调用非静态方法时出错

Question

I have this timer

System.Timers.Timer aTimer = new System.Timers.Timer();
aTimer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimerMethod);
aTimer.Interval = 5000;
aTimer.Enabled = true;

But when I call this method in timer code,

private void OnTimerMethod(object sender, ElapsedEventArgs e)
{
    Response.Write("text");
}

I get this error message

An exception of type 'System.Web.HttpException' occurred in System.Web.dll but was not handled in user code

How can I fix this ?

Update :
I see I'm doing wrong but how can I achieve doing this ?

Thanks in advance

Answer 1

I'm trying to make a reminder, so I'll pop some messages at the detected time

You cannot do this by simply writing extra data to a completed response context. The http life cycle doesn't allow for this , at least not in http 1.*. Instead, you would need to (one of):

• move all the timer code to the client and worry about it in javascript
• run ajax from the client and poll the server periodically
• establish a web-socket connection from the client to the server; this allows the server to push messages to the client without requiring a request, but requires an established and active TCP connection between client and server, and requires a different programming model for the web-socket server

Your best bet for a reminder is probably just the first one.