I am having some issues having my back button properly pop my modal after a user acknowledged that they will lose their changes if they do so. I suppose the issue lies in how to properly await the async method within a method that cannot be async due to how it is coded.
In my code behind I have the following method:
protected override bool OnBackButtonPressed()
{
base.OnBackButtonPressed();
Task<bool> confirm = DisplayAlert("Are you sure?", "All unsaved changes will be lost", "I'm Sure", "Cancel");
confirm.ContinueWith(x =>
{
if(x.Result)
{
var task = Navigation.PopModalAsync();
task.Wait();
}
});
return true;
}
I can see that it does properly hit my breakpoint inside if the user has clicked "I'm Sure". However, after doing that the modal still remains on the page.
I call my modal using the following method (it is wrapped in a NavigationPage as I wanted to be able to leverage Toolbar items, if this is an anti pattern please let me know)
private async void EditSwipeItem_Invoked(object sender, EventArgs e)
{
var unitOfWork = container.Resolve<IUnitOfWork>();
var invoked = sender as SwipeItem;
var element = invoked.BindingContext as InventoryModel;
await Navigation.PushModalAsync(new NavigationPage(new AddEditInventoryList(true, "8dc9e483-1d63-4629-b386-680ad7c9a324", element.InventoryId, unitOfWork)));
}
The code for the backbutton is based off of what I wrote for the CancelToolBar_Clicked, and it works correctly (That is, the modal is popped after the user acknowledges the prompt).
private async void CancelToolBar_Clicked(object sender, EventArgs e)
{
bool confirm = await DisplayAlert("Are you sure?", "All unsaved changes will be lost", "I'm Sure", "Cancel");
if(confirm)
await Navigation.PopModalAsync();
}
Edit:
This is what my XAML looks like:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="Invenutory.Views.Inventory.AddEditInventoryList">
<ContentPage.ToolbarItems>
<ToolbarItem Text="Save"
Order="Primary"
Clicked="SaveToolBarItem_Clicked"
Priority="1"/>
<ToolbarItem Text="Cancel"
Order="Secondary"
Clicked="CancelToolBar_Clicked"
Priority="0"/>
</ContentPage.ToolbarItems>
<ContentPage.Content>
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
Padding="20">
<Frame HorizontalOptions="FillAndExpand"
VerticalOptions="Start"
Padding="20"
CornerRadius="8"
BorderColor="AliceBlue">
<StackLayout
HorizontalOptions="FillAndExpand"
VerticalOptions="StartAndExpand">
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="StartAndExpand"
Orientation="Vertical">
<Label Text="Name: " HorizontalOptions="Start" VerticalOptions="Start" />
<Entry HorizontalOptions="FillAndExpand" VerticalOptions="Start" Text="{Binding Name, Mode=TwoWay}" IsSpellCheckEnabled="True" IsTextPredictionEnabled="True" />
</StackLayout>
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="StartAndExpand"
Orientation="Vertical">
<Label Text="Description: " HorizontalOptions="StartAndExpand" VerticalOptions="Start"/>
<Editor HorizontalOptions="FillAndExpand" VerticalOptions="Start" Text="{Binding Description, Mode=TwoWay}" IsSpellCheckEnabled="True" IsTextPredictionEnabled="True" />
</StackLayout>
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="StartAndExpand"
Orientation="Vertical">
<Label Text="Count: " HorizontalOptions="Start" VerticalOptions="Start"/>
<Entry Keyboard="Numeric" HorizontalOptions="FillAndExpand" VerticalOptions="Start" Text="{Binding Count, Mode=TwoWay}" />
</StackLayout>
</StackLayout>
</Frame>
<Frame HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Padding="20" CornerRadius="8" BorderColor="AliceBlue">
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<Image HorizontalOptions="FillAndExpand" VerticalOptions="Start" HeightRequest="150" Aspect="AspectFit" BackgroundColor="Gray" Source="{Binding CapturedPhoto}" />
