如何上传CSV文件并使用angular2读取它们? [英] How to upload a CSV file and read them using angular2?

问题描述

我需要上传.CSV文件并在我的组件中读取它们，我浏览了此博客，但是它在特定位置存储了.CSV文件，我想上传.CSV文件并阅读它们在我的组件中.我该怎么办

i have a requirement of uploading a .CSV file and read them inside my component, i have gone through this blog but it has a .CSV file stored in a particular loaction, i want to upload the .CSV file and read them inside my component. How can i do it

我们有任何可以使用的内置插件吗?如果没有，那么我们如何才能实现这一目标.

Do we have any build in plugin which we can use? if not then how can we achieve this goal.

这是我尝试过的代码

视图

<input type="file" name="File Upload" id="txtFileUpload" 
        (change)="changeListener($event)" 
        accept=".csv"/>

组件

changeListener($event:Response): void {
    debugger;
   // i am not able to get the data in the CSV file
  }

在changeListener()中，我无法获取.CSV文件的内容，有人可以帮我吗?

in the changeListener(), i am not able tom get the content of the .CSV file, can anyone help me on this?

谢谢

推荐答案

将csv文件上传到某个位置并获取csv文件数据.请尝试以下操作:-

Upload your csv file to a location and get the csv file data. Please try this:-

Component.html:-

<input type="file" class="upload" (change)="changeListener($event.target.files)">

Component.ts:-

public changeListener(files: FileList){
  console.log(files);
  if(files && files.length > 0) {
     let file : File = files.item(0); 
       console.log(file.name);
       console.log(file.size);
       console.log(file.type);
       let reader: FileReader = new FileReader();
       reader.readAsText(file);
       reader.onload = (e) => {
          let csv: string = reader.result as string;
          console.log(csv);
       }
    }
}

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