Csharp/C Sharp/Development Class/Registry
Содержание
- 1 Accessing the Registry
- 2 Enumerating Registry Keys
- 3 Get Registry value
- 4 Get the Registry key found for CurrentUser
- 5 Open a SubKey in Registry
- 6 Registry.LocalMachine
- 7 Retrieve the CPU Type and Speed from the Registry
- 8 Use GetValue and SetValue to get and save value to Registry
- 9 Write a Text and DWord Value to the Registry
Accessing the Registry
<source lang="csharp"> using System; using Microsoft.Win32; class MainClass {
public static void Main(String[] args) {
RegistryKey rk = Registry.LocalMachine;
RegistryKey subKey =rk.OpenSubKey("HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0\\");
object VendorID = subKey.GetValue("VendorIdentifier");
Console.WriteLine(VendorID);
RegistryKey randkey = Registry.CurrentUser;
string key = "";
for (int i = 0; i < args.Length - 1; ++i) {
key += args[i];
key += "\\";
}
RegistryKey subKey1 = randkey.OpenSubKey(key);
object keyValue = subKey1.GetValue(args[args.Length - 1]);
Console.WriteLine("Key {0} Value {1} = {2}",key,args[args.Length - 1],keyValue);
RegistryKey companyKey = Registry.CurrentUser;
RegistryKey subKey3 = companyKey.CreateSubKey("MyCompany");
subKey3.SetValue("Name", "MyCompany");
subKey3.SetValue("RegistrationID", 1234567);
subKey3.SetValue("Date", "01/01/2001");
companyKey.Close();
RegistryKey companyKeyRead = Registry.CurrentUser;
RegistryKey subKey4 = companyKeyRead.OpenSubKey("MyCompany");
object companyName = subKey4.GetValue("MyCompany");
Console.WriteLine("Company Name: {0}", companyName);
object regID = subKey4.GetValue("RegistrationID");
Console.WriteLine("RegistrationID: {0}", regID);
object theDate = subKey4.GetValue("Date");
Console.WriteLine("Date: {0}", theDate);
}
}
</source>
Enumerating Registry Keys
<source lang="csharp">
using System; using Microsoft.Win32; class Class1 {
static void Main(string[] args) {
RegistryKey myRegKey = Registry.LocalMachine;
myRegKey = myRegKey.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall");
String[] subkeyNames = myRegKey.GetSubKeyNames();
foreach (String s in subkeyNames) {
RegistryKey UninstallKey = Registry.LocalMachine;
UninstallKey = UninstallKey.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\" + s);
try {
Object oValue = UninstallKey.GetValue("DisplayName");
Console.WriteLine(oValue.ToString());
} catch (NullReferenceException) {
}
}
}
}
</source>
Get Registry value
<source lang="csharp"> /* C# Network Programming by Richard Blum Publisher: Sybex ISBN: 0782141765
- /
using System; using Microsoft.Win32; public class CardGrab {
public static void Main()
{
RegistryKey start = Registry.LocalMachine;
RegistryKey cardServiceName, networkKey;
string networkcardKey = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards";
string serviceKey = "SYSTEM\\CurrentControlSet\\Services\\";
string networkcardKeyName, deviceName, deviceServiceName, serviceName;
RegistryKey serviceNames = start.OpenSubKey(networkcardKey);
if (serviceNames == null)
{
Console.WriteLine("Bad registry key");
return;
}
string[] networkCards = serviceNames.GetSubKeyNames();
serviceNames.Close();
foreach(string keyName in networkCards)
{
networkcardKeyName = networkcardKey + "\\" + keyName;
cardServiceName = start.OpenSubKey(networkcardKeyName);
if (cardServiceName == null)
{
Console.WriteLine("Bad registry key: {0}", networkcardKeyName);
return;
}
deviceServiceName = (string)cardServiceName.GetValue("ServiceName");
deviceName = (string)cardServiceName.GetValue("Description");
Console.WriteLine("\nNetwork card: {0}", deviceName);
serviceName = serviceKey + deviceServiceName +
"\\Parameters\\Tcpip";
networkKey = start.OpenSubKey(serviceName);
if (networkKey == null)
{
Console.WriteLine(" No IP configuration set");
} else
{
string[] ipaddresses = (string[])networkKey.GetValue("IPAddress");
string[] defaultGateways = (string[])networkKey.GetValue("DefaultGateway");
string[] subnetmasks = (string[])networkKey.GetValue("SubnetMask");
foreach(string ipaddress in ipaddresses)
{
Console.WriteLine(" IP Address: {0}", ipaddress);
}
foreach(string subnetmask in subnetmasks)
{
Console.WriteLine(" Subnet Mask: {0}", subnetmask);
}
foreach(string defaultGateway in defaultGateways)
{
Console.WriteLine(" Gateway: {0}", defaultGateway);
}
networkKey.Close();
}
}
start.Close();
}
}
</source>
Get the Registry key found for CurrentUser
<source lang="csharp"> using System; using Microsoft.Win32;
class MainClass {
