I have the Global.asax like the code below:
public class MvcApplication : System.Web.HttpApplication
{
public static void RegisterRoutes(RouteCollection routes)
[code]...
I just having some query regarding Garbage collection. when this would be performed. It sense that whether it would be called while executing the each page or some other time.?
View 4 RepliesFor a web application developed on ASP.NET, we are finding that for user control files (ascx) we are returning long strings as a result of method calls. These are embedded in the ascx pages using the special tags <% %>When performing memory dump analysis for the application, we find that many of those strings are not being garbage collected. Also, the ascx pages are compiled to temporary DLLs and they are held in memory. Is this responsible for causing the long strings to remain in memory and not be garbage collected ?
View 2 RepliesI'm new to LINQ and have a problem with my query not showing me the Table Collection. I manually created my Cart class and specified the table attributes on each property (works fine for inserting records via LINQ see below). DataContext dc = new DataContext(Conn);
var q = (from c in dc.NOTABLES?? where ((c.UserID == userID)) orderby c.CreateDateTime Based on examples I would expect to see dc.Cart But I don't, so I tried to access it via dc.GetTable<Cart>() which at least gets me data but doesn't seem to convert the rows to my Cart object since this:
foreach (var cart in q) Log.Info("UserID: " + cart.UserID + " CartID: " + cart.ID.ToString());
blows up with a "Specified Cast is Not Valid" exception.
No Problem Inserting Also, I had no problem inserting data into the database:
DataContext dc = new DataContext(Conn);
Table<Cart> Carts = dc.GetTable<Cart>();
Cart aCart = new Cart();
aCart.UserID = userId;
aCart.Description = description;
aCart.CreateDateTime = System.DateTime.Now;
aCart.UpdateDateTime = System.DateTime.Now;
Carts.InsertOnSubmit(aCart);
Carts.Context.SubmitChanges();
I'm trying to use linq to sql for my project (very short deadline), and I'm kind of in a bind. I don't know the best way to have a data context handy per request thread. I want something like a singleton class from which all my repository classes can access the current data context. However, singleton class is static and is not thread-safe and therefore not suitable for web apps. I want something that would create a data context at the beginning of the request and dispose of it along with the request
View 1 RepliesI'm running Visual Web Developer 2010 Express on Windows XP and I'm having some trouble linking my DataContext to a control.If I create a new "Web Site", add a new LINQ to SQL Class and add the database tables I want, then add a Control such as FormView and choose a new LINQ Data Source Type; my DataContext I created is visible in the list and all work OK.If I do the same after creating a new "Web Application", my DataContext doesn't show up in the list, but if I go into my Code Behind I can access my DataContext through:
Dim db = new ForumDataContext()
What is the best practice on disposing objects in a .net method? I tend to avoid try/catch blocks as much as possible, so lets say I have a method in vb.net code behind that instantiates an object (The object may be a local variable or a class variable).Should I call objectName.dispose() when I am done with it?I am keeping in mind that I should aquire the object late and release it early during that method execution.
Private Sub Entity_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
im db As New LinqDataAccess.QuantumDataContext
Dim result = db.GetAddressType("Company")
[code]...
Is it a good practice if i am disposing my on the fly created controls.
Dim d07 As DropDownList = DirectCast(LoginView2.FindControl("ActiveViewTE"), DropDownList)
d07.SelectedValue = Session("CurrAdminEngineerID")
d07.Dispose()
This is part of a larger problem which has plagued me for a while now (see "EntityCollection already initialized" error with entity as model in Asp.Net MVC? for the entire picture).
But I found a web site with someone who had faced a similar problem and apparently solved it for his needs [URL]. I tried it, but had to make some modifications to fit my code, and the helper methods supplied by a tutorial by Steven Sanderson (see previous post).
