/// <summary>
/// Saves an object or piece of data to the Caching System.
/// </summary>
public static void Save(object Obj, string ID, CachePersistance Persistance, DateTime ExpirationDate)
{
switch (Persistance)
{
// ** SESSION SPECIFIC: This means that an object is stored using the current session ID
// in addition to the ID passed. This is to prevent the data from being accessed once
// the session has expired. If it is a requirement that the data be retrievable after
// the session is expired, the Machine persistance should be use.
// Saves to the session by a SESSION SPECIFIC key, then is backed up by a cookie.
case CachePersistance.Session:
WriteSession(Obj, ID);
WriteCookie(Obj, HttpContext.Current.Session.SessionID + "_" + ID, ExpirationDate);
break;
// Saves to the session only, no cookie back up.
case CachePersistance.SessionNoCookie:
WriteSession(Obj, ID);
break;
// Saves the object to the system cache by a SESSION SPECIFIC key.
// Then saves the key to the session backed up by a cookie.
case CachePersistance.SessionCache:
string strCacheId = HttpContext.Current.Session.SessionID + "_" + ID;
WriteCache(Obj, strCacheId, ExpirationDate);
WriteSession(strCacheId, ID);
WriteCookie(strCacheId, ID, ExpirationDate);
break;
// Saves to the session and is backed up by a cookie. (not session specific)
case CachePersistance.Machine:
WriteSession(Obj, ID);
WriteCookie(Obj, ID, ExpirationDate, DateTime.Now.AddYears(5));
break;
case CachePersistance.MachineOnly:
WriteCookie(Obj, ID, ExpirationDate, DateTime.Now.AddYears(5));
break;
}
// ** Ty, this is the orginal code for your reference. Just in case I forgot anything...
// System.Web.HttpContext context = System.Web.HttpContext.Current;
// if(Persistance >= CachePersistance.Session && Persistance != CachePersistance.MachineOnly) {
// context.Session[ID] = Obj;
// }
//
// if(Persistance == CachePersistance.Session) {
// context.Response.Cookies[context.Session.SessionID + "_" + ID].Value = SerializationTools.SerializeObject(Obj);
// if(ExpirationDate == SqlConvert.ToDateTime(null)) ExpirationDate = DateTime.Now.AddDays(1);
// context.Response.Cookies[context.Session.SessionID + "_" + ID].Expires = ExpirationDate;
// }
//
// if(Persistance >= CachePersistance.Machine) {
// context.Response.Cookies[ID].Value = SerializationTools.SerializeObject(Obj);
// if(ExpirationDate == SqlConvert.ToDateTime(null)) ExpirationDate = DateTime.Now.AddYears(5);
// context.Response.Cookies[ID].Expires = ExpirationDate;
// }
}
/// <summary>
/// Retrieves an object or piece of data from the Caching System.
/// </summary>
public static object Get(string ID, CachePersistance Persistance)
{
object obj = null;
System.Web.HttpContext context = System.Web.HttpContext.Current;
if (Persistance == CachePersistance.SessionCache)
{
string strCacheId;
try {
strCacheId = context.Session[ID].ToString();
context.Trace.Write("retrieved cache id from session...");
} catch {
// If the cache id isn't found, build one out of the session id and the id passed.
strCacheId = context.Session.SessionID + "_" + ID;
}
context.Trace.Write("strCacheId = " + strCacheId);
try { obj = SerializationTools.DeserializeObject(context.Cache[strCacheId].ToString()); } catch { obj = null; }
}
else
{
// This is the original code before the SessionCache Persistance.
if (Persistance >= CachePersistance.Session)
{
obj = context.Session[ID];
}
if (Persistance == CachePersistance.Session && obj == null)
{
if (context.Request.Cookies.Get(context.Session.SessionID + "_" + ID) == null)
{
obj = null;
}
else
{
obj = SerializationTools.DeserializeObject(context.Request.Cookies[context.Session.SessionID + "_" + ID].Value);
}
}
if (Persistance >= CachePersistance.Machine && obj == null)
{
try {
obj = SerializationTools.DeserializeObject(context.Request.Cookies[ID].Value);
} catch {
obj = null;
}
}
}
return(obj);
}
/// <summary>
/// Retrieves an object or piece of data from the Caching System.
