Proxy Switch

Recently had a need to be able to switch on/off proxy at will and got tired of going to Internet Explorer options to set/change it. Hopefully someone else will get benefit from this nice tool.

1. Open Visual Studio
   1. File -> New Project -> Visual C# – Windows -> Windows Forms Application
2. Add two textbox controls and two buttons
3. Double Click on each button to create the OnClick event

#region Using Statements - Start
#region Default Using Statements - Start
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
#endregion Default Using Statements - Stop

#region Special Using Statements - Start
using System.Security.Permissions;
using Microsoft.Win32;
using System.Diagnostics;
#endregion Special Using Statements - Stop
#endregion Using Statements - Stop

namespace ProxySwitch
{
	public partial class Form1 : Form
	{
		public RegistryKey registry = Registry.CurrentUser.OpenSubKey("Software\Microsoft\Windows\CurrentVersion\Internet Settings", true);
		public int nProxyStatus = 0;

		public Form1()
		{
			InitializeComponent();
		}

		private void Form1_Load(object sender, EventArgs e)
		{
			nProxyCheckStatus();
		}

		private void btnSetProxy_Click(object sender, EventArgs e)
		{
			btnSetProxy.Enabled = false;
			btnProxySwitch.Enabled = false;


			if (!bEmptyNullCheck(tbProxyIP.Text) && !bEmptyNullCheck(tbProxyPort.Text))
			{
				CheckBrowsers();

				registry.SetValue("ProxyServer", tbProxyIP.Text + ":" + tbProxyPort.Text);

				registry.SetValue("ProxyEnable", 1);

				nProxyCheckStatus();

				btnSetProxy.Enabled = true;
				btnProxySwitch.Enabled = true;
			}
			else
			{
				MessageBox.Show("In order to set/change the proxy both textboxes need information", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
				btnSetProxy.Enabled = true;
				btnProxySwitch.Enabled = true;
			}
		}

		private void btnProxySwitch_Click(object sender, EventArgs e)
		{
			btnSetProxy.Enabled = false;
			btnProxySwitch.Enabled = false;

			CheckBrowsers();

			switch (nProxyStatus)
			{
				case 0:
					//Enable Proxy
					//registry.SetValue("ProxyServer", 1);
					registry.SetValue("ProxyEnable", 1);
					btnProxySwitch.Text = "Disable Proxy";
					break;
				case 1:
					//Disable Proxy
					//registry.SetValue("ProxyServer", 0);
					registry.SetValue("ProxyEnable", 0);
					btnProxySwitch.Text = "Enable Proxy";
					break;
			}

			btnSetProxy.Enabled = true;
			btnProxySwitch.Enabled = true;
		}

		private void nProxyCheckStatus()
		{
			nProxyStatus = (int)registry.GetValue("ProxyEnable");

			string sProxyServer = (string)registry.GetValue("ProxyServer");
			string[] saProxyServer = sProxyServer.Split(':');

			tbProxyIP.Text = saProxyServer[0];
			tbProxyPort.Text = saProxyServer[1];


			switch (nProxyStatus)
			{
				case 0:
					btnProxySwitch.Text = "Enable Proxy";
					break;
				case 1:
					btnProxySwitch.Text = "Disable Proxy";
					break;
			}
		}

		private bool bEmptyNullCheck(string sValue)
		{
			bool bEmpty = true;

			if (!string.IsNullOrEmpty(sValue) && !string.IsNullOrWhiteSpace(sValue))
			{
				bEmpty = false;
			}

			return bEmpty;
		}

		private void CheckBrowsers()
		{
			#region Check If Browsers Are Open - Start
			Process[] pIE = Process.GetProcessesByName("IEXPLORE");
			Process[] pChrome = Process.GetProcessesByName("chrome");

			if (pIE.Length != 0 || pChrome.Length != 0)
			{
				DialogResult dialogResult = MessageBox.Show("In order for this to work Chome and Internet Explorer need to be closed." + Environment.NewLine + Environment.NewLine + "Would you like to continue? If Yes we will forcefully close Chrome and Internet Explorer", Application.ProductName, MessageBoxButtons.YesNo, MessageBoxIcon.Question);
				if (dialogResult == DialogResult.Yes)
				{
					foreach (System.Diagnostics.Process proc in pIE)
					{
						try
						{
							proc.Kill(); // Close it down.
						}
						catch (Exception ex)
						{
							MessageBox.Show("Unable to close Internet Explorer" + Environment.NewLine + Environment.NewLine + ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
						}
					}
					// Wait 10 seconds.
					System.Threading.Thread.Sleep(10000);
					foreach (System.Diagnostics.Process proc in pChrome)
					{
						try
						{
							proc.Kill(); // Close it down.
						}
						catch (Exception ex)
						{
							MessageBox.Show("Unable to close Chrome" + Environment.NewLine + Environment.NewLine + ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
						}
					}
					// Wait 10 seconds.
					System.Threading.Thread.Sleep(10000);
				}
				else if (dialogResult == DialogResult.No)
				{
					MessageBox.Show("Closing Proxy Switch for now, please try again when you do not have your browser windows open.", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
					Application.Exit();
				}
			}
			#endregion Check If Browsers Are Open - Stop
		}
	}
}