Return 来自任务的布尔值，用于检查 Firebase 实时数据库中是否存在字符串

Question

任务将两个字符串从 getuser() 传递到 DBFirebase class。然后它使用这些字符串来检查它们是否存在于 Firebase 实时数据库中。我怎样才能 return “CheckLogin”到登录页面？。我尝试将任务更改为任务，但它会阻止将字符串发送到数据库。有什么建议吗？

//LoginPage.xaml.cs
public async void getuser()
        {
            await services.LoginCheck(EmailEntry.Text, PasswordEntry.Text);
                       
        }

//DBFirebase.cs
public async Task LoginCheck(string email, string password)
        {

            var LoginCheck = (await Client.Child("users").OnceAsync<users>()).FirstOrDefault(a => a.Object.email == email && a.Object.password == password);
            if (LoginCheck == null)
            {
                CheckLogin = false;

            }
            else
            {
                CheckLogin = true;
            }

Answer 1

public async Task<bool> LoginCheck(string email, string password)
    {
        bool CheckLogin = false;

        var LoginCheck = (await Client.Child("users").OnceAsync<users>()).FirstOrDefault(a => a.Object.email == email && a.Object.password == password);
        if (LoginCheck == null)
        {
            CheckLogin = false;

        }
        else
        {
            CheckLogin = true;
        }

        return CheckLogin;
    }

调用它

var check = await services.LoginCheck(EmailEntry.Text, PasswordEntry.Text);

Return 来自任务的布尔值，用于检查 Firebase 实时数据库中是否存在字符串

Return Boolean from Task, That checks if string exist in Firebase Realtime Database

firebase

xamarin.forms

firebase-realtime-database