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    private void SetPageNoCache()
        {
            Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
        }
    (1)   Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
    (2) HTML·½·¨
        <meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">
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