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UWP C# SQL Webservice GridView triggers

i have class created for data retrieval
I have XAML code with gridview and cs code which connects to SQL webservice and i can get data from SQL :-)
my gridview has
textblock - data from sql table
checkbox
textbox
I would like to have some actions on the checkbox and textboxes. How do I get my textboxes to become visible upon checkbox click?
I have got this code working in other apps without gridviews, but I can't get it to work here. how do I reference the event_handler inside the gridview
XAML example
<GridView x:Name="GreenQuestionGridView" ItemsSource="{Binding}" Background="Green" Margin="0,40,0,0">
<GridView.ItemTemplate>
<DataTemplate>
<Grid Height="40" Width="600" >
<StackPanel Orientation="Horizontal">
<TextBlock Width="200" VerticalAlignment="Bottom" TextWrapping="Wrap" Text="{Binding question_green}" />
<CheckBox x:Name="chkBox" Checked="chkBox_Checked" Unchecked="chkBox_Unchecked" Indeterminate="chkBox_Indeterminate" VerticalAlignment="Bottom" IsThreeState="True" />
<TextBox x:Name="txtBox" Visibility="Collapsed" Width="200" VerticalAlignment="Bottom" />
</StackPanel>
</Grid>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
here is code that works in other app, but this needs to reference the gridview
private void chkBox_Checked(object sender, RoutedEventArgs e)
{
if (chkbox.IsChecked == null)
{
txtbox.Visibility = Visibility.Visible;
}
else
{
txtbox.Visibility = Visibility.Collapsed;
}
}

For the CheckBox you need also the event CheckBox_Unchecked to hide it again.
<CheckBox Unchecked="CheckBox_Unchecked" Checked="CheckBox_Checked" ... />
IsChecked is a nullable type you didnt even checked if it's true. Your code will hide the txtbox so long as the IsChecked is not null.
private static void ToggleTextBoxVisibility(object sender) {
if(!(sender is CheckBox)) {
return;
}
CheckBox checkBox = sender as CheckBox;
foreach(var child in ((checkBox.Parent as StackPanel).Children)) {
if(!(child is TextBox)) {
continue;
}
TextBox textBox = child as TextBox;
if(checkBox.IsChecked.HasValue && checkBox.IsChecked.Value) {
textBox.Visibility = Visibility.Visible;
} else {
textBox.Visibility = Visibility.Collapsed;
}
}
}
private void CheckBox_Checked(object sender, RoutedEventArgs e) {
ToggleTextBoxVisibility(sender);
}
private void CheckBox_Unchecked(object sender, RoutedEventArgs e) {
ToggleTextBoxVisibility(sender);
}
A clean solution would be to control it with a binding to a property in your viewmodel.

Pass image in a new window in WPF/C#

I've got some images in a ListBox. When the user clicks one image, I'd like to open a new window (ImageWindow) and show the clicked image in the new window. I've added already a new XAML-file and a eventhandler. This is what I got:
MainWindow:
<ListBox Name="MainListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<DockPanel HorizontalAlignment="Center">
<Image Source="{Binding}" MouseDown="Image_MouseDown"></Image>
</DockPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
/*========================================================================*/
private void Image_MouseDown(object sender, MouseButtonEventArgs e)
{
ImageWindow imageWindow = new ImageWindow();
//Pass image
imageWindow.Show();
}
ImageWindow:
<ListBox Name="ImageListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<DockPanel HorizontalAlignment="Center">
<Image Source="{Binding}"></Image>
</DockPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
How do I pass the clicked image?
See example (click on the image)

Just copy, past and tune this code so it fits your varnames:
private void ListBox_MouseDoubleClick(object sender, MouseButtonEventArgs e) //Varname
{
ImageWindow imageWindow = new ImageWindow { Owner = this };
foreach (var item in ListBox.Items) //Varname
{
imageWindow.ListBox.Items.Add(item);//Varname
}
imageWindow.SetSelectedImageIndex = ListBox.SelectedIndex; //Varname + save the index of the selected item and pass it to ImageWindow
imageWindow.Show();
}
ImageWindow:
private void Window_Loaded(object sender, RoutedEventArgs e)
{
Application.Current.MainWindow.WindowState = WindowState.Normal;
ListBoxItem lbi = (ListBoxItem)ImageListBox.ItemContainerGenerator.ContainerFromIndex(SetSelectedImageIndex); //Get with the index the befor selected item
lbi.Focus(); //Set the focus on it
}

You can start with something like this:
<Grid
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions">
<Popup x:Name="popup" PlacementTarget="{Binding ElementName=imageList}">
<Image Source="{Binding PlacementTarget.SelectedItem , ElementName=popup}"/>
</Popup>
<ListView x:Name="imageList" >
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectionChanged">
<ei:ChangePropertyAction PropertyName="IsOpen"
TargetName="{Binding ElementName=popup}" Value="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</ListView>
</Grid>
Add references to Microsoft.Expression.Interactions and to System.Windows.Interactivity to get it work.

