how to persist a class object when page PostBack

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3.00/5 (1 vote)

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Hi,

I have created a page WebForm.aspx and in Code behind file of WebForm.aspx and I have created an object of a class MyClass.cs.

Like

if(!Page.IsPostback) {
    objMyClass= new MyClass();
}

.

However when I click on button of WebForm.aspx page and try to access objMyClass object then it is set as null.

How to persist MyClass object when page PostBack?

One more thing is that MyClass is also resposnsible to create some other class object also.

Posted 3-Oct-10 21:03pm

amit_83

Updated 6-Oct-10 21:39pm

Dalek Dave

v3

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Dalek Dave 7-Oct-10 3:39am

Edited for Grammar and Readability.

3 solutions

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kaushal s · Answer 1 · 2010-10-03T21:17:00

Solution 1

you can serialize the class and can store it in viewState. so that viewState will preserve object during Page Postback.

also you can try to make static property and can strore assign it to property.

Posted 3-Oct-10 21:17pm

kaushal s

MalikRizwan · Answer 2 · 2010-10-03T21:37:00

Solution 2

Save your object in ViewState

make sure your class is serializable..

ViewState["__MyClass"] = objMyClass;

now on after page is loaded.. access viewstate to get your object back

MyClass objMyClass = ViewState["__MyClass"] as MyClass;

Posted 3-Oct-10 21:37pm

MalikRizwan

Updated 3-Oct-10 21:38pm

v2

BlackCat_RU · Answer 3 · 2010-10-06T20:55:00

Solution 4

All you need to do is write
Session['MyObject']=objMyClass;
Then retrieve it from Session['MyObject'] which is persistent nad I beleive no serialization is required

Posted 6-Oct-10 20:55pm

BlackCat_RU