viewstate

One of the major reasons for using webforms is the ease of being able to maintain viewstate. I would like to build an asp.net mvc application so what options do I have for maintaining viewstate? Kind regards ASP.NET MVC does not use ViewState in the traditional sense (that of storing the values of controls in the web page). Rather, the values of the controls are posted to a controller method. Once the controller method has been called, what you do with those values is up to you. ASP.NET MVC will persist the values of the controls long enough for you to validate them and (if needed) to round

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 posts back, however chkTest_CheckedChanged is not called. The process is repeatable, so once the

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"] = searchObject; } else { searchObject = (SearchObject)Session["searchObject"]; } } that allows me to use my

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 EVENTVALIDATION: /wEWBAK+8ZzHAgKOhZRcApDF79ECAoLch4YMeQ2ayv/Gi76znHooiRyBFrWtwyg= Exception Stack Trace at

Every now and then (once every day or so) we're seeing the following types of errors in our logs for an ASP.NET 3.5 application Invalid viewstate Invalid postback or callback argument Are these something that "just happens" from time-to-time with an ASP.NET application? Would anyone recommend we spend a lot of time trying to diagnose what's causing the issues? Well it depends. Invalid viewstate can happen for a variety of reasons. Viewstate is too big and has not finished rendering before a user causes a postback on the page. The fix is generally to disable all controls that trigger postbacks

Kind of a quick question: Is it possible to activate a viewstate from XAML? I have been only able to activate one from CS, using the VisualStateManager.GotoState() method. This would fix some of my MVVM issues if it were easily possible. Thanks If you are familiar with Blend behaviors, triggers, and actions there is a GoToStateAction which is a part of the Microsoft.Expression.Interactivity.Core namespace. You will have to reference the interactivity assemblies which are part of the Blend SDK . Once you have the references set up it's as easy as specifying the GoToStateAction to react to some