Activator Createinstance Object Reference Not Set Instance

Performance Tuning in ASP. Net Web Applications. If the application needing session mode state is out of process then consider carefully whether there is a need of the state server or SQL Server session mode. SQL Server session mode provides lower performance than session state server mode. Dont store Session Sate to store objects of any type including objects you create since they are stored by serializing and then de serializing them and that results in a big performance penalty. Use the client side session state management technique to transfer data from one page to other page like query string and clientsidestorage if possible. Be sure you use Release Build mode and not Debug Build when you deploy your site to production. If you think this doesnt matter, think again. By running in debug mode, you are creating PDBs and cranking up the timeout. Deploy Release mode and you will see the speed improvements. Disable View State of a Page if possible. View state is a technique in ASP. NET for storing some state data in a hidden input field inside the generated page. When the page is posted back to the server, the server can parse, validate and apply this view state data back to the pages tree of controls. Ibm Lotus Notes Client 7.0 For Windows 2000 on this page. View state is a very powerful capability since it allows state to be persisted with the client and it requires no cookies or server memory to save this state. Activator Createinstance Object Reference Not Set Instance UnavailableMany ASP. NET server controls use view state to persist settings made during interactions with elements on the page for example, saving the current page that is being displayed when paging through data. There are a number of drawbacks to the use of view state, however it increases the total payload of the page, both when served and when requested. There is also an additional overhead incurred when serializing or deserializing view state data that is posted back to the server. View state increases the memory allocations on the server. Several server controls, the most well known of which is the Data. I moved all of the sitecore data developed in our local environment to the Amazon Web Services Server. I attached database. IIS. and rewrote connection strings. The Most Complete Guide to Visual Studio Toolbox Control Integration. Libor Tinka, Lead Developer, ComponentOwl. Contents. 1. Introduction 2. Prerequisites. Point of Interest. Is. net core ready for production Lot of people told me asp. In this chapter, I describe dependency injection DI, a technique that helps create flexible applications and simplifies unit testing. Dependency injection can be a. In this article, We can create deep copy of an object with the help of Serialization and Reflection. IPBan for Windows is a great FREE alternative to RDPGuard and Syspeace. Easily block attacks to remote desktop, SQL Server, FTP, MysQL and more Want to know where performance bottlenecks are in your application Read about profiling in this threepart series by Kevin Burton. Grid, tend to make excessive use of view state, even in cases where it is not needed. Pages that do not have any server postback events can have the view state turned off. The default behaviour of the View State property is enabled, but if you dont need it, you can turn it off at the control or page level. Within a control, simply set the Enable. View. State property to false, or set it globally within the page using this setting. Page Enable. View. Statefalse  Avoid Response. Redirect. To do client side redirection in ASP. NET, users can call Response. Redirect and pass the URL. When Response. Redirect is called, the server sends a command back to the browser telling it to request the page redirected to it. An extra roundtrip happens that affects the performance. We can send information from the source page using a query string. There is a limitation on the length of a query string, it cannot be used to pass large amounts of data over the wire. To do server side redirection, users can use Server. Transfer. Since the execution is transferred on the server, Server. Transfer does not require the client to request another page. In Server. Transfer, by using Http. Context we can access the source pages items collection in the target page. The drawback of using this method is that the browser does not know that a different page was returned to it. It displays the first pages URL in the browsers address bar. Free Download Games For Pc Cooking Dash Download. This can confuse the user and cause problems if the user tries to bookmark the page. Transfer is not recommended since the operations typically flow through several pages. Use String. Builder to concatenate strings. All the manipulations you do to the string are stored in memory as separate references and it must be avoided as much as possible. In other words, when a string is modified, the runtime will create a new string and return it, leaving the original to be garbage collected. Most of the time this is a fast and simple way to do it, but when a string is being modified repeatedly it begins to be a burden on performance, all of those allocations eventually get expensive. Use String. Builder whenever a string concatenation is needed so that it only stores the value in the original string and no additional reference is created. The finally method gets executed independent of the outcome of the block. Always use a finally block to kill resources like closing database connections, closing files and other resources such that they are executed independent of whether the code in the try worked or went to the catch. User Input is evil and it must be thoroughly validated before processing to avoid overhead and possible injections to your applications. Client side validation can help reduce round trips required to process a users request. In ASP. NET you can also use client side controls to validate user input. However, do a check at the server side too to avoid the infamous Java. Script disabled scenarios. Round trips significantly affect performance. They are subject to network latency and to downstream server latency. Many data driven Web sites heavily access the database for every user request. Whereas connection pooling helps, the increased network traffic and processing load on the database server can adversely affect performance. Keep round trips to an absolute minimum. Implement Ajax UI whenever possible. The idea is to avoid full page refresh and only update the portion of the page that needs to be changed. Be sure you dont execute code needlessly. Use the Page. ISPost. Back property to ensure that you only perform page initialization logic when a page is first time loaded and not in response to client postbacks. Explicitly using a return allows the JIT to perform slightly more optimizations. Without a return statement, each functionmethod is given several local variables on the stack to transparently support returning values without the keyword. Keeping these around makes it harder for the JIT to optimize and can impact the performance of your code. Look through your functionsmethods and insert a return as needed. It doesnt change the semantics of the code at all and it can help you get more speed from your application. A foreach statement is far more readable and in the future it will become as fast as a for loop for special cases like strings. Unless string manipulation is a real performance hog for you, the slightly messier code may not be worth it. Use a LINQ query expression when needed. When you use by. Ref, you pass pointers instead of the actual object. Many times this makes sense side effecting functions, for example, but you dont always need it. Passing pointers results in more indirection and that is slower than accessing a value that is on the stack. When you dont need to go through the heap, it is best to avoid it, thereby avoiding indirection. Choose correct collections object Choose the right collection object that does better over another. For example, an Array. List is better than an array because an Array. List has everything that is good about an array plus automatic sizing, Add, Insert, Remove, Sort, Binary Search. All these great helper methods are added when implementing the IList interface and the downside of an Array. List is the need to cast objects upon retrieval. Carefully choosing a collection over another gives better performance. Here is the list of collection performance issues that helps us deciding which one gives better performance. Always check Page. Is. Valid when using Validation Controls. CSLA Forum Archive Index. CSLA. NET home page. Current CSLA. NET forum.