/// <summary>
/// 从卸载程序注册表中获取指定软件名称的版本
/// </summary>
/// <param name="softName">需要指定的软件名称</param>
/// <returns>返回该安装软件的版本</returns>
public string getVersionFromRegistry(string softwareName)
{
//32位机子下 从此方法中读取
string version = string.Empty;
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
RegistryKey subkey = null;
string displayName = string.Empty;
foreach (String keyName in key.GetSubKeyNames())
{
subkey = key.OpenSubKey(keyName);
displayName = subkey.GetValue("DisplayName") as string;
if (string.IsNullOrEmpty(displayName))
continue;
if (softwareName.Equals(displayName, StringComparison.OrdinalIgnoreCase))
{
version = subkey.GetValue("DisplayVersion") as string;
break;
}
}
if (!string.IsNullOrEmpty(version))
return version;
if (Environment.Is64BitOperatingSystem && string.IsNullOrEmpty(version))
{
//操作系统为64位机子,则使用SafeRegistryHandle方法读取注册表值
version = GetValueWithRegView(RegistryHive.LocalMachine, @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", softwareName, RegistryView.Registry64);
return version;
}
return string.Empty;
}
/// <summary>
/// 用于32位程序访问64位注册表
/// </summary>
/// <param name="hive">根级别的名称</param>
/// <param name="keyName">不包括根级别的名称</param>
/// <param name="valueName">项名称</param>
/// <param name="view">注册表视图</param>
/// <returns>值</returns>
private string GetValueWithRegView(RegistryHive hive, string keyName,string softwareName, RegistryView view)
{
//获得根节点的安全句柄
SafeRegistryHandle handle = new SafeRegistryHandle(GetHiveHandle(hive), true);
//获得要访问的键
RegistryKey subkey = RegistryKey.FromHandle(handle, view).OpenSubKey(keyName);
//根据键的句柄和视图获得要访问的键
RegistryKey key = RegistryKey.FromHandle(subkey.Handle, view);
//获得键下指定项的值
//return key.GetValue(valueName);
string[] subKeyArray = key.GetSubKeyNames();
if (subKeyArray == null || subKeyArray.Length <= 0)
return string.Empty;
string displayName = string.Empty; string version = string.Empty;
foreach (string subkeyName in subKeyArray)
{
subkey = key.OpenSubKey(subkeyName);
displayName = subkey.GetValue("DisplayName") as string;
if (string.IsNullOrEmpty(displayName))
continue;
if (softwareName.Equals(displayName, StringComparison.OrdinalIgnoreCase))
{
version = subkey.GetValue("DisplayVersion") as string;
break;
}
}
return version;
}
/// <summary>
/// 用于32位的程序设置64位的注册表
/// </summary>
/// <param name="hive">根级别的名称</param>
/// <param name="keyName">不包括根级别的名称</param>
/// <param name="valueName">项名称</param>
/// <param name="value">值</param>
/// <param name="kind">值类型</param>
/// <param name="view">注册表视图</param>
private void SetValueWithRegView(RegistryHive hive, string keyName, string valueName, object value, RegistryValueKind kind, RegistryView view)
{
//获得根节点的安全句柄
SafeRegistryHandle handle = new SafeRegistryHandle(GetHiveHandle(hive), true);
//需要写的权限,这里的true是关键。0227更新
RegistryKey subkey = RegistryKey.FromHandle(handle, view).OpenSubKey(keyName, true);
//根据键的句柄和视图获得要访问的键
RegistryKey key = RegistryKey.FromHandle(subkey.Handle, view);
//获得键下指定项的值
key.SetValue(valueName, value, kind);
}
/// <summary>
/// 获取操作句柄
/// </summary>
/// <param name="hive">枚举注册表上顶级节点的值</param>
/// <returns>返回操作句柄</returns>
private IntPtr GetHiveHandle(RegistryHive hive)
{
IntPtr preexistingHandle = IntPtr.Zero;
IntPtr HKEY_CLASSES_ROOT = new IntPtr(-2147483648);
IntPtr HKEY_CURRENT_USER = new IntPtr(-2147483647);
IntPtr HKEY_LOCAL_MACHINE = new IntPtr(-2147483646);
IntPtr HKEY_USERS = new IntPtr(-2147483645);
IntPtr HKEY_PERFORMANCE_DATA = new IntPtr(-2147483644);
IntPtr HKEY_CURRENT_CONFIG = new IntPtr(-2147483643);
IntPtr HKEY_DYN_DATA = new IntPtr(-2147483642);
switch (hive)
{
case RegistryHive.ClassesRoot:
preexistingHandle = HKEY_CLASSES_ROOT; break;
case RegistryHive.CurrentUser:
preexistingHandle = HKEY_CURRENT_USER; break;
case RegistryHive.LocalMachine:
preexistingHandle = HKEY_LOCAL_MACHINE; break;
case RegistryHive.Users:
preexistingHandle = HKEY_USERS; break;
case RegistryHive.PerformanceData:
preexistingHandle = HKEY_PERFORMANCE_DATA; break;
case RegistryHive.CurrentConfig:
preexistingHandle = HKEY_CURRENT_CONFIG; break;
case RegistryHive.DynData:
preexistingHandle = HKEY_DYN_DATA; break;
}
return preexistingHandle;
}
从卸载程序需注册表中读取指定软件名称的版本
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转载自blog.csdn.net/fuweiping/article/details/51017919
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