????? ??? ?? ????? ?? Visual C# .NET ?? Visual C# 2005 ?? ???????? ???? ?? ??? ???? ????

???? ?????? ???? ??????
???? ID: 815314 - ?? ???????? ?? ?????? ??? ?? ?? ???? ???? ???? ??.
?? ???? ?? Microsoft Visual Basic .NET ??????? ?? ???, ?????814564.
??? ?? ??????? ???? | ??? ?? ??????? ????

?? ????? ??

??????

?? ??? ?? ??? ???? ????? ???? ?? ?? ?? ????? ?? ?? Microsoft .NET Framework ?? ????? ?? Windows ????? ??? ?? ???????? ???? ????? ?? ??????????????? Windows ????? ??? ?? ??? ???????? ?? ???? ???? ?? ????? ???????????????? ?? ?????? ??? ?? ???? ????? ???????????? ????? ??? ???? ?? ???, ????? ?? ????? ????? ?????, ??? ?? ?????, ?? ???????????? ?? ??? ?? ???? ?? ??? ????????? ???? ?? ??? ????? ????? ??? ????? ??? ??? ????? ?? ??? ???? ?? ?? ????? ???? ???

??????????

????? ???? outlines ???????? ?????????, ??????????, ??????? ?????? ?? ?????? ??? ?? ???? ???:
  • Microsoft .NET Framework
  • Microsoft Visual C# .NET ?? Microsoft Visual C# 2005?
?? ???? ????? ?? ?? ?? ????? ???? ?? ?????? ???:
  • Microsoft Visual C# .NET ?? Microsoft Visual C# 2005 ????????
  • Microsoft Visual Studio .NET ?? Microsoft Visual Studio 2005 ???????
  • .NET Framework ??? ???????? ??? ??????

?????? ????? ?? ???????? ?? ?????


You can find the existing logs on a computer by using the shared methodGetEventLogs??????????????? TheGetEventLogsmethod searches for all event logs on the local computer, and creates an array of????????objects that contain the list. The following example retrieves a list of logs on the local computer, and then displays the name of the log in a console window.
EventLog[] remoteEventLogs; 
// Gets logs on the local computer, gives remote computer name to get the logs on the remote computer.
remoteEventLogs = EventLog.GetEventLogs(System.Environment.MachineName);
Console.WriteLine("Number of logs on computer: " + remoteEventLogs.Length);

for ( int i=0; i<remoteEventLogs.Length; i++ )
   Console.WriteLine("Log: " + remoteEventLogs[i].Log);

Read and Write Logs to Local and Remote System

Read logs

To read an event log, use theEntries?? ???????????????? The????????????Entries??? ?? ??? ????? ??? ??? ??? ???????????? ?? ?????? ??? ?? ?? ???? ??? ?? ????? ?? ?????? ?? iterate, ?? ????????? ??? ??? ??? ???????????? ?? ?????? ????? ??? ????????? ???? ?? ?? ??? ???? ????:
      
//logType can be Application, Security, System or any other Custom Log.
string logType = "Application";
			
EventLog ev = new EventLog(logType, System.Environment.MachineName);
int LastLogToShow = ev.Entries.Count;
if ( LastLogToShow <= 0 )
Console.WriteLine("No Event Logs in the Log :" + logType);

// Read the last 2 records in the specified log. 
int i;
for ( i = ev.Entries.Count - 1; i>= LastLogToShow - 2; i--)
{
	EventLogEntry CurrentEntry = ev.Entries[i];
	Console.WriteLine("Event ID : " + CurrentEntry.EventID);
	Console.WriteLine("Entry Type : " + CurrentEntry.EntryType.ToString());
	Console.WriteLine("Message :  " + CurrentEntry.Message + "\n");
}	
ev.Close();

????? ?????

