首页 > 代码库 > C#中List的Find方法的使用
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 = http://www.mamicode.com/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 = http://www.mamicode.com/tmpvalue;
}
}
- 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 : "没有查找到");
- 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;
- }
- }