来自c#rest服务的Angular 4 json对象

Question

我有一个简单的服务，它将一个 json 字符串发送到一个 json 组件中。如何访问组件中 json 的各个元素。响应如下。

GetExamResult:
"{"Question":"This is the Question","Answer1":"This is 
Answer1","Answer2":"This is Answer2","Answer3":"This is 
Answer3","Answer4":"This is Answer4","Correct":1}"

我试过了 this.answer1 = 数据[0].answer1;

但它给出的变量是未定义的。

这样尝试

getData(){
    this.httpClient.get('someservice')
    .subscribe(
      (data:any[]) => {
        this.ques1 = data[0].GetExamResult.Question1;
        console.log(this.ques1);

  }
)

Answer 1

你可以使用JSON.parse

var json = '{"result":true, "count":42}';
obj = JSON.parse(json);

console.log(obj.count);
// expected output: 42

console.log(obj.result);
// expected output: true

在你的情况下，例如：

var getExamResult = '{ "Question": "This is the Question", "Answer1": "This is Answer1", "Answer2": "This is Answer2" }';
var obj = JSON.parse(getExamResult);

console.log(obj.Answer1);
// expected output: This is Answer1
console.log(obj.Answer2);
// expected output: This is Answer1

Answer 2

data是一个对象，可以直接访问

 this.answer1 = data.answer1;