listview content not displaying when using itemsource

[etawreed]

I have listview and I insert list of data as itemsource for the list but the list item always not displaying and how I can refresh/update list data directly when new item added to list ?

this is my xaml :

         <StackLayout Margin="0,0,230,0"

                              VerticalOptions="Start"

                              Grid.Column="0"

                             Grid.Row="0"

                             Orientation="Vertical">

                    <StackLayout BackgroundColor="{DynamicResource Gray-Bg}">

                        <Grid

            ColumnDefinitions="*, Auto"

            RowDefinitions="Auto, 1"

            RowSpacing="0"

                   >

                            <!-- Table number -->

                            <Label

                Grid.Row="0"

                Grid.Column="0"

                Grid.ColumnSpan="2"

                Margin="16,16,16,5"

                HorizontalOptions="Start"

                Style="{StaticResource TitleLabelStyle}"

                Text="10" />

                            <!-- Order State -->

                            <Label

                Grid.Row="0"

                Grid.Column="1"

                Grid.ColumnSpan="2"

                Margin="16,16,16,5"

                HorizontalOptions="End"

                Style="{StaticResource TitleLabelStyle}"

                Text="Active"

                TextTransform="Uppercase"/>

                        </Grid>

                        <Grid

            ColumnDefinitions="*, Auto"

            RowDefinitions="Auto, 1, Auto, Auto, Auto, Auto, 1, Auto"

            RowSpacing="0">

                            <buttons:SfButton

                               Grid.Column="0"

                                Grid.Row="0"

                                Grid.ColumnSpan="2"

                                Text="PICK UP"

                                HorizontalOptions="Start"

                                Margin="5,10,16,3"

                                TextColor="{StaticResource PrimaryColor}"

                               Style="{StaticResource TransparentButtonStyle}"

                            />

                            <buttons:SfButton

                               Grid.Column="1"

                                Grid.Row="0"

                                Text="ADD CUSTOMERS"

                                HorizontalOptions="End"

                                Grid.ColumnSpan="2"

                                Margin="16,10,0,3"

                                TextColor="{StaticResource PrimaryColor}"

                            Style="{StaticResource TransparentButtonStyle}"

                            />

                        </Grid>

                    </StackLayout>

                          <!-- Order listView -->

   <StackLayout

                            BackgroundColor="White" Orientation="Vertical"

                        HorizontalOptions="Start">

                       <sync:SfListView

                            x:Name="OrdersItemslist"

                                       IsVisible="true"

                                   AllowSwiping="True"

                                         SelectionMode="None"

                                       HeightRequest="568"

                                   ItemSize="50"

                           IsScrollingEnabled="True"

                           IsScrollBarVisible="True">

                            <sync:SfListView.ItemTemplate>

                                <DataTemplate>

                                    <ViewCell>

                                        <ViewCell.View>

                                            <Grid>

                                                <Grid.RowDefinitions>

                                                    <RowDefinition Height="*" />

                                                </Grid.RowDefinitions>

                                                <Label Grid.Row="0" Text="{Binding OrderName}" FontSize="20" TextColor="red"/>

                                            </Grid>

                                        </ViewCell.View>

                                    </ViewCell>

                                </DataTemplate>

                            </sync:SfListView.ItemTemplate>

                            <sync:SfListView.LayoutManager>

                                <sync:GridLayout SpanCount="1"/>

                            </sync:SfListView.LayoutManager>

                        </sync:SfListView>

                    </StackLayout>

                    <StackLayout>

                        <Grid

                        BackgroundColor="{StaticResource PrimaryColor}"

                        ColumnDefinitions="*, Auto"

                        RowDefinitions="Auto, 1"

                        RowSpacing="1">

                            <Label

                Grid.Row="0"

                Margin="16,12,16,16"

                HorizontalOptions="Start"

                LineHeight="{OnPlatform Android=1.25,

                                        Default=-1}"

                Style="{StaticResource TitleLabelStyle}"

                Text="Total"

                FontSize="Medium"

                TextColor="{StaticResource PrimaryText}"/>

                            <Label

                Grid.Row="0"

                Grid.Column="1"

                Margin="16,12,16,16"

