private async static void OnSaveRegisterationClick(object sender, EventArgs e)
 {
     try
     {
         if (DataOperation.WorkingItem != null &&
             (((DataOperation.WorkingItem.InputedPW1).Equals(DataOperation.WorkingItem.InputedPW2)) &&
              DataOperation.WorkingItem.InputedPW1 != null) &&
             (DataOperation.WorkingItem.InputedName.Equals("ThisApplication")))
         {
             Console.WriteLine("what is wrong? {0}", DataOperation.WorkingItem.InputedName.Equals("ThisApplication").ToString());
             AESKEY.Set_AesKey(DataOperation.WorkingItem.InputedPW1);
             Item appacount = new Item
             {
                 NameofApplication = DataOperation.WorkingItem.InputedName,
                 PW   = AESKEY.EncryptStringToBytes_Aes(DataOperation.WorkingItem.InputedPW1),
                 Date = DateTime.UtcNow.ToString()
             };
             if ((await DataOperation.RealTimeDatabase.CreatAPPAccount(appacount)))
             {
                 PageContain.Children.Clear();
                 DataOperation.LogedIN = true;
                 CreateListItemView();
             }
         }
         else
         {
         }
     }
     catch
     {
     }
 }
        public static void LoginEvent(object sender, EventArgs e)
        {
            string encryloginpw;

            AESKEY.Set_AesKey(DataOperation.WorkingItem.InputedPW1);
            encryloginpw = AESKEY.EncryptStringToBytes_Aes(DataOperation.WorkingItem.InputedPW1);

            if (encryloginpw.Equals(DataOperation.AppPW) && DataOperation.AppPW != null)
            {
                DataOperation.LogedIN = true;
                RetrunListView();
            }
            else
            {
                Label infolabe = new Label {
                    Text = "your passowrd is wrong"
                };
                PageContain.Children.Add(infolabe);
            }
        }
 private async static void OnAddSaveClick(object sender, EventArgs e)
 {
     try
     {
         if (DataOperation.WorkingItem != null &&
             (((DataOperation.WorkingItem.InputedPW1).Equals(DataOperation.WorkingItem.InputedPW2)) &&
              DataOperation.WorkingItem.InputedPW1 != null) &&
             DataOperation.WorkingItem.InputedName != null &&
             DataOperation.WorkingItem.InputedUserName != null &&
             (!((DataOperation.WorkingItem.InputedName).Equals("ThisApplication"))))
         {
             Item newitem = new Item
             {
                 NameofApplication = DataOperation.WorkingItem.InputedName,
                 UserName          = AESKEY.EncryptStringToBytes_Aes(DataOperation.WorkingItem.InputedUserName),
                 PW   = AESKEY.EncryptStringToBytes_Aes(DataOperation.WorkingItem.InputedPW1),
                 Date = DateTime.UtcNow.ToString()
             };
             if ((await DataOperation.RealTimeDatabase.AddItemAsync(newitem)))
             {
                 PageContain.Children.Clear();
                 RetrunListView();
             }
         }
         else
         {
             Label infolabe = new Label {
                 Text                    = "It seems something is wrong with your input",
                 FontAttributes          = FontAttributes.Bold,
                 HorizontalTextAlignment = TextAlignment.Center
             };
             PageContain.Children.Add(infolabe);
         }
     }
     catch
     {
     }
 }
 public void EncryptEntry()
 {
     InputedUserName = AESKEY.EncryptStringToBytes_Aes(InputedUserName);
     InputedPW1      = AESKEY.EncryptStringToBytes_Aes(InputedPW1);
 }