How to close popup in silverlight? - silverlight

Question

I have ListBox. when i click on ListBox item I have to show item information in popup But it does not close after clicking out side. I am creating popup in itemsselected event. how to handle popup close?

Answer 1

One approach is to create a canvas with a transparent background that you make visible at the same time as opening the Popup and attaching to is Mouse down event to closed the popup. Like this:-
Xaml:-
<Grid x:Name="LayoutRoot" Background="White" >
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Popup x:Name="MyPopup" Closed="MyPopup_Closed" HorizontalOffset="100" VerticalOffset="100" Opened="Popup_Opened">
<ListBox x:Name="PopupChild" MaxHeight="300" LostFocus="PopupChild_LostFocus">
<sys:String>Hello World</sys:String>
</ListBox>
</Popup>
<Button Content="Open Popup" Grid.Row="1" Click="Button_Click" />
<Canvas x:Name="PopupOpen" Visibility="Collapsed" Background="Transparent" Grid.RowSpan="2" MouseLeftButtonDown="PopupOpen_MouseLeftButtonDown" />
</Grid>
Code:-
private void Button_Click(object sender, RoutedEventArgs e)
{
MyPopup.IsOpen = true;
}
private void Popup_Opened(object sender, EventArgs e)
{
PopupOpen.Visibility = Visibility.Visible;
}
private void PopupChild_LostFocus(object sender, RoutedEventArgs e)
{
MyPopup.IsOpen = false;
}
private void PopupOpen_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
MyPopup.IsOpen = false;
}
private void MyPopup_Closed(object sender, EventArgs e)
{
PopupOpen.Visibility = Visibility.Collapsed;
}
Note that its important that if your popup contains a control that can receive the focus that you also handle LostFocus.

Answer 2

This is similar to a question that I had. Take a look at How to dismiss a popup in Silverlight when clicking outside of the control?. I posted in my solution an extension method that's been very helpful in making popups close when clicking outside of them.

Answer 3

I'm not quite sure what you mean by "clicking out side" because popups act in a modal way.
You should set up your popup window as a ChildWindow. Then you can handle the Closed event.
Here's a very simple sample that shows a selected string from a listbox in a main window.
First the main window:
<UserControl x:Class="PopupTest.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel Orientation="Vertical">
<ListBox x:Name="SomeList" Width="100" Height="100" />
<TextBlock x:Name="DialogResult" Width="100" />
</StackPanel>
</Grid>
In the codebehind, the popup is triggered when the list selection changes. Simply set up a Closed handler. In this example, I simply put the chosen list item into a textblock, then upon closing the popup, I just put the dialog result in a textblock on the main window (to show if the user pushed ok or cancel).
public MainPage()
{
InitializeComponent();
SomeList.SelectionChanged += new SelectionChangedEventHandler(SomeList_SelectionChanged);
SomeList.Items.Add("one");
SomeList.Items.Add("two");
SomeList.Items.Add("three");
}
void SomeList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var popup = new SomePopup();
popup.Closed += new EventHandler(popup_Closed);
popup.ChosenItem.Text = (string)SomeList.SelectedItem;
DialogResult.Text = "";
popup.Show();
}
void popup_Closed(object sender, EventArgs e)
{
var popup = sender as SomePopup;
if (popup.DialogResult == true)
DialogResult.Text = "Ok";
else
DialogResult.Text = "Cancel";
}
The popup closes when the user pushes Ok or Cancel, because the DialogResult value is set in the popup's code-behind:
private void OKButton_Click(object sender, RoutedEventArgs e)
{
this.DialogResult = true;
}
private void CancelButton_Click(object sender, RoutedEventArgs e)
{
this.DialogResult = false;
}