??? ????? ??? ?????, ?? ?????WriteEntry?? ??? ????????????????? ????? ??? ??????????? ????? ?? ??? ???? ????????? ??? ????? ?? ?????? ?? ??? ?? ?? ??? ???? ?? ??? ???? ????? ???? ?????? ??? ????? ?? ????? ??? ?? ????? ??? ???? ?? ??? ???? ??? ?????? ????????? ?? ???? ??? ???? ??????? ?? ??? ????? Microsoft ??? ???? ?? ?????
??????? ????? ????? Ramification
(vs.71) http://msdn2.Microsoft.com/en-us/library/4xz6w79h .aspx
?? ????? ??? ??? ???? ?????? ??????????????? ??????? ???? ?? ???? ??? ???? ?? ??? ???????????? ??? ???? ???? ?????? ???? ??? ?? ??? ????????? ????? ??, ?? ?????? ????: ???? ??? ???? ?????? ????????? ????? ?? ??? ?? ??? ???? ?? ??? ??, ?? ???? ??? ??? ????? ??? ?? ??? ??????? ?? ????? ?? ???CreateEventSource(???CreateEventSource?????? ?? ?????? ??)?
  
//See if the source exists. 
if ( ! ( EventLog.SourceExists("MySystemSource", System.Environment.MachineName)))
EventLog.CreateEventSource("MySystemSource", "System", System.Environment.MachineName);
        
EventLog ev = new EventLog("System", System.Environment.MachineName, "MySystemSource");
/* Writing to system log, in the similar way you can write to other 
 * logs that you have appropriate permissions to write to
 */
ev.WriteEntry("Warning is written to system Log", EventLogEntryType.Warning, 10001);
MessageBox.Show("Warning is written to System Log");
ev.Close();   

?????? ?????

?? ??? ????? ??? ???? ??? ??, ?? ?? ???? ?? ??????? ??????? ?? ????? ??, ?? ????? ???????????? ?? ???????? ???? ?? ??? ??????? ???? ??? ????? ?????????? ??? ???? ??, ??? ?? ?? ???? ??? ?? ?????? ????????? ??? ???? ????, ?? ?????????? ??????? ?? ??? ?? ??????? ???? ?? ??? ??? ?? ?????? ???? ?????????????? ??? ??? ??????? ?? ?????? ???

???:????? ??? ???????????? ?? ???? ???? ?? ??? ?? ?????? ?????? ?????????? ???? ??? ?? ???????? ???
     
//Create an EventLog instance and pass log name and MachineName where the log resides.
EventLog ev = new EventLog("Security", System.Environment.MachineName);
ev.Clear();
ev.Close(); 

????? ?? ?????? ????? ?????

????? ??? ?????

?? ????? ?? ???? ???CreateEventSource???? ????? ????? ?????? ????? ?? ??? ?????? ??? ???? ???? ?? ?? ?? ????? ??? ????? ???, ?? ?????SourceExists???????? ???? ?? ????? ?? ????? ?? ??? ??? ?? ???? ?? ?? ???? ?????, ?? ???? ??? ??? ???? ?? ??? ????CreateEventSource. ??? ?? ???? ?? ????? ??, ?? ????? ??? ?? ????? ?? ?????? ????System.ArgumentExceptionthrown ???
     
// Create the source, if it does not already exist.
if (! (EventLog.SourceExists("MyOldSource", System.Environment.MachineName)))
		EventLog.CreateEventSource("MyOldSource", "MyNewLog", System.Environment.MachineName);
Console.WriteLine("CreatingEventSource"); 

????? ??? ?????

????? ??? ?? ????? ?? ??? ?? ?? ????? ?? ???? ?????????? ??? ????????????????? ?? ?? ???? ????? ??? ????? ??? ???? ?? ??? ??? ???? ??? ?????, ???? ???? ?? ?? ??? ????? ??? ?? ????? ???, ????????? ???? ?? ??? ??? ???? ????? ?? ?? ??? ???? ?? ??? ???? ?? ??? ????
     
string logName = "MyNewLog";
if ( EventLog.SourceExists("MyOldSource", System.Environment.MachineName))
{
	logName = EventLog.LogNameFromSourceName("MyOldSource", System.Environment.MachineName);
	EventLog.DeleteEventSource("MyOldSource", System.Environment.MachineName);
	EventLog.Delete(logName, System.Environment.MachineName);
	Console.WriteLine(logName + " deleted.");
}    

????? ??? ??????? ?????

????? ??? ????????? ???? ???? ?? ?? ????? ????? ??????? ?? ???? ??? ??? ???? ?? ???, ???????????EntryWritten?????? ?? ??? ????? ??????????????. ??? ??, ??? ????EnableRaisingEvents???? ?? ???True.

???:?? ???? ??????? ?? ???? ????? ??????? ?? ???????????? ?? ??????? ???????? ?? ???? ?? ???? ?? ?????? ???????? ?? ???? ???????????? ?? ??? ??????? ??????? ???? ?? ???? ???

