I am going through a ASP C# book and doing the tutorials. However I have encountered a problem. I have the following code that will list some events.
EventTracker.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="EventTracker.aspx.cs" Inherits="EventTracker" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"
http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
Event Tracker
h1
{
font-size: large;
}
Controls being monitored for change events:
List of events:
EventTracker.aspx.cs
using System;
using System.Collections;
using System.ComponentModel;
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;
public partial class EventTracker : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Log("<< Page_Load>>");
}
protected void Page_PreRender(object sender, EventArgs e)
{
//Find the control ID of the sender.
//This requires converting the Object type into a control class.
string ctrlName = ((Control)sender).ID;
Log(ctrlName + " Changed");
}
protected void Log(string entry)
{
lstEvents.Items.Add(entry);
//Select the last item to scroll the list so the most recent are visible
lstEvents.SelectedIndex = lstEvents.Items.Count - 1;
}
}
I am recieving the following error:
Error 1 'ASP.eventtracker_aspx' does not contain a definition for 'CtrlChanged' and no extension method 'CtrlChanged' accepting a first argument of type 'ASP.eventtracker_aspx' could be found (are you missing a using directive or an assembly reference?)
I am new to ASP and would like to understand why such an error is occurring so in future reference I know what is causing it.
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