I'm very close it seems, but not quite:
UpdateModel(consultant, "Consultant");
if (vm.Programs != null) //Unnecessary? Can it even be null if it's initialized from the model?
for (int i = 0; i < vm.Programs.Count; i++)
{
Program formProgram = vm.Programs[i];
Program modelProgram = consultant.Programs.SingleOrDefault(x => x.Id == formProgram.Id);
if (modelProgram == null)
_repository.AddProgram(formProgram);
else
modelProgram = formProgram;
UpdateModel(modelProgram); //Doesn't work. The modelProgram object does get updated with the correct property values, but it isn't saved to the repository...
}
_repository.Save();
Although this follows the example on the site above, and the modelProgram does get updated with the changed properties, these values are not saved to the database on _repository.Save() on the Consultant object, even though the modelProgram object is a reference to a Program object on the Consultant... What am I doing wrong?
I am using the Entity Framework by the way, if it isn't clear.
(BTW, if anyone has any input on the previous question and the whole picture, that would be welcome too, it is still unresolved).
UPDATE: There was apparently a mistake in here: UpdateModel didn't actually do any updating, I had just referenced a different object (the one in the viewmodel) for the modelProgram, so of course it had the right property values. I still want ideas for how to achieve this though...
I have a CustomRequestContext object that has to be disposed after each request. I create it in Page_Load and dispose of it in Page_Unload. The only issue is that in certain circumstances I need to call Server.Transfer to redirect to another aspx page instead. In this case, the object should not be unloaded until the new page is ready to be unloaded. What is the nicest way of achieving this?
View 2 RepliesI am writing here because I want to find out if there is a way of disposing of a custom defined membership asp.net provider within an application?If I make my custom provider disposable can I access it from the code-behind or is there an option which says the provider to be disposed?
View 5 RepliesI have an UpdatePanel that contains several "items" that are in individual divs that are registered as dragdrop objects. I pass the item ID into the object. Everything appears to be working fine until I delete an item/div. The items appear in the correct divs but the ID's are mismatched as if the delete never happened. I know the dispose method is being called for each object. But I don't know how the deleted item ID is still being passed in a drag/drop object that should be re-initialized on every pageLoad. It's difficult to explain but here is some of the relevant code:
Example of generated initializations on postback:
[Code]....
I want to be able to update a model and all its collections of child objects in the same view. I have been referred to these examples: http://haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx and http://blog.stevensanderson.com/2010/01/28/editing-a-variable-length-list-aspnet-mvc-2-style/ .
For example, I have an object Consultant, that has a collection of "WorkExperiences". All this is in an Entity Framework model. In the view, the simple properties of the Consultant object is no problem, but the collection I cannot get a textbox to show up for. I tried following the examples in the links above, but it doesn't work. The problem is, in those examples the model is just a list (not an object with a child list property). And also, the model again is an EF model. And for some reason that doesn't seem to work as in those examples.
[Code]....
This stuff with the EditorTemplate works fine in Phil Haack's sample project, which I downloaded to try, but here, with the EF model or whatever the problem is, I don't get any textbox at all. The table in the view is just there as a test, because in the table I do get the rows for WorkExperiences, whether I add an empty WorkExperience object or fill out its properties doesn't matter, the rows show up for each object. But again, no textbox...
I have tried googling and searching for this issue on SO - but have had little success - primarily because I am not sure whether I am searching right.I am working on an ASP.Net Web Application Project (not website) using Visual Studio 2008, C# and Cassini for testing.
http://localhost:8671/(S(saifdk55xyhalrqbstrtrdiw))/SubjectClassTeacher/Default.aspx
it is having the grid with bulk of data. So i decided to move to Cache to strore the dataset. So that it avoids in gettin the data from DB for each time the page is loading. Suppose my idea isnot good please suggest me the best way to acheive this.My question is if i suppose store the data into the cache, how can i dispose or clear the cache from the memmory for each time i close my current page or application. I dont want the cache in memmory for long time, i want only upto the time the application is running.