??? ?? ???? ????

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Security;
using System.IO;
using System.Diagnostics;

namespace WindowsApplication1
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Diagnostics.EventLog eventLog1;
		private System.Windows.Forms.Button btnListLog;
		private System.Windows.Forms.Button btnReadLog;
		private System.Windows.Forms.Button btnWriteLog;
		private System.Windows.Forms.Button btnClearLog;
		private System.Windows.Forms.Button btnCreateLog;
		private System.Windows.Forms.Button btnDeleteLog;
		private System.Windows.Forms.Button btnRecNotice;
		
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support.
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call.
			//
		}

		/// <summary>
		/// Clean up any resources that are being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.eventLog1 = new System.Diagnostics.EventLog();
			this.btnListLog = new System.Windows.Forms.Button();
			this.btnReadLog = new System.Windows.Forms.Button();
			this.btnWriteLog = new System.Windows.Forms.Button();
			this.btnClearLog = new System.Windows.Forms.Button();
			this.btnCreateLog = new System.Windows.Forms.Button();
			this.btnDeleteLog = new System.Windows.Forms.Button();
			this.btnRecNotice = new System.Windows.Forms.Button();
			((System.ComponentModel.ISupportInitialize)(this.eventLog1)).BeginInit();
			this.SuspendLayout();
			// 
			// eventLog1
			// 
			this.eventLog1.MachineName = System.Environment.MachineName;
			this.eventLog1.SynchronizingObject = this;
			this.eventLog1.EntryWritten += new System.Diagnostics.EntryWrittenEventHandler(this.eventLog1_EntryWritten);

			// 
			// btnListLog
			// 
			this.btnListLog.Location = new System.Drawing.Point(32, 16);
			this.btnListLog.Name = "btnListLog";
			this.btnListLog.Size = new System.Drawing.Size(152, 23);
			this.btnListLog.TabIndex = 0;
			this.btnListLog.Text = "List Event Logs";
			this.btnListLog.Click += new System.EventHandler(this.btnListLog_Click);
			// 
			// btnReadLog
			// 
			this.btnReadLog.Location = new System.Drawing.Point(32, 46);
			this.btnReadLog.Name = "btnReadLog";
			this.btnReadLog.Size = new System.Drawing.Size(152, 23);
			this.btnReadLog.TabIndex = 1;
			this.btnReadLog.Text = "Read Event Logs";
			this.btnReadLog.Click += new System.EventHandler(this.btnReadLog_Click);
			// 
			// btnWriteLog
			// 
			this.btnWriteLog.Location = new System.Drawing.Point(32, 77);
			this.btnWriteLog.Name = "btnWriteLog";
			this.btnWriteLog.Size = new System.Drawing.Size(152, 23);
			this.btnWriteLog.TabIndex = 2;
			this.btnWriteLog.Text = "Write Event Logs";
			this.btnWriteLog.Click += new System.EventHandler(this.btnWriteLog_Click);
	
 		// 
			// btnClearLog
			// 
			this.btnClearLog.Location = new System.Drawing.Point(32, 106);
			this.btnClearLog.Name = "btnClearLog";
			this.btnClearLog.Size = new System.Drawing.Size(152, 23);
			this.btnClearLog.TabIndex = 3;
			this.btnClearLog.Text = "Clear Logs";
			this.btnClearLog.Click += new System.EventHandler(this.btnClearLog_Click);

			// 
			// btnCreateLog
			// 
			this.btnCreateLog.Location = new System.Drawing.Point(32, 137);
			this.btnCreateLog.Name = "btnCreateLog";
			this.btnCreateLog.Size = new System.Drawing.Size(152, 23);
			this.btnCreateLog.TabIndex = 4;
			this.btnCreateLog.Text = "Create Custom Logs";
			this.btnCreateLog.Click += new System.EventHandler(this.btnCreateLog_Click);

