asp.net Hidden Fields 有用么？

atransformer

随便弄个label, visible = false 不就完了？

o2h2o

hidden field
就是 html 的 hidden field 的 server render 版本
是用来存数据的

和 label 的 用法不同

atransformer

原帖由 o2h2o 于 2011-3-29 15:51 发表
hidden field
就是 html 的 hidden field 的 server render 版本
是用来存数据的

和 label 的 用法不同

谢谢

garyyang

hidden fields are a bit like viewstate, their values are saved inside the html page when it renders. that's called client-side state management. (data won't be saved on server)

hidden field is useful for the following scenarios
1) remembering some parameters from the previous page, e.g. a selected user id
2) remembering some values received from the server, for JavaScript to proceed with on client's browser.

strictly speaking, it doesn't harm to use an invisible label, but from the security's perspective, using viewstate / hidden vars are more secure as the data are hashed.

乱码

visible是false的server control，webform不render的，这个element永远不会到browser上去，更不会是invisible.

flyspirit

Hidden field传到网页上后会有<input type="hidden"..../>

invisible Label在Browser端啥都没有。

如果你要用javascript操作传到网页上的数据，就要用hidden field.

典

A lot of options there.
(1) Hidden field is a little bit old, still works.
(2) Webstorage (html5?) sessionStorage / localStorage
(3) IndexedDB (Firefox 4 already has---so far no valid examples available, IE9 will support it in the future)
(4) Web SQL ( some browsers supported but it will be replaced by IndexedDB)
(5) Query string / session
(6) Add your Attributes to any elements

atransformer

原帖由 典 于 2011-3-31 11:03 发表
A lot of options there.
(1) Hidden field is a little bit old, still works.
(2) Webstorage (html5?) sessionStorage / localStorage
(3) IndexedDB (Firefox 4 already has---so far no valid examples availab ...

ａｓｐ．ｎｅｔ　的　ｖｉｅｗｓｔａｔｅ　还是用　Hidden field