在下面的typescript函数中,’this’不会解析为EmailValidator的实例.如何更正此功能,以便它解析为正确的EmailVaildator实例,以便我可以访问_registerServices？
class EmailValidator {
constructor(private _registerServices: RegisterServices) { }
isAvailable(c: AbstractControl): Promise<ValidationResult> {
let q = new Promise((resolve,reject) => {
this._registerServices.emailIsAvailable(antiForgeryToken(),c.value)
.then(result => {
// Need to actually check the result.
resolve({ "emailtaken": true })
},error => {
// Need to communicate the server error? Probably not.
resolve({ "servererror": true })
});
});
return q;
}
}
