角度8“ TypeError：无法读取未定义的属性'length'”

Question

当我想在Angular中返回数组的长度时出现问题，控制台中出现消息“ TypeError：无法读取未定义的属性'length'”。

  count: number = this.organismesFinanceurs.length;
  organismesFinanceurs: OrganismeFinanceur[];
  config: any = {
    itemsPerPage: 7,
    currentPage: 1,
    totalItems: this.count,
  };

ngOnInit() {
   this.serviceHttp2.getAllOrganismes().subscribe(resp => (this.organismesFinanceurs = resp));
}

数组OrganismeFinanceur []如下：

[
{
  "code": "ASS. NAT.",
  "libelleCourt": "FSS ASSEMBLEE NATIONALE",
  "libelleLong": "FONDS DE SECURITE SOCIALE DE L ASSEMBLEE NATIONALE ET DU PERSONNEL"
},
{
  "code": "AUTRE REG.",
  "libelleCourt": "AUTRE REGIME SPECIAL",
  "libelleLong": "AUTRE REGIME SPECIAL"
},
{
  "code": "BANQ.DE FR",
  "libelleCourt": "BANQUE DE FRANCE",
  "libelleLong": "BANQUE DE FRANCE"
},]

Answer 1

尝试使用organismesFinanceurs: OrganismeFinanceur[] = [];