C# 如何把两个UserInfo类 对象加到 List <> 中

发布网友 发布时间：2022-04-24 08:10

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共3个回答

热心网友 时间：2023-10-09 02:34

public class UserInfo
{
private string _username;
private string _userpwd;

public string UserName
{
get { return _username; }
set { _username = value; }
}

public string UserPwd
{
get { return _userpwd; }
set { _userpwd = value; }
}
}

public class BUserInfo
{
public List<UserInfo> GetAll()
{
List<UserInfo> list = new List<UserInfo>();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
//add1
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
//add2
list.Add(userinfo);
return list;
}
}

这样应该可以吧，因为List<T>是一个集合，两条信息都会存在这个集合中吧

热心网友 时间：2023-10-09 02:35

List<UserInfo> list = new List<UserInfo>();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
list.add(userinfo );
userinfo = new UserInfo();
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
list.add(userinfo );
return list;

热心网友 时间：2023-10-09 02:35

public class BUserInfo
{
public List<UserInfo> GetAll()
{
List<UserInfo> list = new List<UserInfo>();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
//add1
list.add(userinfo);
UserInfo userinfo = new UserInfo();
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
//add2
list.add(userinfo);
return list;
}
}追问这种方法不行的，UserInfo 是引用类型，再Show（）的时候两个值是一样的

追答using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace demo
{
class Program
{
static void Main(string[] args)
{
BUserInfo info = new BUserInfo();
foreach (UserInfo user in info.GetAll())
Console.WriteLine(user.ToString());

Console.ReadLine();
}
}

[Serializable]
public class UserInfo
{
private string _username;
private string _userpwd;

public string UserName
{
get { return _username; }
set { _username = value; }
}

public string UserPwd
{
get { return _userpwd; }
set { _userpwd = value; }
}

public override string ToString()
{
return new StringBuilder(string.Format("UserName is {0},UserPwd is {1}", this.UserName, this.UserPwd)).ToString();
}
}

public class BUserInfo
{
public List GetAll()
{
List list = new List();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
//add1
list.Add(userinfo);

userinfo = new UserInfo();
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
//add2
list.Add(userinfo);

return list;
}
}

}

都测试过了，你自己看一样不一样。虽然是 引用类型，但是第二个你new过了，重新赋值了