<Button Text="Take Photo" HorizontalOptions="FillAndExpand" VerticalOptions="Start" Command="{Binding TakePhotoCommand, Mode=TwoWay}"/>
</StackLayout>
</Frame>
</StackLayout>
</ContentPage.Content>
</ContentPage>
I was able to solve this by updating my inner .ContinueWith to look as follows:
confirm.ContinueWith(x =>
{
if(x.Result)
{
MainThread.BeginInvokeOnMainThread(async () =>
{
await Navigation.PopModalAsync();
});
}
});
Related
This is my xaml:
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="InstagramCloneInterviewApp.MainPage"
x:Name="CurrentPage"
Title="Photos">
<ContentPage.Content>
<Grid>
<StackLayout>
<RefreshView IsRefreshing="{Binding IsRefreshing, Mode=OneWay}"
Command="{Binding LoadRefreshCommand}">
<CollectionView ItemsSource="{Binding Photos}" SelectionMode="Single" SelectedItem="{Binding SelectedPhoto}" RemainingItemsThreshold="{Binding CounterData}" RemainingItemsThresholdReachedCommand="{Binding LoadNewPhotosCommand}" >
<CollectionView.ItemTemplate>
<DataTemplate>
<Grid Padding="10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="3*"/>
</Grid.ColumnDefinitions>
<Grid.GestureRecognizers>
<TapGestureRecognizer Command="{Binding Source={x:Reference CurrentPage}, Path=BindingContext.LoadSelectedPhotoCommand}" />
</Grid.GestureRecognizers>
<Image Aspect="AspectFit" HeightRequest="50" Source="{Binding Url}" Grid.Column="0"></Image>
<Label Text="{Binding Title}" Grid.Column="1"></Label>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</RefreshView>
</StackLayout>
<StackLayout HorizontalOptions="CenterAndExpand" VerticalOptions="Center">
<Frame IsVisible="{Binding IsBusy}" BorderColor="#3498DB" HasShadow="False" BackgroundColor="#eeeeee">
<StackLayout>
<ActivityIndicator IsVisible="{Binding IsBusy}" IsRunning="{Binding IsBusy}" HorizontalOptions="Center" VerticalOptions="Center"></ActivityIndicator>
<Label TextColor="#3498DB" Text="Loading Data, Please Wait..." HorizontalTextAlignment="Center" VerticalTextAlignment="Center" HorizontalOptions="Center" VerticalOptions="Center" IsVisible="{Binding IsBusy}"/>
</StackLayout>
</Frame>
</StackLayout>
</Grid>
</ContentPage.Content>
</ContentPage>
This is SelectedPhoto object in the ViewModel:
public Photo SelectedPhoto
{
get { return selectedPhoto; }
set
{
if (selectedPhoto != value)
{
selectedPhoto = value;
SetProperty(ref selectedPhoto, value);
OnPropertyChanged("SelectedPhoto");
}
}
}
This is the task i get from Grid.TapGestureRecognizer and LoadSelectedPhotoCommand:
async Task ExecuteGetDetailsSelectedPhoto()
{
if (IsBusy)
return;
try
{
var test= SelectedPhoto;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
var msg = ex.Message;
}
finally
{
IsBusy = false;
}
}
var test is always null.
It looks like item is not clicked. Does anyone have a similar experience or better idea to fix this?
The problem was Grid TapGesture override all space and SelectMode not working
I'm building a shopping cart and I have a very annoying problem with a double toolbar being displayed on my pages.
I spent several hours on this and having issues trying to fix it.
My current pages are setup like so:
MainHomePage (This contains a menu and an embedded page titled "MainHomePageDetail")
MainHomePageDetail (this contains a list of images where the user will click on it and it will take them to other pages as well.
PageBulkBuys (This is one of the pages that displays the product details etc)
Problem to be fixed.
I just want to remove the double toolbar that's currently being displayed on the homepage and also the subpages.
Note that if I were to click on one of the menu links, this problem disappears and it only shows one tool bar.
However If I click on one of the links in the homepage, it shows a double tool bar which is really strange.
I've tried a few solutions online but no luck.
