如果当前操作系统上安装了.net framework 4.5.X,我需要检测什么?
我尝试this但似乎仅限于使用非官方更新的框架4.0。
答案 0 :(得分:3)
刚刚为您进行了Google搜索,并发现以下MSDN文章直接引用了您的问题。包括4.5及更高版本的示例...
https://msdn.microsoft.com/en-us/library/hh925568(v=vs.110).aspx
答案 1 :(得分:2)
您可以查看注册表或只是签入已安装的程序。 在“开始”菜单上,键入" appwiz.cpl",然后搜索.net 您将在计算机上看到所有.net。
答案 2 :(得分:0)
// Checking the version using >= will enable forward compatibility,
// however you should always compile your code on newer versions of
// the framework to ensure your app works the same.
private static string CheckFor45DotVersion(int releaseKey)
{
if (releaseKey >= 393295) {
return "4.6 or later";
}
if ((releaseKey >= 379893)) {
return "4.5.2 or later";
}
if ((releaseKey >= 378675)) {
return "4.5.1 or later";
}
if ((releaseKey >= 378389)) {
return "4.5 or later";
}
// This line should never execute. A non-null release key should mean
// that 4.5 or later is installed.
return "No 4.5 or later version detected";
}
private static void Get45or451FromRegistry()
{
using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey("SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v4\\Full\\")) {
if (ndpKey != null && ndpKey.GetValue("Release") != null) {
Console.WriteLine("Version: " + CheckFor45DotVersion((int) ndpKey.GetValue("Release")));
}
else {
Console.WriteLine("Version 4.5 or later is not detected.");
}
}
}