Viewstate in Session

[MattC]

With respect to Peter Bromberg's article (
http://www.eggheadcafe.com/articles/20040613.asp ) I wish to store my
viewstate info in the Session object rather than the cache (as it is per
user info). I have tried the following but am unable to serialize the
viewstate??

protected override void SavePageStateToPersistenceMedium(object viewState)
{
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = viewState;
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return Session[str];
}

TIA

MattC

 

[MattC]

I hunted around a bit and got this to work, however I am unsure of its
implications.

protected override void SavePageStateToPersistenceMedium(object viewState)
{
LosFormatter oLosFormatter = new LosFormatter();
StringWriter oStringWriter = new StringWriter();
oLosFormatter.Serialize(oStringWriter, viewState);
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = oStringWriter.ToString();
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
LosFormatter oLosFormatter = new LosFormatter();
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return oLosFormatter.Deserialize(Session[str].ToString());
}

 

[Alvin Bruney [MVP]]

that looks ok to me

--
Regards,
Alvin Bruney

I hunted around a bit and got this to work, however I am unsure of its
implications.

protected override void SavePageStateToPersistenceMedium(object viewState)
{
LosFormatter oLosFormatter = new LosFormatter();
StringWriter oStringWriter = new StringWriter();
oLosFormatter.Serialize(oStringWriter, viewState);
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = oStringWriter.ToString();
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
LosFormatter oLosFormatter = new LosFormatter();
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return oLosFormatter.Deserialize(Session[str].ToString());
}

With respect to Peter Bromberg's article (
http://www.eggheadcafe.com/articles/20040613.asp ) I wish to store my
viewstate info in the Session object rather than the cache (as it is per
user info). I have tried the following but am unable to serialize the
viewstate??

protected override void SavePageStateToPersistenceMedium(object
viewState)
{
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = viewState;
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return Session[str];
}

TIA

MattC

 

[MattC]

Is there anyway to place this information in the Cache instead (so I can set
an expiry) but where it is used per person. Using this method I realised
that the session will grow very large after a while and the session timeout
might not be quick enough.
At the moment it is appending the current Tick of the system clock, so each
request would use its own entry in the session.
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();

If I alter to:
string str = "VIEWSTATE_" + Request.UserHostAddress;
I can avoid this problem. However, what are the issue involved in resizing
the space required by an object in the Session.

TIA

MattC

that looks ok to me

--
Regards,
Alvin Bruney

I hunted around a bit and got this to work, however I am unsure of its
implications.

protected override void SavePageStateToPersistenceMedium(object
viewState)
{
LosFormatter oLosFormatter = new LosFormatter();
StringWriter oStringWriter = new StringWriter();
oLosFormatter.Serialize(oStringWriter, viewState);
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = oStringWriter.ToString();
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
LosFormatter oLosFormatter = new LosFormatter();
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return oLosFormatter.Deserialize(Session[str].ToString());
}

With respect to Peter Bromberg's article (
http://www.eggheadcafe.com/articles/20040613.asp ) I wish to store my
viewstate info in the Session object rather than the cache (as it is per
user info). I have tried the following but am unable to serialize the
viewstate??

protected override void SavePageStateToPersistenceMedium(object
viewState)
{
string str = "VIEWSTATE_" + Request.UserHostAddress + "_" +
DateTime.Now.Ticks.ToString();
Session[str] = viewState;
RegisterHiddenField("__VIEWSTATE_KEY", str);
RegisterHiddenField("__VIEWSTATE", "");
}
protected override object LoadPageStateFromPersistenceMedium()
{
string str = Request.Form["__VIEWSTATE_KEY"];
if (!str.StartsWith("VIEWSTATE_"))
{
throw new Exception("Invalid viewstate key:" + str);
}
return Session[str];
}

TIA

MattC