在播放视频时，直接查看页面源文件可看到视频文件地址，MediaPlayer控件播放器将在页面上加上如下初始化语句：
MediaPlayer控件初始化可查看到源文件地址
Sys.Application.add_init(function()
{
$create(Sys.UI.Silverlight.MediaPlayer,
{
"autoPlay":true,"mediaSource":"http://211.142.31.235/Nas1/VOD/CP0001/490Kbps/D/DI/DIA/DiaoZhongYuan1/DiaoZhongYuan1.wmv",
"scaleMode":2,"source":"UserControl/playerTheme/player.xaml","volume":1},
null, null,
$get("myUserMediaPlayer_player_parent"));
});
解决方案是先建立一个字符串加密解密服务
加密、解密工具类
1/**////
2 /// 对字符串进行、加解密的工具类
3 ///
4 public class DESEncryptor
5 {
6 静态公共技术#region 静态公共技术
7 /**////
8 /// 对字符串进行加密
9 ///
10 /// 源字符串
11 ///
12 public static string ExecEncrypt(string strSource)
13 {
14 DESEncryptor desEncryptor = new DESEncryptor() ;
15 desEncryptor.InputString = strSource ;
16 desEncryptor.DesEncrypt() ;
17 return desEncryptor.OutString ;
18 }
19 /**////
20 /// 对已经加密的字符串进行解密
21 ///
22 /// 已经加密的字符串
23 ///
24 public static string ExecDeEncrypt(string strSource)
25 {
26 DESEncryptor desEncryptor = new DESEncryptor() ;
27 desEncryptor.InputString = strSource ;
28 desEncryptor.DesDecrypt() ;
29 return desEncryptor.OutString ;
30 }
31 #endregion
32
33 私有成员#region 私有成员
34 /**////
35 /// 输入字符串
36 ///
37 private string inputString=null;
38 /**////
39 /// 输出字符串
40 ///
41 private string outString=null;
42 /**////
43 /// 输入文件路径
44 ///
45 private string inputFilePath=null;
46 /**////
47 /// 输出文件路径
48 ///
49 private string outFilePath=null;
50 /**////
51 /// 加密密钥
52 ///
53 private string encryptKey="fanmenglife";
54 /**////
55 /// 解密密钥
56 ///
57 private string decryptKey = "fanmenglife";
58 /**////
59 /// 提示信息
60 ///
61 private string noteMessage=null;
62 #endregion
63
64 公共属性#region 公共属性
65 /**////
66 /// 输入字符串
67 ///
68 public string InputString
69 {
70 get{return inputString;}
71 set{inputString=value;}
72 }
73 /**////
74 /// 输出字符串
75 ///
76 public string OutString
77 {
78 get{return outString;}
79 set{outString=value;}
80 }
81 /**////
82 /// 输入文件路径
83 ///
84 public string InputFilePath
85 {
86 get{return inputFilePath;}
87 set{inputFilePath=value;}
88 }
89 /**////
90 /// 输出文件路径
91 ///
92 public string OutFilePath
93 {
94 get{return outFilePath;}
95 set{outFilePath=value;}
96 }
97 /**////
98 /// 加密密钥
99 ///
100 public string EncryptKey
101 {
102 get{return encryptKey;}
103 set{encryptKey=value;}
104 }
105 /**////
106 /// 解密密钥
107 ///
108 public string DecryptKey
109 {
110 get{return decryptKey;}
111 set{decryptKey=value;}
112 }
113 /**////
114 /// 错误信息
115 ///
116 public string NoteMessage
117 {
118 get{return noteMessage;}
119 set{noteMessage=value;}
120 }
121 &nb
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