c# - 检查微软组件是否存在

Question

我想检查某些 Microsoft 组件是否像 wmencoder、directx 或 wmplayer是否安装。如果安装了，我也可以得到它的版本号吗？

我该怎么做？

提前致谢。

Answer 1

我使用下面的代码来确定是否安装了其他应用程序，但是您需要知道在注册表中安装该应用程序的“唯一”产品代码(来自 Visual Studio 中的安装项目)。

包含

using System.Diagnostics;
using Microsoft.Win32; 

用法:

// HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{0006F03A-0000-0000-C000-000000000046} << This is outlook 2003
String retval = "";

// Look to see if Outlook 2003 is installed and if it is...
if ((checkComServerExists("{0006F03A-0000-0000-C000-000000000046}", out retval)))
{
    // Update boolean flag if we get this far so we don't have to check again
    Console.WriteLine("Office CSLID exists - Version: " + retval);
}

功能:

// Checks to see if the given CLSID is registerd and exists on the system
private static Boolean checkComServerExists(String CLSID, out String retval)
{
    RegistryKey myRegKey = Registry.LocalMachine;
    Object val;

    try
    {
        // get the pathname to the COM server DLL/EXE if the key exists
        myRegKey = myRegKey.OpenSubKey("SOFTWARE\\Classes\\CLSID\\" + CLSID + "\\LocalServer32");
        val = myRegKey.GetValue(null); // the null gets default
    }
    catch
    {
        retval = "CLSID not registered";
        return false;
    }

    FileVersionInfo myFileVersionInfo = null;
    try
    {
        // parse out the version number embedded in the resource
        // in the DLL
        myFileVersionInfo = FileVersionInfo.GetVersionInfo(val.ToString());
    }
    catch
    {
        retval = String.Format("DLL {0} not found", val.ToString());
        return false;
    }

    retval = myFileVersionInfo.FileVersion;
    return true;
}