Develop Reference

Xamarin Forms Collectionview not updating when observable collection is updated

I have been stuck with this issue for quite sometime now. It might be quite simple for you guys.
I have a collection view which has its item source that shows an observable collection. It shows messages from users when the app starts and then as a new message comes, I want to add the new message as the 1st element in the collectionview but it gets distorted and removes the prior items (only from the UI and not the actual observable collection data) and only shows 1 item. And when I navigate to other page and come back it shows correctly. Could someone please help me with this.
Xaml
<CollectionView Grid.Row="1" x:Name="myMessagesCV" SelectionMode="Single" SelectionChanged="MyMessagesCV_SelectionChanged" RemainingItemsThresholdReached="MyMessagesCV_RemainingItemsThresholdReached" RemainingItemsThreshold="5">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout Padding="8, 8, 8, 0">
<Grid Padding="0" ColumnSpacing="0" RowSpacing="0" Margin="2">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="75"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ffimageloading:CachedImage x:Name="userImage" Source="{Binding userImage}" Aspect="AspectFill" HeightRequest="75" Grid.Row="0" Grid.Column="0" CacheType="All" DownsampleToViewSize="True">
<ffimageloading:CachedImage.Transformations>
<transformations:CircleTransformation/>
</ffimageloading:CachedImage.Transformations>
</ffimageloading:CachedImage>
<Grid Grid.Row="0" Grid.Column="1" Padding="5">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Label Padding="10, 0, 0, 5" Text="{Binding userName}" LineBreakMode="TailTruncation" TextColor="Black" FontSize="Medium" Grid.Row="0" Grid.Column="0"/>
<Label Padding="10, 0, 0, 5" Text="{Binding message}" FontAttributes="{Binding newMessage}" FontSize="Small" TextColor="Black" Grid.Row="1" Grid.Column="0" HorizontalOptions="StartAndExpand" />
<Image Grid.Row="0" Grid.Column="1" Grid.RowSpan="2" Source="dot.png" Aspect="AspectFill" WidthRequest="10" IsVisible="{Binding IsNewMessage}" HorizontalOptions="Center" VerticalOptions="Center"/>
</Grid>
<BoxView BackgroundColor="LightGray" HeightRequest="1" Grid.Row="1" Grid.Column="1"/>
</Grid>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
Code Behind Page
public ObservableCollection<Messages> MyMessagesList = new ObservableCollection<Messages>();
public async void GetMyMessages()
{
if (IsBusy)
return;
IsBusy = true;
var messages = await FirebaseDataHelper.GetMyMessages(uid);
var allmyMessages = await Task.WhenAll(FirebaseDataHelper.GetUserMessagesDetail(messages));
myunreadmsg = 0;
allmyMessagesCount = messages.Count;
IsSubscribe = false;
foreach (var message in allmyMessages)
{
if (message.Count > 0)
{
for (int i = 0; i < message.Count; i++)
{
if (message[i].status == "Delivered" && message[i].senderId != uid)
{
message[i].newMessage = FontAttributes.Bold;
message[i].IsNewMessage = true;
myunreadmsg++;
}
if (!MyMessagesList.Any(m => m.otheruserId == message[i].otheruserId) && message[i].message != null)
MyMessagesList.Add(message[i]);
}
}
}
myMessagesCV.ItemsSource = MyMessagesList;
}
public void GetMyNewMessages(Messages messageData)
{
IsSubscribe = false;
myunreadmsg = 0;
Messages newMessageData = new Messages();
if (messageData.status == "Delivered" && messageData.senderId != uid)
{
newMessageData.newMessage = FontAttributes.Bold;
newMessageData.IsNewMessage = true;
newMessageData.otheruserId = messageData.otheruserId;
newMessageData.senderId = messageData.senderId;
newMessageData.sellerId = messageData.sellerId;
myunreadmsg++;
}
else
{
newMessageData.newMessage = FontAttributes.None;
}
for (int i = 0; i < MyMessagesList.Count; i++)
{
if (MyMessagesList[i].otheruserId == messageData.otheruserId)
{
if (i == 0)
{
MyMessagesList[i].message = messageData.message;
if (myunreadmsg > 0)
{
MyMessagesList[i].IsNewMessage = true;
MyMessagesList[i].newMessage = FontAttributes.Bold;
}
break;
}
else
{
newMessageData.userName = MyMessagesList[i].userName;
newMessageData.userImage = MyMessagesList[i].userImage;
newMessageData.message = messageData.message;
newMessageData.time = messageData.time;
newMessageData.messageId = messageData.messageId;
MyMessagesList.Remove(MyMessagesList[i]);
MyMessagesList.Insert(0, newMessageData);
break;
}
}
}
myMessagesCV.ItemsSource = MyMessagesList;
}
Thank you guys. Hope I can solve this.

