Employee和ProductionWorker类,从类中获取信息
本文关键字:获取 信息 ProductionWorker Employee | 更新日期: 2023-09-27 18:26:04
我不完全确定标题是否适合。我被学校的一项作业卡住了,本该有一段视频来展示如何做到这一点,但就我而言,我不知道如何从pearson网站下载学生文件。以下是我正在处理的问题。
员工和生产工人类
创建一个Employee类,该类具有以下数据的属性:
- 员工姓名
- 员工编号
接下来,创建一个名为ProductionWorker的类,该类派生自Employee类。ProudctionWorker类应该具有用于保存以下数据的属性:
- 移位数(整数,如1、2或3)
- 小时工资率
工作日分为两班:白天和晚上。Shift属性将包含一个整数值,表示员工工作的班次。白班是1班,夜班是2班。
创建一个应用程序,该应用程序创建ProductionWorker类的对象,并允许用户为该对象的每个属性输入数据。检索对象的属性并显示其值。
这是我为它工作的代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace classes
{
public partial class frmMainClasses : Form
{
string EmpShift = "";
string EmployeeName = "";
int EmployeeNumber = 0;
float HourlyPayRate = 0;
public class Employee
{
public string EmployeeName { get; set; }
public int EmployeeNumber { get; set; }
}
public class ProductionWorker : Employee
{
public float HourlyPayRate { get; set; }
public Shift Shift { get; set; }
}
public enum Shift
{
Day = 1,
Night = 2
}
public frmMainClasses()
{
InitializeComponent();
}
private void btxExit_Click(object sender, EventArgs e)
{
this.Close();
}
private void btnGetInfo_Click(object sender, EventArgs e)
{
string EmpShift = "";
ProductionWorker productionWorker = new ProductionWorker();
productionWorker.EmployeeName = txtName.ToString();
EmployeeName = productionWorker.EmployeeName; //Added mostly because I couldn't get EmployeeName to show anything in the messagebox
productionWorker.EmployeeNumber = Convert.ToInt32(txtIdNumb.text);
productionWorker.HourlyPayRate = Convert.ToInt32(txtPay.text);
EmpShift = Convert.ToString(txtShift.text);
txtName.Text = "";
txtIdNumb.Text = "";
txtPay.Text = "";
txtShift.Text = "";
}
private void btnShow_Click(object sender, EventArgs e)
{
MessageBox.Show("Name " + EmployeeName + "IDNumber " + EmployeeNumber + "Hourly rate " + txtPay + "Shift " + txtShift);
}
}
}
代码本身没有显示任何错误,但当我尝试运行它时,我会得到:
字符串EmpShift的东西在那里,因为我不知道如何使用移位代码,或多或少地,我把它用作占位符,直到我把它指出来。我不知道如何解决这个问题,希望这是个小错误。
多亏了通讯器的帮助,我才解决了第一个问题,现在我的消息框在最后出现了问题。我输入的信息是,Glitter代表姓名,12代表身份证号码,1代表轮班,12代表工资。显示内容如下:
名称System.Windows.Forms.TextBox,文本:GlitterIDNumber 0小时费率System.Windows.Forms.TextBox,Text:Shift-SystemWindowsForm.TextBox,Text:
Convert.ToString
不会给您一个错误,因为其中一个调用了带有对象public static string ToString(object value)
的重载。但是,由于您对用户输入的值感兴趣,请使用-TextBox.Text
属性,而不是传递TextBox
。
更新1:有关此行为的一些内幕
System.Convert.ToString(object value)
在.net-中实现如下
public static string ToString(Object value, IFormatProvider provider) {
IConvertible ic = value as IConvertible;
if (ic != null)
return ic.ToString(provider);
IFormattable formattable = value as IFormattable;
if (formattable != null)
return formattable.ToString(null, provider);
return value == null? String.Empty: value.ToString();
}
因此它最终调用TextBox.ToString()
CCD_ 7如下
public static int ToInt32(object value) {
return value == null? 0: ((IConvertible)value).ToInt32(null);
}
因此是一个无效的强制转换异常,因为此-((IConvertible)value).ToInt32(null)
更新2:重构代码使其工作
public partial class frmMainClasses : Form
{
//Change 1
//I have removed all class level string since they tend to make your code complicated & difficult to manage
//I'll replace all of them this a single instance of ProductionWorker class, a single object is easy to manage than a bunch
ProductionWorker productionWorker = new ProductionWorker(); // Creating the production Worker at class level
public class Employee
{
public string EmployeeName { get; set; }
public int EmployeeNumber { get; set; }
}
public class ProductionWorker : Employee
{
public float HourlyPayRate { get; set; }
public Shift Shift { get; set; }
}
public enum Shift
{
Day = 1,
Night = 2
}
public frmMainClasses()
{
InitializeComponent();
}
private void btxExit_Click(object sender, EventArgs e)
{
this.Close();
}
private void btnGetInfo_Click(object sender, EventArgs e)
{
//Change 2 : set the values of the class level variable
productionWorker.EmployeeName = txtName.Text; //.ToString(); // Change 3 removing the .ToString();
productionWorker.EmployeeNumber = Convert.ToInt32(txtIdNumb.Text);
productionWorker.HourlyPayRate = Convert.ToInt32(txtPay.Text);
productionWorker.Shift = (Shift)Enum.Parse(typeof(Shift), txtShift.Text);
//change 4 : using .ResetText() instead of Text
txtName.ResetText();// .Text = "";
txtIdNumb.ResetText();//.Text = "";
txtPay.ResetText();//.Text = "";
txtShift.ResetText();//.Text = "";
}
private void btnShow_Click(object sender, EventArgs e)
{
// change 5 : accessing class level productionWorker instead of bunch of strings
MessageBox.Show("Name " + productionWorker.EmployeeName + " IDNumber " + productionWorker.EmployeeNumber + " Hourly rate " + productionWorker.HourlyPayRate + " Shift " + productionWorker.Shift);
}
}
我添加了评论来详细说明我所做的所有更改,如果你有任何问题,请给我写一条评论。
此外,目前您的代码不会验证文本框中的用户输入。