1	eventLog1.Log = "Application";
2
3	foreach (System.Diagnostics.EventLogEntry entry in eventLog1.Entries)
4	{
5	Label.Text+=entry.Message;
6	}

查詢：

using System.Diagnostics;

string ddd;
EventLog eventLog1 = new EventLog();
eventLog1.Log = "Application";
                foreach (System.Diagnostics.EventLogEntry entry in eventLog1.Entries)
                {
                    ddd= entry.Message;
                    int d = entry.EventID;
                    ddd=entry.UserName;
                }

LINQ:

//宣告EventLog物件 

02
EventLog tLog = new EventLog(); 

03
//選取Application類的Log 

04
tLog.Log = "Application"; 

05
  
06
//選出Type為Warring與Error，且時間介於選擇區間的Log 

07
var AppLogEntries = 

08
            from System.Diagnostics.EventLogEntry e2 in

09
                tLog.Entries 

10
            where (e2.EntryType == 

11
               System.Diagnostics.EventLogEntryType.Warning || e2.EntryType == 

12
               System.Diagnostics.EventLogEntryType.Error) && e2.TimeGenerated > 

13
               dtpStart.Value && e2.TimeGenerated < dtpEnd.Value 

14
            //選出想要的欄位 

15
            select new

16
            { 

17
                e2.Source, 

18
                e2.InstanceId, 

19
                e2.Message, 

20
                e2.TimeGenerated, 

21
                e2.UserName, 

22
                e2.EntryType, 

23
            }; 

24
  
25
//放到DataSource上 

26
dataGridView1.DataSource = AppLogEntries.ToList();

寫入：

using System.Diagnostics;

public void WriteToWindowsEvent(string aSource,string aMessage){

if(!EventLog.SourceExists(aSource)){
EventLog.CreateEventSource(aSource,"Project");
}
EventLog Log = new EventLog("Project");
oLog.Source = aSource;
oLog.WriteEntry(aMessage ,EventLogEntryType.Error);
}

windows 事件監視器資訊查詢/寫入

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