/// </summary>
public static object Get(string ID,CachePersistance Persistance)
{
object obj = null;
System.Web.HttpContext context = System.Web.HttpContext.Current;
if (Persistance == CachePersistance.SessionCache) {
string strCacheId;
try {
strCacheId = context.Session[ID].ToString();
context.Trace.Write("retrieved cache id from session...");
} catch {
// If the cache id isn't found, build one out of the session id and the id passed.
strCacheId = context.Session.SessionID+ "_" +ID;
}
context.Trace.Write("strCacheId = " +strCacheId);
try { obj = SerializationTools.DeserializeObject(context.Cache[strCacheId].ToString()); } catch { obj = null; }
} else {
// This is the original code before the SessionCache Persistance.
if(Persistance >= CachePersistance.Session) obj = context.Session[ID];
if(Persistance == CachePersistance.Session && obj == null) {
if (context.Request.Cookies.Get(context.Session.SessionID + "_" + ID) == null)
obj = null;
else
{
obj = SerializationTools.DeserializeObject(context.Request.Cookies[context.Session.SessionID + "_" + ID].Value);
}
}
if(Persistance >= CachePersistance.Machine && obj == null) {
try {
obj = SerializationTools.DeserializeObject(context.Request.Cookies[ID].Value);
} catch {
obj = null;
}
}
}
return (obj);
}
/// <summary>
/// Overload for the save method.
/// Sends null as the expiration date.
/// </summary>
public static void Save(object Obj, string ID, CachePersistance Persistance)
{
Save(Obj, ID, Persistance, SqlConvert.ToDateTime(null));
}
/// <summary>
/// Overload for the save method.
/// Sends null as the expiration date.
/// </summary>
public static void Save(object Obj, string ID, CachePersistance Persistance)
{
Save(Obj, ID, Persistance, SqlConvert.ToDateTime(null));
}
/// <summary>
/// Saves an object or piece of data to the Caching System.
/// </summary>
public static void Save(object Obj, string ID, CachePersistance Persistance, DateTime ExpirationDate)
{
switch (Persistance) {
// ** SESSION SPECIFIC: This means that an object is stored using the current session ID
// in addition to the ID passed. This is to prevent the data from being accessed once
// the session has expired. If it is a requirement that the data be retrievable after
// the session is expired, the Machine persistance should be use.
// Saves to the session by a SESSION SPECIFIC key, then is backed up by a cookie.
case CachePersistance.Session:
WriteSession(Obj, ID);
WriteCookie(Obj, HttpContext.Current.Session.SessionID + "_" + ID, ExpirationDate);
break;
// Saves to the session only, no cookie back up.
case CachePersistance.SessionNoCookie:
WriteSession(Obj, ID);
break;
// Saves the object to the system cache by a SESSION SPECIFIC key.
// Then saves the key to the session backed up by a cookie.
case CachePersistance.SessionCache:
string strCacheId = HttpContext.Current.Session.SessionID + "_" + ID;
WriteCache(Obj, strCacheId, ExpirationDate);
WriteSession(strCacheId, ID);
WriteCookie(strCacheId, ID, ExpirationDate);
break;
// Saves to the session and is backed up by a cookie. (not session specific)
case CachePersistance.Machine:
WriteSession(Obj, ID);
WriteCookie(Obj, ID, ExpirationDate, DateTime.Now.AddYears(5));
break;
case CachePersistance.MachineOnly:
WriteCookie(Obj, ID, ExpirationDate, DateTime.Now.AddYears(5));
break;
}
// ** Ty, this is the orginal code for your reference. Just in case I forgot anything...
// System.Web.HttpContext context = System.Web.HttpContext.Current;
// if(Persistance >= CachePersistance.Session && Persistance != CachePersistance.MachineOnly) {
// context.Session[ID] = Obj;
// }
//
// if(Persistance == CachePersistance.Session) {
// context.Response.Cookies[context.Session.SessionID + "_" + ID].Value = SerializationTools.SerializeObject(Obj);
// if(ExpirationDate == SqlConvert.ToDateTime(null)) ExpirationDate = DateTime.Now.AddDays(1);
// context.Response.Cookies[context.Session.SessionID + "_" + ID].Expires = ExpirationDate;
// }
//
// if(Persistance >= CachePersistance.Machine) {
// context.Response.Cookies[ID].Value = SerializationTools.SerializeObject(Obj);
// if(ExpirationDate == SqlConvert.ToDateTime(null)) ExpirationDate = DateTime.Now.AddYears(5);
// context.Response.Cookies[ID].Expires = ExpirationDate;
// }
}
