如何在 C# 中获取 class 值

Question

我已经创建了一个 class UserInfo 并且我已经设置了用户登录响应的值，现在我不知道如何在我的应用程序的另一部分（另一种形式）访问这些值.

Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MYCUSTOMAPP
{
    class UserInfo
    {
        public string userId;
        public string userType;
        public string userName;
        public string userUserName;
        public string userPhone;
        public string userIdCard;
    }
}

Login（将值设为 class 个）

//....
SqlDataReader result = cmd.ExecuteReader();
if (result.HasRows)
{
  while (result.Read())
  {
    UserInfo loggedUser = new UserInfo();
    loggedUser.userId = result.GetValue(result.GetOrdinal("Id")).ToString();
    loggedUser.userName = result.GetValue(result.GetOrdinal("Name")).ToString();
    loggedUser.userType = result.GetValue(result.GetOrdinal("UserType")).ToString();
    loggedUser.userUserName = result.GetValue(result.GetOrdinal("UserName")).ToString();
    loggedUser.userPhone = result.GetValue(result.GetOrdinal("Phone")).ToString();
    loggedUser.userIdCard = result.GetValue(result.GetOrdinal("IdCard")).ToString();
  }
}
// the rest...

问题

现在假设我处于 MainWindow 形式，我怎样才能获得 userId 的值？

更新

Logic

用户登录
将用户数据存储在 class（或您可能建议的任何其他内容）
在我的应用程序中全局获取这些用户数据，这样我就不需要在每次需要用户信息时都调用数据库（它会已经显示）

更新 2

我的登录功能

using (SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["MYCUSTOMAPPDatabaseString"].ConnectionString))
{
    if (cn.State == ConnectionState.Closed)
        cn.Open();
    using (DataTable dt = new DataTable())
    {
        using (SqlCommand cmd = new SqlCommand("dbo.LoginUser", cn))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@UserName", usernameBox.Text);
            cmd.Parameters.AddWithValue("@Password", passwordBox.Text);

            SqlDataReader result = cmd.ExecuteReader();
            if (result.HasRows)
            {
                while (result.Read())
                {
                    // Name of logged user from database (this is database response)
                    Console.WriteLine(result.GetValue(result.GetOrdinal("Name")));

                    // Add logged user info to `UserInfo` class
                    UserInfo loggedUser = new UserInfo();
                    loggedUser.userId = result.GetValue(result.GetOrdinal("Id")).ToString();
                    loggedUser.userName = result.GetValue(result.GetOrdinal("Name")).ToString();
                    loggedUser.userType = result.GetValue(result.GetOrdinal("UserType")).ToString();
                    loggedUser.userUserName = result.GetValue(result.GetOrdinal("UserName")).ToString();
                    loggedUser.userPhone = result.GetValue(result.GetOrdinal("Phone")).ToString();
                    loggedUser.userIdCard = result.GetValue(result.GetOrdinal("IdCard")).ToString();


                    MainWindow mainWindow = new MainWindow();
                    this.Hide();
                    mainWindow.ShowDialog();
                    Show();
                }
            }
            else
            {
                cn.Close();
                MessageBox.Show("Your credentials are not match!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}

Answer 1

我想你可以在调用另一个窗体的构造函数时将它作为参数传递，如果你直接调用那个窗体。就像在这种情况下：Communicate between two windows forms in C#

但是，如果您以后需要加载它，您可以将其存储为用户设置：https://www.youtube.com/watch?v=P432z8q9iVE。或者更结构化的方法是将数据存储在数据库中，例如 MySQL、MSSQL 或您可以在用户单击号召性用语按钮时放置的其他数据库。

Answer 2

已解决

我已将我的 class 更改为以下

class UserInfo
    {
        private string userId1;
        private static string userType1;
        private static string userName1;
        private static string userUserName1;
        private static string userPhone1;
        private static string userIdCard1;

        public string GetuserId()
        {
            return userId1;
        }
        public void SetuserId(string value)
        {
            userId1 = value;
        }

        public string GetuserType()
        {
            return userType1;
        }
        public void SetuserType(string value)
        {
            userType1 = value;
        }

        public string GetuserName()
        {
            return userName1;
        }
        public void SetuserName(string value)
        {
            userName1 = value;
        }

        public string GetuserUserName()
        {
            return userUserName1;
        }
        public void SetuserUserName(string value)
        {
            userUserName1 = value;
        }

        public string GetuserPhone()
        {
            return userPhone1;
        }
        public void SetuserPhone(string value)
        {
            userPhone1 = value;
        }

        public string GetuserIdCard()
        {
            return userIdCard1;
        }
        public void SetuserIdCard(string value)
        {
            userIdCard1 = value;
        }
    }

并将我的登录响应代码更改为：

while (result.Read())
{
  UserInfo loggedUser = new UserInfo();
  loggedUser.SetuserId(result.GetValue(result.GetOrdinal("Id")).ToString());     
 loggedUser.SetuserName(result.GetValue(result.GetOrdinal("Name")).ToString());
loggedUser.SetuserType(result.GetValue(result.GetOrdinal("UserType")).ToString());
     loggedUser.SetuserUserName(result.GetValue(result.GetOrdinal("UserName")).ToString());
loggedUser.SetuserPhone(result.GetValue(result.GetOrdinal("Phone")).ToString());
loggedUser.SetuserIdCard(result.GetValue(result.GetOrdinal("IdCard")).ToString());
}

现在我可以通过以下任何形式获取我的值：

UserInfo loggedUser = new UserInfo();
loggedUser.GetuserName(); // will return logged user name

如何在 C# 中获取 class 值

How to get class values in C#

c#

winforms

更新

更新 2