C#操作注册表的方法

2007-03-09 00:00:00 作者：

以下从‘读’‘写’‘删除’‘判断’四个事例实现对注册表的简单操作

using Microsoft.Win32 ;

1.读取指定名称的注册表的值

private string GetRegistData(string name) 
{ 
string registData; 
RegistryKey hkml = Registry.LocalMachine; 
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
RegistryKey aimdir = software.OpenSubKey("XXX",true); 
registData = aimdir.GetValue(name).ToString(); 
return registData; 
} 

以上是读取的注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下的XXX目录中名称为name的注册表值；

2.向注册表中写数据

复制代码代码如下:

private void WTRegedit(string name,string tovalue) 
{ 
RegistryKey hklm = Registry.LocalMachine; 
RegistryKey software = hklm.OpenSubKey("SOFTWARE",true); 
RegistryKey aimdir = software.CreateSubKey("XXX"); 
aimdir.SetValue(name,tovalue); 
}

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下新建XXX目录并在此目录下创建名称为name值为tovalue的注册表项；

3.删除注册表中指定的注册表项

复制代码代码如下:

private void DeleteRegist(string name) 
{ 
string[] aimnames; 
RegistryKey hkml = Registry.LocalMachine; 
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
RegistryKey aimdir = software.OpenSubKey("XXX",true); 
aimnames = aimdir.GetSubKeyNames(); 
foreach(string aimKey in aimnames) 
{ 
if(aimKey == name) 
aimdir.DeleteSubKeyTree(name); 
} 
} 

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中删除名称为name注册表项；

4.判断指定注册表项是否存在

复制代码代码如下:

private bool IsRegeditExit(string name) 
{ 
bool _exit = false; 
string[] subkeyNames; 
RegistryKey hkml = Registry.LocalMachine; 
RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 
RegistryKey aimdir = software.OpenSubKey("XXX",true); 
subkeyNames = aimdir.GetSubKeyNames(); 
foreach(string keyName in subkeyNames) 
{ 
if(keyName == name) 
{ 
_exit = true; 
return _exit; 
} 
} 
return _exit; 
}

以上是在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中判断名称为name注册表项是否存在，这一方法在删除注册表时已经存在，在新建一注册表项时也应有相应判断；

复制代码代码如下:

using System.Windows.Forms;
using Microsoft.Win32;

namespace RegeditManager
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //创建并写入
        private void button1_Click(object sender, EventArgs e)
        {
            RegistryKey key = Registry.LocalMachine;
            try
            {
                RegistryKey software = key.CreateSubKey("software\\LabManager");
                software = key.OpenSubKey("software\\LabManager", true);
                software.SetValue("Address", @"C:\Program Files\实验室管理系统\dbcom.xml");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }
        //读取
        private void button2_Click(object sender, EventArgs e)
        {
            string info = string.Empty;
            RegistryKey key=Registry.LocalMachine;
            try
            {
                key = key.OpenSubKey("software\\LabManager");
                if (IsRegeditKeyExit("software\\LabManager", "Address"))
                {
                    info = key.GetValue("Address").ToString();
                    MessageBox.Show("注册表里的信息为:" + info);
                }
                else
                {
                    MessageBox.Show("键值Address不存在;");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }
        //删除
        private void button3_Click(object sender, EventArgs e)
        {
            RegistryKey key = Registry.LocalMachine;
            try
            {
                key = key.OpenSubKey("software\\LabManager",true);
                if (IsRegeditKeyExit("software\\LabManager", "Address"))
                {
                    key.DeleteValue("Address");
                    MessageBox.Show("删除成功");
                }
                else
                {
                    MessageBox.Show("键值Address不存在;");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                key.Close();
            }
        }

        /// <summary>
        /// 判断键值是否存在
        /// </summary>
        /// <param name="RegistryStr">注册表项</param>
        /// <param name="KeyStr">键值</param>
        /// <returns></returns>
        private bool IsRegeditKeyExit(string RegistryStr,string KeyStr)
        {
            string[] subkeyNames;

RegistryKey hkml = Registry.LocalMachine;

RegistryKey software = hkml.OpenSubKey(RegistryStr);

subkeyNames = software.GetValueNames();

            foreach (string keyName in subkeyNames)
            {
                if (keyName == KeyStr) //判断键值的名称
                {
                    hkml.Close();

                    return true;
                }
            }
            hkml.Close();

return false;
}

        /// <summary>
        /// 判断注册表项是否存在
        /// </summary>
        /// <param name="RegistryName">例如:SOFTWARE</param>
        /// <param name="ValueStr">例如:LabManager</param>
        /// <returns></returns>
        private bool IsRegeditItemExist(string RegistryName,string ValueStr)
        {
            string[] subkeyNames;

RegistryKey hkml = Registry.LocalMachine;

RegistryKey software = hkml.OpenSubKey(RegistryName);

subkeyNames = software.GetSubKeyNames();

//取得该项下所有子项的名称的序列，并传递给预定的数组中

            foreach (string keyName in subkeyNames) //遍历整个数组
            {
                if (keyName == ValueStr) //判断子项的名称
                {
                    hkml.Close();
                    return true;
                }
            }
            hkml.Close();
            return false;

}
}
}

C#操作注册表的方法

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