When your new message arrives, don't set ItemSource again like you do it in your GetMyNewMessages method:
myMessagesCV.ItemsSource = MyMessagesList;
Just insert your new message into MyMessagesList ObservableCollection.
MyMessagesList.Insert(0, newMessageData);
I made a simple project where it is demonstrated.
Here is xaml:
<ContentPage
x:Class="Search.MainPage"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
BackgroundColor="White">
<Grid Margin="15">
<CollectionView
x:Name="CollectionView"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand">
<CollectionView.ItemTemplate>
<DataTemplate>
<Label Text="{Binding}" TextColor="Red" />
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</Grid>
</ContentPage>
And here is code behind of this page:
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
}
public ObservableCollection<int> Data { get; set; } = new ObservableCollection<int>(Enumerable.Range(1, 10));
protected override void OnAppearing()
{
base.OnAppearing();
Device.StartTimer(TimeSpan.FromSeconds(3), () =>
{
Data.Insert(0, new Random().Next(1, 1000));
return true;
});
CollectionView.ItemsSource = Data;
}
}

How to display items from different types in a Table in Xamarin Forms

Desired Result :
I have a list of objects that contains the Title of every section in the menu and in this list I have the list of images and other information
I've been strugeling on how to display them properly
my xaml :
<ContentPage.Content>
<TableView Intent="Form">
<TableRoot>
<TableSection Title="Getting Started">
<ViewCell>
<Grid VerticalOptions="FillAndExpand" Padding = "20, 0" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" ></RowDefinition>
<RowDefinition Height="Auto" ></RowDefinition>
</Grid.RowDefinitions>
<StackLayout Grid.Row="0" x:Name="Titre" Orientation="Horizontal">
</StackLayout>
<ScrollView Grid.Row="1">
<StackLayout
Padding="0"
x:Name="Image">
</StackLayout>
</ScrollView>
</Grid>
</ViewCell>
</TableSection>
</TableRoot>
</TableView>
</ContentPage.Content>
The C# Method :
private void PopulateProductsLists(List<PlanDefinition> listArticles)
{
for (var i = 0; i < listArticles.Count; i++)
{
//Display Title
Titre.Children.Add((new Label { Text = listArticles[i].Name, Style = Device.Styles.TitleStyle, FontAttributes = FontAttributes.Bold, TextColor = Color.White }));
//Display Images from listArticles[i].ArticlesAvailable
for (int j= 0; j < listArticles[i].ArticlesAvailable.Count; j++)
{
listArticles[i].ArticlesAvailable[j].ImageProduit = "https://fit-plans.com/" + listArticles[i].ArticlesAvailable[j].UrlSmallImage;
Image image = new Image();
image.Source = ImageSource.FromUri(new Uri(listArticles[i].ArticlesAvailable[j].ImageProduit));
Image.Children.Add(image);
}
What I am droing wrong?

First of all here were my mistakes :
1- Not using a scrollable view
2- Using different stack layouts
The remedy to my issue :
<!----Scrollable view MUST be used otherwide data simply won't appear --->
<ScrollView
Grid.Column="0"
Grid.Row="1">
<Grid
RowSpacing="3"
x:Name="MyGrid"
ClassId="myGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<StackLayout VerticalOptions="FillAndExpand"
HorizontalOptions="FillAndExpand"
x:Name="ProduitsLayout">
<!----Products will be displayed here --->
</StackLayout>
</Grid>
</ScrollView>
And in the code behind :
private void PopulateProductsLists(List<PlanDefinition> listArticles)
{
int labelIndex = 0;
int count = 0;
for (var i = 0; i < listArticles.Count; i++)
{
//Calling a view to display data
item = new PlanOrderTemplate();
var lastHeight = "100";
var y = 0;
int column = 1;
var productTapGestureRecognizer = new TapGestureRecognizer();
//Add label in the stack layout
ProduitsLayout.Children.Add((new Label
{
Text = listArticles[i].Name,
Style = Device.Styles.TitleStyle,
FontAttributes = FontAttributes.Bold,
TextColor = Color.Black
}));
for (int j = 0; j < listArticles[i].ArticlesAvailable.Count; j++)
{
productTapGestureRecognizer.Tapped += OnProductTapped;
item = new PlanOrderTemplate();
listArticles[i].ArticlesAvailable[j].ThumbnailHeight = lastHeight;
//Applying binding to the view in order to display data
item.BindingContext = listArticles[i].ArticlesAvailable[j];
item.GestureRecognizers.Add(productTapGestureRecognizer);
//This is mandatory you need to call the add the view page to the stack layout
ProduitsLayout.Children.Add(item);
}
}
}
Now as for the view page I'm talking about : ProduitsLayout.xaml
Configure the image I want to load with a stepper
<StackLayout Orientation="Vertical"
Spacing="1">
<ffimageloading:CachedImage
FadeAnimationEnabled="true"
Source="{Binding ImageProduit}"
HeightRequest="{Binding ThumbnailHeight}"
Aspect="AspectFill"/>
<Label x:Name="lbldisp" Text="1" VerticalOptions="Center" HorizontalOptions="Center"></Label>
<Stepper Minimum="0" Maximum="10" Increment="1" HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand" ValueChanged="OnValueChanged" />
</StackLayout>

