asp textboxt visible=false postback

I have an ASP textbox in which I am storing a value in between postback.

When I set the visible property of the textbox to True the value remains between postback. When I set the visible property to False, the stored value in the textbox is not kept.

The view state property of the textbox it set to true.

I am not sure why this is happening, can anybody help?

Thanks
Mr_ShawAsked:
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Rahul Goel ITILSenior Consultant - DeloitteCommented:
You use Hidden fields for that...Do not use textboxes
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Mr_ShawAuthor Commented:
I thought hidden fields were only in HTML on ASP
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Mr_ShawAuthor Commented:
ah.. spotted it...

i'll give it go.
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Geoff BryanDeveloperCommented:
When you set the ASP textbox visible property to false, the server generates the page without the box, which is why any value is lost on postback. If you try to access a hidden textbox using javascript it will throw an error because as far as the browser is concerned the textbox simply doesn't exist.

To save a value on postback you need to replace the textbox with a 'HiddenField'. This exists on the page when rendered to the client browser, but is always hidden. Any value stored in it will be retaiined on poastback, but the user cannot see or edit the value.

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Mr_ShawAuthor Commented:
thanks
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