I have created a WPF app that has navigation between two pages.
I want a control(a groupbox) from one of the pages to be hidden by default and to be able to enable it when pressing a keycombo.
Home1 is the name of the page and bgdb is the name of the groupbox.
Home1_Loaded is hooked up to the page loading inside a frame in MainWindow
public void Home1_Loaded(object sender, RoutedEventArgs e)
{
bdgb.Visibility = Visibility.Collapsed;
}
What modifications need to be done so I can access bgdb from MainWindow class and unhide it via a keycombo (ex Ctrl+B) ?
this is the code for mainwindow loading the homepage by default
private void Window_Initialized(object sender, EventArgs e)
{
Main.Content = new home();
Main.Navigate(new Uri("home.xaml", UriKind.RelativeOrAbsolute));
}
If you are hosting the Page in a Frame element in the MainWindow, you could cast the Content property of the Frame to Home1 and then access any of its members, e.g.:
Home1 home1 = e.Content as Home1;
if (home1 != null)
home1.bdgb.Visibility = Visibility.Collapsed;
MainWindow.xaml:
<Frame x:Name="frame" />
You could for example handle the Navigated event for the Frame:
private void Window_Initialized(object sender, EventArgs e)
{
Main.Content = new home();
Main.Navigated += Main_Navigated;
Main.Navigate(new Uri("home.xaml", UriKind.RelativeOrAbsolute));
}
private void Main_Navigated(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
home home1 = Main.Content as home;
if (home1 != null)
home1.bdgb.Visibility = Visibility.Collapsed;
Main.Navigated -= Main_Navigated;
}
Related
I'm working on WPF project where I populate a tree view (MainWindow.xaml)using a Class called SampleTreeItem (SampleTreeView class). This tree view shows files from the selected folder. when user clicks the tree item (mainWindow.cs), the code in the background opens the file, serializes it and extract the data from it.
Now I'm adding a checkbox to this tree through the class using header template.
There is event called OnItemSelected (in Mainwindow.cs) which gets fired when I select item from tree view.
I'm trying to handle the click event of the checkbox in Sampletree.cs and I want to fire OnItemSelected from mainwindow.cs when user clicks on the check box.
MainWindow.xaml.cs
private void filesTreeView_OnItemSelected(object sender, RoutedEventArgs e)
{
SampleFileTreeItem treeViewItem = e.Source as SampleFileTreeItem;
if (treeViewItem == null)
return;
OpenSampleFile(treeViewItem.FilePath);
}
This is the click event in the SampleTree.cs file.
public void CompareSamples_Click(object sender, RoutedEventArgs e)
{
//RoutedEvent routedEvent = e.RoutedEvent;
//e.Handled= true;
//e.Source = this;
//RoutedEventArgs args = new RoutedEventArgs(routedEvent, e);
RoutedEvent routedEvent = TreeView.SelectedItemChangedEvent;
e.Source = this;
RoutedEventArgs args = new RoutedEventArgs(routedEvent, e);
if (compareSamplesCheckbox.IsChecked == true)
{
OnSelected(args);
}
else
{
//object sender, RoutedEventArgs e
}
}
I don't know what I'm missing here but I cant fire OnItemSelected (mainWinodw) from SampleTree.cs.
Let me know if anyone has any thoughts on it. Appreciate any help.
I assume, that OnSelected(..) is an event handler. So in your code you need not to call an event handler, but to raise an event for the UIElement:
public void CompareSamples_Click(object sender, RoutedEventArgs e)
{
RoutedEvent routedEvent = TreeView.SelectedItemChangedEvent;
e.Source = this;
RoutedPropertyChangedEventArgs<object> args = new RoutedPropertyChangedEventArgs<object>(oldVal, newVal, routedEvent);
if (compareSamplesCheckbox.IsChecked == true)
{
yourTreeView.RaiseEvent(args);
}
else
{
//object sender, RoutedEventArgs e
}
}
I am trying to display the selection from a combobox in a textbox on a different page when a button is clicked. I thinking of using NavigationService, but I am not sure if that is the right way to go or not. In this part of the code I am getting the correct value and for testing I am displaying in messagebox, and that is working.
