Experience in creating Silverlight controls in Python

What functions does the Python programming language help us implement? What are its main application scopes? Let's take a look at the implementation methods for creating a Silverlight Control Using Python, so as to get familiar with the application methods and features of this language.

• Main functions of the Python Thread class
• Analysis on the practical application of Python two-dimensional array
• Correct understanding of how to use Python sys. arg
• Python inheritance embodies object-oriented features
• Main steps for Python to call. net framework

In fact, I have been paying attention to Silverlight for a long time, but I was disappointed with the initial version. In my opinion, Silverlight 1.0 is equivalent to VML or SVG of the enhanced version. It was four years ago) I have always hoped that Microsoft can develop a powerful web plug-in that can compete with flash. After so long, this thing will gradually become a reality.

Okay, Silverlight 2 is available. Although it is still in beta, let's get started. I made a Visual Studio 2008 Express version with Web and C # installed, and even did not support Silverlight development of 2.0. Is there any mistake that it is intended for those controls to play SL, what should I do.

This is depressing, so I had to install the full version of Visual Studio 2008, which is very big. I sorted out the hard disk space and managed to give it a bit of space, N after a long time, I finally finished the installation. After a long time, the damn plug-in couldn't be installed again. After a long time, I still couldn't do it. I was very angry. Forget it, don't do it anymore.

So I decided not to use VS2008 to create a Silverlight control in Python. I heard that Silverlight 2.0 supports dynamic languages. I used to do JavaScript. Let's change it. I came to play with Python, so I looked for an example and found it. Why? I wrote it:

Here is the XAML file app. xaml.

 
 

  
  
< Canvas xmlns="http://schemas.microsoft.com/client/2007"   
  
  
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"   
  
  
x:Class="System.Windows.Controls.Canvas" x:Name="Page" 
Width="400" Height="300">   
  
  
< TextBlock x:Name="MsgText" Canvas.Top="10" Canvas.Left="10"> 
  
  
< /TextBlock>   
  
  
< Button x:Name="TestButton" Canvas.Top="40" Canvas.Left="10" 
Content="Test">< /Button>   
  
  
< /Canvas> 
 
 

Here is the Python file app. py

 
 

  
  
from System.Windows import Application   
  
  
from System.Windows.Controls import *   
  
  
from System.Windows.Browser import *   
  
  
class App:   
  
  
def __init__(self):   
  
  
self.scene = Application.Current.LoadRootVisual(Canvas(), "app.xaml")   
  
  
def start(self):   
  
  
self.scene.TestButton.Click += self.TestButton_Click   
  
  
def TestButton_Click(self, sender, eventArgs):   
  
  
self.scene.MsgText.Text = "Hello, world!"   
  
  
App().start() 
 
 

There is no suspense to others. Chiron/d starts to run. http: // localhost: 2060/index.htm has an effect. A text box, a button, and click the button, the box contains a hello, world!

So I was very excited. It turned out to be so fun. It seems that it was very easy to create a Silverlight control in Python. So let's create two complicated controls. What controls are pretty handsome? I think, calendar, this is a good thing. Then I started, and I added a line.

 
 

  
  
< Calendar x:Name="TestCalendar" Canvas.Top="10" Canvas.Left="10"/> 
 
 

Okay, start running. Sorry, no. I couldn't find the Calendar. I studied the document and found that it was included in System. windows. controls. extended. dll, So I copied this dll to the app directory, but it still doesn't work. What should I do? I searched it everywhere, I found that there was no article about Python calling the SL extension control, which is painful.

But I am unwilling to do so. I believe Microsoft will not be so unfriendly, so I will continue to look for help. I will add a prefix before Calendar and Calendar for namespace, but how can I define it on The XAML header, I thought about it, but I really couldn't think of it. Then I thought of Blend very cruelly. Hey, I downloaded one, installed it, created a project, and created a control, at this time, only internal controls can be used, and then I add the System referenced in the SDK directory on the project. windows. controls. extended. dll, so you can create a calendar.

This is not what I want. Switch to the XAML bar and see no. This line of code:

Xmlns: System_Windows_Controls_Extended = "clr-namespace: System. windows. controls; assembly = System. windows. controls. extended ", it turns out that it is working, so I defined it again, but it still does not work...

What's going on? I continued to work on the document and finally found that I had to write something in the Python file. I posted the complete code for creating the Silverlight control in Python, app. py

 
 

  
  
import clr   
  
  
clr.AddReference("System.Windows.Controls.Extended")   
  
  
from System.Windows import Application   
  
  
from System.Windows.Controls import *   
  
  
from System.Windows.Browser import *   
  
  
class App:   
  
  
def __init__(self):   
  
  
self.scene = Application.Current.LoadRootVisual(Canvas(), "app.xaml")   
  
  
def start(self):   
  
  
# TODO: replace this with your application start logic   
  
  
self.scene.TestButton.Click += self.TestButton_Click   
  
  
def TestButton_Click(self, sender, eventArgs):   
  
  
HtmlPage.Window.Alert(self.scene.TestCalendar.SelectedDate.ToString())   
  
  
App().start() 
 
 

Haha, No. The first two sentences are the key to the function. Below is app. xaml

 
 

  
  
< Canvas xmlns="http://schemas.microsoft.com/client/2007"   
  
  
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:System_Windows_Controls_Extended="clr-namespace:
System.Windows.Controls;assembly=System.Windows.Controls.Extended"   
  
  
x:Class="System.Windows.Controls.Canvas" x:Name="Page" 
Width="400" Height="300">   
  
  
< System_Windows_Controls_Extended:Calendar 
x:Name="TestCalendar" Canvas.Top="10" Canvas.Left="10"/>   
  
  
< Button x:Name="TestButton" Canvas.Top="180" 
Canvas.Left="10" Content="Test">< /Button>   
  
  
< /Canvas> 
 
 

The preceding section describes how to create a Silverlight control in Python.