C#注册表情缘
Posted 码道安邦
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了C#注册表情缘相关的知识,希望对你有一定的参考价值。
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 }
以上是关于C#注册表情缘的主要内容,如果未能解决你的问题,请参考以下文章
此 Canon SDK C++ 代码片段的等效 C# 代码是啥?