弥补学生时代的遗憾~C#注册表情缘
记得当时刚接触C#的时候，喜欢编写各种小软件，而注册表系列和网络系列被当时的我认为大牛的必备技能。直到我研究注册表前一天我都感觉他是那么的高深。
今天正好有空，于是就研究了下注册表系列的操作，也随手封装了一个注册表帮助类。简单记一下，当饭后娱乐
完整Demo研究：https://github.com/dunitian/LoTCodeBase/tree/master/NetCode/0.知识拓展/02.注册表系
这个是一些常用的方法和属性（不全，只是列出了比较常用的一些）【OpenSubKey(string name,bool b)当b为true则表示开了可写权限】
//RegistryKey
//属性：
// ValueCount 检索项中值的计数
// SubKeyCount 获取子项个数//方法：
// OpenSubKey(string name,bool b) 获取子项 RegistryKey，b为true时代表可写
// GetSubKeyNames() 获取所有子项名称的字符串数组
// GetValueNames() 检索包含与此项关联的所有值名称的字符串数组
// GetValue(string name) 获取指定名称,不存在名称/值对，则返回 null
// CreateSubKey(string subkey) 创建或者打开子项的名称或路径
// SetValue(string name,object value) 创建或者打开子项的名称或路径
// DeleteSubKeyTree(string subkey) 递归删除指定目录，不存在则抛异常
// DeleteSubKey(string subkey,bool b) 删除子项，b为false则当子项不存在时不抛异常
// DeleteValue(string name,bool b) 删除指定的键值，b为false则当子项不存在时不抛异常
先举个简单的案例：
代码如下：
//获取一个表示HKLM键的RegistryKey
RegistryKey rk = Registry.LocalMachine;
//打开HKLM的子项Software
RegistryKey subKey = rk.OpenSubKey(@"software");
//遍历所有子项名称的字符串数组
foreach (var item in subKey.GetSubKeyNames())
{
//以只读方式检索子项
RegistryKey sonKey = subKey.OpenSubKey(item);
rtxt.AppendText(string.Format("\n--->{0}<---\nSubKeyCount：{1} ValueCount：{2} FullName：{3}\n==================================\n", item, sonKey.SubKeyCount, sonKey.ValueCount, sonKey.Name));
//检索包含与此项关联的所有值名称的字符串数组
foreach (var name in sonKey.GetValueNames())
{
rtxt.AppendText(string.Format("Name：{0} Value：{1} Type：{2}\n", name, sonKey.GetValue(name), sonKey.GetValueKind(name)));
}
}
做个综合的案例：
代码如下：
public partial class MainForm : Form
{
public RegistryKey Reg { get; set; }
public MainForm()
{
InitializeComponent();
//初始化
var rootReg = Registry.LocalMachine;
Reg = rootReg.OpenSubKey("software", true);//开权限
}
#region 公用方法
/// <summary>
/// 检验是否为空
/// </summary>
/// <param name="dntReg"></param>
private bool KeyIsNull(RegistryKey dntReg)
{
if (dntReg == null)
{
rtxt.AppendText("注册表中没有dnt注册项\n");
return true;
}
return false;
}
/// <summary>
/// 遍历Key的Value
/// </summary>
/// <param name="reg"></param>
private void ForeachRegKeys(RegistryKey reg)
{
rtxt.AppendText(string.Format("\n SubKeyCount：{0} ValueCount：{1} FullName：{2}\n", reg.SubKeyCount, reg.ValueCount, reg.Name));
foreach (var name in reg.GetValueNames())
{
rtxt.AppendText(string.Format("Name：{0} Value：{1} Type：{2}\n", name, reg.GetValue(name), reg.GetValueKind(name)));
}
}
#endregion
//查
private void btn1_Click(object sender, EventArgs e)
{
var dntReg = Reg.OpenSubKey("dnt");
if (KeyIsNull(dntReg)) return;
ForeachRegKeys(dntReg);
foreach (var item in dntReg.GetSubKeyNames())
{
//以只读方式检索子项
RegistryKey sonKey = dntReg.OpenSubKey(item);
ForeachRegKeys(sonKey);
}
}
//增
private void btn2_Click(object sender, EventArgs e)
{
var dntReg = Reg.CreateSubKey("dnt");
dntReg.SetValue("web", "http://www.dkill.net");
var sonReg = dntReg.CreateSubKey("path");
sonReg.SetValue("value", "D:\\Program Files\\dnt");
rtxt.AppendText("添加成功\n");
}
//改
private void btn3_Click(object sender, EventArgs e)
{
var dntReg = Reg.OpenSubKey("dnt", true);
if (KeyIsNull(dntReg)) return;
dntReg.SetValue("web", "http://dnt.dkill.net");
rtxt.AppendText("修改成功\n");
}
//删
private void btn4_Click(object sender, EventArgs e)
{
try
{
#region 删除某个值
//var dntReg = Reg.OpenSubKey("dnt", true);
//if (KeyIsNull(dntReg)) return;
//dntReg.DeleteValue("web", false);
#endregion
Reg.DeleteSubKeyTree("dnt", false);
rtxt.AppendText("删除成功\n");
}
catch (ArgumentException ex)
{
rtxt.AppendText(ex.ToString());
}
}
private void clearlog_Click(object sender, EventArgs e)
