MVC :: Access The Session On The Controller?
Jan 30, 2010
I am trying to get into grips with AJAX/JQuery and MVC. i need to access the session on the controller. This doesnt seem to be initialised at the constructor level but there needs to be a way I can store items in the session in the constructor depending on the parameter values (an extra constructor is written here) I am also doing unit testing here, which has been provided by 3rd party and they are using this extra constructor.
So the idea here is that when the page is loaded, JQuery will request a collection of items (which will be stored in session) and also be able to post to the page so items are added into the collection too. So, what is the best way here to get access to the session in the constructor of a controller?
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Jan 13, 2010
I built a base controller class inherits from Controller class to add some custom behavior to all controllers which will inherit from this base class.
My issue is when I try to access HTTPContext and Session objects in my custom base class, they are always null.
Am I doing something wrong or need missing something?
My custom base class definition:
public class ApplicationControllerBase : Controller
controllers classes definition:
public class HomeController : ApplicationControllerBase
using ASP.NET MVC 1, .NET 3.5.
UPDATE:
It seems the issue is I try to access HTTPContext in the constructor while HTTPContext is not ready yet, I tried it in the OnActionExecuted event handler and it works fine.
My question is what is the best place to access Session object in my custom controller class, that will guarantee executing my code with all controllers.
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May 30, 2010
I have a filter on my MVC web site. I display some records in a few different controller actions but when moving from one action to another I want to apply those filter values.
How can I persist values from controller to controller?
Should I use Session? TempData?
I am using Structure Map for IOC.
Maybe I could have a class that contains a Property for each Session Value that I use in my application and inject it on the controllers that need session?
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Feb 19, 2011
I'm calling an action from another controller using this code
[Code]....
But inside "ApproveOperation" action, I needed the Session variables. It seems when I called it from another controller (not the owning controller), the Session variables can not be accessed (null value).How can I get the same Session variables just like it was called from the owning controller?
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Feb 24, 2011
I am creating an ASP.NET application that allows users to edit and insert data that is persisted in a SQL Server database.I would like to implement a controller class that handles queries for certain entities, caches results and triggers events when data is inserted or updated.I need one of these controller classes for each entity in my data model.What I'm unsure of is how to create a singleton class of this sort that different user sessions can access.
For example,I have a Employee entity in my data model.I would like to have an EmployeeController class that handles retrieving the employees from the database, sends inserts and updates to the database,keeps a cache of all employees and triggers events when an employee is inserted or updated.Objects in other user sessions could then listen and respond to these events.
Am I on the right track?Should I be using the ASP.NET MVC framework to accomplish this?How do I instantiate these controller classes when the first user needs them and have subsequent concurrent users access the same class?
EDIT:I've been researching the idea of a controller class as an anti-pattern since @TomTom's answer.I'm not convinced one way or the other.I still need an answer to question #3 above.Let's just drop the specific idea of a controller class for now. How do I create any class that is:accessible by multiple user sessions,allows only one instance,is deleted if there are no user sessions,and triggers events that other classes can listen to.
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Jan 18, 2011
I am new to MVC. Now I have an application needs to be built using MVC. I want to show all the information in one view(or form), but the data are coming from different controllers. how the system knows the data in textbox1 goes to controller1 and the data from database in controller2 returns to textbox2 in the same view(or form)?
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Dec 28, 2010
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Nov 17, 2010
How can I access the HttpServerUtility instance in ASP.NET MVC controller?
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Mar 6, 2011
My question is if i put a dropdownlist on my webpage:
[Code]....
How do i acces this from my controller. If for example i want to make it visible or not?
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Jan 17, 2011
I have a masterpage on which i displays groups that user can access now i want to gets its selected value in other controllers for saving with the records. I want to know if it is possible in asp.net mvc 2 and if not then what is the way around for it
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Apr 9, 2010
i have a website where i provicde a link. On clicking the link a controller action method is called to generate a zip file after creation of zip file is done, i show the link to download the zip file by replacing the link to create a zip with the link to download the zip.
the problem is that after zip file creation is over and link is shown, when user clicks on the link to download the zip file, they are sent to login. After providing correct credentials in the login page they are prompted to download the zip file. they sould not be sent to the login page. In the action to generate zip file i haven't abondoned the session or haven't not done anything that abondons the session.
the user should not be sen't to login page after successful creation of zip file user should be able to download the file without login. i search internet on this problem, but i did not find any solution. In one of the blog written by hanselman i found this statement that creates the problem with the session: Is some other thing like an Ajax call or IE's Content Advisor simultaneously hitting the default page or login page and causing a race condition that calls Session.Abandon? (It's happened before!)
so i thought there might be some problem with ajax call that causes the session to expire, but i don't know what is happening? it's like this after users click on the link to create zip file the zip file is created successfully but the session gets expired. this is not what i want. Why does the session has to get expired after making a jquery post call to controller action to create a zip file? i hope u understand the problem.
