postback, viewstate, tampering with values

akthar · September 21st, 2004, 08:22 AM

Hi
i have a text box , after postback i want it to hold a different value to the one that was entered by the user. Is this possible?

i understand the area i want info on may be about manipulating the data in the viewstate collection

<asp:TextBox id="txtHeading" runat="server" Width="376px" EnableViewState="False"></asp:TextBox>

A

katsarosj · September 21st, 2004, 08:42 AM

Absolutely. Something like this:
----------------------------------------
If IsNumeric(txtHeading.Text) Then
txtHeading.Text += 5
End If
----------------------------------------

Of course this is for a numeric value. If you want a string, date, etc. you will have to modify it accordingly.

J

bmains · September 21st, 2004, 11:45 AM

Hey,

You could put code in Page_Init and Page_Load, for when the page posts back.

Brian

sara_1981 · September 21st, 2004, 11:29 PM

Hi,
yeah, you could put code in Init of page but you should attend that, when page is initualizing, your controls which is in this page is still not initualized and therefore if you want to change anything for instance the text of label in that, it couldn't know it.

Regards
Sara

cfouquet · September 22nd, 2004, 07:26 AM

BTW, why do you have EnableViewState = false.
I am pretty sure that's not what your want

bmains · September 22nd, 2004, 07:28 AM

Hey,

With EnableViewState="False", you would have to retain the value through another mechanism, such as the Page's ViewState, or the Cache or Session.

Brian