Drag and Drop in WPF

http://www.codeproject.com/KB/WPF/ListViewDragDropManager.aspx
http://www.codeproject.com/Articles/42696/Textbox-Drag-Drop-in-WPF.aspx

Accessing Resources in Other Assemblies

<SolidColorBrush
x:Key="{ComponentResourceKey TypeInTargetAssembly={x:Type local:MyClass},
ResourceId=MyClassBrush}">Yellow</SolidColorBrush>

<Button Background="{DynamicResource {x:Static otherAssembly:MyClass.MyClassBrushKey}}"/>

WPF unleashed, page 256

Avoid Sharing a Resource

x:Shared=”False”

Merging Resources

<Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source=”±file1.xaml”±/>
                <ResourceDictionary Source=”±file2.xaml”±/>
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Window.Resources>

WPF unleashed, page 253.

Accessing Resources Embedded in Another Assembly

AssemblyReference;Component/ResourceName

WPF unleashed, page243

A complete table about resources accessing methods, page 242.

How do I create a full-trust XAML Browser Application?

If you want to take advantage of functionality that requires a higher level of trust yet still want
to be integrated into a browser,you can indeed configure an XBAP to require full trust. The
two actions to enable this are a bit convoluted,however:
1. In the ClickOnce application manifest (app.manifest),add Unrestricted=”true” to
the PermissionSet XML element. For example:
<PermissionSet class=”System.Security.PermissionSet” version=”1”
ID=”Custom” SameSite=”site” Unrestricted=”true”/>
2. In the project file (with the .csproj or .vbproj extension),change
<TargetZone>Internet</TargetZone>
to
<TargetZone>Custom</TargetZone>
You can also make this change inside Visual Studio’s project properties UI on the
Security tab.

WPF unleashed, page 231

How to enable our own library to run in the WPF browser application.

You use the same mechanism that applies to all .NET components. If you mark an assembly
with the AllowPartiallyTrustedCallers attribute and install it into the Global Assembly
Cache (which can only be done if the user trusts your code and decides to run it),any of the
assembly’s public APIs can be called by any XBAP

WPF unleashed, page 230

Nonrectangular Window, Irregular Window

<Window x:Class="MyWpfSample.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        AllowsTransparency="True" WindowStyle="None" Background="Transparent"
        Title="Window1" Height="300" Width="300"
        MouseLeftButtonDown="Window_MouseLeftButtonDown">
    <Grid>
        <Ellipse Fill="Red" Opacity="0.5" Margin="20">
            <Ellipse.BitmapEffect>
                <DropShadowBitmapEffect/>
            </Ellipse.BitmapEffect>
        </Ellipse>
        <Button Margin="100" Click="Button_Click">Close</Button>
    </Grid>
</Window>

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
    }

    private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        this.DragMove();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        this.Close();
    }
}

Referenced from book WPF unleashed, page225.

WPF Hook Message

IntPtr hwnd = new WindowInteropHelper(this).Handle;
HwndSource.FromHwnd(hwnd).AddHook(new HwndSourceHook(WndProc));

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
    if (msg == WM_PAINT)
    {
        //Do some extra actions.
    }
    return IntPtr.Zero;
}

Edit Page: PageFunction

http://msdn.microsoft.com/en-us/library/ms615540.aspx

Below is a simple sample.

PageFunction:

<PageFunction
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sys="clr-namespace:System;assembly=mscorlib" 
    x:Class="NavigateSample.PageFunction1"
    x:TypeArguments="sys:String"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="300"
    Title="PageFunction1">
    <Grid>

    </Grid>
</PageFunction>

Show page and get result:

//Instantiate the edit page.
PageFunction1 editPage = new PageFunction1();
//Show the page.
this.NavigationService.Navigate(editPage);

//Get returned result.
string result;
editPage.Return += new ReturnEventHandler<string>((object obj, ReturnEventArgs<string> arg)=>
{
    result = arg.Result;
});

Have one Frame Navigate to Another Page

<TextBlock Height="23" HorizontalAlignment="Left" Margin="66,66,0,0" Name="textBlock1" VerticalAlignment="Top" Width="278" >
    Click <Hyperlink NavigateUri="Page2.xaml">Page2</Hyperlink>
    <Hyperlink NavigateUri="Page3.xaml" TargetName="frame">Have frame navigate to another page.</Hyperlink>
</TextBlock>
<Frame Name="frame" Source="Page2.xaml" Margin="66,118,137,52" />

WPF Single Instance

http://pietschsoft.com/post/2009/01/Single-Instance-WPF-Application-in-NET-3.aspx
http://social.msdn.microsoft.com/forums/en/wpf/thread/e321cc4b-e2f3-474e-9575-bacbd2e83a60/
http://msdn.microsoft.com/en-us/library/ms771662.aspx

Notes about Application

1. The event fired when the current user logs off or shuts down the computer: SessionEnding
http://msdn.microsoft.com/en-us/library/system.windows.application.sessionending.aspx

2. Some properties about window: Windows, MainWindow
http://msdn.microsoft.com/en-us/library/system.windows.application.windows.aspx
http://msdn.microsoft.com/en-us/library/system.windows.application.mainwindow.aspx

3. Customerize how to exit an application: ShutdownMode
http://msdn.microsoft.com/en-us/library/system.windows.application.shutdownmode.aspx

4. Start window: StartupUri
http://msdn.microsoft.com/en-us/library/system.windows.application.startupuri.aspx

5. A dictionary for the windows to share information: Properties
http://msdn.microsoft.com/en-us/library/system.windows.application.properties.aspx

How to set StartUri in WPF

We can easily set the start window of a WPF application by setting the StartupUri property of the Application node in the App.xaml to the window xaml file name, such as "Window1.xaml". But if the Window1.xmal is placed in another folder, what can we do?

We only need to add the directory path before the window xaml file name, such as "Palyer/MyPlayerWindow.xaml" or "Palyer\MyPlayerWindow.xaml".