3 tier architecture

Hi Vikas,

Will you please provide me the code.

I can look into this

Hi,
You need to know what s 3 layered architecture first,before you knowe about 3 tier one. The 3 layered architecture comprises of

a. UI Layer
b. Business Layer
c. DAL or Data Access Layer


So you need to create thosew threee layers in order to implement the 3 layered acrchitecture.

The control flows like this

function in UI ---> function in Business Layer---> function in DAL

So we define a function in UI layer like this

function void ShowEmployeeData()
{
   // call the function in Business Layer

  BusinessClass objBusinesClasss = new BusinessClass();
  DataSet ds= objBusinesClasss.GetEmployeeData();
 
 //show the data in the datagridview
  DataGridView1.DataSource = ds;
  DataGridView1.DataBind();
}

// Business Layer function


public DataSet GetEmployeeData()
{
  // call the DAL function to get the dataset
DataLayer objDataLayer = new DataLayer();
objDataLayer.
GetEmployeData();
return ds; /return the data set
}


// The function in the DataLayer

public DataSet GetEmployeeDetilas()
{
//Get the employee data by using the command object,adapter and connection object and storing it in DataSet
DataSet ds= new DataSet();
// store data in ds by calling a store proc or inline sql
return ds;
}



So in this way we generallly implement 3 layered architecture.

Now a 3 tier architecture is an architecture where all those 3 layers are present in different locations or machines.

Following links are going to be very usefull if you want to go in depth

http://www.codeproject.com/Articles/11128/3-tier-architecture-in-C
http://www.aspdotnet-suresh.com/2010/05/introduction-to-3-tier-architecture-in_17.html
http://social.msdn.microsoft.com/Forums/en-US/winformsapplications/thread/2c15af26-7758-4268-9568-5932225cca32/

A video

http://www.youtube.com/watch?v=4n3xzK1Cfh0

If you find this post as useful then please mark is as an answer

http://www.c-sharpcorner.com/uploadfile/rishiraveendran/understanding-three-tier-architecture/
http://www.c-sharpcorner.com/UploadFile/gopinath/Developing3-TierApplicationsinCSand.NET12032005013007AM/Developing3-TierApplicationsinCSand.NET.aspx
http://www.c-sharpcorner.com/uploadfile/hgvyas123/3-tier-architecture/
http://www.c-sharpcorner.com/uploadfile/gowth/two-tier-and-three-tier-architecture-with-example/