如何在listview angular2 nativescript中解析这个json结构 [英] How to parse this json structure in listview angular2 nativescript

问题描述

json 结构:

{
  "Employee": [
       {"id":1,"name":"Dan" },
       {"id":2,"name":"Stack" },
       .....
    ]
}

app.component.ts:

 ngOnInit() {
 console.log("first", "Test");

    this.globalReader.getObjectData()
      .subscribe(data => this.getData = JSON.stringify(data),  ---> Response printed successfully here.I'm able to print it in label.
       error => alert(error),
       () => console.log("finished")

      );      

  }

组件:

  <label text ="{{getData }}" ></label>



  getObjectData() {

    return this._http.get('/page/emp.json')
      .map((response :Response) => response.json());

  }  

之后我不知道如何解析json并将其打印在listview中用于此结构.我提到了一些视频和杂货应用程序.但是我仍然无法得到结果.我对arrayname Employee 非常困惑.

After that I don't know how to parse the json and print it in listview for this structure. I referred some videos and grocery application. But I'm unable to get the result still.I'm very much confused with arrayname Employee.

我只需要在列表视图中打印响应中的 name.

I need to print only the name from response in listview.

推荐答案

这应该有效:

<ListView [items]="employees" row="1">
    <template let-item="item">
        <Label [text]="item.name"></Label>
    </template>
</ListView>

// Create Employee Class:

export class Employee {
    constructor(public id: string, public name: string) {}
}

// Your component:

this.employees: Array<Employee> = [];

ngOnInit() {
    this.globalReader.getObjectData()
        .subscribe(data => { 
                      this.employees = data.Employee.map(item => new Employee(item.id, item.name);
                  }); 
        });      
}

// The getObjectData method of *globalReader* service:

getObjectData() {
    return this._http.get('/page/emp.json')
        .map((response :Response) => response.json().data);
}  

根据 http 调用返回的对象，.data 可能不是必需的:

Depending on the object returned by the http call, the .data may not be required:

getObjectData() {
    return this._http.get('/page/emp.json')
        .map((response :Response) => response.json());
}

这篇关于如何在listview angular2 nativescript中解析这个json结构的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！