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Nov 22, 2010
I have the following two pages. One is a search page that have a few listbox/textbox/and dropdownlist. The other will be the result page that take from session those 3 data and using an if/else statement to sort out some detail. After that it will form an access/sql selectcommand to search the database base on that 3 criteria. But for some weird reason only the first part of my if and else statement work. Can anyone check and help me out why the rest of the if/else doesn't work. Or point me to another direction?
---------------------Search.aspx-----------------------------
[Code]....
-------------------SearchResult.aspx-----------------------
[Code]....
[Code]....
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Nov 6, 2010
my MVC2 delete and only my delete controller is refusing to return any class information. Its really similar to my edit function and the views are all auto-generated so I don't see the problem.
Function Delete(ByVal id As Integer) As ActionResult
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Dec 7, 2010
I have a pagemethod defined with the attribute [WebMethod]. The pagemethod accesses the session with no problem (HttpContext.Current.Session).
However I just read somewhere that in order to access the session in a WebMethod, you need to define it like so: [WebMethod(EnableSession=true)]
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Aug 16, 2010
I have a simple model where a Person has Gifts. I have a view which is a list of Gifts belonging to one Person.
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My Gift List controller knows the PersonID I want to pass but the view doesn't.
How do I pass this PersonID from my Gift List controller to my Gift Create controller via the Gift List view? Or is there a better way to do this?
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Apr 20, 2010
I want to access the session value at client side.
Code:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
btnGetSessionValue.Attributes.Add("onclick", "javascript:return GetSessionValue();");
}
}
[code]...
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Mar 18, 2011
I've my ASP.Net HTML 5 Application, Which have the image byte array in Session, I'm using the Latest 5.X C# facebook SDK from CodePlex.
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Here is my Code.
[code].....
Now pls give me some suggestion, Where I'm missing, How can I access my Application Session.
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Feb 4, 2010
I have 2 projects in my solution.
MVC Web application
Class library
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protected void Session_Start(object sender, EventArgs args)
{
HttpContext.Current.Session["DomainName"] = Request.Url.Host;
}
In the class library I'm trying to get the value from the HttpContext.Session, but HttpContext.Session keeps coming up null.
[code]...
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Mar 9, 2010
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while(int progress = DoWork() && progress <= 100 ){
Session["Progress"] = progress;
}
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context.Response.Write(Session["progress"].toString());
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Apr 26, 2010
I'm building a Javascript application and eash user has an individual UserSession. The application makes a bunch of Ajax calls. Each Ajax call needs access to a single UserSession object for the user.
Each Ajax call needs a UserSession object.
Data in the UserSession object is unique to each user.
Originally, during each Ajax call I would create a new UserSession object and it's data members were stored in the ASP.NET Session. However, I found that the UserSession object was being instantiated a lot. To minimize the construction of the UserSession object, I wrapped it in a Singleton pattern and sychronized access to it.
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Here is the way I'm currently synchronizing access to the object. Is there a better way than using "lock"... should be be locking on the HttpContext.Session object?
[code]...
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Sep 21, 2010
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Oct 14, 2010
in my web app users login to website normally and they have tagged in user table in database as online user in Session_End i want to log them outIn Session_End i have no access to HttpContext.Current.Session or Session only they are both null how can i access to session variable at (Session_End) event.
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Oct 29, 2010
I want to access the user session from a web method. But when I check for the session object, its nothing! How can I access the current user's session from the webmethod?
My code:
<System.Web.Script.Services.ScriptService()> _
<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _.......
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Oct 3, 2010
I am putting together a small database for recording stock movement.I have a table which will hold
StockID
StockItem
QtyInStrock
I want the user to enter in a textbox the number required from stock then do the subtraction before updating the QtyInStockWhat is the best approach for doing this.
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