Sharepoint 2010 server object model

I am going to write a few methods showing some of the basic operations which can be performed using object model.

Microsoft provides lot of API's for working with object model.

Examples are- SPSite,SPWeb,SPList etc..
All these api's are availbale in Microsoft.Sharepoint.dll .so add it as a reference and insert in code
using Micosoft.Sharepoint namespace.

create a new project in visual studio.
(My suggestion is to create a Empty sharepoint project from sharepoint 2010 template).

Then add a visual web part there.

To get the current context -

using(SPSite site =new SPSite(SPContext.current.site.URL))

to get a current web inside the site-

using(SPWeb web =new SPWeb(site.OpenWeb())

Let's say I have a Student entity class.

[serializable]
Public class Student
{
  public string Name {get;set:}
  public string Email {get;set;}
}

Now I want to get all the list items stored in student list of sharepoint site.


public List<Student> GetAllStudents()
        {
            List<Student> lstStudent = new List<Student>();
            SPList list = web.Lists["Student"];                   
            SPListItemCollection collectionItem = list.Items;  //Get all items
            //SPListItemCollection collectionItem = list.getItems(query) //If CAML query is used
            foreach (SPItem item in collectionItem)
            {
                lstStudent .Add(GetStudent(item));
            }
            
        }


 private Student GetStudent(SPItem item)
        {
            return new Student
            {
                Name= (string)item.Name,
                Email = (string)item["Email"]
            };
        }

Lets say I want to add in student list.

We will write a method like

public void AddStudent(Student objstudent)  //Passing object of student class
{
  SPList list = web.Lists["Student"];             
  SPItem itemstudent;
  itemstudent=list.AddItem();
  itemstudent["Name"]=objstudent.Name;
  itemstudent["Email"]=objstudent.Email;
  itemstudent.update();
}



I will be writing few more examples..