{
rtxt.Clear();
}
}
Helper类综合实战：（有其他演示，有的电脑会出现权限问题）
using Microsoft.Win32;
using System.Collections.Generic;
public static partial class RegistryHelper
{
#region 节点
/// <summary>
/// HKEY_LOCAL_MACHINE 节点
/// </summary>
public static RegistryKey RootReg = Registry.LocalMachine;
/// <summary>
/// HKEY_LOCAL_MACHINE 下 Software 节点
/// </summary>
public static RegistryKey SoftReg = Registry.LocalMachine.OpenSubKey("software", true);
/// <summary>
/// 包含有关当前用户首选项的信息。该字段读取 Windows 注册表基项 HKEY_CURRENT_USER
/// </summary>
public static RegistryKey CurrentUser = Registry.CurrentUser;
/// <summary>
/// HKEY_CURRENT_USER 下 Software 节点
/// </summary>
public static RegistryKey UserSoftReg = Registry.CurrentUser.OpenSubKey("software", true);
#endregion
#region 查询
/// <summary>
/// 根据名称查找Key，有则返回RegistryKey对象，没有则返回null
/// </summary>
/// <param name="name">要打开的子项的名称或路径</param>
/// <param name="b">如果不需要写入权限请选择false</param>
/// <returns></returns>
public static RegistryKey FindKey(this RegistryKey reg, string name, bool b = true)
{
return reg.OpenSubKey(name, b);
}
/// <summary>
/// 获取（name，value）字典，没有则返回null
/// </summary>
/// <param name="reg">当前RegistryKey</param>
/// <returns></returns>
public static IDictionary<string, object> GetKeyValueDic(this RegistryKey reg)
{
var dic = new Dictionary<string, object>();
if (reg.ValueCount == 0) { return null; }
ForeachRegKeys(reg, ref dic);
return dic;
}
/// <summary>
/// 获取子项（name，value）字典，没有则返回null
/// </summary>
/// <param name="reg">当前RegistryKey</param>
/// <returns></returns>
public static IDictionary<string, object> GetSubKeyValueDic(this RegistryKey reg)
{
var dic = new Dictionary<string, object>();
if (reg.SubKeyCount == 0) { return null; }
foreach (var item in reg.GetSubKeyNames())
{
//以只读方式检索子项
var sonKey = reg.OpenSubKey(item);
ForeachRegKeys(sonKey, ref dic);
}
return dic;
}
/// <summary>
/// 遍历RegistryKey
/// </summary>
/// <param name="reg"></param>
/// <param name="dic"></param>
private static void ForeachRegKeys(RegistryKey reg, ref Dictionary<string, object> dic)
{
foreach (var name in reg.GetValueNames())
{
dic.Add(name, reg.GetValue(name));
}
}
#endregion
#region 添加
/// <summary>
/// 添加一个子项
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static RegistryKey AddSubItem(this RegistryKey reg, string name)
{
return reg.CreateSubKey(name);
}
/// <summary>
/// 添加key-value，异常则RegistryKey对象返回null
/// </summary>
/// <param name="reg"></param>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns></returns>
public static RegistryKey AddKeyValue(this RegistryKey reg, string key, object value)
{
reg.SetValue(key, value);
return reg;
}
#endregion
#region 修改
/// <summary>
/// 修改key-value，异常则RegistryKey对象返回null
/// </summary>
/// <param name="reg"></param>
/// <param name="key"></param>
/// <param name="value"></param>
/// <returns></returns>
public static RegistryKey UpdateKeyValue(this RegistryKey reg, string key, object value)
{
return reg.AddKeyValue(key, value);
}
#endregion
#region 删除
/// <summary>
/// 根据Key删除项
/// </summary>
/// <param name="reg"></param>
/// <param name="key"></param>
/// <returns></returns>
public static RegistryKey DeleteKeyValue(this RegistryKey reg, string key)
{
reg.DeleteValue(key, false);
return reg;
}
/// <summary>
/// 删除子项所有内容
/// </summary>
/// <param name="reg"></param>
/// <param name="key"></param>
/// <returns></returns>
public static RegistryKey ClearSubAll(this RegistryKey reg, string key)
{
reg.DeleteSubKeyTree(key, false);
return reg;
}
#endregion
}