关于javascript：如何在typescript中使用正则表达式进行电子邮件验证

How to do Email validation using Regular expression in Typescript

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我需要使用typescript angular应用程序验证Excel文件中的电子邮件和日期字段。

我尝试使用正则表达式进行验证，但是对于正确的电子邮件地址，结果总是返回false。

有人能帮我验证电子邮件和日期吗？

下面是我写的代码

组件：

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import { Component } from '@angular/core';
import * as FileSaver from 'file-saver';
import * as XLSX from 'xlsx';
import {UploadService} from '../services//upload.service';

import { FileUploader ,FileItem,ParsedResponseHeaders,FileLikeObject} from 'ng2-file-upload';

import { SpotCheck } from '../models/SpotCheckFields';

@Component ({
selector: 'my-app',
templateUrl:'./excelUpload.html',
providers:[UploadService]
})

export class ExcelUploadComponent {

public SpotChecklist: SpotCheck[];
public project_master:any[];

uploader:FileUploader;

constructor(private uploadservice: UploadService ){
this.SpotChecklist=[];
this.project_master=[];
}
ngOnInit(): void {
this.uploader = new FileUploader({
url: 'http://localhost:5000/upload'
// headers: [{name:'Accept', value:'application/json'}],
// autoUpload: true,
});
this.uploader.onErrorItem = (item, response, status, headers) => this.onErrorItem(item, response, status, headers);
this.uploader.onSuccessItem = (item, response, status, headers) => this.onSuccessItem(item, response, status, headers);

// retrieve projectmaster details
this.getProjectMaster("","SELECT PROJECT MASTER");
}

onSuccessItem(item: FileItem, response: string, status: number, headers: ParsedResponseHeaders): any {
//console.log("onSuccessItem" + status, response, item);
this.SpotChecklist = JSON.parse(response); //success server response

var data = this.validateRow(this.SpotChecklist);

console.log(data);
}

onErrorItem(item: FileItem, response: string, status: number, headers: ParsedResponseHeaders): any {
let error = JSON.parse(response); //error server response
}

validateRow(lst:any[]) : SpotCheck[]
{
var i:number;
for(i=0;i<lst.length ;i++)
{
var validation_message:string="";
var blnErrOccured:boolean=false;

if(!this.isEmail(lst[i].RESPONSIBLE_PERSON_EMAIL_ID))
{
validation_message=validation_message+"," +"RESPONSIBLE_PERSON_EMAIL_ID is invalid"
blnErrOccured=true;
}

lst[i].VALIDATION_RESULT=validation_message;
}
return lst;
}

isDate(date:string) {
// return (new Date(date) !=="Invalid Date") && !isNaN(new Date(date));
}

isEmail(search:string):boolean
{
var serchfind:boolean;

regexp = new RegExp('/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/');

serchfind = regexp.test(search);

console.log(serchfind)
return serchfind
}

getProjectMaster(project_code:string,Flag:string):any
{
this.uploadservice.getProjectMaster(project_code,Flag).subscribe(
response=> {
this.project_master= response[0];
return response;
},
error=> {
console.log("ERROR:",error);
console.log(error.json()); //gives the object object
},
() => {
console.log("Completed");
}
);
}
}