use of combobox to appear another combobox C#

I want to make this as, once i select the first item(Student Information) of the first_ComboBox want to appear second_ComboBox.
How can I make this happen
In the cs code
private void first_ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
private void second_ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
in XAML
<StackPanel Margin="97,47,171,499" Orientation="Horizontal" Grid.Row="1">
<TextBlock HorizontalAlignment="Left" TextWrapping="Wrap" Text="Where You want to Control" VerticalAlignment="Top" Height="82" Width="463" FontSize="36"/>
<ComboBox x:Name="first_ComboBox" HorizontalAlignment="Left" VerticalAlignment="Top" Width="560" Height="42" SelectionChanged="first_ComboBox_SelectionChanged">
<x:String>Student Information</x:String>
<x:String>Staff Information</x:String>
<x:String>Academic Information</x:String>
</ComboBox>
</StackPanel>
<StackPanel Margin="97,172,171,374" Orientation="Horizontal" Grid.Row="1">
<TextBlock HorizontalAlignment="Left" TextWrapping="Wrap" Text="Select the Field" VerticalAlignment="Top" Height="82" Width="463" FontSize="36"/>
<ComboBox x:Name="second_ComboBox" HorizontalAlignment="Left" VerticalAlignment="Top" Width="560" Height="42" SelectionChanged="second_ComboBox_SelectionChanged">
<x:String>Student Name</x:String>
<x:String>Student Address</x:String>
</ComboBox>
</StackPanel>

On your Form main, you can set the visibility of Second Combobox to be false, and then on the first combobox selection changed set it to true, Something like this
public MainWindow()
{
InitializeComponent();
second_ComboBox.Visibility = Visibility.Collapsed;
}
private void first_ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var selecteditem = first_ComboBox.SelectedItem as string;
if (selecteditem != null)
{
second_ComboBox.Visibility = Visibility.Visible;
}
}

on initialization make second combobox visiblity hidden
public MainWindow()
{
InitializeComponent();
second_ComboBox.Visibility = Visibility.Collapsed;
}
private void first_ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
first_ComboBox.Visibility = System.Windows.Visibility.Visible;
}

How can select a item from listbox binding Windows Phone 7

I can't get a text from listbox with SELECTEDITEM event but it doesn't and only return a string like "Li.Medicamento".
My code xaml:
<ListBox x:Name="list_enfer" Margin="38,210,40,65" Visibility="Collapsed">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding enfermedadasoc}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
My code in C# is the next:
private void visualizar_est_Click(object sender, System.EventArgs e)
{
MessageBox.Show(list_enfer.SelectedItem.ToString());
}

private void visualizar_est_Click(object sender, System.EventArgs e)
{
var mySelectedItem = list_enfer.SelectedItem as yourObject;
//Then you can access the property inside yourObject
MessageBox.Show(yourObject.enfermedadasoc.ToString());
}

Passing parameters between pages in Windows Phone 8 using SQL server compact

I am trying to pass parameters from my main page to another page but I have no idea what variable should i put. For an example
NavigationService.Navigate(new Uri("/ToDoDetailPage.xaml?detail" + **variable** , UriKind.Relative));
I am using SQL Server compact 3.5 and I want to get the data selected and passing it to another page. What should replace for that variable as now its just an empty variable. Here is my code that I have done:
MainPage.xaml.cs
namespace PhoneApp
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
// Set the data context of the LongListSelector control to the sample data
DataContext = App.ViewModel;
// Sample code to localize the ApplicationBar
//BuildLocalizedApplicationBar();
}
// Load data for the ViewModel Items
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (!App.ViewModel.IsDataLoaded)
{
App.ViewModel.LoadData();
}
using (DatabaseContext c = new DatabaseContext(DatabaseContext.ConnectionString))
{
c.CreateIfNotExists();
c.LogDebug = true;
//output todolist data from database
MLongListSelector.ItemsSource = c.ToDoList.ToList();
}
}
// Handle selection changed on LongListSelector
private void MainLongListSelector_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// If selected item is null (no selection) do nothing
if (MLongListSelector.SelectedItem == null)
return;
// Navigate to the new page
NavigationService.Navigate(new Uri("/ToDoDetailPage.xaml", UriKind.Relative));
// Reset selected item to null (no selection)
MLongListSelector.SelectedItem = null;
}
private void LongListSelector_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var si = MainLongListSelector.SelectedItem as PhoneApp.ViewModels.ItemViewModel;
if (MainLongListSelector.SelectedItem == null)
return;
if (si.LineOne.Equals("+ To Do List"))
NavigationService.Navigate(new Uri("/todolistPage.xaml", UriKind.Relative));
else if (si.LineOne.Equals("+ Reminder"))
NavigationService.Navigate(new Uri("/reminderPage.xaml", UriKind.Relative));
// Reset selected item to null (no selection)(//important)
MainLongListSelector.SelectedItem = null;
}
}
}
MainPage.xaml
<phone:Pivot Title="MY APPLICATION">
<!--Pivot item one-->
<phone:PivotItem Header="today">
<!--Double line list with text wrapping-->
<phone:LongListSelector x:Name="MLongListSelector" Margin="0,0,-12,0" SelectionChanged="MainLongListSelector_SelectionChanged">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding Title}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="{Binding Description}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
</StackPanel>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</phone:PivotItem>
<!--Pivot item two-->
<phone:PivotItem Header="activities">
<phone:LongListSelector x:Name="MainLongListSelector" Margin="0,0,-12,0" ItemsSource="{Binding Items}" SelectionChanged="LongListSelector_SelectionChanged">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding LineOne}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="Hello" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
</StackPanel>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</phone:PivotItem>
</phone:Pivot>
Below is the image of the breakpoint

You mean you want to pass the selected element to another page. If so, then try this :
var select_Item = companyAppList.SelectedItem;
NavigationService.Navigate(new Uri("/PageName.xaml?Select_Item="+select_Item.Text, UriKind.Relative));
and you can retrieve this parameter like this:
if (NavigationContext.QueryString.ContainsKey("Select_Item"))
{
TextBlock1.Text = NavigationContext.QueryString["Select_Item"];
}