Here's my code:
App.CS
public App()
{
InitializeComponent();
MainPage = new NavigationPage(new MainHomePage());
}
MainHomePage XAML
<?xml version="1.0" encoding="utf-8"?>
<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="xxxxx.MainHomePage" xmlns:pages="clr-namespace:xxxxx">
<MasterDetailPage.Master>
<pages:MainHomePageMaster x:Name="MasterPage" />
</MasterDetailPage.Master>
<MasterDetailPage.Detail>
<NavigationPage BarBackgroundColor="Black">
<x:Arguments>
<pages:MainHomePageDetail />
</x:Arguments>
</NavigationPage>
</MasterDetailPage.Detail>
</MasterDetailPage>
MainHomePage CS
public partial class MainHomePage : MasterDetailPage
{
public MainHomePage()
{
InitializeComponent();
MasterPage.ListView.ItemSelected += ListView_ItemSelected;
}
[Obsolete]
private void ListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
{
var item = e.SelectedItem as MainHomePageMenuItem;
if (item == null)
return;
if (item.Id == 10) // BulkBuys
Navigation.PushAsync(new BulkBuys());
}
}
MainHomePageDetail XAML
<?xml version="1.0" encoding="utf-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="xxxx.MainHomePageDetail" Title="xxxx" BackgroundColor="Black">
<ContentPage.ToolbarItems>
<ToolbarItem Name="shoppingcarticon" IconImageSource="xxxxxx.png" Priority="0" Order="Primary" Activated="ShoppingCartClicked"/>
</ContentPage.ToolbarItems>
<StackLayout Padding="10">
<ScrollView HorizontalOptions="FillAndExpand">
<StackLayout>
<Image Source="xxxxx.png" WidthRequest="600" HeightRequest="50"/>
<Label x:Name="labelLoggedInUser" TextColor="White" FontAttributes="Bold" FontSize="18"></Label>
<!-- Banner 1 -->
<Frame x:Name="frame1" BackgroundColor="#2e2e2e">
<StackLayout>
<Image x:Name="Banner1Image" WidthRequest="600" HeightRequest="200">
<Image.GestureRecognizers>
<TapGestureRecognizer
Tapped="BtnBulkBargains"
NumberOfTapsRequired="1" />
</Image.GestureRecognizers>
</Image>
<Frame BackgroundColor="Green" HasShadow="False" Padding="5" HorizontalOptions="Center" WidthRequest="250" HeightRequest="20" CornerRadius="00">
<Label x:Name="Banner1Text" FontAttributes="Bold" FontSize="18" TextColor="White" WidthRequest="80" HorizontalTextAlignment="Center" ></Label>
</Frame>
<Label x:Name="Banner1Header" TextColor="White" HorizontalTextAlignment="Center"></Label>
</StackLayout>
</Frame>
<!-- Banner 2 -->
<Frame x:Name="frame2" BackgroundColor="#2e2e2e">
<StackLayout>
<Image x:Name="Banner2Image" WidthRequest="600" HeightRequest="125"></Image>
</StackLayout>
</Frame>
MainHomePageDetail CS
public MainHomePageDetail()
{
InitializeComponent();
}
private void ShoppingCartClicked(object sender, EventArgs e)
{
Navigation.PushAsync(new ViewFBShoppingCart());
}
BulkBuysPage XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="xxxx.PageBulkBuys"
Title="Bulk Buys"
BackgroundColor="Black"
NavigationPage.HasBackButton="True">
<ContentPage.ToolbarItems>
<ToolbarItem Name="shoppingcarticon" IconImageSource="xxxx.png" Priority="0" Order="Primary" Activated="ShoppingCartClicked"/>
</ContentPage.ToolbarItems>
<ContentPage.Content>
<StackLayout>
<Image Source="xxxx.png" WidthRequest="600" HeightRequest="50"/>
<ListView x:Name="productsListView"
HasUnevenRows="True"
VerticalOptions="FillAndExpand"
SeparatorVisibility="None"
ItemSelected="OnItemSelected">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.View>
<Frame HasShadow="True" Padding="20" Margin="20">
<StackLayout>
<Image Source="{Binding featured_src}"/>
<Label x:Name="labelProductTitle" Text="{Binding title}" FontSize="Medium" />
<Frame BackgroundColor="Red" Padding="5" HorizontalOptions="Center" WidthRequest="80" HeightRequest="20" CornerRadius="00">
<Label WidthRequest="40" Text="{Binding price, StringFormat='${0}'}" TextColor="White" HorizontalTextAlignment="Center"></Label>
</Frame>
</StackLayout>
</Frame>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage.Content>
</ContentPage>
BulkBuysPage CS
public PageBulkBuys()
{
InitializeComponent();
}
private void ShoppingCartClicked(object sender, EventArgs e)
{
Navigation.PushAsync(new ViewFBShoppingCart());
}
Any help would greatly be appreciated.
