Question

我是TypeScript的新手，我一直坚持使用JSON。我需要创建一个简单的JSON对象，但我仍然没有这样做。这是我的第一次尝试：

output: JSON; //declaration
this.output = {
"col1":{"Attribute1": "value1", "Attribute2": "value2", "Attribute3": "value3"},
"col2":{"Attribute1": "value4", "Attribute2": "value5", "Attribute3": "value6"}, 
"col3":{"Attribute1": "value7", "Attribute2": "value8", "Attribute3": "value9"} 
}

这不起作用。我想我应该使用JSON.stringify函数。这是我的尝试：

obj: any; //new object declaration
this.obj = {
"col1":{"Attribute1": "value1", "Attribute2": "value2", "Attribute3": "value3"},
"col2":{"Attribute1": "value4", "Attribute2": "value5", "Attribute3": "value6"}, 
"col3":{"Attribute1": "value7", "Attribute2": "value8", "Attribute3": "value9"} 
}
this.output.stringify(this.obj);

但是这仍然会调用TypeError。总结一下我的问题：如何在TypeScript中正确创建和初始化JSON对象？

Answer 1

我最终想通了。我所要做的就是将数据创建为“any”变量，如下所示：

output: JSON;
obj: any = 
{
"col1":{"Attribute1": "value1", "Attribute2": "value2", "Attribute3": "value3"},
"col2":{"Attribute1": "value4", "Attribute2": "value5", "Attribute3": "value6"}, 
"col3":{"Attribute1": "value7", "Attribute2": "value8", "Attribute3": "value9"} 
};

然后将其强制转换为JSON对象：

this.output = <JSON>this.obj;

Answer 2

通过这样做，它在Angular 2.4.0 Stable中起作用了：

var request: any = {};
request.allocation = allocationFigure;

Answer 3

您还可以执行以下操作

const rememberUser:JSON = <JSON><unknown>{
        "username": this.credentialsForm.value.username,
        "password": this.credentialsForm.value.password
      }

在TypeScript中初始化JSON对象

3 个答案: