three tier architecture of asp_net
DESCRIPTION
This slide show would talk about the 3-tier architecture and how is it helpful and about .NET Platform. I came up with some Networking Stuffs at http://www.youtube.com/bgccnadom. Try them if you like... THANK YOU FOR YOUR SUPPORT AND LIKES.TRANSCRIPT
Our Discussion
• What is a 3-Tier concept.• What are the various layers.• Application layer.• Business Logic Layer• Data Layer
Know How of Tools
• Tools used:– Visual Web Developer 2005 (Free)– Visual Studio 2005 (Paid)
• Databases used:– MS SQL Server 2005– MS ACCESS 2003/2007 (with MS-Office package)
Three layers• Presentation tier: The top most level of the application is
the user interface(Web Browser). The main function of the interface is to translate tasks and results to something the user understands. This is also called the Application layer.
• Logic Tier: This layer coordinates the application, processes commands, makes logical decisions and evaluations, and performs calculations, It also moves and processes data between the two surrounding layers.
• Data tier: Here information is stored and retrieved from a database management system. The information is then passed back to the logic tier for processing and then eventually back to the user.
Source of DB
• DB used with this is the Default NorthWind Database which can be downloaded from here
• http://www.microsoft.com/downloads/details.aspx?FamilyID=06616212-0356-46a0-8da2-eebc53a68034&DisplayLang=en
• The data access layer has four Methods:• GetCategories()• GetProducts()• GetProductsByCategoryID(categoryID)• GetProductByProductID(productID)
Table Adapters• TableAdapters provide communication between your
application and a database. More specifically, a TableAdapter connects to a database, executes queries or stored procedures, and either returns a new data table populated with the returned data or fills an existing DataTable with the returned data. TableAdapters are also used to send updated data from your application back to the database.
Generic Structure :• TableAdapter.Fill • TableAdapter.Update • TableAdapter.GetData • TableAdapter.Insert • TableAdapter.ClearBeforeFill
Samples• The DataTables returned by the TableAdapter can be bound to
ASP.NET data Web controls, such as the – GridView, – DetailsView, – DropDownList,– CheckBoxList, and several others.
Sample Code:>> AllProducts.aspx.csusing NorthwindTableAdapters; public partial class AllProducts : System.Web.UI.Page {protected void Page_Load(object sender, EventArgs e) { ProductsTableAdapter productsAdapter = new ProductsTableAdapter();
GridView1.DataSource = productsAdapter.GetProducts(); GridView1.DataBind();
} }
Insert,Update and Delete
SAMPLE CODE:>>
ProductsTableAdapter productsAdapter = new ProductsTableAdapter(); // Delete the product with condition productsAdapter.Delete(…); // Update a record with conditionproductsAdapter.Update(…); // Add a new product productsAdapter.Insert(…);
References
• http://msdn.microsoft.com/• http://aspnet.4guysfromrolla.com• http://www.asp.net
For my latest updates:• http://www.cognobytes.com/biswadipgoswami/Default.
aspx