Because you used the NavigationPage in your App.cs,it will create a toolbar for you：
MainPage = new NavigationPage(new MainHomePage());
try to change it to :
MainPage = new MainHomePage();
or use NavigationPage.SetHasNavigationBar method in your MainHomePage to hide the toolbar :
public App()
{
InitializeComponent();
MainPage = new NavigationPage(new MainHomePage());
}
public MainHomePage()
{
InitializeComponent();
NavigationPage.SetHasNavigationBar(this, false);
MasterPage.ListView.ItemSelected += ListView_ItemSelected;
}
I am trying to display , display alert when I click on "OnLogOut" but is it not woring and I cannot see why
<StackLayout Grid.Row="1" BackgroundColor="White" HorizontalOptions="FillAndExpand" Orientation="Vertical" VerticalOptions="FillAndExpand" Spacing="30" Padding="0,0,0,0">
<StackLayout Orientation="Horizontal" HorizontalOptions="Center">
<!--Le text est dans la classe-->
<Label x:Name="myemail" Text="" TextColor="#36688D" Font="Bold,Italic,20" />
</StackLayout>
<StackLayout Orientation="Horizontal" HorizontalOptions="Center">
<Label HorizontalOptions="Center"
TextColor="#36688D"
FontSize="15"
Text="Log Out" x:Name="mylogout">
<Label.GestureRecognizers>
<TapGestureRecognizer Tapped="OnLogOut" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</StackLayout>
Here is my c# code:
public async void OnLogOut(object sender, EventArgs args)
{
Console.WriteLine("Log out is tapped");
await DisplayAlert("Email", "Your email please", "✔");
}
thanks in advance
I'm looking for the best way to change the content of a page, without navigating to a new one.
I tried having two stacklayouts, and on a button press I'd change the IsVisible and IsEnabled properties of each stack layout. Although this worked, I was left with a small white gap at the end of each layout (I believe this is a Xamarin.Forms bug).
What would be the best way to accomplish this task? Is there anything built into Xamarin.Forms that can do this that I have missed?
Here is a little sketch design for you to see what I mean:
Before suggesting I use tabs, I'll add that I already have tabs in the application, the sketch doesn't show that though. I need this navigation to work on only ONE page.
The code I used before, that didn't work is:
(Before anybody mentions the poor naming conventions and lack of content, I had to strip it all out as it's code written for an employer.
C#:
private void Button1_Clicked(object sender, EventArgs e)
{
Content2.IsVisible = false;
Content2.IsEnabled = false;
Content1.IsVisible = true;
Content1.IsEnabled = true;
}
private void Button2_Clicked(object sender, EventArgs e)
{
Content2.IsVisible = true;
Content2.IsEnabled = true;
Content1.IsEnabled = false;
Content1.IsVisible = false;
}
XML:
<ScrollView x:Name="content1" VerticalOptions="FillAndExpand" BackgroundColor="#f2f2f2">
<StackLayout Spacing="0">
<StackLayout Orientation="Horizontal" BackgroundColor="White" Padding="20,20,20,20" HorizontalOptions="FillAndExpand">
<StackLayout>
<Label Text="text:" FontFamily="{StaticResource BoldFont}"/>
<StackLayout Orientation="Horizontal">
<Image x:Name="content1image" HeightRequest="25" WidthRequest="25"/>
<Label x:Name="content1label" FontFamily="{StaticResource Font}" FontSize="27" TextColor="#969696"/>
</StackLayout>
</StackLayout>
<StackLayout HorizontalOptions="FillAndExpand">
<Entry x:Name="content1Entry" Keyboard="Numeric" Margin="0,25,0,0" Placeholder="0.00000000" FontFamily="{StaticResource Font}" FontSize="27" HorizontalOptions="FillAndExpand" HorizontalTextAlignment="End" TextColor="#969696"/>
<Label x:Name="content1Label2" FontSize="14" FontFamily="{StaticResource Font}" HorizontalOptions="FillAndExpand" HorizontalTextAlignment="End" TextColor="#969696"/>
</StackLayout>
</StackLayout>
<StackLayout Padding="20,30,20,0" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<Label Text="content1Label3" FontFamily="{StaticResource Font}"/>
<StackLayout Orientation="Horizontal">
<Button x:Name="content1button" Image="image.png" BackgroundColor="Transparent" HorizontalOptions="Start" Margin="0" WidthRequest="25" HeightRequest="25"/>
<Entry x:Name="content1Entry2" FontFamily="{StaticResource Font}" FontSize="12" HorizontalOptions="FillAndExpand" HorizontalTextAlignment="End"/>
</StackLayout>
</StackLayout>
<StackLayout VerticalOptions="EndAndExpand" Padding="0,-1,0,0">
<Label x:Name="content1Label4" FontSize="19" HorizontalOptions="CenterAndExpand" FontFamily="{StaticResource Font}"/>
<Label x:Name="content1Label5" FontSize="12" TextColor="#b6b6b6" HorizontalOptions="CenterAndExpand" FontFamily="{StaticResource Font}"/>
<Button x:Name="content1Button2" VerticalOptions="End" HorizontalOptions="FillAndExpand" BorderRadius="25" BackgroundColor="#2r432d" BorderColor="#2r432d" TextColor="White" FontFamily="{StaticResource Font}" FontSize="20" BorderWidth="3" Margin="10,10,10,10"/>
</StackLayout>
</StackLayout>
I have not had very much success using Stacklayouts. Grids however has a lot of customizability and in my case it expands to fill all the area that you wish for.
