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POHow to read Application log and filter it based on source in ASP.NET?
 

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  1. POHow to read Application log and filter it based on source in ASP.NET?
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    <p>In my application I want to read local system's application event log. Currently I am using the following code</p> <pre><code>public partial class AppLog : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { System.Diagnostics.EventLog logInfo = new System.Diagnostics.EventLog(); logInfo.Log = "Application"; logInfo.MachineName = "."; // Local machine string strImage = ""; // Icon for the event Response.Write("&lt;p&gt;There are " + logInfo.Entries.Count + " entries in the System event log.&lt;/p&gt;"); foreach (EventLogEntry entry in logInfo.Entries.Cast&lt;EventLogEntry&gt;().Reverse&lt;EventLogEntry&gt;()) { switch (entry.EntryType) { case EventLogEntryType.Warning: strImage = "images/icon_warning.PNG"; break; case EventLogEntryType.Error: strImage = "images/icon_error.PNG"; break; default: strImage = "images/icon_info.PNG"; break; } Response.Write("&lt;img src=\"" + strImage + "\"&gt;&amp;nbsp;|&amp;nbsp;"); Response.Write(entry.TimeGenerated.ToString() + "&amp;nbsp;|&amp;nbsp;"); Response.Write(entry.Message.ToString() + "&lt;br&gt;\r\n"); } } } } </code></pre> <p>I want to show only the log created by ASP.NET.I know I can filter it within the for-each loop.But this takes lot of time as it needs to iterate through the whole application log.Is there any way to to filter it before it goes into any iteration??</p> <p>====EDIT====</p> <p>I got a way to make query,don't know whether it really improves the performance</p> <pre><code> var result = (from EventLogEntry elog in logInfo.Entries where (elog.Source.ToString().Equals("ASP.NET 2.0.50727.0")) orderby elog.TimeGenerated descending select elog).ToList(); </code></pre> <p>and iterate through the result list.</p>
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    1. COGotta give you props for your linq query there! Works fantastic for what I need!
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