2nd Legend canvas not showing in wpf chart

I've been struggling with this for some time now. The problem relates to adding a second legend canvas in a wpf chart. I'm referencing Jack Yu's book Practical WPF Charts and Graphics LineChartWithLegend.xaml file. In the xaml file, I added the new legend canvas named "legendCanvas2". I've changed the code behind to add a second instance of the legend in the AddChart() method. The problem is the second legend does not show inside chartCanvas. I suspect this issue has to do with multiple canvas containers inside chartCanvas but not sure. Any help with alternative ways I can display two legends inside chartCanvas would be appreciated.
XAML
<Window x:Class="LineCharts.LineChartWithLegend"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Line Chart with Legend" Height="400" Width="500">
<Grid Name="grid1" Margin="10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Name="column1" Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Name="row1" Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TextBlock Margin="2" x:Name="tbTitle" Grid.Column="1" Grid.Row="0"
RenderTransformOrigin="0.5,0.5" FontSize="14" FontWeight="Bold"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch" TextAlignment="Center"
Text="Title"/>
<TextBlock Margin="2" x:Name="tbXLabel" Grid.Column="1" Grid.Row="2"
RenderTransformOrigin="0.5,0.5" TextAlignment="Center"
Text="X Axis"/>
<TextBlock Margin="2" Name="tbYLabel" Grid.Column="0" Grid.Row="1"
RenderTransformOrigin="0.5,0.5" TextAlignment="Center"
Text="Y Axis">
<TextBlock.LayoutTransform>
<RotateTransform Angle="-90"/>
</TextBlock.LayoutTransform>
</TextBlock>
<Grid Margin="0" x:Name ="chartGrid" Grid.Column="1" Grid.Row="1"
ClipToBounds="True" Background="Transparent" SizeChanged="chartGrid_SizeChanged" />
<Canvas Margin="2" Name="textCanvas" ClipToBounds="True" Grid.Column="1" Grid.Row="1">
<Canvas Name="chartCanvas" ClipToBounds="True">
<Canvas Name="legendCanvas" Background="Transparent" />
<Canvas Name="legendCanvas2" Background="Transparent" />
</Canvas>
</Canvas>
</Grid>
</Window>
Code-Behind
private void AddChart()
{
cs = new ChartStyleGridlines();
lg = new Legend();
lg2 = new Legend();
dc = new DataCollection();
ds = new DataSeries();
cs.ChartCanvas = chartCanvas;
cs.TextCanvas = textCanvas;
cs.Title = "Sine and Cosine Chart";
cs.Xmin = 0;
cs.Xmax = 7;
cs.Ymin = -1.5;
cs.Ymax = 1.5;
cs.YTick = 0.5;
cs.GridlinePattern = ChartStyleGridlines.GridlinePatternEnum.Dot;
cs.GridlineColor = Brushes.Black;
cs.AddChartStyle(tbTitle, tbXLabel, tbYLabel);
// Draw Sine curve:
ds.LineColor = Brushes.Blue;
ds.LineThickness = 1;
ds.SeriesName = "Sine";
for (int i = 0; i < 70; i++)
{
double x = i / 5.0;
double y = Math.Sin(x);
ds.LineSeries.Points.Add(new Point(x, y));
}
dc.DataList.Add(ds);
// Draw cosine curve:
ds = new DataSeries();
ds.LineColor = Brushes.Red;
ds.SeriesName = "Cosine";
ds.LinePattern = DataSeries.LinePatternEnum.DashDot;
ds.LineThickness = 2;
for (int i = 0; i < 70; i++)
{
double x = i / 5.0;
double y = Math.Cos(x);
ds.LineSeries.Points.Add(new Point(x, y));
}
dc.DataList.Add(ds);
// Draw sine^2 curve:
ds = new DataSeries();
ds.LineColor = Brushes.DarkGreen;
ds.SeriesName = "Sine^2";
ds.LinePattern = DataSeries.LinePatternEnum.Dot;
ds.LineThickness = 2;
for (int i = 0; i < 70; i++)
{
double x = i / 5.0;
double y = Math.Sin(x) * Math.Sin(x);
ds.LineSeries.Points.Add(new Point(x, y));
}
dc.DataList.Add(ds);
dc.AddLines(cs);
lg.LegendCanvas = legendCanvas;
lg.IsLegend = true;
lg.IsBorder = true;
lg.LegendPosition = Legend.LegendPositionEnum.NorthWest;
lg.AddLegend(cs.ChartCanvas, dc);
lg2 = new Legend();
lg2.LegendCanvas = legendCanvas2;
lg2.IsLegend = true;
lg2.IsBorder = true;
lg2.LegendPosition = Legend.LegendPositionEnum.NorthEast;
lg2.AddLegend(cs.ChartCanvas, dc);
}
private void chartGrid_SizeChanged(object sender, SizeChangedEventArgs e)
{
textCanvas.Width = chartGrid.ActualWidth;
textCanvas.Height = chartGrid.ActualHeight;
legendCanvas.Children.Clear();
legendCanvas2.Children.Clear();
chartCanvas.Children.RemoveRange(2, chartCanvas.Children.Count - 1); // changed index from 1 to 2
textCanvas.Children.RemoveRange(1, textCanvas.Children.Count - 1);
AddChart();
}

