Part III in .NET

Encoding qrcode in .NET Part III
Part III
QR Code barcode library for .net
generate, create denso qr bar code none on .net projects
Programming Silverlight Applications
Visual Studio .NET qr code decoder on .net
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Dynamically deleting XAML elements
.NET bar code implementation on .net
using barcode printer for .net framework control to generate, create bar code image in .net framework applications.
Using code-behind pages, you can also dynamically remove XAML elements from an object. This is done by accessing the Children attribute of an XAML element that contains child elements. You can use the Remove method of the Children object to remove child objects from an existing object. For example, consider the following code that exposes a Canvas object using the name myCanvas, the canvas contains a child TextBlock object name txtBlock:
scan bar code in .net
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
<Canvas x:Name= myCanvas > <TextBlock x:Name= txtBlock Text= MssEd UP Txt! /> </Canvas>
Control qr-code data in visual
qr-codes data on visual
You could use the following C# code to remove the TextBlock element from the Canvas:
Draw qr code for .net
generate, create qr codes none with .net projects
Control qr code 2d barcode image in visual
use visual .net qr code 2d barcode drawer tobuild qr code with vb
Using the Children.Remove() method, you can remove any object that is a UIElement and a child of the current object. To illustrate this further, consider the code in Listing 8.5.
Pdf417 2d Barcode barcode library with .net
using .net framework toembed pdf417 for web,windows application
.net Framework qrcode implementation with .net
generate, create qrcode none for .net projects
C# Code-Behind File That Adds an Event Handler to a Grid Element and Dynamically Adds Rectangle Objects with Event Handlers That Handle the Removal of the Object
Access barcode in .net
use .net crystal barcode creation toprint bar code on .net
using using using using using using using System; System.Windows; System.Windows.Controls; System.Windows.Input; System.Windows.Media; System.Windows.Media.Animation; System.Windows.Shapes;
Barcode barcode library in .net
use .net vs 2010 bar code printer toembed bar code in .net
namespace proj0802 { public partial class Page : UserControl { public Page() { InitializeComponent();
Include international standard serial number with .net
use .net crystal issn maker toattach issn for .net
Programming .NET Silverlight Applications
Barcode creation in microsoft word
use word bar code printer toconnect bar code for word
playArea.MouseLeftButtonUp += new MouseButtonEventHandler(playArea_Add); } void playArea_Add(object sender, MouseButtonEventArgs e) { Point location = e.GetPosition(null); Rectangle aBlock = new Rectangle(); aBlock.Height = 40; aBlock.Width = 40; aBlock.StrokeThickness = 3; aBlock.Stroke = new SolidColorBrush(Colors.Blue); aBlock.Fill = new SolidColorBrush(Colors.Red); aBlock.HorizontalAlignment = HorizontalAlignment.Left; aBlock.VerticalAlignment = VerticalAlignment.Top; aBlock.Margin = new Thickness(location.X, location.Y, 0, 0); aBlock.MouseLeftButtonUp += new MouseButtonEventHandler(blockDelete); LayoutRoot.Children.Add(aBlock); } void blockDelete(object sender, MouseButtonEventArgs e) { Rectangle block = sender as Rectangle; LayoutRoot.Children.Remove(block); } } }
Listing 8.5 adds some additional functionality to that of Listing 8.4. Now when a Rectangle is created, a MouseLeftButtonUp event handler is added before adding it to the root canvas. Inside that event handler, we retrieve the sender as a Rectangle object and then implement the Children.Remove() method to remove the Rectangle that was clicked from the root canvas. Figure 8.3 shows the results of clicking on Rectangle objects in the Web browser. Inside the event handler for the Rectangle objects in Listing 8.5, the Rectangle is removed from the rendered XAML when you click it with the mouse.
Android barcode drawer with java
use android barcode printing tocreate barcode for java
Part III
Bar Code encoder with microsoft word
use microsoft word bar code writer toproduce bar code with microsoft word
Programming Silverlight Applications
Java barcode reader with java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
FIGURE 8.3 Silverlight application that removes the added rectangle objects from the rendered XAML each time they are clicked by the mouse
Report RDLC ucc.ean - 128 implementation in .net
using rdlc report toreceive ean128 for web,windows application
Implementing Event Handling
Control upc - 13 image with microsoft word
use office word ean13 integration todevelop ean / ucc - 13 for office word
One of the strengths of Silverlight is how easy it is to implement event handling in applications. Event handling is accomplished by attaching a specific event handler to an object. In Silverlight, this can be done either in the XAML code or in the managed code-behind file. In XAML, an event handler can be attached to an object by setting the event attribute to the name of the handler function in the code-behind page. For example, the following code attached the MouseEnterHandler() function to the MouseEnter attribute of a TextBlock element:
Control code 128b data on java
code128b data with java
<TextBlock MouseEnter= MouseEnterHandler />
To attach an event handler in the code-behind page, you need to create a new event handler object and add it to the event handler attribute of the Silverlight control. For example, the following code attached the myText_MouseLeave() function to the MouseLeave attribute of a TextBlock control named myText:
myText.MouseLeave += new MouseEventHandler(myText_MouseLeave);
Listings 8.6 and 8.7 show the full implementation of the MouseEnter and MouseLeave events in the XAML and C# code-behind files.
XAML File That Attaches a MouseEnter Event Handler to a TextBlock Silverlight Control
<UserControl x:Class= proj0803.Page xmlns=
Programming .NET Silverlight Applications
xmlns:x= Width= 400 Height= 300 > <Grid x:Name= LayoutRoot Background= White > <TextBlock x:Name= myText Text= Mouse is Gone MouseEnter= MouseEnterHandler /> </Grid> </UserControl>
C# Code-Behind File That Implements MouseEnter and MouseLeave Event Handlers
using using using using System; System.Windows; System.Windows.Controls; System.Windows.Input;
namespace proj0803 { public partial class Page : UserControl { public Page() { InitializeComponent(); myText.MouseLeave += new MouseEventHandler(myText_MouseLeave); } private void MouseEnterHandler(object sender, MouseEventArgs e) { var txtBlock = sender as TextBlock; txtBlock.Text = Mouse at + e.GetPosition(LayoutRoot).ToString(); txtBlock.FontSize = 20; } void myText_MouseLeave(object sender, MouseEventArgs e) { myText.Text = Mouse is Gone ; myText.FontSize = 10; } } }