/// <summary>
/// Looks through the uninstall keys in the registry to see if a certain piece of software is installed.
/// </summary>
/// <param name="name">The software to look for.</param>
/// <param name="comparer">How to search for the software.</param>
/// <returns>True if the software is found, else false.</returns>
public static bool FindSoftware(string name, RegistryComparer comparer)
{
if (string.IsNullOrEmpty(name))
{
return(false);
}
//Current User
var uninstallKeys = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer))
{
return(true);
}
//x86 Registry
uninstallKeys = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer))
{
return(true);
}
//x64 Registry
uninstallKeys = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer))
{
return(true);
}
return(false);
}
public static bool FindKey(RegistryKey root, string key, RegistryComparer comparer)
{
if (!string.IsNullOrEmpty(key) && root != null)
{
try
{
Func <string, string, bool> compare;
if (comparer == RegistryComparer.Contains)
{
compare = (x, y) => x.Contains(y);
}
else
{
compare = (x, y) => x == y;
}
using (root)
{
var keyFound = root.GetSubKeyNames()
.Select(root.OpenSubKey)
.Where(x => x != null)
.Select(x => Convert.ToString(x.GetValue("DisplayName"), CultureInfo.CurrentCulture))
.Any(x => !string.IsNullOrEmpty(x) && compare(x, key));
if (keyFound)
{
return(true);
}
}
}
catch
{
return(false);
}
}
return(false);
}
public static bool FindKey(RegistryKey root, string key, RegistryComparer comparer)
{
if (!string.IsNullOrEmpty(key) && root != null)
{
try
{
Func<string, string, bool> compare;
if (comparer == RegistryComparer.Contains)
{
compare = (x, y) => x.Contains(y);
}
else
{
compare = (x, y) => x == y;
}
using (root)
{
var keyFound = root.GetSubKeyNames()
.Select(root.OpenSubKey)
.Where(x => x != null)
.Select(x => Convert.ToString(x.GetValue("DisplayName"), CultureInfo.CurrentCulture))
.Any(x => !string.IsNullOrEmpty(x) && compare(x, key));
if (keyFound)
return true;
}
}
catch
{
return false;
}
}
return false;
}
/// <summary>
/// Looks through the uninstall keys in the registry to see if a certain piece of software is installed.
/// </summary>
/// <param name="name">The software to look for.</param>
/// <param name="comparer">How to search for the software.</param>
/// <returns>True if the software is found, else false.</returns>
public static bool FindSoftware(string name, RegistryComparer comparer)
{
if (string.IsNullOrEmpty(name))
return false;
//Current User
var uninstallKeys = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer)) return true;
//x86 Registry
uninstallKeys = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer)) return true;
//x64 Registry
uninstallKeys = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall");
if (FindKey(uninstallKeys, name, comparer)) return true;
return false;
}
