按日期限制事件日志

本文关键字：事件 日志 日期 | 更新日期: 2023-09-27 18:07:01

我正在抓取事件日志，然后在数据网格中显示它们，但是对于大日志需要永远返回，所以我想限制过去24小时的日志，但我不确定如何做到这一点。我希望在遍历每个条目之前限制集合，因为那样做仍然需要很长时间。任何帮助都是非常感激的!!

namespace SysTools
{
    public partial class LogViewer : Form
    {
        DataTable eventLog = new DataTable();
        DataSet dataset1 = new DataSet();
        private EventLog unhandledLogs;
        public LogViewer(EventLog logs)
        {
            unhandledLogs = logs;
            InitializeComponent();
        }
        private void LogViewer_Load(object sender, EventArgs e)
        {
            String currentLog = unhandledLogs.Log;
            DataTable dataTable1 = new DataTable();
            DataColumn column;
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.String");
            column.ColumnName = "Level";
            dataTable1.Columns.Add(column);
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.String");
            column.ColumnName = "Category";
            dataTable1.Columns.Add(column);
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.DateTime");
            column.ColumnName = "DateTime";
            dataTable1.Columns.Add(column);
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.String");
            column.ColumnName = "Message";
            dataTable1.Columns.Add(column);
            dataTable1.Rows.Clear();
            DateTime systemtime = new DateTime();
           Int32 count = unhandledLogs.Entries.Count;
            for (int currLogIndex = 0; currLogIndex <= unhandledLogs.Entries.Count; currLogIndex++)
            {
                DataRow drnew = dataTable1.NewRow();
                try
                {
                    EventLogEntry currLogEntrys = unhandledLogs.Entries[currLogIndex];
                    EventLogEntry currLogEntry = currLogEntrys;
                    string entrytype = currLogEntrys.EntryType.ToString();
                    drnew["Level"] = entrytype;
                    drnew["Category"] = currLogEntry.Source;
                    drnew["DateTime"] = currLogEntry.TimeGenerated;
                    drnew["Message"] = currLogEntry.Message;
                    dataTable1.Rows.Add(drnew);
                }
                catch { }
            }
            dataGridView1.DataSource = dataTable1;
            dataTable1.DefaultView.Sort = ("DateTime asc");
        }
    }
}

按日期限制事件日志

看一下EventLogQuery和EventLogReader类。在下面的例子中，我从应用程序事件日志中读取过去24小时的日志，并将它们放入一个列表中。您可以轻松地根据自己的日志和需求进行调整。

注意，我正在做一些比较hack的事情来将日期转换为预期的格式(您应该改进它)，但是看看我如何创建查询，然后只处理检索到的记录。

    public void GetEvents()
    {
        string FormattedDateTime = string.Format("{0}-{1}-{2}T{3}:{4}:{5}.000000000Z",
            DateTime.Now.Year,
            DateTime.Now.Month.ToString("D2"),
            DateTime.Now.AddDays(-1).Day.ToString("D2"),
            DateTime.Now.Hour.ToString("D2"),
            DateTime.Now.Minute.ToString("D2"),
            DateTime.Now.Second.ToString("D2"));
        string LogSource = @"Application";
        string Query = "*[System[TimeCreated[@SystemTime >= '" + FormattedDateTime + "']]]";
        var QueryResult = new EventLogQuery(LogSource, PathType.LogName, Query);
        var Reader = new System.Diagnostics.Eventing.Reader.EventLogReader(QueryResult);
        List<EventRecord> Events = new List<EventRecord>();
        bool Reading = true;
        while (Reading)
        {
            EventRecord Rec = Reader.ReadEvent();
            if (Rec == null)
                Reading = false;
            Events.Add(Rec);
            // You could add to your own collection here instead of adding to a list
        }
    }
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