机房重构之学生端显示个人信息
作者:互联网
先来张效果图:
这样的效果是用lblbox显示出从表中读取到的信息,并且随窗体加载出来,效果比较简洁美观。当实现这个功能之后,还觉得少点什么。这时候想到了腾讯QQ,QQ号就好比卡号,是不可变的固定值,当然变也不现实,维护成本太高。而昵称(用户名)是可变的,因此我也给它加了一个修改用户名的功能
U层代码:
private void MineForm_Load(object sender, EventArgs e)
{
StudentInfo student = new StudentInfo();
Facade.MainFormFacade mineFacade = new Facade.MainFormFacade();
//student.UserName = LoginUser.UserID;
student.CardNo= LoginUser.UserID;
DataTable table = mineFacade.SelectMain(student);
lblCardNo.Text = table.Rows[0][1].ToString();
textBox2.Text = table.Rows[0][0].ToString();
lblCash.Text = table.Rows[0][6].ToString();
lblType.Text=table.Rows[0][8].ToString();
lblDate.Text = table.Rows[0][9].ToString();
}
private void button1_Click(object sender, EventArgs e)
{
Facade.MainFormFacade Facade = new Facade.MainFormFacade();
Entity.StudentInfo user = new Entity.StudentInfo();
user.UserName = textBox2.Text;
user.CardNo = lblCardNo.Text;
Boolean result = false;
result = Convert.ToBoolean(Facade.UpdateUserName(user));
if (result != false)
{
MessageBox.Show("用户名修改成功");
}
}
D层代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//引用空间
using System.Data;
using System.Data.SqlClient;
using IDAL;
using Entity;
namespace DAL
{
public class MainFormDAL: IDAL.MainFormIDAL
{
//实例化一个SQHelp层,用于连接数据库进行查询。
SQLHelper sqlHelper = new SQLHelper();
/// <summary>
/// 查询管理者信息
/// </summary>
/// <param name="">管理者信息实体</param>
/// <returns>整个管理者信息实体</returns>
public DataTable SelectMain(Entity.StudentInfo student)
{
//定义查询参数
SqlParameter[] sqlapms = { new SqlParameter("@CardNo", student.CardNo) };
//定义SQL语句
string sql = @"select * from [Student] where CardNo=@CardNo";
//接受查询结果
DataTable table = sqlHelper.ExecuteQuery(sql, sqlapms, CommandType.Text);
return table;//返回查询结果
}
public int UpdateUserName(StudentInfo username)
{
SqlParameter[] sqlparams = {new SqlParameter("@CardNo", username.CardNo), new SqlParameter("@UserName", username.UserName) };
string sql = "UPDATE [Student] SET UserName = @UserName WHERE CardNo =@CardNo";
int result = sqlHelper.ExecuteNonQuery(sql, sqlparams, CommandType.Text);
return result;//返回受影响行数
}
}
}
标签:重构,CardNo,个人信息,System,new,机房,Text,using,table 来源: https://blog.csdn.net/qq_44685392/article/details/119281184