See in below I have writtine a
1. Singleton class Emp1 with Display Method and
2. Static Class with Static Method Display.
What is the advantage of singleton class over Static Class with Static members?
[Code]....
I have searched deference between Static and Singleton Patten on google but did not get it clearly.
View 12 RepliesI have some confusion with singleton class, below are my some points:
1.Can singleton class have static method?,if yes then how we call that methods?
2.what is main difference between Static class and Singleton Class?
I have created my singleton class as follows:
[Code]....
In Above class structure I have created two method one is Static and second is non static, When I am trying to access Static Method it gives me compile time error.
How can I use static method of singleton class?
I know what Singleton Pattern means and Abstract class means.What I wanted to know was how would this apply to real world.Could anyone give me any good example or simple explanation.Say I have a simple website, why would I use any of the above if any.Why would it simplify my architechture.
View 3 RepliesJust wanted to know if a singleton class could be inherited and derived.
View 2 RepliesI am new to Entity frameworks-EF. As, EF is built on top of ADO.NET...If so, will there be any performance issue when we use it?Same way MVC also targets Test Driven , rapid application development only ..What speciality does it add for end-users?As per my understanding ASP.Net 2.0 itself is powerful without MVC and/or EF...
View 7 Replieswant to make sure I am not assuming something foolish here, when implementing the singleton pattern in an ASP .Net web application the static variable scope is only for the current user session, right? If a second user is accessing the site it is a different memory scope...?
View 4 RepliesIn one of the interview, I was asked why should we have to go for Single Design pattern, instead of just creating static methods. Because creating static methods also serve the same purpose, i.;e avoiding flooding of objects.
View 1 RepliesI am working on singleton desing patterns and want some real world example of design patterns.Can you please give me an example how you have used singleton pattern in you project. I would appreciate if you can provide code.
View 3 RepliesI have a private static field in my Controller class in an MVC web application.
I have a static method in that controller that assigns some value to that static field, I want to apply lock on that static field until some other instance method in the controller uses the value stored in the static field and then releases it.
DETAILS:
I have a controller named BaseController having a static ClientId field as follows and two methods as follows:-
public static string ClientId = "";
static void OnClientConnected(string clientId, ref Dictionary<string, object> list)
{
list.Add("a", "b");
// I want the ClientId to be locked here, so that it can not be accessed by other requests coming to the server and wait for ClientId to be released:-
BaseController.clientId = clientId;
}
public ActionResult Handler()
{
if (something)
{
// use the static ClientId here
}
// Release the ClientId here, so it can now be used by other web requests coming to the server.
return View();
}
I have set the instanceContextMode to single to create a singleton class.I use the join to add a user to the list, and getuserlist() to retrieve the users. I added a service reference opened two browsers , made sure i simulated it such that i am adding two seperate users , and display the users returned by getuserlist. But its always displaying only one user , the current user. I also have a counter
private static int counter = 1
public int returnCounter()
{
return counter++;
}
This is returning incremented values when i open it in different browsers , but the list is always getting overritten. I am running this as a managed windows service, wsHttpBinding , and my client is a website accessing this service.
[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]
I have a question about C Sharp ASP.NET:Is there a difference (in code speed, resources) between:public static variable declared in public static class MyGlobals in a 'Code File' template;and the variable declared in a normal 'Class File' template;I use this variable in 2 different Class Files and also in _Default Page codebehind cs file.In fact in my case I need about 20 global variables of type List<string>.
View 9 RepliesI have designed an application and am wondering if this is the best architecture to use and whether there is any danger.
In namespace Membership I have a public class, MembershipManager, which inherits from webservice
public class MembershipManager() : System.Web.Services.Webservice
The single public web method of this class often needs to read and write to a database.
[WebMethod()] public string DoMembershipWork(...various parameters...)
The database work is done by implementing, in the same namespace,an internal class
internal class MembershipDataAccess
which has a series of internal static methods for data access e.g.
internal static bool UpdateMembership(MembershipManager m)
The MembershipManager class accesses the data access class by calling the appropriate method with itself as a parameter e.g.
MembershipDataAccess.UpdateMembership(this);
Is this a good idea. This application will be processing many transactions simultaneously. Is there a danger of not being thread safe. Note also that sometimes the MembershipDataAccess class will return datasets to the MembershipManager class.
