ASP.Net/Development/Event Log
Get Event Entry from Event log (C#)
<source lang="csharp">
<%@ Page language="c#" src="EventReviewPage.aspx.cs" AutoEventWireup="false" Inherits="EventReviewPage" %> <HTML>
<body>
<form id="Form1" method="post" runat="server">
<asp:label id="lblResult" style="Z-INDEX: 100; LEFT: 32px; POSITION: absolute; TOP: 160px" runat="server" Width="674px" Height="16px" Font-Names="Verdana" Font-Size="Smaller" BorderStyle="Inset" BorderWidth="1px" BackColor="#FFFFC0"></asp:label><asp:textbox id="txtLog" style="Z-INDEX: 107; LEFT: 128px; POSITION: absolute; TOP: 32px" runat="server" Width="193px" Height="24px">Application</asp:textbox><asp:label id="Label2" style="Z-INDEX: 106; LEFT: 32px; POSITION: absolute; TOP: 40px" runat="server" Width="96px" Height="16px" Font-Names="Verdana" Font-Size="Smaller">Log:</asp:label><asp:textbox id="txtSource" style="Z-INDEX: 102; LEFT: 128px; POSITION: absolute; TOP: 64px" runat="server" Width="193px" Height="24px">ErrorTestLog_Page</asp:textbox><asp:label id="Label1" style="Z-INDEX: 103; LEFT: 32px; POSITION: absolute; TOP: 64px" runat="server" Width="96px" Height="16px" Font-Names="Verdana" Font-Size="Smaller">Source:</asp:label><asp:button id="cmdGet" style="Z-INDEX: 104; LEFT: 200px; POSITION: absolute; TOP: 104px" runat="server" Width="120px" Text="Get Entries" Font-Names="Verdana" Font-Size="Smaller"></asp:button><asp:checkbox id="chkAll" style="Z-INDEX: 105; LEFT: 336px; POSITION: absolute; TOP: 32px" runat="server" Width="204px" Height="16px" Text="Get All Entries for this Log (May Be Extremely Slow)" AutoPostBack="True" Font-Names="Verdana" Font-Size="Smaller"></asp:checkbox></form>
</body>
</HTML>
<%-- using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Diagnostics;
public class EventReviewPage : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblResult;
protected System.Web.UI.WebControls.TextBox txtLog;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.TextBox txtSource;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button cmdGet;
protected System.Web.UI.WebControls.CheckBox chkAll;
private void Page_Load(object sender, System.EventArgs e)
{
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
InitializeComponent();
base.OnInit(e);
}
private void InitializeComponent()
{
this.cmdGet.Click += new System.EventHandler(this.cmdGet_Click);
this.chkAll.CheckedChanged += new System.EventHandler(this.chkAll_CheckedChanged);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void chkAll_CheckedChanged(object sender, System.EventArgs e)
{
if (chkAll.Checked == true)
{
txtSource.Text = "";
txtSource.Enabled = false;
}
else
{
txtSource.Enabled = true;
}
}
private void cmdGet_Click(object sender, System.EventArgs e)
{
if (!EventLog.Exists(txtLog.Text))
{
lblResult.Text = "The event log " + txtLog.Text ;
lblResult.Text += " doesn"t exist.";
}
else
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
EventLog log = new EventLog(txtLog.Text);
foreach (EventLogEntry entry in log.Entries)
{
// Write the event entries to the page.
if (chkAll.Checked == true ||
entry.Source == txtSource.Text)
{
sb.Append("Entry Type: ");
sb.Append(entry.EntryType.ToString());
sb.Append("
Message: ");
sb.Append(entry.Message);
sb.Append("
Time Generated: ");
sb.Append(entry.TimeGenerated);
sb.Append("
");
}
lblResult.Text = sb.ToString();
}
}
}
}
--%>
</source>
Write to Event log in code behind (C#)
<source lang="csharp">
<%@ Page language="c#" src="ErrorTestLog.aspx.cs" AutoEventWireup="false" Inherits="ErrorTestLog" %> <HTML>
<body>
<form id="Form1" method="post" runat="server">
<asp:Label id="Label2" style="Z-INDEX: 106; LEFT: 144px; POSITION: absolute; TOP: 32px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="16px" Height="16px">B:</asp:Label>
<asp:TextBox id="txtA" style="Z-INDEX: 101; LEFT: 32px; POSITION: absolute; TOP: 32px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="97px" Height="20px"></asp:TextBox>
<asp:TextBox id="txtB" style="Z-INDEX: 102; LEFT: 160px; POSITION: absolute; TOP: 32px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="97px" Height="20px"></asp:TextBox>
<asp:Button id="cmdCompute" style="Z-INDEX: 103; LEFT: 280px; POSITION: absolute; TOP: 24px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="152px" Height="32px" Text="Divide A / B"></asp:Button>
<asp:Label id="Label1" style="Z-INDEX: 104; LEFT: 16px; POSITION: absolute; TOP: 32px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="16px" Height="16px">A:</asp:Label>
<asp:Label id="lblResult" style="Z-INDEX: 105; LEFT: 24px; POSITION: absolute; TOP: 80px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="592px" Height="96px"></asp:Label>
<asp:CheckBox id="chkLog" style="Z-INDEX: 107; LEFT: 456px; POSITION: absolute; TOP: 32px" runat="server" Font-Size="Smaller" Font-Names="Verdana" Width="240px" Height="24px" Text="Log errors to ProseTech log"></asp:CheckBox>
</form>
</body>
</HTML>
<%-- using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Diagnostics;
public class ErrorTestLog : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.TextBox txtA;
protected System.Web.UI.WebControls.TextBox txtB;
protected System.Web.UI.WebControls.Button cmdCompute;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label lblResult;
protected System.Web.UI.WebControls.CheckBox chkLog;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.cmdCompute.Click += new System.EventHandler(this.cmdCompute_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void cmdCompute_Click(object sender, System.EventArgs e)
{
try
{
decimal a, b, result;
a = Decimal.Parse(txtA.Text);
b = Decimal.Parse(txtB.Text);
result = a / b;
lblResult.Text = result.ToString();
}
catch (Exception err)
{
lblResult.Text = "Message: " + err.Message + "
";
lblResult.Text += "Source: " + err.Source + "
";
lblResult.Text += "Stack Trace: " + err.StackTrace;
lblResult.ForeColor = Color.Red;
// Write the information to the event log.
EventLog log;
if (chkLog.Checked == true)
{
log = new EventLog("ProseTech");
}
else
{
log = new EventLog();
}
log.Source = "ErrorTestLog_Page";
log.WriteEntry(err.Message, EventLogEntryType.Error);
}
}
}
--%>
</source>
