缓存过期不回调，这真的让人很郁闷

[zyug]

来看一个最简单的
void Application_End(object sender, EventArgs e)
{
// 在应用程序关闭时运行的代码

}

void Application_Error(object sender, EventArgs e)
{
// 在出现未处理的错误时运行的代码

}

void Session_Start(object sender, EventArgs e)
{
// 在新会话启动时运行的代码

}

void Session_End(object sender, EventArgs e)
{
// 在会话结束时运行的代码。
// 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
// InProc 时，才会引发 Session_End 事件。如果会话模式设置为 StateServer
// 或 SQLServer，则不会引发该事件。

}


static void onRemove(string key, Object item, CacheItemRemovedReason reason)
{


StreamWriter sw = File.AppendText(HttpContext.Current.Server.MapPath(".") + "\\IPRecord.txt");
sw.Write("key:");
sw.Write(key);
sw.Write(" value:");
sw.Write(item.ToString());
sw.Write(" 移除 时间: ");
sw.Write(System.DateTime.Now.ToString());
sw.Write(".");
sw.Write(System.DateTime.Now.Millisecond.ToString());
sw.WriteLine("");
sw.Flush();
sw.Close();

HttpRuntime.Cache.Insert("Key", DateTime.Now, null, DateTime.Now.AddSeconds(10),
Cache.NoSlidingExpiration, CacheItemPriority.Default,
new CacheItemRemovedCallback(onRemove));


}

void Application_Start(Object sender, EventArgs e)
{
StreamWriter sw = File.AppendText(HttpContext.Current.Server.MapPath(".") + "\\IPRecord.txt");
sw.Write("key:");
sw.Write(" Key ");
sw.Write(" value:");
sw.Write(DateTime.Now.ToString());
sw.Write(" 建立 时间: ");
sw.Write(System.DateTime.Now.ToString());
sw.Write(".");
sw.Write(System.DateTime.Now.Millisecond.ToString());
sw.WriteLine("");
sw.Flush();
sw.Close();

HttpRuntime.Cache.Insert("Key", DateTime.Now, null, DateTime.Now.AddSeconds(10),
Cache.NoSlidingExpiration, CacheItemPriority.Default,
new CacheItemRemovedCallback(onRemove));
}


//
运行

结果 IPRecord.txt中就一条,无论多长时间就一条,只有建立时的日志

key: Key value:2008-1-11 9:31:16 建立 时间: 2008-1-11 9:31:16.859


没脾气了.把MSDN的例子拷到vs2005里面,把时间调成10秒过期，方便调试.....

public static class ReportManager
{
private static bool _reportRemovedFromCache = false;
static ReportManager()
{ }

public static String GetReport()
{
lock (typeof(ReportManager))
{
if (HttpContext.Current.Cache["MyReport"] != null)
return (string)HttpRuntime.Cache["MyReport"];
else
{
CacheReport();
return (string)HttpRuntime.Cache["MyReport"];
}
}
}

public static void CacheReport()
{
lock (typeof(ReportManager))
{
HttpContext.Current.Cache.Add("MyReport",
CreateReport(), null, DateTime.Now.AddSeconds(10),
TimeSpan.Zero,
System.Web.Caching.CacheItemPriority.Default,
ReportRemovedCallback);

StreamWriter sw = File.AppendText(HttpContext.Current.Server.MapPath(".") + "\\IPRecord.txt");
//记录建立
sw.Write(" MyReport 创建 时间: ");
sw.Write(System.DateTime.Now.ToString());
sw.Write(".");
sw.Write(System.DateTime.Now.Millisecond.ToString());
sw.WriteLine("");
sw.Flush();
sw.Close();
}
}

private static string CreateReport()
{
System.Text.StringBuilder myReport =
new System.Text.StringBuilder();
myReport.Append("Sales Report<br />");
myReport.Append("2005 Q2 Figures<br />");
myReport.Append("Sales NE Region - $2 million<br />");
myReport.Append("Sales NW Region - $4.5 million<br />");
myReport.Append("Report Generated: " + DateTime.Now.ToString()
+ "<br />");
myReport.Append("Report Removed From Cache: " +
_reportRemovedFromCache.ToString());
return myReport.ToString();
}

