查找List中的某個值，可以使用循環遍歷對比，查找出結果。C#中提供了Find方法，可以直接使用，只要查找條件傳入就可。如下：
class Program
{
public static void Main(string[] args)
{
List<User> userCollection = new List<User>();
userCollection.Add(new User(1, "testOne"));
userCollection.Add(new User(2, "testTwo"));
userCollection.Add(new User(3, "testThree"));
User resultUser = userCollection.Find(
delegate(User user)
{
//return user.UserID == 0;
return user.UserID == 1 && user.UserName.Equals("testOne");
});
Console.WriteLine(resultUser != null ?
resultUser.UserID + System.Environment.NewLine + resultUser.UserName : "沒有查找到");
Console.ReadLine();
}
}
public class User
{
private int userID = 0;
private string userName = string.Empty;
public int UserID
{
get
{
return this.userID;
}
}
public string UserName
{
get
{
return this.userName;
}
}
public User(int userID, string userName)
{
this.userID = userID;
this.userName = userName;
}
}
結果：
1
testOne
