前言:
使用Windows系統,經常會遇到需要做登錄檔的操作。例如,一些軟體需要修改登錄檔、自己編寫的軟體需要新建登錄檔進行寫入註冊資訊等等。以下內容以某常見的資料庫操作客戶端為例,做一個登錄檔操作的學習。
1、例如,找一個已經登錄檔過期的軟體,記錄一下時間和當前過期的效果。
2、參考C#操作登錄檔官方文件:
3、官方示例程式碼:
using System;
using System.Security.Permissions;
using Microsoft.Win32;
class RegKey
{
static void Main()
{
// Create a subkey named Test9999 under HKEY_CURRENT_USER.
RegistryKey test9999 =
Registry.CurrentUser.CreateSubKey("Test9999");
// Create two subkeys under HKEY_CURRENT_USER\Test9999. The
// keys are disposed when execution exits the using statement.
using(RegistryKey
testName = test9999.CreateSubKey("TestName"),
testSettings = test9999.CreateSubKey("TestSettings"))
{
// Create data for the TestSettings subkey.
testSettings.SetValue("Language", "French");
testSettings.SetValue("Level", "Intermediate");
testSettings.SetValue("ID", 123);
}
// Print the information from the Test9999 subkey.
Console.WriteLine("There are {0} subkeys under {1}.",
test9999.SubKeyCount.ToString(), test9999.Name);
foreach(string subKeyName in test9999.GetSubKeyNames())
{
using(RegistryKey
tempKey = test9999.OpenSubKey(subKeyName))
{
Console.WriteLine("\nThere are {0} values for {1}.",
tempKey.ValueCount.ToString(), tempKey.Name);
foreach(string valueName in tempKey.GetValueNames())
{
Console.WriteLine("{0,-8}: {1}", valueName,
tempKey.GetValue(valueName).ToString());
}
}
}
using(RegistryKey
testSettings = test9999.OpenSubKey("TestSettings", true))
{
// Delete the ID value.
testSettings.DeleteValue("id");
// Verify the deletion.
Console.WriteLine((string)testSettings.GetValue(
"id", "ID not found."));
}
// Delete or close the new subkey.
Console.Write("\nDelete newly created registry key? (Y/N) ");
if(Char.ToUpper(Convert.ToChar(Console.Read())) == 'Y')
{
Registry.CurrentUser.DeleteSubKeyTree("Test9999");
Console.WriteLine("\nRegistry key {0} deleted.",
test9999.Name);
}
else
{
Console.WriteLine("\nRegistry key {0} closed.",
test9999.ToString());
test9999.Close();
}
}
}
4、做一個測試清理Navicat登錄檔的demo,當作學習使用。
核心程式碼:
RegistryKey regKey = Registry.CurrentUser;
RegistryKey regKey2 = regKey.OpenSubKey(@"Software\Classes\CLSID",true);
string[] keyNameColl;
keyNameColl = regKey2.GetSubKeyNames();
List<string> keyNames = new List<string>();
foreach (string key in keyNameColl) {
var subKeys = regKey2.OpenSubKey(key,true);
var subKeyNames = subKeys.GetSubKeyNames();
if(subKeyNames!=null && subKeyNames.Length==1 && subKeyNames[0] == "Info")
{
keyNames.Add(key);
}
subKeys?.Close();
}
foreach (var key in keyNames) {
regKey2.DeleteSubKeyTree(key,false);
Console.WriteLine($"[HKEY_CURRENT_USER\\Software\\Classes\\CLSID\\{key}]");
}
regKey2.Close();
regKey.Close();
5、寫好程式碼以後,編譯成功即可使用。
6、執行完畢以後,進行重寫開啟Navicat15驗證下,發現試用期被重置了,說明登錄檔操作是成功的。
【警告】該操作僅用於學習用途,旨在幫助大家熟悉使用C#進行登錄檔的操作,嚴禁用於其他非法用途。