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   源码介绍

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public partial class WebsiteController : Form
	{
		#region enumerators and variables

		private enum eStates
		{
			Start = 2,
			Stop  = 4,
			Pause = 6,
		}

		private string lastWebsite;

		#endregion enumerators and variables

		#region constructor

		public WebsiteController()
		{
			InitializeComponent();
			initWebsiteList();
		}

		#endregion constructor

		#region properties

		private string websiteHash
		{
			get
			{
				return string.Format("{0}:{1}:{2}",
									 txtServer.Text, txtUserID.Text, txtPassword.Text);
			}
		}

		#endregion properties

		#region private support methods

		private void initWebsiteList()
		{
			if (websiteHash == lastWebsite)
				return;
			lastWebsite = websiteHash;
			Cursor saveCursor = Cursor;
			Cursor = Cursors.WaitCursor;
			cmbWebsites.Items.Clear();
			cmbWebsites.Items.AddRange(enumerateSites());
			if (cmbWebsites.Items.Count > 0)
				cmbWebsites.SelectedIndex = 0;
			Cursor = saveCursor;
		}

		/// <summary>
		/// Given an eStates of "Start" or "Stop", set the state on the currently
		/// selected website
		/// </summary>
		/// <param name="state">Either eStates.Stop or eStates.Start to stop or start the website</param>
		private void siteInvoke(eStates state)
		{
			string site = getSiteIdByName(cmbWebsites.SelectedItem.ToString());
			if (site == null)
			{
				// on the odd chance that someone removed the website since we
				// enumerated the list
				MessageBox.Show("Website '"   cmbWebsites.SelectedItem   "' not found", "Can't "   state   " website");
				showStatus(site);
				return;
			}
			lblSite.Text = site;

			try
			{
				ConnectionOptions connectionOptions = new ConnectionOptions();

				if (txtUserID.Text.Length > 0)
				{
					connectionOptions.Username = txtUserID.Text;
					connectionOptions.Password = txtPassword.Text;
				}
				else
				{
					connectionOptions.Impersonation = ImpersonationLevel.Impersonate;
				}

				ManagementScope managementScope =
					new ManagementScope(@"\\"   txtServer.Text   @"\root\microsoftiisv2", connectionOptions);

				managementScope.Connect();
				if (managementScope.IsConnected == false)
				{
					MessageBox.Show("Could not connect to WMI namespace "   managementScope.Path, "Connect Failed");
				}
				else
				{
					SelectQuery selectQuery =
						new SelectQuery("Select * From IIsWebServer Where Name = 'W3SVC/"   site   "'");
					using (ManagementObjectSearcher managementObjectSearcher = 
							new ManagementObjectSearcher(managementScope, selectQuery))
					{
						foreach (ManagementObject objMgmt in managementObjectSearcher.Get())
							objMgmt.InvokeMethod(state.ToString(), new object[0]);
					}
				}
			}
			catch (Exception ex)
			{
				if (ex.ToString().Contains("Invalid namespace"))
				{
					MessageBox.Show("Invalid Namespace Exception"   Environment.NewLine   Environment.NewLine  
					                "This program only works with IIS 6 and later", "Can't "   state   " website");
				}
				else
				{
					MessageBox.Show(ex.Message, "Can't "   state   " website");
				}
			}

			showStatus(site);
		}

		/// <summary>
		/// Find the siteId for a specified website name. This assumes that the website's
		/// ServerComment property contains the website name.
		/// </summary>
		/// <param name="siteName"></param>
		/// <returns></returns>
		private string getSiteIdByName(string siteName)
		{
			DirectoryEntry root = getDirectoryEntry("IIS://"   txtServer.Text   "/W3SVC");
			foreach (DirectoryEntry e in root.Children)
			{
				if (e.SchemaClassName == "IIsWebServer")
				{
					if (e.Properties["ServerComment"].Value.ToString().Equals(siteName, StringComparison.OrdinalIgnoreCase))
					{
						return e.Name;
					}
				}
			}
			return null;
		}

		/// <summary>
		/// Return a string array of the available website names
		/// </summary>
		/// <returns></returns>
		private string[] enumerateSites()
		{
			List<string> siteNames = new List<string>();
			try
			{
				DirectoryEntry root = getDirectoryEntry("IIS://"   txtServer.Text   "/W3SVC");
				foreach (DirectoryEntry e in root.Children)
				{
					if (e.SchemaClassName == "IIsWebServer")
					{
						siteNames.Add(e.Properties["ServerComment"].Value.ToString());
					}
				}
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Can't enumerate websites");
				lastWebsite = null;
				txtServer.Focus();
				txtServer.SelectAll();
			}
			return siteNames.ToArray();
		}

		/// <summary>
		/// Lookup a website by name and update the display for the site ID and status
		/// </summary>
		/// <param name="siteName"></param>
		private void findWebsite(string siteName)
		{
			string site = getSiteIdByName(siteName);
			if (site == null)
			{
				MessageBox.Show("Website '"   siteName   "' not found", "Error");
				showStatus(site);
				return;
			}
			lblSite.Text = site;
			showStatus(site);
		}

		/// <summary>
		/// Show the running/stopped state for the specified site ID
		/// </summary>
		/// <param name="siteId">Numeric site ID</param>
		private void showStatus(string siteId)
		{
			string result = "unknown";
			DirectoryEntry root = getDirectoryEntry("IIS://"   txtServer.Text   "/W3SVC/"   siteId);
			PropertyValueCollection pvc;
			pvc = root.Properties["ServerState"];
			if (pvc.Value != null)
				result = (pvc.Value.Equals((int)eStates.Start) ? "Running" :
				          pvc.Value.Equals((int)eStates.Stop) ? "Stopped" :
						  pvc.Value.Equals((int)eStates.Pause) ? "Paused" :
						  pvc.Value.ToString());
			lblStatus.Text = result   " ("   pvc.Value   ")";
		}

		/// <summary>
		/// Return a DirectoryEntry object for path using optional userId and password
		/// </summary>
		/// <param name="path"></param>
		/// <returns></returns>
		private DirectoryEntry getDirectoryEntry(string path)
		{
			if (txtUserID.Text.Length > 0)
				return new DirectoryEntry(path, txtUserID.Text, txtPassword.Text);
			else
				return new DirectoryEntry(path);
		}

		#endregion private support methods

		#region event handlers

		/// <summary>
		/// Set up ID and status of selected website
		/// </summary>
		private void cmbWebsites_SelectedIndexChanged(object sender, EventArgs e)
		{
			findWebsite(cmbWebsites.SelectedItem.ToString());
		}

		/// <summary>
		/// On entry to the websites combobox, fill with enumeration of websites if necessary
		/// </summary>
		private void cmbWebsites_Enter(object sender, EventArgs e)
		{
			initWebsiteList();
		}

		/// <summary>
		/// Exit button clicked - goodbye
		/// </summary>
		private void btnExit_Click(object sender, EventArgs e)
		{
			Close();
		}

		/// <summary>
		/// Attempt to start the selected website
		/// </summary>
		private void btnStart_Click(object sender, EventArgs e)
		{
			siteInvoke(eStates.Start);
		}

		/// <summary>
		/// Attempt to stop the selected website
		/// </summary>
		private void btnStop_Click(object sender, EventArgs e)
		{
			siteInvoke(eStates.Stop);
		}

		#endregion event handlers
	}