This is how I would do it.
Xaml
<Grid x:Name="Grid1" IsVisible="False" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" VerticalOptions="CenterAndExpand" HorizontalOptions="CenterAndExpand">
<Label FontSize="Medium" Text="Grid1 Label"/>
</Grid>
<Grid Grid.Row="1" HeightRequest="100" WidthRequest="375" VerticalOptions="StartAndExpand" HorizontalOptions="CenterAndExpand">
<Button x:Name="btnGrid1"/>
</Grid>
</Grid>
<Grid x:Name="Grid2" IsVisible="False" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" VerticalOptions="CenterAndExpand" HorizontalOptions="CenterAndExpand">
<Label FontSize="Medium" Text="Grid2 Label"/>
</Grid>
<Grid Grid.Row="1" HeightRequest="100" WidthRequest="375" VerticalOptions="StartAndExpand" HorizontalOptions="CenterAndExpand">
<Button x:Name="btnGrid2"/>
</Grid>
</Grid>
Code-behind
private void Button1_Clicked(object sender, EventArgs e)
{
Grid2.IsVisible = false;
Grid1.IsVisible = true;
}
private void Button2_Clicked(object sender, EventArgs e)
{
Grid2.IsVisible = true;
Grid1.IsVisible = false;
}
After press, the return button on-screen keyboard the listview hide from the iOS screen. The same code is running perfectly on Android. I have create the 30 second video that will help you understand the problem.
The code file and Video can be download from here https://drive.google.com/drive/folders/1Q4O1KexIHvrCX79AR3CesRXJRWM1o2JR?usp=sharing
<ListView x:Name="listViewOrder" ItemTapped="OnActivitySelected" HasUnevenRows="True">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Frame HasShadow="True" OutlineColor="Silver" Padding="3">
<Grid BackgroundColor="{Binding RowColour}" ColumnSpacing="2" Padding="2">
<StackLayout Orientation="Horizontal" HeightRequest="35" BackgroundColor="{Binding RowColour}" Padding="10">
<StackLayout Spacing="0" BackgroundColor="{Binding RowColour}" Orientation="Horizontal" HorizontalOptions="Start">
<Label FontSize="Medium" TextColor="#707070" Text="{Binding GFIELD3}" HorizontalOptions="StartAndExpand" VerticalOptions="Center"/>
</StackLayout>
<StackLayout Spacing="0" BackgroundColor="{Binding RowColour}" Orientation="Horizontal" HorizontalOptions="EndAndExpand">
<Image Aspect="AspectFit" Source = "{Binding ImageStatus}" HorizontalOptions="StartAndExpand" VerticalOptions="Center" HeightRequest = "20" WidthRequest="20" />
</StackLayout>
</StackLayout>
</Grid>
</Frame>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<StackLayout x:Name="layoutForBluetooth" HeightRequest="200" Padding="5, 5, 5, 5" BackgroundColor="#5DCBEE" Orientation="Horizontal" HorizontalOptions="FillAndExpand">
<Frame Padding="5,5,5,5" HorizontalOptions="FillAndExpand" OutlineColor="Black" HasShadow="True">
<Grid>
<Label Text="Scan Your Barcode" x:Name="lblDriverNumber" TextColor="Black" FontSize="Medium" HorizontalOptions="FillAndExpand" Margin="0,10" />
<Entry x:Name="txtentry" FontSize="Medium" TextColor="Black" WidthRequest="400" HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand" />
</Grid>
</Frame>
async void Txtentry_Completed(object sender, EventArgs e)
{
BiendListview(orderID);
}
public void BiendListview(int OID)
{
try
{
List<GenericFields> GN = new List<GenericFields>();
GN = GetDeliveryOrderItems(OID);
if (GN != null)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}
}
catch (Exception ex)
{
}
}
Please make a breakpoint to debug your GN's value. From your code:
if (GN != null)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}
This if statement will always be true, since you have construct the GN by List<GenericFields> GN = new List<GenericFields>();. It will never be null.
You can try to modify it to:
if (GN.Count != 0)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}