viewstate

ASP.NET MVC - Is there a way to simulate a ViewState?

由 笑着哭i 提交于 2019-11-27 01:59:01
问题 I have the following situation... In a certain View, the user must select the initial hour, the final hour and the weekday. But, I can't save this informations to DB 'cause I need to save my whole page and I need the primary key of the primary table, but that's not the point. So, while I don't save these data to DB, I'm saving to a Session. I was told to save to a cookie, but it appears that cookies have a size limit. So, I'm saving to a Session. Buuuut, I was also told that I could save

ASP.NET CheckBox does not fire CheckedChanged event when unchecking

由 ↘锁芯ラ 提交于 2019-11-27 01:04:41
问题 I have a CheckBox on an ASP.NET Content Form like so: <asp:CheckBox runat="server" ID="chkTest" AutoPostBack="true" OnCheckedChanged="chkTest_CheckedChanged" /> In my code behind I have the following method: protected void chkTest_CheckedChanged(object sender, EventArgs e) { } When I load the page in the browser and click the CheckBox it becomes checked, the page posts back, and I can see chkTest_CheckedChanged being called. When I then click the CheckBox again it becomes unchecked, the page

ViewState Vs Session … maintaining object through page lifecycle

由 ☆樱花仙子☆ 提交于 2019-11-27 00:51:39
问题 Can someone please explain the difference between ViewState and Session? More specifically, I'd like to know the best way to keep an object available (continuously setting members through postbacks) throughout the lifecycle of my page. I currently use Sessions to do this, but I'm not sure if it's the best way. For example: SearchObject searchObject; protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) { searchObject = new SearchObject(); Session["searchObject"] =

ASP.NET: Unable to validate data

由 China☆狼群 提交于 2019-11-27 00:48:45
问题 What is the cause of this exception in ASP.NET? Obviously it is a viewstate exception, but I can't reproduce the error on the page that is throwing the exception (a simple two TextBox form with a button and navigation links). FWIW, I'm not running a web farm. Exception Error Message: Unable to validate data. Error Source: System.Web Error Target Site: Byte[] GetDecodedData(Byte[], Byte[], Int32, Int32, Int32 ByRef) Post Data VIEWSTATE: /wEPDwULLTE4NTUyODcyMTFkZF96FHxDUAHIY3NOAMRJYZ+CKsnB

How to store list of object into ViewState

由 别来无恙 提交于 2019-11-26 23:21:32
问题 I have a list of type List<JobSeeker> . I want to store it in ViewState. How this can be done? private List<JobSeeker> JobSeekersList { get; set; } 回答1: Basically you only need to use the get , then on get you either get the posted data from view state, or set it for the first time on the view state. This is the more robust code to avoid all the checks on each call (is view state set, exist etc), and direct saved and use the view state object. // using this const you avoid bugs in mispelling

Does viewstate expire?

由 安稳与你 提交于 2019-11-26 23:14:20
问题 Let's say you have a aspx page that does not rely on session, but does rely on viewstate for persistance between postbacks. If a user is accessing this page, and leaves for a long lunch, will viewstate still be valid when he returns? 回答1: No ViewState is kept as part of the PostBack process. You can, however, override the Page class's SavePageStateToPersistenceMedium() and LoadPageStateFromPersistenceMedium(), to implement that behavior if desired. For more information read Understanding the

How to decode viewstate

由 ￡可爱￡侵袭症＋ 提交于 2019-11-26 21:50:58
I need to see the contents of the viewstate of an asp.net page. I looked for a viewstate decoder, found Fridz Onion's ViewState Decoder but it asks for the url of a page to get its viewstate. Since my viewstate is formed after a postback and comes as a result of an operation in an update panel, I cannot provide a url. I need to copy & paste the viewstate string and see what's inside. Is there a tool or a website exist that can help viewing the contents of viewstate? Use Fiddler and grab the view state in the response and paste it into the bottom left text box then decode. James Here's an

ASP.NET How ViewState works

由 岁酱吖の 提交于 2019-11-26 21:50:29
问题 I have a textbox and button on my .aspx page. The EnableViewState property of the textbox is set to false. But when I enter some text in the textbox and click the button the entered text is still present in the textbox. I expect the textbox to be blank since EnableViewState is set to false. Am I missing something? 回答1: Please check this Code Project article to better understand ViewState and Postback Data. It is something like : Why some controls retain values even after disabling the

Completely remove ViewState for specific pages

由 折月煮酒 提交于 2019-11-26 21:46:36
问题 I have a site that features some pages which do not require any post-back functionality. They simply display static HTML and don't even have any associated code. However, since the Master Page has a <form runat="server"> tag which wraps all ContentPlaceHolder s, the resulting HTML always contains the ViewState field, i.e: <input type="hidden" id="__VIEWSTATE" value="/wEPDwUKMjEwNDQyMTMxM2Rk0XhpfvawD3g+fsmZqmeRoPnb9kI=" /> EDIT: I tried both variants of setting EnableViewState on page level

Rendering other form by ajax causes its view state to be lost, how do I add this back?

由 天涯浪子 提交于 2019-11-26 18:51:05
I have <h:form> <h:commandLink action="#{my_fake_ajax_link}"> <h:outputText value="Link" /> <f:ajax render=":mydiv" /> </h:commandLink> </h:form> <h:panelGroup layout="block" id="mydiv"> <h:form> <h:commandLink action="#{mybean.delete(0)}"> <h:outputText value="Here" /> <f:ajax render="@form" /> </h:commandLink> </h:form> </h:panelGroup> When I click once on "my_fake_ajax_link", then I have to click twice on "delete" link. This is only an example. I don't have this real case. I have multiple forms on a page and I can't just add all of them in a single form. I checked what the problem is and it
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