Question

以下是我的JSON

[{  "id": "1",
    "name" : "rob",
    "Lastname":"Xyz"
},
{   "id": "2",
    "name" : "xyz",
    "Lastname":"abc"
}]

我有一个表单，用户将输入他的名字和姓氏，我想在这里实现的是检查并查看用户输入信息是否在JSON中可用。如果是用用户信息更新，则使用.push（）

添加新对象

Answer 1

也许这会对你有所帮助：

export class Test {

    // Objects array
    myObjects = [{  "id": "1",
        "name" : "rob",
        "Lastname":"Xyz"
    },
    {   "id": "2",
        "name" : "xyz",
        "Lastname":"abc"
    }]

    // Method responsible for finding an object who has the name passed in as a parameter
    getIndexByName(name: string): number{
        let index: number;

        this.myObjects.forEach(object => {             
            if(object.name == name){ // Do your filtering here
                index = this.myObjects.indexOf(object);
            }    
        })
        return index;
    }

    updateObject(obj: any){
        let index = this.getIndexByName(obj.name);
        if(index){
            this.myObjects.splice(index,1,obj); // This is the usual function that I use when I find myself needing to 'update' something in an array
        }
    }
}

你可以像这样使用它：

let user = {"id": "2", "name" : "xyz", "Lastname":"yjk"};

this.updateObject(user);

Answer 2

var response = await Policies.PolicyWrap.ExecuteAsync(
    ct => _httpClient.PostAsync(/* uri */, new StringContent(request), ct), 
    CancellationToken.None
);

使用Typescripts查找和更新JSON对象

2 个答案: