Develop Reference

Displaying a form in a window panel in WPF application

So I am created a window with a space to display and show each form, depending on which button click, the issue is I cant seem to find any solution on how to have the form open in the specific window or in the panel of that specific window.
Is this even possible?
My Window design code is as follow:
Title="winHomeDash" Height="650" Width="950"
WindowStartupLocation="CenterScreen"
WindowStyle="None"
AllowsTransparency="True"
materialDesign:ThemeAssist.Theme="Dark"
Background="{x:Null}" Loaded="BtnMenuShort_Click">
<materialDesign:Card UniformCornerRadius="15" Margin="25" Width="900" Height="600" Background="{DynamicResource ResourceKey=MaterialDesignDarkBackground}">
<materialDesign:Card UniformCornerRadius="15" HorizontalAlignment="Left" Width="225" Background="#0A1828">
<DockPanel Width="225" Height="600">
<StackPanel Height="155" VerticalAlignment="Top" Width="225">
<Image Height="50" Width="50" Margin="0 15 0 15" Source="/UserPic.png"/>
<Label Name="lblName" BorderThickness="0" FontFamily="Arial" FontWeight="Bold" FontSize="17" Margin="0 0 0 5" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Foreground="#FF2372FA" Height="24" Loaded="Window_Loaded"/>
<Label x:Name="lblDateTime" Content="" FontFamily="Arial" FontWeight="SemiBold" FontSize="12" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Foreground="#FF2372FA" Margin="0 0 0 18" Height="22" Width="225" Loaded="LblDateTime_Loaded"/>
<Rectangle Name="rec1" Height="7" Fill="#FF2372FA"/>
</StackPanel>
<materialDesign:Card Name="card2" Width="210" UniformCornerRadius="15" Height="445" Background="{DynamicResource ResourceKey=MaterialDesignDarkBackground}" Foreground="White" Margin="-210,155,0,0">
<StackPanel VerticalAlignment="Center" Height="445" Name="stpnlMenu">
<Button x:Name="btnCollapse" Width="15" Height="30" BorderBrush="{x:Null}" Foreground="{x:Null}" FlowDirection="RightToLeft" Margin="195,207.5,0,0" Click="BtnMenuShort_Click">
<Button.Background>
<ImageBrush ImageSource="/more_than_25px.png"/>
</Button.Background>
</Button>
<Button x:Name="btnMenu" Content="MENU" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-227.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" Click="BtnMenuShort_Click" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnHome" Content="HOME" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-187.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnFuel" Content="FUEL" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-147.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu" Click="BtnFuel_Click"/>
<Button x:Name="btnTyres" Content="TYRES" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-122.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnService" Content="SERVICE" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-97.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnBags" Content="WASTE BAGS" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,-72.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnExpand" Width="15" Height="30" BorderBrush="{x:Null}" Foreground="{x:Null}" FlowDirection="LeftToRight" Margin="25,-30,0,0" Click="BtnMenuShort_Click" Visibility="Hidden">
<Button.Background>
<ImageBrush ImageSource="/more_than_25px.png"/>
</Button.Background>
</Button>
<Button x:Name="btnChat" Content="QUICK CHAT" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,122.5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnHelp" Content="SUPPORT" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,5,0,0" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
<Button x:Name="btnLogOut" Content="LOG OUT" HorizontalContentAlignment="Left" Width="160" Height="20" Margin="0,5,0,20" FontFamily="Arial" FontSize="10" FontWeight="SemiBold" Background="{x:Null}" BorderBrush="{x:Null}" RenderTransformOrigin="-0.836,17.714" Click="BtnLogOut_Click" VerticalAlignment="Top" Cursor="Hand" Tag="tagMenu"/>
</StackPanel>
</materialDesign:Card>
<StackPanel Width="30" Height="445" Margin="-400,155,0,0" Background="#0A1828">
<Rectangle Name="rec2" Height="10"/>
<Button Name="btnMenuShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Click="BtnMenuShort_Click" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/menu_30px.png" Stretch="Uniform"/>
</Button.Background>
</Button>
<Rectangle Name="rec3" Height="20"/>
<Button Name="btnHomeShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/home_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Rectangle Name="rec4" Height="20"/>
<Button Name="btnFuelShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand" Click="BtnFuel_Click">
<Button.Background>
<ImageBrush ImageSource="/gas_station_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Button Name="btnTyresShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/wheel_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Button Name="btnServiceShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/maintenance_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Button Name="btnBagsShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/waste_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Rectangle Name="rec5" Height="170"/>
<Button Name="btnChatShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/chat_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Button Name="btnHelpShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/help_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Button Name="btnLogOutShort" BorderBrush="{x:Null}" Foreground="{x:Null}" Height="20" Width="20" Margin="0,0,0,5" Click="BtnLogOut_Click" Cursor="Hand">
<Button.Background>
<ImageBrush ImageSource="/exit_sign_30px.png" Stretch="Fill"/>
</Button.Background>
</Button>
<Rectangle Name="rec6" Height="10"/>
</StackPanel>
<materialDesign:Clock Name="clClock" Width="675" Height="22" FontFamily="Arial" FontWeight="SemiBold" FontSize="10" Foreground="White" Margin="0,578,0,0"/>
<Grid Width="645" Height="550" Margin="0,25,25,25" Name="stackForms">
</Grid>
</DockPanel>
</materialDesign:Card>
</materialDesign:Card>
The place for the grid is where I want the form to be displayed.
The Window cs code is as follows:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Forms;
using System.Configuration;
using Application = System.Windows.Application;
namespace SolAquaPro
{
/// <summary>
/// Interaction logic for winHomeDash.xaml
/// </summary>
public partial class WinHomeDash : Window
{
public WinHomeDash()
{
InitializeComponent();
}
private void LblDateTime_Loaded(object sender, RoutedEventArgs e)
{
}
private void BtnLogOut_Click(object sender, RoutedEventArgs e)
{
this.Close();
Window main = new MainWindow();
main.Show();
}
public void BtnMenuShort_Click(object sender, RoutedEventArgs e)
{
if ((card2.Visibility == Visibility.Visible) && (btnCollapse.Visibility == Visibility.Visible))
{
card2.Width = 45;
card2.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
btnBags.Visibility = Visibility.Hidden;
btnChat.Visibility = Visibility.Hidden;
btnFuel.Visibility = Visibility.Hidden;
btnHome.Visibility = Visibility.Hidden;
btnMenu.Visibility = Visibility.Hidden;
btnLogOut.Visibility = Visibility.Hidden;
btnService.Visibility = Visibility.Hidden;
btnHelp.Visibility = Visibility.Hidden;
btnTyres.Visibility = Visibility.Hidden;
btnCollapse.Visibility = Visibility.Hidden;
btnExpand.Visibility = Visibility.Visible;
}
else
{
if ((card2.Visibility == Visibility.Visible) && (btnCollapse.Visibility == Visibility.Hidden))
{
card2.Width = 210;
card2.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
btnBags.Visibility = Visibility.Visible;
btnChat.Visibility = Visibility.Visible;
btnFuel.Visibility = Visibility.Visible;
btnHome.Visibility = Visibility.Visible;
btnMenu.Visibility = Visibility.Visible;
btnLogOut.Visibility = Visibility.Visible;
btnService.Visibility = Visibility.Visible;
btnHelp.Visibility = Visibility.Visible;
btnTyres.Visibility = Visibility.Visible;
btnCollapse.Visibility = Visibility.Visible;
btnExpand.Visibility = Visibility.Hidden;
}
}
}
public void Window_Loaded(object sender, RoutedEventArgs e)
{
lblName.Content = Application.Current.Resources["UserAssign"].ToString();
}
private void BtnFuel_Click(object sender, RoutedEventArgs e)
{
Form frmFuelDash = new FuelDash();
frmFuelDash.Show();
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
DragMove();
}
}
}
Thank you in advance

You could try to refer to the following code to see if it matches yours.
If you have any questions, please let me know.
Right-click the reference under the project and select Add Reference....
Check System.Windows.Forms and WindowsFormsIntegration and click OK.
Project structure:
MainWindow.xaml:
<DockPanel >
<Grid x:Name="grid" Background="LightYellow" Width="500" Height="400">
</Grid>
<StackPanel x:Name="sp1" Width="200" Height="100" Background="LightSkyBlue" >
<Button x:Name="btn1" Width="80" Height="30" Background="LightGray" Content="form1" Click="btn1_Click" />
<Button x:Name="btn2" Width="80" Height="30" Background="LightGray" Content="form2" Click="btn2_Click"/>
</StackPanel>
</DockPanel>
MainWindow.xaml.cs:
using System.Windows;
using System.Windows.Forms.Integration;
namespace WpfShowForm
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void btn1_Click(object sender, RoutedEventArgs e)
{
Form1 f1 = new Form1();
f1.TopLevel = false;
WindowsFormsHost host1 = new WindowsFormsHost();
host1.Child=f1;
grid.Children.Add(host1);
}
private void btn2_Click(object sender, RoutedEventArgs e)
{
Form2 f2 = new Form2();
f2.TopLevel = false;
WindowsFormsHost host2 = new WindowsFormsHost();
host2.Child = f2;
grid.Children.Add(host2);
}
}
}
Add button in Form1:
private void button1_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
f2.Show();
}
The Result:

Mahapps : ScrollViewer update list on event KeyDown in WPF ( C # )

I have a problem I can not solve.
As you can see in the picture , there is a label , a textobx and a ScrollViewer .
Now , I have to update the ScrollViewer when the user searches through the textbox .
Part of an event every time you make a keydown .
So if I write Statut ... should put first in the file list with the names "statuto rai"
the list can have N elements
Image list:
Xaml code:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="25"></RowDefinition>
<RowDefinition Height="25"></RowDefinition>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Background="GhostWhite"/>
<Grid Grid.Row="1" Background="Gray"/>
<TextBlock HorizontalAlignment="Center" VerticalAlignment="Center">Documenti allegati</TextBlock>
<Border Grid.Row="1" Margin="3" BorderBrush="White" Height="22" Background="#fff">
<TextBox BorderBrush="#465E76" KeyDown="TextBox_KeyDown" BorderThickness="0" FontSize="10" Background="#fff" Foreground="#565656" controls:TextBoxHelper.Watermark="Ricerca Locale" FontFamily="{StaticResource Lato Thin}" HorizontalContentAlignment="Center" ></TextBox>
</Border>
<ScrollViewer Grid.Row="2" VerticalScrollBarVisibility="Hidden" PanningMode="Both" Name="scrollDocuments">
<ItemsControl ItemsSource="{Binding Path=attachmentsList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Grid.Column="0" Grid.Row="0">
<Button Grid.ColumnSpan="2">
<Button.Template>
<ControlTemplate TargetType="{x:Type Button}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="450"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="60"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Background="#fff"></Grid>
<TextBlock Foreground="#565656" FontFamily="{StaticResource Lato Semibold}" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" FontSize="10" Margin="10,3,0,0" Style="{DynamicResource Lato-Semibold}" Text="{Binding contList}"/>
<Image Source="/Resources/Images/icon-document-browser.png" HorizontalAlignment="Left" Margin="22,-12,0,0" Width="22"/>
<TextBlock Foreground="#565656" FontFamily="{StaticResource Lato Semibold}" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" FontSize="10" Margin="21,32,0,0" Style="{DynamicResource Lato-Semibold}" Text="{Binding FileSizeConverted}"/>
<TextBlock Foreground="#565656" FontFamily="{StaticResource Lato Semibold}" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" FontSize="12" Margin="55,-10,0,0" Style="{DynamicResource Lato-Semibold}" Text="{Binding Name}"/>
<TextBlock Foreground="#565656" FontFamily="{StaticResource Lato Semibold}" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Right" VerticalAlignment="Center" FontSize="12" Margin="55,-10,10,0" Style="{DynamicResource Lato-Semibold}" Text="{Binding ModifiedDate}"/>
<TextBlock Foreground="#565656" FontFamily="{StaticResource Lato Semibold}" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Right" VerticalAlignment="Center" FontSize="10" Margin="55,25,10,0" FontWeight="Bold" Style="{DynamicResource Lato-Semibold}" Text="Nessuna copia locale"/>
<Border Grid.Row="0" Grid.ColumnSpan="2" BorderBrush="#DDD" BorderThickness="0,0,0,1"></Border>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
<Viewbox Grid.Row="2" Name="testoNessunAllegato" Visibility="Collapsed" Margin="20">
<TextBlock Text="Nessun allegato disponibile."></TextBlock>
</Viewbox>
</Grid>
CodeBehind event code:
private void TextBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
string find = ((TextBox)sender).Text;
attachmentsList = attachmentsList.Where(x => x.Name == find).ToList();
InitializeComponent();
}
in practice I do the intelligiente research, so every time I insert a letter filtrale list , and print it again , of course real time .
I hope I explained myself .
Thank you

I see you use bindings, in this case there is a much better stuff to reach your goal. It's CollectionView.
Here is a simple app for you which more or less fullfill your requirements:
View
<StackPanel Orientation="Horizontal">
<Label Content="Search" />
<TextBox MinWidth="30" Text="{Binding FilterText, UpdateSourceTrigger=PropertyChanged}" />
</StackPanel>
<ListBox ItemsSource="{Binding Data}" />
UpdateSorceTrigger=PropertyChanges updates FilterText in ViewModel every time when you press any key.
Data is a ICollectionView
ViewModel
public ICollectionView Data { get; private set; }
...
// Create default view for the list
Data = CollectionViewSource.GetDefaultView(list);
// Set filter delegate for CollectionView
Data.Filter = FilterData;
....
private bool FilterData(object obj)
{
DataContainer cont = (DataContainer)obj;
return string.IsNullOrEmpty(FilterText) || cont.Name.StartsWith(FilterText, StringComparison.OrdinalIgnoreCase);
}
private string myfiltertext;
public string FilterText
{
get { return myfiltertext; }
set
{
myfiltertext = value;
// Refresh collection view after Filter text modification
Data.Refresh();
}
}

Windows Phone App Crashes on ListPicker Selected Item

My (first) Windows Phone app keeps crashing when the code takes the selection from a ListPicker, and a webbrowser navigates to that selection. It builds without errors, but crashed when I run it and press the button. I am a beginner when it comes to coding, so please dumb-down your answers :)
Heres my code:
XAML:
<phone:PhoneApplicationPage
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
x:Class="SecurityCamera.Page1"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
mc:Ignorable="d"
shell:SystemTray.IsVisible="True">
<phone:PhoneApplicationPage.Resources>
<DataTemplate x:Name="ListPickerItemTemplate">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" Margin="10 0 0 0"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Name="ListPickerFullModeItemTemplate">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" Margin="10 0 0 0"/>
</StackPanel>
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="Security Camera Access" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="Specify IP" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Margin="12,138,12,0" Grid.RowSpan="2" Opacity="0.99">
<TextBox x:Name="box1" HorizontalAlignment="Left" Height="70" Margin="31,172,0,0" TextWrapping="Wrap" Text="Http://" VerticalAlignment="Top" Width="400"/>
<TextBox x:Name="box2" HorizontalAlignment="Left" Height="70" Margin="31,242,0,0" TextWrapping="Wrap" Text="Http://" VerticalAlignment="Top" Width="400"/>
<TextBox x:Name="box3" HorizontalAlignment="Left" Height="70" Margin="31,312,0,0" TextWrapping="Wrap" Text="Http://" VerticalAlignment="Top" Width="400"/>
<TextBox x:Name="box4" HorizontalAlignment="Left" Height="70" Margin="31,382,0,0" TextWrapping="Wrap" Text="Http://" VerticalAlignment="Top" Width="400"/>
<Button Content="Connect" HorizontalAlignment="Left" Height="80" Margin="84,527,0,0" VerticalAlignment="Top" Width="305" Click="Button_Click_1"/>
<Button Content="Save" HorizontalAlignment="Left" Height="80" Margin="84,457,0,0" VerticalAlignment="Top" Width="305" Click="Button_Click_2"/>
<TextBlock HorizontalAlignment="Left" Margin="10,119,0,0" TextWrapping="Wrap" Text="Write IP's below to save - Include http:// before all addresses!" VerticalAlignment="Top"/>
</Grid>
<toolkit:ListPicker x:Name="defaultPicker" SelectionChanged="OnListPickerChanged" ExpansionMode="FullScreenOnly" Header="Saved IP's:" Margin="72,0,72,489" Grid.Row="1"/>
<phone:WebBrowser x:Name="webBrowser" HorizontalAlignment="Left" Margin="12,143,0,0" VerticalAlignment="Top" Width="456" Grid.RowSpan="2" Height="615" Opacity="100" Visibility="Visible"/>
</Grid>
</phone:PhoneApplicationPage>
XAML.CS:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.Xml;
using System.IO.IsolatedStorage;
using System.IO;
namespace SecurityCamera
{
public partial class Page1 : PhoneApplicationPage
{
public Page1()
{
InitializeComponent();
defaultPicker.ItemsSource = new List<string>() { { box1.Text }, { box2.Text }, { box3.Text }, { box4.Text } };
webBrowser.Visibility = System.Windows.Visibility.Collapsed;
// DEBUG MESSAGE - DELETE
MessageBox.Show("Visibility set to Collapsed (startup)");
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
------------------------THIS IS WHERE IT CRASHES --------------------------
//DEBUG MESSAGE - DELETE
MessageBox.Show("Button Pressed!");
string selectedItem;
selectedItem = (sender as ListPicker).SelectedItem.ToString();
// Do what you want with selectedItem
webBrowser.Navigate(new Uri(selectedItem));
//DEBUG MESSAGE - DELETE
MessageBox.Show("webBrowser.Navigate Executed...Making Visible");
webBrowser.Visibility = System.Windows.Visibility.Visible;
// DEBUG MESSAGE - DELETE
MessageBox.Show("webBrowser navigation sent - webBrowser Visibility set to Visible - Button Press");
}
private void OnListPickerChanged(object sender, SelectionChangedEventArgs e)
{
string selectedItem;
selectedItem = (sender as ListPicker).SelectedItem.ToString();
// Do what you want with selectedItem
// webBrowser.Navigate(new Uri(selectedItem));
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
defaultPicker.ItemsSource = new List<string>() { { box1.Text }, { box2.Text }, { box3.Text }, { box4.Text } };
// Write Text's into param
IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
//create new file
using (StreamWriter writeFile = new StreamWriter(new IsolatedStorageFileStream("ip1.txt", FileMode.Create, FileAccess.Write, myIsolatedStorage)))
{
string someTextData = "{ box1.Text }";
writeFile.WriteLine(someTextData);
writeFile.Close();
}
}
}
}

I believe this cast is failing:
selectedItem = (sender as ListPicker).SelectedItem.ToString();
instead try:
selectedItem = defaultPicker.SelectedItem.ToString();

NullReferenceException while adding item to ObservableCollection

I am trying to add an object to an ObservableCollection. As mentioned in a few question on this very site, I even tried to instantiate the collection before adding item. However, I am still getting the error. Here is my observation collection:
//Datacontext for local database
private WordDataContext wordsDB;
//Observable collection for binding
private ObservableCollection<WordItem> _wordItems = new ObservableCollection<WordItem>();
public ObservableCollection<WordItem> WordItems
{
get
{
return _wordItems;
}
set
{
if (_wordItems != value)
{
_wordItems = value;
NotifyPropertyChanged("WordItems");
}
}
}
I have overridden onNavigatedTo
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
// Define the query to gather all of the idea items.
var wordItemsInDB = from WordItem word in wordsDB.WordItems
select word;
// Execute the query and place the results into a collection.
WordItems = new ObservableCollection<WordItem>(wordItemsInDB);
// Call the base method.
base.OnNavigatedTo(e);
}
And here is the button to add new item
private void newIdeaAddButton_Click(object sender, RoutedEventArgs e)
{
//// Create a new idea item based on the text box.
//WordItem newIdea = new WordItem { WordName = "TestTest" };
//Debug.WriteLine("I'm here!");
//// Add a idea item to the observable collection.
//WordItems.Add(newIdea);
//// Add a idea item to the local database.
//wordsDB.WordItems.InsertOnSubmit(newIdea);
WordItem newword = new WordItem { WordName = "Bingo" };
if (WordItems == null)
{
Debug.WriteLine("I'm null!");
WordItems = new ObservableCollection<WordItem>();
}
WordItems.Add(newword);
wordsDB.WordItems.InsertOnSubmit(newword);
Debug.WriteLine("Did something!");
}
And here's the XAML
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<!--<ListBox Margin="14,0,-12,0" FontSize="{StaticResource PhoneFontSizeExtraLarge}" FontFamily="{StaticResource PhoneFontFamilySemiLight}">
<ListBoxItem Content="About" Tap="GoToAbout"/>
</ListBox>-->
<telerikData:RadJumpList x:Name="TestList" IsStickyHeaderEnabled="True" Margin="14,0,-12,0" ItemsSource="{Binding WordItems}">
<telerikData:RadJumpList.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Height="74">
<Rectangle x:Name="Bully" Width="20" Fill="Gray" Height="62" VerticalAlignment="Top" HorizontalAlignment="Left" />
<TextBlock Style="{StaticResource PhoneTextExtraLargeStyle}" Text="{Binding WordItem}" VerticalAlignment="Top"/>
</StackPanel>
</DataTemplate>
</telerikData:RadJumpList.ItemTemplate>
<telerikData:RadJumpList.StickyHeaderTemplate>
<DataTemplate>
<Border HorizontalAlignment="Stretch" Background="{StaticResource PhoneBackgroundBrush}" Height="74">
<Border Background="{StaticResource PhoneAccentBrush}" VerticalAlignment="Top" HorizontalAlignment="Left" Width="62" Height="62">
<TextBlock Text="{Binding}" FontFamily="{StaticResource PhoneFontFamilySemiLight}" FontSize="{StaticResource PhoneFontSizeExtraLarge}" Padding="7,0,0,0" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</Border>
</DataTemplate>
</telerikData:RadJumpList.StickyHeaderTemplate>
<telerikData:RadJumpList.GroupHeaderTemplate>
<DataTemplate>
<Border HorizontalAlignment="Stretch" Background="{StaticResource PhoneBackgroundBrush}" Height="74">
<Border Background="{StaticResource PhoneAccentBrush}" VerticalAlignment="Top" HorizontalAlignment="Left" Width="62" Height="62">
<TextBlock Text="{Binding}" FontFamily="{StaticResource PhoneFontFamilySemiLight}" FontSize="{StaticResource PhoneFontSizeExtraLarge}" Padding="7,0,0,0" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</Border>
</DataTemplate>
</telerikData:RadJumpList.GroupHeaderTemplate>
<telerikData:RadJumpList.GroupPickerItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel HorizontalAlignment="Center" ItemHeight="111" ItemWidth="111"/>
</ItemsPanelTemplate>
</telerikData:RadJumpList.GroupPickerItemsPanel>
<telerikData:RadJumpList.GroupPickerItemTemplate>
<DataTemplate>
<Border Background="{StaticResource PhoneAccentBrush}" Width="99" Height="99" VerticalAlignment="Top" HorizontalAlignment="Left">
<TextBlock Text="{Binding}" Style="{StaticResource PhoneTextExtraLargeStyle}" VerticalAlignment="Bottom" Foreground="White" />
</Border>
</DataTemplate>
</telerikData:RadJumpList.GroupPickerItemTemplate>
</telerikData:RadJumpList>
<Button x:Name="newIdeaAddButton" Click="newIdeaAddButton_Click" Content="Button" Height="72" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="160" />
</Grid>

Okay, I finally got the solution! The problem in itself is a bit obscure. The thing is that, earlier, I had RadJumplist bound to a List<strings> and it had GroupDescriptor defined accordingly
GenericGroupDescriptor<string, string> testgroup = new GenericGroupDescriptor<string, string>(listitem => listitem.Substring(0, 1).ToLower());
However, the scenario in question is about ObservableCollection<WordItem>. As soon as an item is added to the collection, the RadJumpList is notified about those changes and the GroupDescriptor proves to be invalid in that context. That somehow raises the NullReferenceException. It's a bit unintuitive to relate the error with the cause.
So, the simple solution was to change the descriptor as follows
GenericGroupDescriptor<WordItem, string> gengd = new GenericGroupDescriptor<WordItem, string>();
gengd.KeySelector = (WordItem item) =>
{
char keyhead = item.WordName[0];
return keyhead.ToString().ToLower();
};
This thing is not really well documented!

Problem with refreshing Data c#

My problem is first I'm downladin xml file from server like this:
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
//pobieranie danych z pliku xml znajdujacego sie na serwerze
WebClient client = new WebClient();
client.DownloadStringCompleted += HttpsCompleted;
client.DownloadStringAsync(new Uri("Myurl/baza.xml"));
}
private void HttpsCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XDocument xdoc3 = XDocument.Parse(e.Result, LoadOptions.None);
var data = from query in xdoc3.Descendants("Item")
select new Item
{
name = (string)query.Element("name"),
prise = (int)query.Element("prise"),
howmany = (int)query.Element("howmany")
};
items_listBox.ItemsSource = data;
status_textBlock.Text = "Data ok";
}
else {
status_textBlock.Text = "Fail";
kup_button.Visibility = 0;
}
Then i'v made a refresh button, and add function to it, basicly the same code:
private void button1_Click(object sendera, RoutedEventArgs a)
{
WebClient client2 = new WebClient();
client2.DownloadStringCompleted += HttpsCompleteda;
client2.DownloadStringAsync(new Uri(Myurl/baza.xml"));
}
private void HttpsCompleteda(object sendera, DownloadStringCompletedEventArgs a)
{
#region server_ok
if (a.Error == null
{
#region refresh
XDocument xdoca = XDocument.Parse(a.Result, LoadOptions.None);
var new_data = from query in xdoca.Descendants("Item")
select new Item
{
name = (string)query.Element("name"),
prise = (int)query.Element("prise"),
howmany = (int)query.Element("howmany")
};
items_listBox.ItemsSource = new_data;
}
After laod first xml, it (xml file) is chenged(i can see via my web browser) but when i refresh it looks steel the same in
items_listBox.ItemsSource
any ideas? thanks for help
xaml code
x:Class="Sklep.Page1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="Sklep" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="Sklep" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}" Height="49" Width="456" FontSize="30" />
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<Button Content="zamow" Height="70" HorizontalAlignment="Left" Margin="-12,474,0,0" Name="kup_button" VerticalAlignment="Top" Width="480" Click="kup_button_Click" />
<TextBlock HorizontalAlignment="Left" Margin="230,550,0,74" Name="textBlock1" Text="Ilość sztuk" Width="190" />
<TextBox Height="57" HorizontalAlignment="Left" Margin="0,536,0,0" Name="order_textBox" Text="1" VerticalAlignment="Top" Width="224" TextAlignment="Right" FontSize="18" />
<CheckBox Content="zapłacone" Height="86" HorizontalAlignment="Left" Margin="171,568,0,0" Name="pay_box" VerticalAlignment="Top" Width="261" />
<ListBox x:Name="items_listBox" MinHeight="200" MinWidth="300" Margin="6,62,6,174" MaxHeight="500">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="10" >
<TextBlock Text="{Binding name}"/>
<TextBlock Text="{Binding prise}"/>
<TextBlock Text="{Binding howmany}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<TextBlock Height="53" HorizontalAlignment="Left" Margin="1,3,0,0" Name="status_textBlock" Text="" VerticalAlignment="Top" Width="449" TextAlignment="Center" />
<Button Content="Odswież" Height="103" HorizontalAlignment="Left" Margin="339,545,0,0" Name="button1" VerticalAlignment="Top" Width="114" FontSize="15" Click="button1_Click" />
</Grid>
</Grid>

The request will be cached by the WebClient.
The easiest solution is to make the request look like a different one by adding something unique to the query string.
client.DownloadStringAsync(new Uri("Myurl/baza.xml?rand=" + Guid.NewGuid()));

Your problem seems more to be a data binding problem than about a web service call. You should give your XAML code.

I've solved it using
static public WebClient public_webclient