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这个示例主要是把popup封装成一个能用的自定义类库，当然在功能上还有很多不足，抛砖引玉吧。
1.新建一个windows phone项目（phoneapp1）。
2.在解决方案中再新建一个windows phone的类库项目(cuspopup)。
3.phoneapp1引用cuspopup。
4.在cuspopup中新建一个用户自定义控件(popuppannel.xaml)。
5. 在cuspopup中新建一个类文件(popupmain.cs)。
注：phoneapp1用来做示例演示，cuspopup是我们要做功能的主要部分，其中popuppannel.xaml的作用是弹出层的内容，赋给popup.child，这里的内容很简单我只放了一个textblock用于显示进度；popupmain.cs是主要功能类，它的作用是显示/隐藏popuppannel的内容，开启一个后台进程，并做一些其它事情。
6.在popuppannel.xaml页中放入一个textblock控件，位置和样式根据需要调整。
7.popupmain.cs的代码如下：
view code
1 using system;
2 using system.collections.generic;
3 using system.windows;
4 using system.windows.controls;
5 using system.componentmodel;
6 using system.windows.controls.primitives;
7 namespace cuspopup
8 {
9 public class popupmain
10 {
11 private popup popup;
12 private backgroundworker backgroundworker;
13 private action<object, doworkeventargs> dowork;
14 private action<object, runworkercompletedeventargs> runworkercompleted;
15 private action<object, progresschangedeventargs> progresschanged;
16 /// <summary>
17 /// 打开进度状态显示
18 /// </summary>
19 public void openpopup()
20 {
21 if (popup == null)
22 popup = new popup();
23 popup.child = new cuspopup.popuppannel();
24 popup.isopen = true;
25
26 }
27 /// <summary>
28 /// 关闭进度状态显示
29 /// </summary>
30 public void closepopup()
31 {
32 popup.isopen = false;
33 }
34 /// <summary>
35 /// 进度改变后把信息显示到页面上
36 /// </summary>
37 /// <param name="progresspercentage"></param>
38 public void backgroundworkerprogresschanged(int progresspercentage)
39 {
40 cuspopup.popuppannel cuspopup = popup.child as cuspopup.popuppannel;
41 cuspopup.textblock2.text = string.format("{0}%", progresspercentage);
42
43 }
44 /// <summary>
45 /// 开启一个backgroundworker
46 /// </summary>
47 /// <param name="dowork"></param>
48 /// <param name="runworkercompleted"></param>
49 /// <param name="progresschanged"></param>
50 /// <param name="obj"></param>
51 public void runbackgroundworker(action<object,doworkeventargs> dowork, action<object, runworkercompletedeventargs> runworkercompleted, action<object, progresschangedeventargs> progresschanged,object obj=null)
52 {
53 dowork = dowork;
54 runworkercompleted = runworkercompleted;
55 progresschanged = progresschanged;
56 backgroundworker = new backgroundworker();
57 backgroundworker.workerreportsprogress = true;
58 backgroundworker.dowork += new doworkeventhandler(backgroundworker_dowork);
59 backgroundworker.runworkercompleted += new runworkercompletedeventhandler(backgroundworker_runworkercompleted );
60 backgroundworker.progresschanged += new progresschangedeventhandler(backgroundworker_progresschanged);
61 backgroundworker.runworkerasync(obj);
62 }
63
64 void backgroundworker_progresschanged(object sender, progresschangedeventargs e)
65 {
66 progresschanged(sender, e);
67 }
68
69 void backgroundworker_runworkercompleted(object sender, runworkercompletedeventargs e)
70 {
71 if (runworkercompleted != null)
72 runworkercompleted(sender,e);
73 }
74
75 void backgroundworker_dowork(object sender, doworkeventargs e)
76 {
77 if (dowork != null)
78 dowork(sender, e);
79
80 }
81 }
82 }
8.在phoneapp1中的mainpage.xaml.cs中写如下代码：
view 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 microsoft.phone.controls;
13 using system.threading;
14 using system.componentmodel;
15 using system.windows.controls.primitives;
16 namespace phoneapp1
17 {
18 public partial class mainpage : phoneapplicationpage
19 {
20 cuspopup.popupmain popupmain;//定义一个对象
21 public mainpage()
22 {
23 initializecomponent();
24 popupmain = new cuspopup.popupmain();//初始化
25 showpopup();
26 }
27 /// <summary>
28 /// 执行
29 /// </summary>
30 private void showpopup()
31 {
32 popupmain.openpopup();//打开层
33 //开启一个后台进程，并做一些其它的
34 popupmain.runbackgroundworker(
35 (obj, doworkeventargs) =>
36 {
37 dowork(obj, doworkeventargs);
38 },
39 (obj, runworkercompletedeventargs) =>
40 {
41 runworkercompleted(obj, runworkercompletedeventargs);
42 },
43 (obj, progresschangedeventargs) =>
44 {
45 progresschanged(obj, progresschangedeventargs);
46 },
47 null);
48
49 }
50
51
52 void progresschanged(object sender, progresschangedeventargs e)
53 {
54 popupmain.backgroundworkerprogresschanged(e.progresspercentage);
55 }
56
57 void runworkercompleted(object sender, runworkercompletedeventargs e)
58 {
59 //do something
60 popupmain.closepopup();
61 }
62
63 void dowork(object sender, doworkeventargs e)
64 {
65 backgroundworker worker = sender as backgroundworker;
66 for (int i = 0; i < 100; i++)
67 {
68 worker.reportprogress(i + 1);
69 thread.sleep(100);
70 }
71 }
72 }
73 }
在这里，dowork我只是做了一个循环延时，然后把进度报告给backgroundworker,并执行backgroundworkerprogresschanged使界面上的文字发生变化显示。runworkercompleted完成后关闭状态进度。方法的最后一个参数为null，如果dowork需要参数可以从这里传入。
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