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aspx thread: Creating User Control
Message #1 by "Ganesh Ramamurthy" <r_ganesh76@h...> on Fri, 24 Jan 2003 04:28:28
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Dear all,
I have created a usercontrol. in the class, I have created a property to
store some values while the user enters values in a textbox within the
user control. But, however, each time a server side code is executed in
the form, the class of the usercontrol is getting initialized whereby the
values which were originally stored is getting cleared. How can i prevent
this from happening
Please help
Regards
Ganesh
Message #2 by "Arjen Oetomo" <arjeno@c...> on Mon, 27 Jan 2003 07:43:59
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Just like an aspx page, a usercontrol has to maintain state between
postbacks.
You can store values in the viewState after a state change, for example:
ViewState("myUserCtrlUserName") = userName
And on postback restore the values:
userName = ViewState("myUserCtrlUserName")
Keep in mind that only serializable datatypes can be stored in the
viewstate. Take a snapshot and store it in the ViewState and restore the
state of your control after each postback.
I hope this helps..
Arjen O.
> Dear all,
> I have created a usercontrol. in the class, I have created a property to
s> tore some values while the user enters values in a textbox within the
u> ser control. But, however, each time a server side code is executed in
t> he form, the class of the usercontrol is getting initialized whereby
the
v> alues which were originally stored is getting cleared. How can i
prevent
t> his from happening
> Please help
> Regards
G> anesh
Message #3 by "Rohit Arora" <rohit_arora@i...> on Mon, 27 Jan 2003 13:05:34 +0530
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Hi Arjen,
Can this be accomplished by "enableViewState=true"
peace
rohit
-----Original Message-----
From: Arjen Oetomo [mailto:arjeno@c...]
Sent: Monday, January 27, 2003 7:44 AM
To: ASP.NET
Subject: [aspx] Re: Creating User Control
Just like an aspx page, a usercontrol has to maintain state between
postbacks.
You can store values in the viewState after a state change, for example:
ViewState("myUserCtrlUserName") = userName
And on postback restore the values:
userName = ViewState("myUserCtrlUserName")
Keep in mind that only serializable datatypes can be stored in the
viewstate. Take a snapshot and store it in the ViewState and restore the
state of your control after each postback.
I hope this helps..
Arjen O.
> Dear all,
> I have created a usercontrol. in the class, I have created a property to
s> tore some values while the user enters values in a textbox within the
u> ser control. But, however, each time a server side code is executed in
t> he form, the class of the usercontrol is getting initialized whereby
the
v> alues which were originally stored is getting cleared. How can i
prevent
t> his from happening
> Please help
> Regards
G> anesh
Message #4 by "Arjen Oetomo" <arjeno@c...> on Mon, 27 Jan 2003 10:23:24
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Yes, enableViewState is set to true by default (on most Webcontrols) and
saves all values in controls as textboxes, etc... But, it doesnt save
custom properties on your userControl class.
As I understand he passes the value from the textbox to a property on his
class.. In this case you need to save the properties state "manually" in
the viewstate during postbacks.
(or store the values in a hidden control with enableViewState=true)
Arjen O.
> Hi Arjen,
Can this be accomplished by "enableViewState=true"
peace
rohit
-----Original Message-----
From: Arjen Oetomo [mailto:arjeno@c...]
Sent: Monday, January 27, 2003 7:44 AM
To: ASP.NET
Subject: [aspx] Re: Creating User Control
Just like an aspx page, a usercontrol has to maintain state between
postbacks.
You can store values in the viewState after a state change, for example:
ViewState("myUserCtrlUserName") = userName
And on postback restore the values:
userName = ViewState("myUserCtrlUserName")
Keep in mind that only serializable datatypes can be stored in the
viewstate. Take a snapshot and store it in the ViewState and restore the
state of your control after each postback.
I hope this helps..
Arjen O.
> Dear all,
> I have created a usercontrol. in the class, I have created a property to
s> tore some values while the user enters values in a textbox within the
u> ser control. But, however, each time a server side code is executed in
t> he form, the class of the usercontrol is getting initialized whereby
the
v> alues which were originally stored is getting cleared. How can i
prevent
t> his from happening
> Please help
> Regards
G> anesh
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