			// 
			// btnDeleteLog
			// 
			this.btnDeleteLog.Location = new System.Drawing.Point(32, 168);
			this.btnDeleteLog.Name = "btnDeleteLog";
			this.btnDeleteLog.Size = new System.Drawing.Size(152, 23);
			this.btnDeleteLog.TabIndex = 5;
			this.btnDeleteLog.Text = "Delete Custom Logs";
			this.btnDeleteLog.Click += new System.EventHandler(this.btnDeleteLog_Click);
			// 
			// btnRecNotice
			// 
			this.btnRecNotice.Location = new System.Drawing.Point(32, 199);
			this.btnRecNotice.Name = "btnRecNotice";
			this.btnRecNotice.Size = new System.Drawing.Size(152, 23);
			this.btnRecNotice.TabIndex = 6;
			this.btnRecNotice.Text = "Receive Event Notifications";
			this.btnRecNotice.Click += new System.EventHandler(this.btnRecNotice_Click);

			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(216, 237);
			this.Controls.Add(this.btnRecNotice);
			this.Controls.Add(this.btnDeleteLog);
			this.Controls.Add(this.btnCreateLog);
			this.Controls.Add(this.btnClearLog);
			this.Controls.Add(this.btnWriteLog);
			this.Controls.Add(this.btnReadLog);
			this.Controls.Add(this.btnListLog);
			this.Name = "Form1";
			this.Text = "Form1";
			((System.ComponentModel.ISupportInitialize)(this.eventLog1)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void btnListLog_Click(object sender, System.EventArgs e)
		{
			EventLog[] remoteEventLogs; 
			// Gets logs on the local computer, gives remote computer name to get the logs on the remote computer.
			remoteEventLogs = EventLog.GetEventLogs(System.Environment.MachineName);

			Console.WriteLine("Number of logs on computer: " + remoteEventLogs.Length);

			for ( int i=0; i<remoteEventLogs.Length; i++ )
				Console.WriteLine("Log: " + remoteEventLogs[i].Log);
		}

		private void btnReadLog_Click(object sender, System.EventArgs e)
		{

			//logType can be Application, Security, System or any other Custom Log.
			string logType = "Application";
			
			/* In this case the EventLog constructor is passed a string variable for the log name and 
			 * second argument mention the computer name that you want to read the logs from,
			 * and that you have appropriate permissions to*/

			EventLog ev = new EventLog(logType, System.Environment.MachineName);

			int LastLogToShow = ev.Entries.Count;
			if ( LastLogToShow <= 0 )
				Console.WriteLine("No Event Logs in the Log :" + logType);
			// Read the last 2 record in the specified log. 
			int i;
			for ( i = ev.Entries.Count - 1; i>= LastLogToShow - 2; i--)
			{
				EventLogEntry CurrentEntry = ev.Entries[i];
				Console.WriteLine("Event ID : " + CurrentEntry.EventID);
				Console.WriteLine("Entry Type : " + CurrentEntry.EntryType.ToString());
				Console.WriteLine("Message :  " + CurrentEntry.Message + "\n");
			}	

			ev.Close();

			/* Similarly you can loop through all the entries in the log using
			 * the entries collection as shown in the following commented code.
			 * For Each entry In ev.Entries */    
		}

		private void btnWriteLog_Click(object sender, System.EventArgs e)
		{
			/* When writing to an event log, pass the computer name where 
			 * the log resides.  Here the MachineName Property of the Environment class 
			 * is used to determine the name of the local computer.  Assuming that you have 
			 * the appropriate permissions, it is also easy to write to event logs on 
			 * other computers.*/

			//See if the Source exists. 
			if ( ! ( EventLog.SourceExists("MySystemSource", System.Environment.MachineName)))
				EventLog.CreateEventSource("MySystemSource", "System", System.Environment.MachineName);
        
					EventLog ev = new EventLog("System", System.Environment.MachineName, "MySystemSource");
			/* Writing to system log, in the similar way you can write to other 
			 * logs that you have appropriate permissions to write to
			 */
			ev.WriteEntry("Warning is written to system Log", EventLogEntryType.Warning, 10001);
			MessageBox.Show("Warning is written to System Log");
			ev.Close();
		}

		private void btnClearLog_Click(object sender, System.EventArgs e)
		{
			//Create an EventLog instance, and pass log name and MachineName where the log resides.
			EventLog ev = new EventLog("Security", System.Environment.MachineName);
			ev.Clear();
			ev.Close();
		}

		private void btnCreateLog_Click(object sender, System.EventArgs e)
		{
			// Create the source, if it does not already exist.
			if (! (EventLog.SourceExists("MyOldSource", System.Environment.MachineName)))
				// Creating a new log
				EventLog.CreateEventSource("MyOldSource", "MyNewLog", System.Environment.MachineName);
			Console.WriteLine("CreatingEventSource");
		}

