How not cache an ASP.NET user control?

Question

I\'m using OutputCache in my page that has a user control, but I don\'t want to cache this specific user control because it\'s related to a user login (if I access the page,

Answer 1

Personally I use the VaryByCustom attribute to give logged in and logged out users different cached page views:

<%@ OutputCache VaryByCustom="IsLoggedIn" Duration="30" VaryByParam="*" %>

then in global.asax you put

public override string GetVaryByCustomString(HttpContext context,
    string arg)
{
    if (arg == "IsLoggedIn")
    {

        if (context.Request.IsAuthenticated)
        {
            return "Logged in: " + context.User.Identity.Name;
        }
        else
        {
            return "Not Logged In";
        }

    }
    else
    {
        return base.GetVaryByCustomString(context, arg);
    }

}

I am just going to throw this out there. How about the substitution control?

http://msdn.microsoft.com/en-us/library/ms228212.aspx

According to msdn website:

The Substitution control lets you create areas on the page that can be updated dynamically and then integrated into a cached page. ... The Substitution control offers a simplified solution to partial page caching for pages where the majority of the content is cached. You can output-cache the entire page, and then use Substitution controls to specify the parts of the page that are exempt from caching.

I have never used the substituion control personally, but I just happened to look it up the other day, and it sounded like it can somehow inject updated content into an otherwise cached page output.