View 6 RepliesI have a list of objects that I want to bind to a gridview. Creating that list and binding it works fine for most of the public properties in that list.
There are some objects contained in each of those objects... for instance there is an Address object.
object.Address.Line1;
object.Address.Line2;
When I bind this to my gridview, I have no issues with stuff like object.DateRegistered, but how can I access things like object.Address.WhatEverProperty? I always get this error:
"A field or property with the name 'xxx.xxxx' was not found on the selected data source."
I have a label in ASP.NET 2.0(C#). The label should display a dutch language text that is "Sähköpostiosoite", I tried setting the Label.Text both from markup and code-behind but what I see in the browser response is "Sähköpostiosoite".
Originally assigned string "Sähköpostiosoite" get replaced with "Sähköpostiosoite".
I have developed a web site by using ASP.Net 2.0 and i have used Ajax tools and flash obects in it.And it has only buttons saying go to that page.aspx..Ihavent used any variable, i havent used any service.Do i have to use garbage collector for performance?Because i sometimes have to restart my servicess from application pool.If i must use garbage collector? how to use them for my Ajax button objects and flash swf objects?
View 1 RepliesI am working on an ASP.NET project where we are updating all of our websites to support Unicode values. In one place, we are allowing users to enter their email address as Unicode. I use the following code snippet to display the "mailto" address hyperlink:
Response.Write("<a href='mailto:" + Server.UrlEncode(email.EmailAddress) + "'>" + email.EmailAddress + "</a>");
When I click on this link, it opens Outlook, but the email address displays as garbage text. Any ideas on how to resolve this issue?From what I have heard, currently, email addresses only support ANSII characters, but Unicode characters are coming; That is why we are taking this step.
I want to know that how i use the collection class for storing some data and save it letter in the data base.
View 4 RepliesI am not sure how the user defined class objects are garbage collected. Do I need to implement IDisposable interface on every class and call the dispose() method on it to free the memory?
View 7 RepliesI am currently undertaking load testing of a asp.net 4.0 web application hosted on a 64bit 2008 server (iis 7.5).
The purpose of the load testing it to determine the maximum memory usage by the web application if every page is cached simultaneously.
To evaluate this I set the output cache duration of the pages to 900 seconds then I request each publicly accessible url via xenu link sluth. This effectively request 20,000 or so pages.
To monitor memory usage I am using both Windows performance monitor and Redgate memory profiler 7.0.
I have run the test twice, test 1 with the physical memory limit set to the default 0, and test 2 with the physical memory limit set to 921600 (900mb).
Here is what I have observed,
In both tests the application pool is never recycled.
In test 1, the worker process memory usage grows to 1,300mb. (Above the memory limit of test 2)
In test 2, memory usage grows to 720mb.
In test 2, memory usage grows to 720mb.
In test 1, the unused memory allocated to .Net grows to 700mb
In test 2 it grows to 150mb.
does setting the physical memory limit in iis 7.5 cause the garbage collector to operate more aggressively?
if we enter text without space in text box and then display it in gridview then it doesn't break in multiline and disturb all GUI. i try to set column width but it doesn't working.
View 6 RepliesI have an ASP.NET app with lots of textboxes all over the page that need updating at various points through program execution.
These textboxes actually belong to a certain class, so for easy updating I thought I could create a Dictionary(Of string, object) and add the control.ID and the control to it and then for updating do something like this:
(in case of updating textbox.text):
[code]....
However the text property of the textbox does not actually get updated. I'm mainly trying to avoid having to manually do textbox.text = somestring for each one of my textboxes every time I have to update them.
DataContext db = new DataContext(conString);
var dvd = db.GetTable<DvdList>();
var category = db.GetTable<CategoryList>();
var query= from b in dvd
join category on dvd.CategoryId equals category.CategoryId
where b.Title.Contains(txtSearch.Text)
select b;
GridView1.DataSource =query;
here has error "join category on dvd"