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DataTable dt = (DataTable)Cache["rptPingFen"+strTaskID + Session["userEntID"].ToString()];
if (dt == null)
{
    dt = Reports.rptPingFen( strTaskID, Session["userEntID"].ToString() );
    string strCacheFile = Server.MapPath( "~/Cache/" + strTaskID + ".cache" );
    if (System.IO.File.Exists( strCacheFile ))
        Cache.Insert( "rptPingFen" + strTaskID + Session["userEntID"


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