C# 获取系统当前IE版本号

1. 注册表中，ie的位置：

计算机\hkey_local_machine\software\wow6432node\microsoft\internet explorer

2. 通过注册表读取ie配置

1     registrykey mainkey = registry.localmachine;
2     registrykey subkey = mainkey.opensubkey(@"software\microsoft\internet explorer");

3. 读取ie的版本号

 1     var versionnumber = string.empty;
 2     if (subkey?.getvalue("svcversion") is string svcversion)
 3     {
 4         versionnumber = svcversion;
 5         if (string.isnullorwhitespace(versionnumber) && subkey.getvalue("svcupdateversion") is string svcupdateversion)
 6         {
 7             versionnumber = svcupdateversion;
 8             if (string.isnullorwhitespace(versionnumber) && subkey.getvalue("version") is string version)
 9             {
10                 versionnumber = version;
11             }
12         }
13     }

4. 获取主版本号（8/9/10 etc.）

 1     /// <summary>
 2     /// 获取ie主版本号
 3     /// </summary>
 4     /// <returns></returns>
 5     public static string getmajorversion()
 6     {
 7         var majorversion = string.empty;
 8 
 9         var detailversion = getdetailversion();
10         if (!string.isnullorwhitespace(detailversion))
11         {
12             if (detailversion.indexof(".", stringcomparison.ordinal) is int connectedcharfirstindex && connectedcharfirstindex > -1)
13             {
14                 majorversion = detailversion.substring(0, connectedcharfirstindex);
15             }
16             else
17             {
18                 majorversion = detailversion;
19             }
20         }
21 
22         return majorversion;
23     }
24 
25     /// <summary>
26     /// 获取ie详细版本号
27     /// </summary>
28     /// <returns></returns>
29     public static string getdetailversion()
30     {
31         //通过webbrowser方案获取版本号
32         //int mainver = (new webbrowser()).version.major;
33 
34         //通过注册表获取用户ie版本号
35         registrykey mainkey = registry.localmachine;
36         registrykey subkey = mainkey.opensubkey(@"software\microsoft\internet explorer");
37 
38         var versionnumber = string.empty;
39         if (subkey?.getvalue("svcversion") is string svcversion)
40         {
41             versionnumber = svcversion;
42             if (string.isnullorwhitespace(versionnumber) && subkey.getvalue("svcupdateversion") is string svcupdateversion)
43             {
44                 versionnumber = svcupdateversion;
45                 if (string.isnullorwhitespace(versionnumber) && subkey.getvalue("version") is string version)
46                 {
47                     versionnumber = version;
48                 }
49             }
50         }
51         return versionnumber;
52     }