c# page level global object postback

[Marty U.]

How can you declare an object that is global to a page even on postbacks?

I currently have something like this

MyObject m;

throughout the page on the initial load everything works fine but on
postback anything referencing m I get NullReference.

How can I declare an object to have page level scope through postback.

Thanks

[Cowboy (Gregory A. Beamer) - MVP]

The easiest is to stick the value into ViewState:

ViewState["ValueIWishToKeep"] = value;

You can then pull it back out of ViewState, remembering to cast it out as
the type you wish it to be:

value = ViewState["ValueIWishToKeep"].ToString();

for example.

Remember that web apps are stateless. The other option is session, but this
makes it "global" to all pages.
---

Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

***************************
Think Outside the Box!
***************************

"Marty U." wrote:

How can you declare an object that is global to a page even on postbacks?

I currently have something like this

MyObject m;

throughout the page on the initial load everything works fine but on
postback anything referencing m I get NullReference.

How can I declare an object to have page level scope through postback.

Thanks

[bruce barker]

unless your app is on the local lan, you should avoid using ViewState and
increasing the payload. you should implement some sort of server based
session support. you can store the session key in viewstate.

-- bruce (sqlwork.com)
"Cowboy (Gregory A. Beamer) - MVP" <No************@comcast.netNoSpamM> wrote
in message news:89**********************************@microsof t.com...
| The easiest is to stick the value into ViewState:
|
| ViewState["ValueIWishToKeep"] = value;
|
| You can then pull it back out of ViewState, remembering to cast it out as
| the type you wish it to be:
|
| value = ViewState["ValueIWishToKeep"].ToString();
|
| for example.
|
| Remember that web apps are stateless. The other option is session, but
this
| makes it "global" to all pages.
|
|
| ---
|
| Gregory A. Beamer
| MVP; MCP: +I, SE, SD, DBA
|
| ***************************
| Think Outside the Box!
| ***************************
|
| "Marty U." wrote:
|
| > How can you declare an object that is global to a page even on
postbacks?
| >
| > I currently have something like this
| >
| > MyObject m;
| >
| > throughout the page on the initial load everything works fine but on
| > postback anything referencing m I get NullReference.
| >
| > How can I declare an object to have page level scope through postback.
| >
| > Thanks

[Kikoz]

Hi.

If it's a light weight object and don't do much at initialization you can
declare it as a global variable in your Page's class and instantiate every
time page loads. But that would highly depend on particular situation.

Hope it helps,
Kikoz
"Marty U." <Ma****@discussions.microsoft.com> wrote in message
news:AA**********************************@microsof t.com...

How can you declare an object that is global to a page even on postbacks?

I currently have something like this

MyObject m;

throughout the page on the initial load everything works fine but on
postback anything referencing m I get NullReference.

How can I declare an object to have page level scope through postback.

Thanks

[Vanni Tomezzoli]

You can decleare that variable as static, e.g.

static MyObject m;

--
Vanni Tomezzoli
S. Donato Mil., Milano, Italy
http://xoomer.virgilio.it/vtomezzo
"Marty U." <Ma****@discussions.microsoft.com> ha scritto nel messaggio
news:AA**********************************@microsof t.com...

How can you declare an object that is global to a page even on postbacks?

I currently have something like this

MyObject m;

throughout the page on the initial load everything works fine but on
postback anything referencing m I get NullReference.

How can I declare an object to have page level scope through postback.

Thanks