private void Button_Click(object sender, RoutedEventArgs e)
{
itemSelection = SubItemBox.Text;
NavigationService.Navigate(
new Uri("/Display.xaml?Message=" + itemSelection,
UriKind.Relative)
);
MessageBox.Show(itemSelection);
}
I am having an issue figuring out where to go next, I can't figure out how to get the itemSelection to dispaly in Display.xaml
namespace CateringDisplay
{
public partial class Display : Page
{
string itemSelection;
public Display()
{
InitializeComponent();
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
}
}
}
Any help would be appreciated as I am trying to learn WPF
Instead of using navigation, you could try the Event Aggregator (https://msdn.microsoft.com/en-us/library/ff921122.aspx):
You define an event:
public class SelectionChangedEvent : PubSubEvent<string> { }
You subscribe to the event in the Display Page
public partial class Display : Page
{
string itemSelection;
public Display()
{
InitializeComponent();
IEventAggregator eventAggregator = Locator.GetInstance<IEventAggregator>();
eventAggregator.GetEvent<SelectionChangedEvent>().Subscribe(OnSelectionChanged);
}
private void OnSelectionChanged(string obj)
{
itemSelection = obj;
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
}
}
The event handler updates your item selection using the event payload. Finally you fire the event from the button click event handler:
private void Button_Click(object sender, RoutedEventArgs e)
{
itemSelection = SubItemBox.Text;
IEventAggregator eventAggregator = Locator.GetInstance<IEventAggregator>();
eventAggregator.GetEvent<SelectionChangedEvent>().Publish(itemSelection);
MessageBox.Show(itemSelection);
}
Hope it helps.
i want to show contents of window in wpf when click on button
i think will use container controls like stake panel but doesn't work
private void RibbonButton_Click(object sender, RoutedEventArgs e)
{
Window1 w1 = new Window1();
stkShow.Children.Add(w1);
}
You need to use the content of the window you want to use as child.
This worked for me.
private void RibbonButton_Click(object sender, RoutedEventArgs e)
{
Window1 Child = new Window1();
StkPanelContent.Children.Clear();
object content = Child.Content;
Child.Content = null;
Child.Close();
this.stkShow.Children.Add(content as UIElement);
}
I hope it helps.
I have a winform called form1 which has tabcontrol with some tabpages and one button on clicking of which I open another form called form2. I want to add tabpage to form1 tabcontrol on click of button which is present on form2.
Assumed that you have not created a tabcontrol at runtime in the Firstform.
In FirstForm.cs
private void button1_Click(object sender, EventArgs e)
{
SecondForm obj = new SecondForm(this);
obj.Show();
}
public void addTabpage()
{
TabPage tbpg = new TabPage();
tbpg.Text = "New tabpage";
tabControl1.TabPages.Add(tbpg);
this.BringToFront();
}
In SecondForm.cs, change the constructor as follows
static FirstForm objpub;
public SecondForm(FirstForm obj)
{
InitializeComponent();
objpub = obj;
}
private void button1_Click(object sender, EventArgs e)
{
if (objpub != null)
{
objpub.addTabpage();
}
}
If this answer does not meet your problem, then provide your code.
Cheers !
I’d like to load a page into frame with key binding using ‘Ctrl’ and ‘H’ buttons from a keyboard. I can load page. It is working now. I am wondering if I can just override UriSource link with what it is now into frame. I assign UriSources in XML and I need to override one instance instead of introducing new UriSource to keep the index not changed. Any ideas? Thank you in advance!
public partial class MainWindow : Window
{
public static RoutedUICommand LoadShareSelectedCommand = new RoutedUICommand();
public MainWindow()
{
InitializeComponent();
this.CommandBindings.Add(new CommandBinding(LoadShareSelectedCommand, LoadShareSelectedCommandExecuted));
KeyGesture kg = new KeyGesture(Key.H, ModifierKeys.Control);
InputBinding ib = new InputBinding(LoadShareSelectedCommand, kg);
this.InputBindings.Add(ib);
}
private void LoadShareSelectedCommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
this.ContentFrame.NavigationService.Navigate(new Uri("Pages/SharesSelected.xaml", UriKind.Relative));
}
private void LoadShareSelectedCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = true;
}
private void NavShareSelected(object sender, RoutedEventArgs e)
{
this.ContentFrame.NavigationService.Navigate(new Uri("Pages/SharesSelected.xaml", UriKind.Relative));
}
}