		private void btnDeleteLog_Click(object sender, System.EventArgs e)
		{
			string logName = "MyNewLog";

			if ( EventLog.SourceExists("MyOldSource", System.Environment.MachineName))
			{
				logName = EventLog.LogNameFromSourceName("MyOldSource", System.Environment.MachineName);
				EventLog.DeleteEventSource("MyOldSource", System.Environment.MachineName);
				EventLog.Delete(logName, System.Environment.MachineName);
				Console.WriteLine(logName + " deleted.");
			}            
		}

		private void btnRecNotice_Click(object sender, System.EventArgs e)
		{
			// Create the source, if it does not already exist.
			if (EventLog.SourceExists("MySource", System.Environment.MachineName) == false)
			{
				EventLog.CreateEventSource("MySource", "Application", System.Environment.MachineName);
				Console.WriteLine("CreatingEventSource");
			}

			eventLog1.Log = "Application";
			//Enable EnableRaisingEvents to true
			eventLog1.EnableRaisingEvents = true;
			EventLog.WriteEntry("MySource", "EntryWritten event is fired", EventLogEntryType.Information);
		}

		private void eventLog1_EntryWritten(object sender, System.Diagnostics.EntryWrittenEventArgs e)
		{
			if (e.Entry.Source  == "MySource")
				Console.WriteLine("Entry written by my app. Message: " + e.Entry.Message);
		}
	}
}

?????? ?? ?????? ????

?????? ???? ?? ???, ????? ????? ?? ???? ????:
  1. Microsoft Visual Studio .NET ??? ?? Microsoft Visual Studio 2005 ???, ????? ??? ??? ????? C# .NET ?? ????? C# 2005 Windows ????????? ?????????? ???????? ??? ??, Form1.vb ?? ???? ???
  2. ?? ???? ?? "????? ??? ????" ??? ??? ???????? ??? ?? ??? Form1.vb ??? ??? ?? ???????????? ?????
  3. ????? ???????? ???????? ??,???????????????? ??????
  4. Perform various actions on the form.
  5. ????? ????????????? ??,Server Explorerto verify the results.
  6. ??????? ?????????, ?? ???? ??? ??????? ????Your Computer Name.
  7. Under the computer name, expandEvent Logs.

    ???:The?????node of Server Explorer is not available in the Academic Edition of Visual C# .NET. In such cases, you can use the Windows Event Viewer to view the results of your application.
  8. Check Server Explorer to verify that all the tasks are performed correctly.

??????

???? ??????? ?? ???, Microsoft ?? ????? ??? ???? ?? ????::
EventLog Class
(vs.71) http://msdn2.Microsoft.com/en-us/library/SYSTEM.diagnostics.eventlog .aspx

???

???? ID: 815314 - ????? ???????: 05 ?????? 2010 - ??????: 2.0
???? ???? ???? ??:
  • Microsoft Visual C# .NET 2002 Standard Edition
  • Microsoft Visual C# .NET 2003 Standard Edition
  • Microsoft Visual C# 2005 Express Edition
??????: 
kbeventservice kbnetwork kbmanaged kbprogramming kbhowtomaster kbeventlog kbhowto kbmt KB815314 KbMthi
???? ?????? ????????
??????????: ?? ???? ?? ???? ??????? ?? ????? ?? Microsoft ????-?????? ?????????? ?????? ?????? ???? ??? ??. Microsoft ???? ??? ????-???????? ?? ????-???????? ????? ?????? ?? ???? ???????? ???? ?? ???? ????? ????? ??? ?? ??? ?????? ?? ???? ???? ???? ??? ????? ??. ???????, ????-???????? ???? ????? ???? ???? ???? ???. ?????, ????????, ?????-???? ?? ??????? ?? ???????? ?? ???? ???, ???? ?? ??? ?????? ???? ???? ??? ????? ??? ?? ???? ??. Microsoft ??????? ??? ???? ?? ?????? ?? ??????????, ????????? ?? ??? ?????? ?? ???? ????? ?? ???? ???????? ?? ??? ???? ????? ?? ??? ????????? ???? ??. Microsoft ????-?????? ?????????? ?? ????? ?????? ?? ?? ??? ??.
?????????? ?? ??????? ????????? ??????? ??:815314

??????????? ???

 

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