C#中List的Find方法的使用

查找List中的某个值，可以使用循环遍历对比，查找出结果。C#中提供了Find方法，可以直接使用，只要查找条件传入就可。如下：

public class RecordInfo
{
private string recordID = string.Empty;
private string itemID = string.Empty;
private string recordAndItemID = string.Empty;
private string value = string.Empty;

public string RecordID
{
get
{
return this.recordID;
}
}

public string ItemID
{
get
{
return this.itemID;
}
}

public string RecordAndItemID
{
get
{
return this.recordAndItemID;
}
}

public string Value
{
get
{
return this.value;
}
}

public RecordInfo(string tmprecordID, string tmpitemID, string tmprecordAndItemID, string tmpvalue)
{
this.recordID = tmprecordID;
this.itemID = tmpitemID;
this.recordAndItemID = tmprecordAndItemID;
this.value = tmpvalue;
}
}

1. class Program
2. {
3. public static void Main(string[] args)
4. {
5. List<User> userCollection = new List<User>();
6. userCollection.Add(new User(1, "testOne"));
7. userCollection.Add(new User(2, "testTwo"));
8. userCollection.Add(new User(3, "testThree"));
9. User resultUser = userCollection.Find(
10. delegate(User user)
11. {
12. //return user.UserID == 0;
13. return user.UserID == 1 && user.UserName.Equals("testOne");
14. });
15. Console.WriteLine(resultUser != null ?
16. resultUser.UserID + System.Environment.NewLine + resultUser.UserName : "没有查找到");
17. Console.ReadLine();
18. }
19. }
20. public class User
21. {
22. private int userID = 0;
23. private string userName = string.Empty;
24. public int UserID
25. {
26. get
27. {
28. return this.userID;
29. }
30. }
31. public string UserName
32. {
33. get
34. {
35. return this.userName;
36. }
37. }
38. public User(int userID, string userName)
39. {
40. this.userID = userID;
41. this.userName = userName;
42. }
43. }