Untitled

//from products.cs 
        public string Imagess { get; set; }


  public async Task<string> GetStudentsKey(string _id)

 {
     var evaluateID = (await client
         .Child("students")
         .OnceAsync<students>()).FirstOrDefault
         (a => a.Object.ID == _id);
     if (evaluateID != null)
     {
         studkey = evaluateID.Key;
         ID = evaluateID.Object.ID;
         fname = evaluateID.Object.FirstName;
         lname = evaluateID.Object.LastName;
         gender = evaluateID.Object.Gender;
         address = evaluateID.Object.Address;
         contactnumber = evaluateID.Object.ContactNumber;
         images = evaluateID.Object.Imagess;

         return evaluateID.Key;
     }
     return null;
 }

//editpage.cs

 private async void btnupdate_Clicked(object sender, EventArgs e)
 {
     var imag = images;
     await _students.EditStudent(txtid.Text, txtfname.Text, txtlname.Text, 
         txtgender.Text, txtaddress.Text, txtcontactnumber.Text, imag);
     await DisplayAlert("Update Successfully", "", "Ok!!");
     Application.Current!.MainPage = new AppShell();
 }
// mainpage.cs

 private async void itemedititstudent_Invoked(object sender, EventArgs e)
 {
     var item = sender as SwipeItemView;
     if (item == null) return;
     if (item.BindingContext is students details)
     {

         studkey = await _Students.GetStudentsKey(details.ID);
         //await DisplayAlert("", images, "Ok");
         await Navigation.PushAsync(new EditStudent());

        
     }
 }