                HorizontalOptions="EndAndExpand"

                HorizontalTextAlignment="End"

                LineHeight="OnPlatform Android=1.25,

                                        Default=-1}"

                Style="{StaticResource TitleLabelStyle}"

                Text="{Binding TotalOrderPrice, StringFormat='{0} SR'}"

                 TextColor="{StaticResource PrimaryText}"

                FontSize="Medium"/>

                        </Grid>

                    </StackLayout>

                </StackLayout>

and this is my code:

    private static ObservableCollection<Order> myList;

        public static ObservableCollection<Order> MyList

        {

            get { return myList; }

            set { myList = value; }

        }

 public CartPage(Order orderlist)

        {

            this.InitializeComponent();

            MyList.Add(new Order()

            {

                OrderId = orderlist.OrderId,

                OrderName = orderlist.OrderName,

                OrderQuantity = orderlist.OrderQuantity,

                OrderSize = orderlist.OrderSize,

                OrderState = orderlist.OrderState,

                OrderTotalPrice = orderlist.OrderTotalPrice,

                OrderUnitPrice = orderlist.OrderUnitPrice,

                OptionList = orderlist.OptionList

            });

//Mylist have 3 items inside it

            OrdersItemslist.ItemsSource = MyList;

            OrdersItemslist.IsVisible = true;

          // OrdersItemslist.RefreshView();

        }

[etawreed]

below here is the itemsource = MyList and contain data 

[Lakshmi Natarajan]

Hi etawreed, 

 

Thank you for using Syncfusion products. 

 

We have checked the reported query “listview content not displaying when using itemsource” from our side. We have prepared a sample based on the code snippets provided and we could not reproduce the reported scenario at our side.  

 

Please refer to the tested sample in the following link, 

Sample: https://www.syncfusion.com/downloads/support/forum/167181/ze/ListViewXamarin-1605398826 

 

 

 

Could you please check our sample and let us know if you still facing the same issue?  

 

We suspect that the items not displayed due to the improper binding. Please ensure that binding error occurs or not in the output window. If yes, we suggest you resolve the binding errors to overcome the reported scenario. 

 

Also, could you please share the following details to check further from our side, 

• Share Order class code snippets
• Share orderlist data
• Share issue reproducing video
• Share Syncfusion and Xamarin.Forms versions

 

Regards, 

Lakshmi Natarajan 

[etawreed]

here is my order class :

and I take the orderlist data from this popuo using this code :

when click button the data will sent to CartPage class :

in the CartPage there are 2 constructor 1- default and the second constructor will Fills the data in the list and this is the code :

and this is my xaml for listview :

this is the popup screen and take the data from it:

finally the list will be shown in left white space after click add to cart button :

the xamarin form version is 5.0.0.2012

the syncfusion version is 19.2.0.44

[etawreed]

It still does not appear and I have attached pictures of the code and screens. Is there a suggestion for help?

[Lakshmi Natarajan]

Hi etawreed, 

 

Thank you for the update. 

 

Based on the code snippets provided, we could reproduce the reported scenario at our side. We would like to inform you that the reported scenario occurs since you are creating separate instance of the ChatPage with data for ListView, but the new ChatPage is not added to the application. In other words, we need to add the page to the pages stack when creating a new page at run time. 

 

Please refer to the following code snippets to replace the new page to the existing page,   

private void SfButton_Clicked(object sender, EventArgs e) 

{ 

    Random r = new Random(); 

             

    var 0 = new Order(); 

    ... 

 

    CartPage cartPage = new CartPage(o); 

 

    //Add the new page to the MainPage instance. 

    App.Current.MainPage = cartPage; 

 

    //CloseAllPopup 

    this.IsOpen = false; 

 

} 

 

Please let us know if you need further assistance. 

 

Regards, 

Lakshmi Natarajan 

 

[etawreed]

I do the same what u say but here is the result :

[etawreed]

thank u the problem solved

[Lakshmi Natarajan]

Hi Etawreed, 

 

Thank you for the update. 

 

We are glad that the reported issue has been resolved at your side. Please let us know if you need further assistance. As always we are happy to help you out. 

 

Regards, 

Lakshmi Natarajan