="btn btn-default">Do import</button>
      </div>
    </div>
  </form>
</template>

在我的webapi中,我有这个代码,我从here复制并粘贴：

public class ImportLanguageController : ApiController
{
    public async Task<HttpResponseMessage> Post()
    {
        // Check if the request contains multipart/form-data.
        if (!Request.Content.IsMimeMultipartContent())
        {
            throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
        }

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

        try
        {
            // Read the form data.
            await Request.Content.ReadAsMultipartAsync(provider);

            // This illustrates how to get the file names.
            foreach (MultipartFileData file in provider.FileData)
            {
                //Trace.WriteLine(file.Headers.ContentDisposition.FileName);
                //Trace.WriteLine("Server file path: " + file.LocalFileName);
            }
            return Request.CreateResponse(HttpStatusCode.OK);
        }
        catch (System.Exception e)
        {
            return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
        }
    }
}

最后我在Aurelia有我的视图模型：

import {inject} from 'aurelia-framework';
import {HttpClient, json} from 'aurelia-fetch-client';

@inject(HttpClient)
export class Import {
  languageKey = null;
  files = null;

  constructor(http){
    http.configure(config => {
      config
        .useStandardConfiguration();
    });

    this.http = http;
  }

  doImport() {
    //What goes here??
  }
}

所以我的问题是,我的函数doImport中有什么逻辑？我不确定webapi中我的控制器方法中的代码是否正确,随便对此发表评论.

解决方法:

这应该可以帮助您入门：

doImport() {
  var form = new FormData()
  form.append('language', this.languageKey)
  form.append('file', this.files)
  //Edit, try this if the first line dont work for you
  //form.append('file', this.files[0])

  this.http.fetch('YOUR_URL', {
     method: 'post',
     body: form
  })
  .then( response => { 
     // do whatever here

  });
}

根据您提供的webapi响应(如果有),您可能希望使用以下内容：

.then( response => response.json() )
.then( response => {
   // do whatever here
});

我还应该提到的一件事是fetch使用COR,所以如果你遇到任何CORS错误,你可能需要在服务器端启用它们.

这是Aurelia部分的gist.run(除非您更改URL,否则发布将无效)：
https://gist.run/?id=6aa96b19bb75f727271fb061a260f945

标签：javascript,file-upload,asp-net-web-api,aurelia,c-2
来源： https://codeday.me/bug/20190824/1704426.html