javascript - 返回未定义的数组 - 依赖注入(inject)？ Angular/ typescript

Question

我分配一个从端点接收的数组数据。

我尝试在另一个文件中调用这个数组，但它不喜欢!我的 subsidiaryNames 数组控制台正确。

我的第一个文件:

export class EngagementService {
    public orgSubSidNames = [];


    let subsidiaryNames = []
    data.forEach(sub => {
        console.log(sub.SubsidiaryName)
        subsidiaryNames.push(sub.SubsidiaryName)
    })
    subsidiaryNames = subsidiaryNames.filter(this.onlyUnique);
    console.log('subsidiary name array' + subsidiaryNames)
    this.orgSubSidNames = subsidiaryNames;

    // This is just a sample script. Paste your real code (javascript or HTML) here.

    if ('this_is' == /an_example/) {
        of_beautifier();
    } else {
        var a = b ? (c % d) : e[f];
    }

第二个文件:

export class EngagementFilterComponent implements OnInit {
    public subSidNameArray: EngagementService;


    updateSub(data) {
        console.log(data);
        console.log('attempting to print the subsid array' + this.subSidNameArray.orgSubSidNames)
    }

我得到错误:

 Cannot read property 'orgSubSidNames' of undefined

Answer 1

您永远不会设置属性的值 public subSidNameArray: EngagementService;