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--> DataBinding 到enum valuem, Copy & Paste如下
Some of the FAQs about data binding are:
• How do I bind to a method?
• How do I bind between instantiated controls?
• How do I bind an ItemsControl to an enum?
I put together a quick sample that should answer the above questions:
<Window
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"
SizeToContent="WidthAndHeight"
Title="Show Enums in a ListBox using Binding">
<Window.Resources>
<ObjectDataProvider MethodName="GetValues"
ObjectType="{x:Type sys:Enum}"
x:Key="AlignmentValues">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="HorizontalAlignment" />
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</Window.Resources>
<Border Margin="10" BorderBrush="Aqua"
BorderThickness="3" Padding="8">
<StackPanel Width="300">
<TextBlock>Choose the HorizontalAlignment
value of the Button:</TextBlock>
<ListBox Name="myComboBox" SelectedIndex="0" Margin="8"
ItemsSource="{Binding Source={StaticResource
AlignmentValues}}"/>
<Button Content="Click Me!"
HorizontalAlignment="{Binding ElementName=myComboBox,
Path=SelectedItem}"/>
</StackPanel>
</Border>
</Window>
I am curious what online resources people have found to be excellent. The ones I frequent are listed below and contain video lectures: 1. Stanford collection of Knuth videos 2. University of Texas collection of Dijkstra videos 3. Vega Video Collection of Feynman Lectures 4. MIT's Open CourseWare - Numerous video lectures are featured here, including full courses in Linear Algebra, Mathematics for Engineering, Differential Equations, and Physics 1, 2, and 3. The Physics lectures are by Walter Lewin who is amazing. 5. Webcast Archive of Berkeley Courses 6. SICP Video Lectures by Abelson and Sussman 7. QMUL Mirror of the ArsDigita courses 8. Clay Math Video Collection - Numerous videos including Timothy Gowers speaking on the importance of mathematics, and Wiles and Witten talking to the 2001 IMO competitors. 9. Archive.org Collection of ArsDigita Colloquia - Includes terrific lectures by Sipser on the history of NP vs P, and Sussman on the legacy of Computer Science. Also includes videos by Richard Stallman.
using System.Threading
using System.Runtime.InteropServices;
public class Form1 : Form
{
[STAThread]
static void Main()
{
bool createdNew;
Mutex m = new Mutex(true, "YourAppName", out createdNew);
if (! createdNew)
{
// app is already running...
MessageBox.Show("Only one instance of this application is allowed at a time.");
return;
}
Application.Run(new Form1());
// keep the mutex reference alive until the normal termination of the program
GC.KeepAlive(m);
}
}
另外 要foreground exising one的話 code below
f your application can run with Full Trust permissions, we can take
this a step further and find the window of the application instnace
already running and bring it to the front for the user:
public class Form1 : Form
{
[STAThread]
static void Main()
{
bool createdNew;
System.Threading.Mutex m = new System.Threading.Mutex(true, "YourAppName", out createdNew);
if (! createdNew)
{
// see if we can find the other app and Bring it to front
IntPtr hWnd = FindWindow("WindowsForms10.Window.8.app3", "YourAppName");
if(hWnd != IntPtr.Zero)
{
Form1.WINDOWPLACEMENT placement = new Form1.WINDOWPLACEMENT();
placement.length = Marshal.SizeOf(placement);
GetWindowPlacement(hWnd, ref placement);
if(placement.showCmd != SW_NORMAL)
{
placement.showCmd = SW_RESTORE;
SetWindowPlacement(hWnd, ref placement);
SetForegroundWindow(hWnd);
}
}
return;
}
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