The State Bag class has the following properties: The following example demonstrates the concept of storing view state. When session state is turned on, a new session state object is created for each new request.
Let us keep a counter, which is incremented each time the page is posted back by clicking a button on the page. The markup file code is as follows: It would produce the following result: Control state cannot be modified, accessed directly, or disabled. This session state object becomes part of the context and it is available through the page.
Validation of user input makes sense to prevent missing or malformed data, eg. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
You cannot prevent that kind of problems by validating input.
However, there needs to be some technique to store the information between requests and to retrieve it when required.
This information i.e., the current value of all the controls and variables for the current user in the current session is called the State. NET manages four types of states: The view state is the state of the page and all its controls.
You can use something like: using System; using System.
a user writing "asdf" in the zip-code field and so on. e-mail adresses, the syntax is so complex though, that it doesnt provide much benefit to validate it using a regex. Would you like to answer one of these unanswered questions instead?
NET was developed in direct response to the problems that developers had with classic ASP. NET: Client-Side Validation: When validation is done on the client browser, then it is known as Client-Side Validation.For the ease of understanding, I have created BAL, DAL into the App_Code folder. pre 2) Can you post other similar article with Ajax? Because in practice we expect the delete to be performed with confirmation and also in details screen. Add new / Edit in 2 different tab panels - to have better usability. Regards, Sreedhar Thanks Vansree for your suggestions. Regarding pre class, I will let the webmaster know about it. As far as article on Ajax is concerned, I will try my best to post few articles on Ajax in coming days. Regards This is simpler example for 3-Tier Architecture.In real scenario, you should create separate projects for BAL, DAL (as Class Library) and UI (as Web project) and reference your BAL into UI. I wonder if you can come up with the same but using Ajax Tabs. Like having add button in Grid View will switch you to Tab Panel (Add new) and then perform the add ... But would like to see if you can come up with Tabs and your example above. I have one question about passing the data between layers.Presentation Layer (UI) Presentation layer cotains pages like or windows form where data is presented to the user or input is taken from the user. Hope this article helped you understanding 3-Tier architecture and desiging it. Updated on July 01 2008: Source Code attached Full Name: Sheo Narayan Member Level: Honorary Platinum Member Status: Administrator Member Since: 7/8/2008 PMCountry: India Regards, Sheo Narayan MVP, Author, Writer, Mentor & architecting applications since year 2001.Business Access Layer (BAL) or Business Logic Layer BAL contains business logic, validations or calculations related with the data, if needed. Data Access Layer (DAL) DAL contains methods that helps business layer to connect the data and perform required action, might be returning data or manipulating data (insert, update, delete etc). Connect me on | https://twitter.com/sheonarayan | Hi, Nice article; Well and simply explained.