using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace WindowsForms设置系统变量
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
//var str = SysEnvironment.GetSysEnvironmentByName("Path"); //系统变量 Path
// SysEnvironment.SetSysEnvironment("Path", "0");
//HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\Environment 下的Path值
SysEnvironment.SetPathAfter(@"C:\mysql\bin");
MessageBox.Show("完成!" + @"C:\mysql\bin;");
var str = SysEnvironment.GetSysEnvironmentByName("Path"); //系统变量 Path
string[] temp = str.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < temp.Length; i++)
{
textBox1.Text += temp[i] + "\r\n";
}
}
private void button2_Click(object sender, EventArgs e)
{
////RunCmd(@"C:\Windows\System32\","ipconfig");
//System.Diagnostics.Process.Start(@"C:\Windows\System32\cmd.exe");
//textBox2.Text += Cmd(@"CD C:\mysql mysqld --defaults-file=my.ini --initialize-insecure");
}
///<summary>
/// cmd命令执行，在cmd上可以执行的语句，直接传到这里，调用grads画图实例如下：
/// Cmd("C:/OpenGrADS/Contents/Cygwin/Versions/2.0.1.oga.1/i686/grads.exe -lbcx 'D:/data_wrfchem/gs/d01_hour_pm25.gs D:/data_wrfchem 2016-04-18 d01'");
/// Cmd("grads启动程序exe路径 -lbcx 'gs脚本文件 参数1 参数2 参数3'");
/// </summary>
/// <param name="c">执行语句</param>
public string Cmd(string c)
{
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.Start();
process.StandardInput.WriteLine(c);
process.StandardInput.AutoFlush = true;
process.StandardInput.WriteLine("exit");
StreamReader reader = process.StandardOutput;//截取输出流
//string output = reader.ReadLine();//每次读取一行
//while (!reader.EndOfStream)
//{
// // PrintThrendInfo(output);
// output = reader.ReadLine();
//}
string output = reader.ReadToEnd();//每次读取一行
process.WaitForExit();
return output;
}
}
public static class SysEnvironment
{
#region --获取注册表中的环境变量
/// <summary>
/// 获取系统环境变量
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static string GetSysEnvironmentByName(string name)
{
string result = string.Empty;
try
{
result = OpenSysEnvironment().GetValue(name).ToString();//读取
}
catch (Exception)
{
return string.Empty;
}
return result;
}
/// <summary>
/// 打开系统环境变量注册表
/// </summary>
/// <returns>RegistryKey</returns>
private static RegistryKey OpenSysEnvironment()
{
RegistryKey regLocalMachine = Registry.LocalMachine;
RegistryKey regSYSTEM = regLocalMachine.OpenSubKey("SYSTEM", true);//打开HKEY_LOCAL_MACHINE下的SYSTEM
RegistryKey regControlSet001 = regSYSTEM.OpenSubKey("ControlSet001", true);//打开ControlSet001
RegistryKey regControl = regControlSet001.OpenSubKey("Control", true);//打开Control
RegistryKey regManager = regControl.OpenSubKey("Session Manager", true);//打开Control
RegistryKey regEnvironment = regManager.OpenSubKey("Environment", true);
return regEnvironment;
}
/// <summary>
/// 设置系统环境变量
/// </summary>
/// <param name="name">变量名</param>
/// <param name="strValue">值</param>
public static void SetSysEnvironment(string name, string strValue)
{
OpenSysEnvironment().SetValue(name, strValue);
}
#endregion
/// <summary>
/// 检测系统环境变量是否存在
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static bool CheckSysEnvironmentExist(string name)
{
if (!string.IsNullOrEmpty(GetSysEnvironmentByName(name)))
return true;
else
return false;
}
/// <summary>
/// 添加到PATH环境变量（会检测路径是否存在，存在就不重复）
/// </summary>
/// <param name="strPath"></param>
public static void SetPathAfter(string strHome)
{
string pathlist;
pathlist = GetSysEnvironmentByName("PATH");
bool isPathExist = false;
if (pathlist.Length > 1)
{
//检测是否以;结尾
if (pathlist.Substring(pathlist.Length - 1, 1) != ";") //截取最后一个字符,判断这个字符不等于;号,
{
SetSysEnvironment("PATH", pathlist + ";");
pathlist = GetSysEnvironmentByName("PATH");
}
string[] list = pathlist.Split(';');//以;切割
foreach (string item in list)
{
if (item == strHome)
isPathExist = true;
}
}
if (!isPathExist)
{
SetSysEnvironment("PATH", pathlist + strHome + ";");
}
}
public static void SetPathBefore(string strHome)
{
string pathlist;
pathlist = GetSysEnvironmentByName("PATH");
string[] list = pathlist.Split(';');
bool isPathExist = false;
foreach (string item in list)
{
if (item == strHome)
isPathExist = true;
}
if (!isPathExist)
{
SetSysEnvironment("PATH", strHome + ";" + pathlist);
}
}
public static void SetPath(string strHome)
{
string pathlist;
pathlist = GetSysEnvironmentByName("PATH");
string[] list = pathlist.Split(';');
bool isPathExist = false;
foreach (string item in list)
{
if (item == strHome)
isPathExist = true;
}
if (!isPathExist)
{
SetSysEnvironment("PATH", pathlist + strHome + ";");
}
}
}
//Kernel32.DLL内有SetEnvironmentVariable函数用于设置系统环境变量
//C#调用要用DllImport，代码封装如下：
class SetSysEnvironmentVariable
{
[DllImport("Kernel32.DLL ", SetLastError = true)]
public static extern bool SetEnvironmentVariable(string lpName, string lpValue);
public static void SetPath(string pathValue)
{
string pathlist;
pathlist = SysEnvironment.GetSysEnvironmentByName("PATH");
string[] list = pathlist.Split(';');
bool isPathExist = false;
foreach (string item in list)
{
if (item == pathValue)
isPathExist = true;
}
if (!isPathExist)
{
SetEnvironmentVariable("PATH", pathlist + pathValue + ";");
}
}
}
}