Grid or border not allowing drop

I have to do a drag and drop application listView to code-generated grid.
So I have done a test program and that works
here is the xaml
<Grid Margin="0,0,-61.6,0.4">
<ListView x:Name="lwOne" PreviewMouseLeftButtonDown="ListBox_PreviewMouseLeftButtonDown" Background="Bisque" Margin="16,65,340.2,22">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" Width="250" VerticalAlignment="Top"></WrapPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
<Grid Name="grdMain" Drop="Grid_Drop" Background="AliceBlue" AllowDrop="True" Margin="380,65,81.2,62"/>
Now I have to migrate all this to my real application Which looks like that
So from how the cursor looks like i can see that the drag and drop is not allowed on the grid but it is on the tiny border of each cell.
So the problem is not doing d&d but ALLOWING to it
here is the xaml. The source listView is lvAllowedPPtab2, the destination grid is grdPalletTab2
<TabItem Name="tabItem2" HorizontalAlignment="Center" Height="80" MouseLeftButtonUp="TabItem_MouseLeftButtonUp" FontSize="{StaticResource TOOLTIP_FONTSIZE}" IsSelected="false" >
<TabItem.Header>
<StackPanel>
<TextBlock Text="" FontSize="{StaticResource TAB_FONTSIZE}"/>
<TextBlock Name="tbTab2" Visibility="Hidden" FontSize="{StaticResource BUTTON_FONTSIZE}" />
</StackPanel>
</TabItem.Header>
<TabItem.Background>
<ImageBrush/>
</TabItem.Background>
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Border x:Name="Border1Tab2" BorderBrush="Gainsboro" BorderThickness="5" Width="200" Margin="10,10,10,10" >
<StackPanel Margin="-1.8,-0.8,2.2,1.4">
<ListBox x:Name="lbxPalletsTab2" Background="{x:Null}" BorderBrush="{x:Null}" Height="600" SelectionChanged="ListBox_SelectionChanged" Margin="12,10.2,8.4,10.4" />
</StackPanel>
</Border>
<Border x:Name="Border2Tab2" BorderBrush="Gainsboro" MinWidth="150" BorderThickness="5" Grid.Column="1" Margin="10,10,10,10">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="300px"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid HorizontalAlignment="Stretch" Grid.Column="0">
<Grid.RowDefinitions>
<RowDefinition Height="50px"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<TextBlock Name="tbkPPtab2" Grid.Row="0" FontSize="22" Background="{x:Null}" FontWeight="Black" Text="---" HorizontalAlignment="Center" VerticalAlignment="Bottom"></TextBlock>
<ListView x:Name="lvAllowedPPtab2" Grid.Row="1" FontSize="12" Background="{x:Null}" BorderBrush="Gainsboro" BorderThickness="5" Margin="10" VerticalAlignment="Stretch" PreviewMouseLeftButtonDown="ListBox_PreviewMouseLeftButtonDown">
<ListView.ItemsPanel >
<ItemsPanelTemplate >
<WrapPanel Orientation="Horizontal" Width="250" Background="{x:Null}" VerticalAlignment="Top"></WrapPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
</Grid>
<Border Grid.Column="1" BorderBrush="Gainsboro" BorderThickness="5" Margin="10,60,10,10">
<Grid Name="grdPalletTab2" AllowDrop="True" Drop="Grid_Drop"/>
</Border>
</Grid>
</Border>
</Grid>
</TabItem>
the grid is formed through
PalletWindow.PalletWindow.SetPalletGrid(numRows, numColumns,ref grdPalletTab2);
whose code is:
public static bool SetPalletGrid(int numRows, int numColumns, ref Grid grd)
{
try
{
grd.Children.Clear();
grd.RowDefinitions.Clear();
grd.ColumnDefinitions.Clear();
grd.AllowDrop = true;
for (int row = 0; row < numRows; row++)
{
var rd = new RowDefinition();
rd.AllowDrop = true;
rd.Height = new GridLength(1.0, GridUnitType.Star);
grd.RowDefinitions.Add(rd);
}
for (int column = 0; column < numColumns; column++)
{
var cd = new ColumnDefinition();
cd.AllowDrop = true;
cd.Width = new GridLength(1.0, GridUnitType.Star);
grd.ColumnDefinitions.Add(cd);
}
for (int row = 0; row < numRows; row++)
{
for (int column = 0; column < numColumns; column++)
{
var borderImage = new Border();
borderImage.AllowDrop = true;
borderImage.BorderThickness = new Thickness(2);
borderImage.BorderBrush = new SolidColorBrush(Colors.Black);
borderImage.Name = "BRD_" + row + "_" + column;
borderImage.Effect = new DropShadowEffect
{
Color = new Color { R = 255, G = 255, B = 255 },
Direction = 320,
ShadowDepth = 5,
Opacity = 0.95
};
Grid.SetRow(borderImage, row);
Grid.SetColumn(borderImage, column);
grd.Children.Add(borderImage);
}
}
return true;
}
catch// (Exception exc)
{
return false;
}
}
thanks for any help
Patrick

