Recently, cases are often used.
List<T> it's really easy to use.
Because it has the following:
List<T>. Sort () → Sort T
List<T>. Find () → Find a T
List<T>
. FindAll() → Find multiple T
List<T>. Exist () → judge whether T exists. Let's write an example to introduce these things ..
List<Person> lstPerson = new
List<Person> ();
LstPerson. Add (new Person (1, "puma", 10 ));
LstPerson. Add (new Person (2, "F6 Team", 20 ));
LstPerson. Add (new Person (3, "ASP. NET", 30 ));
LstPerson. Add (new Person (4, "Dotblogs", 40); // the original data is displayed on the GridView.
This. GridView1.DataSource = lstPerson;
This. GridView1.DataBind ();//
List<T>. Find ()
// Find the Person whose Name is 'puma'
Response. Write ("find the Person with Name = 'puma' → ");
Response. Write (lstPerson. Find (delegate (Person p) {return p. Name = "puma" ;}). ToString ();//
List<T>
. FindAll()
// Find the number of Age> 10
Response. Write ("find the number of Age> 10 → ");
Response. Write (lstPerson
. FindAll(Delegate (Person p) {return p. Age> 10 ;}). Count. ToString ();//
List<T>. Exists ()
// Check whether Name = 'f6 'exists
Response. Write ("check whether Name = 'f6 'exists → ");
Response. Write (lstPerson. Exists (delegate (Person p) {return p. Name = "F6" ;}). ToString ();//
List<T>. Sort ()
// Sort by Name power-up
Response. Write ("<p> sort by Name to power up <br/> ");
LstPerson. Sort (delegate (Person p1, Person p2) {return Comparer <string>. Default. Compare (p1.Name, p2.Name );});
Foreach (Person p in lstPerson)
Response. Write (p. ToString () + "<br/> ");//
List<T>. Sort ()
// Sort by Name by power reduction
Response. Write ("<p> sort by Name in descending order <br/> ");
LstPerson. Sort (delegate (Person p1, Person p2) {return Comparer <string>. Default. Compare (p2.Name, p1.Name );});
Foreach (Person p in lstPerson)
Response. Write (p. ToString () + "<br/>"); ublic class Person
Private int _ ID;
Private string _ Name;
Private int _ Age; public Person (int ID, string Name, int Age)
{
_ ID = ID;
_ Name = Name;
_ Age = Age;
} Public int ID
{
Set {_ ID = value ;}
Get {return _ ID ;}
} Public string Name
{
Set {_ Name = value ;}
Get {return _ Name ;}
} Public int Age
{
Set {_ Age = value ;}
Get {return _ Age ;}
} Public override string ToString ()
{
Return string. Format ("ID: {0}, Name: {1}, Age: {2}", _ ID, _ Name, _ Age );
}
Execution result:
