C# 獲取系統當前IE版本號

1. 註冊表中，IE的位置：

電腦\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer

2. 通過註冊表讀取IE配置

1     RegistryKey mainKey = Registry.LocalMachine;
2     RegistryKey subKey = mainKey.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer");

3. 讀取IE的版本號

 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. 獲取主版本號（8/9/10 etc.）

 1     /// <summary>
 2     /// 獲取IE主版本號
 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     /// 獲取IE詳細版本號
27     /// </summary>
28     /// <returns></returns>
29     public static string GetDetailVersion()
30     {
31         //通過WebBrowser方案獲取版本號
32         //int mainVer = (new WebBrowser()).Version.Major;
33 
34         //通過註冊表獲取用戶IE版本號
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     }