public static void ReportRemovedCallback(String key, object value,
CacheItemRemovedReason removedReason)
{
//记录移除
StreamWriter sw = File.AppendText(HttpContext.Current.Server.MapPath(".") + "\\IPRecord.txt");
sw.Write("key:");
sw.Write(key);
sw.Write(" value:");
sw.Write(value.ToString());
sw.Write(" 移除 时间: ");
sw.Write(System.DateTime.Now.ToString());
sw.Write(".");
sw.Write(System.DateTime.Now.Millisecond.ToString());
sw.WriteLine("");
sw.Flush();
sw.Close();

_reportRemovedFromCache = true;
CacheReport();
}
}


结果一样..
还是只能跟踪到缓存建立时的记录

....什么破玩意,真怀疑这些人有没有测试

[ydlchina]

顶顶

[zyug]

顶者有分，要是闲分少还可以再加

[nj_1st_excellence]

接分哦～

[zhuanshen712]

那我就顶！

[rangeon]

帮顶

[boblaw]

LZ不要激動，把你的global.asax改為如下內容，你再試一下，就會有效果了。
之所以你的衹記錄一次，是因為除了第一次，其他每次執行都出錯了。出錯的問題在於HttpContext.Current值為null

<%@ Application Language="C#" %>
<%@ Import Namespace="System.IO" %>
<script runat="server">

    public static readonly string path = HttpContext.Current.Server.MapPath(".") + "\\IPRecord.txt";
    void Application_Start(object sender, EventArgs e) 
    {
        StreamWriter sw = File.AppendText(path);
        sw.Write("key:");
        sw.Write("   Key   ");
        sw.Write("           value:");
        sw.Write(DateTime.Now.ToString());
        sw.Write("     建立   时间:   ");
        sw.Write(System.DateTime.Now.ToString());
        sw.Write(".");
        sw.Write(System.DateTime.Now.Millisecond.ToString());
        sw.WriteLine("");
        sw.Flush();
        sw.Close();

        HttpRuntime.Cache.Insert("Key", DateTime.Now, null, DateTime.Now.AddSeconds(10),
                                Cache.NoSlidingExpiration, CacheItemPriority.Default,
                                new CacheItemRemovedCallback(onRemove));
    }
    static void onRemove(string key, Object item, CacheItemRemovedReason reason)
    {


        StreamWriter sw = File.AppendText(path);
        
        sw.Write("key:");
        sw.Write(key);
        sw.Write("           value:");
        sw.Write(item.ToString());
        sw.Write("     移除   时间:   ");
        sw.Write(System.DateTime.Now.ToString());
        sw.Write(".");
        sw.Write(System.DateTime.Now.Millisecond.ToString());
        sw.WriteLine("");
        sw.Flush();
        sw.Close();

        HttpRuntime.Cache.Insert("Key", DateTime.Now, null, DateTime.Now.AddSeconds(10),
                                Cache.NoSlidingExpiration, CacheItemPriority.Default,
                                new CacheItemRemovedCallback(onRemove));


    } 

    void Application_End(object sender, EventArgs e) 
    {
        //  在应用程序关闭时运行的代码

    }
        
    void Application_Error(object sender, EventArgs e) 
    { 
        // 在出现未处理的错误时运行的代码

    }

    void Session_Start(object sender, EventArgs e) 
    {
        // 在新会话启动时运行的代码

    }

    void Session_End(object sender, EventArgs e) 
    {
        // 在会话结束时运行的代码。 
        // 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
        // InProc 时，才会引发 Session_End 事件。如果会话模式设置为 StateServer 
        // 或 SQLServer，则不会引发该事件。

    }
</script>

[vvsamln]

貌似你是把日志文件覆盖写入了

[SeerMi]

不用考虑,来接了

[aofengdaxia]

帮你顶了

[zyug]

果真如此..还是黑马兄历害，

一时被气晕，果真是httpcontext.current对像为null

结贴

[boblaw]

另，我在6樓發的代碼public static readonly string path可改為private