C#對註冊表的操作

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一、引入命名空間：

using Microsoft.Win32;

 

二、建立登錄機碼：CreateSubKey（name）方法

添加SubKey時候首先要開啟一個表項，並設定參數為true，才能成功建立子項

//給要建立的註冊表設定一個變數，使用更方便
private string RegistFileName = "test";

/// <summary>/// 建立一個test登錄機碼,下麵包含OpenLog，和SaveLog兩個子項/// </summary>private void CreateRegistFile(){
　　//SOFTWARE在LocalMachine分支下
    RegistryKey key = Registry.LocalMachine.OpenSubKey("SOFTWARE",true);    RegistryKey software = key.CreateSubKey(RegistFileName);    RegistryKey test = key.OpenSubKey(RegistFileName,true);    RegistryKey Savekey = test.CreateSubKey("SaveLog");}

 

三、刪除登錄機碼：DeleteSubKey（name，true）方法

RegistryKey key = Registry.LocalMachine;RegistryKey software = key.OpenSubKey("SOFTWARE", true);RegistryKey test = software.OpenSubKey(RegistFileName, true);test.DeleteSubKey("SaveLog",true); 

 

四、添加索引值：SetValue（name,value）方法

/// <summary>/// 將path寫入OPenLog子項/// </summary>private void writeToRegistFile(string path){
　　RegistryKey key = Registry.LocalMachine;
　　RegistryKey software = key.OpenSubKey("SOFTWARE", true);
　　RegistryKey test = software.OpenSubKey(RegistFileName, true);
　　RegistryKey OpenPath = test.OpenSubKey("OpenLog",true);
　　//"name"是該索引值的name，相當於一個別名，可自行設定
　　OpenPath.SetValue("name", path);}

 

五、刪除索引值：DeleteValue（name）方法

RegistryKey key = Registry.LocalMachine;RegistryKey software = key.OpenSubKey("SOFTWARE", true);RegistryKey test = software.OpenSubKey(RegistFileName, true);
RegistryKey OpenPath = test.OpenSubKey("SaveLog",true);
//刪除SaveLog子項下的名為SaveLog的子鍵
OpenPath.DeleteValue("name");

 

六、判斷登錄機碼是否存在：

/// <summary>/// 判斷登錄機碼是否存在/// </summary>/// <returns>bool</returns>private bool IsRegeditItemExist(){　　string[] subkeyNames;　　RegistryKey key = Registry.LocalMachine;　　RegistryKey software = key.OpenSubKey("SOFTWARE");　　subkeyNames = software.GetSubKeyNames();　　//在這裡我是判斷test表項是否存在　　foreach (string keyName in subkeyNames)　　{　　　　if (keyName == RegistFileName)　　　　{　　　　　　key.Close();　　　　　　return true;　　　　}　　}　　key.Close();　　return false;}

 

七、判斷索引值是否存在：

/// <summary>/// 判斷該路徑是否已經存在/// </summary>/// <param name="path">路徑</param>/// <returns></returns>private bool IsRegeditKeyExit(string name){string[] saveSubkeyNames;    RegistryKey key = Registry.LocalMachine;    RegistryKey software = key.OpenSubKey("SOFTWARE", true);    RegistryKey test = software.OpenSubKey(RegistFileName, true);    RegistryKey Savekey = test.OpenSubKey("SaveLog", true);
　　//擷取該子項下的所有索引值的名稱saveSubkeyNames     saveSubkeyNames = Savekey.GetSubKeyNames();foreach(string keyName in openSubkeyNames)    {        if(keyName == name)        {            key.Close();            return false;        }    }    key.Close();    return true;}

C#對註冊表的操作