Silverlight loading large image progress prompt

When using large images in Silverlight, loading may be slow and the progress is displayed.

1. Create a user control lodingimage. XAML

The XAML is as follows:

 

Code

 <Grid X: Name = "layoutroot" background = "white">
<Image X: Name = "IMG"/>
<Image Source = "default.png" X: Name = "imgback"/>
<Textblock text = "loading 85%" X: Name = "txtloading" horizontalalignment = "center" foreground = "yellow" verticalalignment = "center"/>
</GRID>

 

CS is as follows:

 

Code

 1 using system;
2 using system. Collections. Generic;
3 using system. LINQ;
4 using system. net;
5 using system. windows;
6 using system. Windows. controls;
7 using system. Windows. documents;
8 using system. Windows. input;
9 using system. Windows. Media;
10 using system. Windows. Media. animation;
11 using system. Windows. shapes;
12 using system. Windows. Media. imaging;
13
14 namespace webimage
15 {
16 public partial class lodingimage: usercontrol
17 {
18 /// <summary>
19 // image address
20 /// </Summary>
21 Public String URI {Get; set ;}
22 public stretch imagestretch
23 {
24 get {return IMG. Stretch ;}
25 set {IMG. Stretch = value ;}
26}
27
28 bitmapimage;
29
30 public lodingimage ()
31 {
32 initializecomponent ();
33 this. Loaded + = new routedeventhandler (lodingimage_loaded );
34}
35
36 void lodingimage_loaded (Object sender, routedeventargs E)
37 {
38 bitmapimage = new bitmapimage ();
39 IMG. Source = bitmapimage;
40 bitmapimage. urisource = new uri (URI );
41 IMG. Stretch = stretch. Fill;
42 bitmapimage. downloadprogress + = new eventhandler <downloadprogresseventargs> (img_downloadprogress );
43 bitmapimage. imagefailed + = new eventhandler <exceptionroutedeventargs> (img_imagefailed );
44 bitmapimage. imageopened + = new eventhandler <routedeventargs> (img_imageopened );
45
46}
47
48 void reload ()
49 {
50 bitmapimage = new bitmapimage ();
51}
52
53 void img_imageopened (Object sender, routedeventargs E)
54 {
55 imgback. Visibility = txtloading. Visibility = system. Windows. Visibility. collapsed;
56
57}
58
59 void img_imagefailed (Object sender, exceptionroutedeventargs E)
60 {
61 txtloading. Text = string. Format ("loading failed ");
62}
63
64 void img_downloadprogress (Object sender, downloadprogresseventargs E)
65 {
66 txtloading. Text = string. Format ("loading {0} %", E. Progress );
67}
68}
69}
70

 

 

2. The call is as follows:

<Wimage: lodingimage uri = "http: // 192.168.23.small: 88/image/big.jpg "width =" 350 "Height =" 280 "horizontalalignment =" Left "imagestretch =" Uniform "/>

Based on the practices of this student

Http://www.cnblogs.com/struggle-luan/archive/2009/01/04/1368471.html

Source code download