To make d&d work you have to set the background of the target element (don't know why). In your case set borderImage = new SolidColorBrush(Colors.Transparent);

How to find element in visual tree in wp7?

I need to find element in visual tree. For example I have a grid and I need to set my own text in tbox:WatermarkTextBox when ExpanderView expands.
xaml
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="280"/>
<ColumnDefinition Width="100"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.Column="0" >
<Border/>
</Grid>
<Grid Grid.Row="0" />
<Grid Grid.Row="0" Grid.Column="2" />
<toolkit:ExpanderView Expanded="setText" Collapsed="hideAppBar">
<Image Height="100" Margin="-53,0,0,0"/>
</toolkit:ExpanderView>
<toolkit:ExpanderView x:Name="expText" IsExpanded="False" Tag="{Binding}" Grid.Row="1" Grid.Column="1" VerticalContentAlignment="Stretch" Grid.ColumnSpan="2" Background="White" Foreground="Black" BorderBrush="White">
<tbox:WatermarkTextBox TextChanged="DisableOrEnable" TextWrapping="Wrap" AcceptsReturn="True" WatermarkText="Введите комментарий" BorderThickness="0" InputScope="Chat" Margin="-51,0,0,0" Padding="0" Background="White" BorderBrush="White"/>
</toolkit:ExpanderView>
...many elements
</Grid>
c#
public string message="my message";
private void setText(object sender, RoutedEventArgs e)
{
setMessage(((sender as ExpanderView).Parent as Grid));
}

Function that recursively searching through visual tree and set value to the element that you need:
public void setMessage(DependencyObject parent)
{
if (parent == null)
{
return;
}
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
DependencyObject child = VisualTreeHelper.GetChild(parent, i);
var frameworkElement = child as FrameworkElement;
if (frameworkElement != null && frameworkElement is WatermarkTextBox/*Type of element that you need*/)
{
(frameworkElement as WatermarkTextBox).Text = message;/*Value that you need*/
break;
}else
if (frameworkElement != null)
{
int CountInChildren = VisualTreeHelper.GetChildrenCount(frameworkElement);
for (int z = 0; z < CountInChildren; z++)
{
DependencyObject child1 = VisualTreeHelper.GetChild(frameworkElement, z);
setMessage(frameworkElement);
}
}
}
}