Using the Silverlight Presentation Framework in .NET

Printing Quick Response Code in .NET Using the Silverlight Presentation Framework
Using the Silverlight Presentation Framework
QR Code ISO/IEC18004 barcode library in .net
generate, create qrcode none for .net projects
IsolatedStorageFileStream stream = new IsolatedStorageFileStream( test.dat , FileMode.Create, localStore);
.net Vs 2010 denso qr bar code decoder on .net
Using Barcode decoder for .net vs 2010 Control to read, scan read, scan image in .net vs 2010 applications.
The IsolatedStorageFileStream implements the FileMode.Create mode on a file named test.dat using the localStore object. Using the stream object, the code then creates a StreamWriter object that writes the text in the saveText TextBox to the test.dat file in the local storage using the following code:
Bar Code integrating in .net
generate, create bar code none for .net projects
StreamWriter sWriter = new StreamWriter(stream); sWriter.WriteLine(saveText.Text);
Bar Code barcode library in .net
using barcode drawer for .net crystal control to generate, create barcode image in .net crystal applications.
Inside the getBtn_Click() handler function, the code first creates a new IsolatedStorageFileStream object named stream using the following code:
Control qr-codes data on c#.net
qr bidimensional barcode data for visual c#
IsolatedStorageFileStream stream = new IsolatedStorageFileStream( test.dat , FileMode.Open, localStore);
Control qr code size with .net
to create qr codes and qr-codes data, size, image with .net barcode sdk
The IsolatedStorageFileStream implements the FileMode.Open mode on a file named test.dat so that the file can be read from. Using the stream object, the code then creates a StreamReader object that reads a line of text from the test.dat file in the isolated local storage and uses the text to set the Text property of the getText TextBlock using the following code:
Receive qr-code on vb
using .net toembed qr code 2d barcode on asp.net web,windows application
StreamReader sReader = new StreamReader(stream); getText.Text = sReader.ReadLine();
Assign pdf417 on .net
use .net barcode pdf417 integration todraw pdf-417 2d barcode in .net
The results are shown in Figure 13.4. When the user clicks Save, the text in the saveText TextBox control is stored in the isolated local storage. When the user clicks Retrieve, the text is loaded in the getText textBlock control even if the browser has been closed and the application completely reloaded.
.net Vs 2010 1d barcode generation with .net
using visual studio .net toencode linear barcode on asp.net web,windows application
LISTING 13.10
EAN13 barcode library on .net
use .net crystal ean13 printing toconnect ean13+2 with .net
C# Code That Displays a Button and TextBox Control Nested in a ScrollViewer
Barcode barcode library on .net
generate, create bar code none on .net projects
using using using using using System; System.Windows; System.Windows.Controls; System.Windows.Documents; System.Windows.Input;
International Standard Serial Number maker for .net
using barcode generating for .net control to generate, create issn image in .net applications.
//Add Isolated Storage Library using System.IO; using System.IO.IsolatedStorage; namespace SLIsolatedStorage
Control data matrix barcode size on .net
to embed data matrix and data matrix data, size, image with .net barcode sdk
continued
Part IV
Control code-128c data on excel spreadsheets
to access code 128 and barcode code 128 data, size, image with microsoft excel barcode sdk
Understanding Silverlight Frameworks
Control gs1 128 data on office excel
ucc - 12 data with excel
LISTING 13.10 {
Add gtin - 128 on c#
using barcode generation for asp.net website crystal control to generate, create image in asp.net website crystal applications.
(continued)
Code 128 Code Set A development on c#
using barcode maker for .net for windows forms crystal control to generate, create code 128 code set b image in .net for windows forms crystal applications.
public partial class Page : UserControl { IsolatedStorageFile localStore; public Page() { InitializeComponent(); //Initialize Handlers saveBtn.Click += new RoutedEventHandler(saveBtn_Click); getBtn.Click += new RoutedEventHandler(getBtn_Click); localStore = IsolatedStorageFile.GetUserStoreForApplication(); } void saveBtn_Click(object sender, RoutedEventArgs e) { //Remove any existing data files string[] files = localStore.GetFileNames( *.dat ); if (files.Length != 0) foreach (string name in files) localStore.DeleteFile(name); //Write a new data file IsolatedStorageFileStream stream = new IsolatedStorageFileStream( test.dat , FileMode.Create, localStore); StreamWriter sWriter = new StreamWriter(stream); sWriter.WriteLine(saveText.Text); sWriter.Close(); stream.Close(); } void getBtn_Click(object sender, RoutedEventArgs e) { //Open and read Isolated Storage data file IsolatedStorageFileStream stream = new IsolatedStorageFileStream( test.dat , FileMode.Open, localStore); StreamReader sReader = new StreamReader(stream); getText.Text = sReader.ReadLine(); sReader.Close(); stream.Close(); } } }
Control ean13 size for .net
ean13 size in .net
Using the Silverlight Presentation Framework
Qr Bidimensional Barcode generating in visual basic.net
generate, create qr bidimensional barcode none on vb projects
FIGURE 13.4 Silverlight application that allows users to save and retrieve text from the isolated local storage
Implementing Threading in Silverlight Applications
Silverlight provides the ability for you to add threading functionality to your applications. Threading enables you to work in the background on the client without affecting the functionality of the Silverlight application. This can be very useful if you need to do time-consuming tasks such as downloading resources or complex calculations. There are a couple of different methods to implement threads. One method is to implement a timer thread that sleeps and wakes up at a defined interval to process work. Timer threads are very useful to implement time-critical events. Another method is to implement a background worker thread that simply runs from start to completion. Background threads are great for taking away heavy workload from the UI thread so that the Silverlight controls are updated quickly.
Implementing a timer thread
Timer threads are implemented in Silverlight applications using the DispatchTimer class, which is part of the System.Windows.Threading library. The DispatcherTimer implements threads that wake up on a specific interval and execute a defined function in the Silverlight application and then sleep. The UI thread in the Silverlight application is responsible for starting and stopping the DispatchTimer thread. To implement a DispatchTimer thread, you need to create an instance of the class and then set the Interval property and Tick event handler of the DispatcherTimer object. The Interval property is a TimeSpan object that defines at what interval to wake up the thread.
Part IV
Understanding Silverlight Frameworks
The Tick event handler is a RoutedEvent handler that points to a Silverlight function to run when the timer wakes up. For example, the following code creates a DispatcherTimer thread named alarm that wakes up every 5 seconds and calls a function named WakeUp():
DispatcherTimer alarm = new DispatcherTimer(); alarm.Interval = new TimeSpan(0, 0, 0, 5, 0); alarm.Tick += new EventHandler(WakeUp);
The DispatchTimer object also contains a Start() and Stop() method. The Start() method creates a timer thread and begins the interval wait. Each time the interval is reached, the Tick event handler is called. The thread continues to run until the Stop() method is executed.