If for example you have a function Public shared function GetStockByID(StockID as Guid) as Stock Is that function common to all current users of your application? Or is the shared function only specific to the current user and shared in the context of ONLY that current user? So more specifically my question is this, besides database concurrency issues such as table locking do I need to concern myself with threading issues in shared functions in an ASP.Net application?In my head; let's say my application namespace is MyTestApplicationNamespace. Everytime a new user connects to my site a new instance of the MyTestApplicationNamespace is created and therefore all shared functions are common to that instance and user but NOT common across multiple users. Is this correct?
View 2 RepliesI have an app that I am testing with NUNit. The project im testing has several helper classes that are created as public static readonly. When I run the NUnit tests, they all fail with the same error
Systems.Code.Test.TransactionTest.CreateDataContext_ConnectionString_ReturnsDataContextObject:
I have an ASP.NET HttpModule that is distributed as a DLL. I badly need a plugin architecture so I can isolate some heavyweight, rarely used features into external .dlls, and speed up/slim up the core functionality.I've experimented with (1) reflection and (2) static constructors.It seems GoDaddy and a few other web hosts prohibit use of Reflection, making #1 useless..NET 4.0 now calls static constructors lazily, eliminating #2.
How can I have a generic plugin registration system that doesn't require C# or VB code to register the plugins? Even a web.config plugin registration list would be fine, but I don't know how to do that without using reflection.
Update: I need this to work in .NET 2.0 as well as higher versions
I am developing a web application, which has Data Access Layer and this layer has only one class, in which all methods are static methods like static Insert, static Update, static Search. It has no properties. I am using these methods in my Bussiness Logic class for my users who are visiting my website.Now my question is : 1. Is it right to use static methods in this scenario ?2. What will happen if 10 users call Insert method at the same time ?
View 3 RepliesSo I started working on my first asp.net application that involves logging in and databases, and soon after i started messing around with a static class. I "discovered" that if you make a variable static, all sessions share that variable (I for some reason was originally assuming that each session had its own copy of that "static" class). Anyway, after discovering this I thought to myself "how could this possibly be useful to me" and thought that itmight be a good idea to make a single static database connection for all of the sessions, rather than storing that as a session variable for each session. Does anybody know what would be the pros and cons of this approach?
View 5 RepliesIf a static class is put in App_Code, does that imply only one instance will be created, shared by different http requests?Or each request still brings one request?
View 3 Repliesis there any impact of using static methods in Business Access layer in 3 tier applciation,
View 4 Repliesis it ok to use something like this in the web:
(my application is on asp.net mvc)
public static class DbUtil
{
public static int Insert(object o, string cs)
{
using (var conn = new SqlConnection(cs))
using (var cmd = conn.CreateCommand())
{
conn.Open();
return Convert.ToInt32(cmd.ExecuteScalar());
[Code]....
So i have some existing functionality from an older ASP.Net app that is a static class.
Say there's a static method in that class that returns a dataset that I would like to bind to something like a gridview or whatever I can build using MVC3.
I am using <%# MyFormatClass(Eval("fieldname")) %> to display data in a grid view on my page. MyFormatClass works fine, but now I want to move it to a central location that can be used by many pages. When I try to access the class <%# Utils.MyFormatClass(Eval("fieldname")) %> it no longer works. Is this something we are allowed to do?
View 1 RepliesSince I'm using Postgresql and can't use LINQ to SQL, I wrote my own wrapper classes.
This is a part of the Student class:
[code]....
It works now! I replaces all Run methods in the Student class with DB.Run
But I want to know if it will work fine with a lot of people online, not me only. I'm not sure how static things work with ASP.NET, maybe it'll eat a lot of memory?..
I would like to generate my links automatically via a static class in each of my aspx pages (or in a common BasePage).Currently I use this:
private const string TEMPLATE =
"~/One.aspx";
public static string Link ()
(
string link = String.Format(TEMPLATE);
return link;
)
But the name of my page, One.aspx is hardcoded. Is it possible to generate the path instead of this hardcoded constant TEMPLATE. You should know that I do not instantiate the class before creating the link.