public static void SearchSubKeys(RegistryKey root, String searchKey) {
foreach (string keyname in root.GetSubKeyNames()) {
try {
using (RegistryKey key = root.OpenSubKey(keyname)) {
if (keyname == searchKey) PrintKeyValues(key);
SearchSubKeys(key, searchKey);
}
} catch (System.Security.SecurityException) {
}
}
}
public static void PrintKeyValues(RegistryKey key) {
Console.WriteLine("Registry key found : {0} contains {1} values",
key.Name, key.ValueCount);
foreach (string valuename in key.GetValueNames()) {
if (key.GetValue(valuename) is String) {
Console.WriteLine(" Value : {0} = {1}",
valuename, key.GetValue(valuename));
}
}
}
public static void Main(String[] args) {
if (args.Length > 0) {
using (RegistryKey root = Registry.CurrentUser) {
SearchSubKeys(root, args[0]);
}
}
}
}
</source>
Open a SubKey in Registry
<source lang="csharp">
using System; using Microsoft.Win32;
class MainClass {
public static void SearchSubKeys(RegistryKey root, String searchKey) {
foreach (string keyname in root.GetSubKeyNames()) {
try {
using (RegistryKey key = root.OpenSubKey(keyname)) {
if (keyname == searchKey) PrintKeyValues(key);
SearchSubKeys(key, searchKey);
}
} catch (System.Security.SecurityException) {
}
}
}
public static void PrintKeyValues(RegistryKey key) {
Console.WriteLine("Registry key found : {0} contains {1} values",
key.Name, key.ValueCount);
foreach (string valuename in key.GetValueNames()) {
if (key.GetValue(valuename) is String) {
Console.WriteLine(" Value : {0} = {1}",
valuename, key.GetValue(valuename));
}
}
}
public static void Main(String[] args) {
if (args.Length > 0) {
using (RegistryKey root = Registry.CurrentUser) {
SearchSubKeys(root, args[0]);
}
}
}
}
</source>
Registry.LocalMachine
<source lang="csharp"> using System; using Microsoft.Win32; using System.Security.Permissions; [RegistryPermissionAttribute(SecurityAction.Demand)] class Class1 {
static void Main(string[] args) {
RegistryKey myRegKey = Registry.LocalMachine;
myRegKey = myRegKey.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion");
Object oValue = myRegKey.GetValue("RegisteredOwner");
Console.WriteLine("OS Registered Owner: {0}", oValue.ToString());
}
}
</source>
Retrieve the CPU Type and Speed from the Registry
<source lang="csharp"> using System; using Microsoft.Win32; class Class1 {
static void Main(string[] args) {
RegistryKey RegKey = Registry.LocalMachine;
RegKey = RegKey.OpenSubKey("HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0");
Object cpuSpeed = RegKey.GetValue("~MHz");
Object cpuType = RegKey.GetValue("VendorIdentifier");
Console.WriteLine("You have a {0} running at {1} MHz.", cpuType, cpuSpeed);
}
}
</source>
Use GetValue and SetValue to get and save value to Registry
<source lang="csharp">
using System; using Microsoft.Win32; class MainClass {
public static void Main(String[] args) {
string lastUser;
string lastRun;
int runCount;
lastUser = (string)Registry.GetValue(@"HKEY_CURRENT_USER\Software\A\C#","", "Nobody");
if (lastUser == null) {
lastUser = "Nobody";
lastRun = "Never";
runCount = 0;
} else {
lastRun = (string)Registry.GetValue(@"HKEY_CURRENT_USER\Software\A\C#","LastRun", "Never"); runCount = (Int32)Registry.GetValue(
@"HKEY_CURRENT_USER\Software\A\C#","RunCount", 0);
}
Console.WriteLine("Last user name: " + lastUser);
Console.WriteLine("Last run date/time: " + lastRun);
Console.WriteLine("Previous executions: " + runCount);
Registry.SetValue(@"HKEY_CURRENT_USER\Software\A\C#","", Environment.UserName, RegistryValueKind.String);
Registry.SetValue(@"HKEY_CURRENT_USER\Software\A\C#","LastRun", DateTime.Now.ToString(), RegistryValueKind.String);
Registry.SetValue(@"HKEY_CURRENT_USER\Software\A\C#","RunCount", ++runCount, RegistryValueKind.DWord);
}
}
</source>
Write a Text and DWord Value to the Registry
<source lang="csharp"> using System; using Microsoft.Win32; class Class1 {
static void Main(string[] args) {
RegistryKey RegKeyWrite = Registry.CurrentUser;
RegKeyWrite = RegKeyWrite.CreateSubKey("Software\\CSHARP\\WriteRegistryValue");
RegKeyWrite.SetValue("Success", "TRUE");
RegKeyWrite.SetValue("AttemptNumber", 1);
RegKeyWrite.Close();
RegistryKey RegKeyRead = Registry.CurrentUser;
RegKeyRead = RegKeyRead.OpenSubKey("Software\\CSHARP\\WriteRegistryValue");
Object regSuccessful = RegKeyRead.GetValue("Success");
Object regAttemptNumber = RegKeyRead.GetValue("AttemptNumber");
RegKeyRead.Close();
Console.WriteLine(regSuccessful);
}
}
</source>
