Question

我是C＃的新手，我遇到了问题。实际上这是我在大学和编程的第一年，我有阵列的问题。我在Windows Form Application中创建了一个包含3个构造函数和1个方法的类。问题是我想使用按钮将来自三个文本框的数据（用户正在键入）存储到10的数组中。而且我不知道该怎么做。

public class Employee
{
    private int idnum;
    private string flname;
    private double annual;

    public Employee()
    {

        idnum = 0;
        flname = "";
        annual = 0.0;
    }
    public Employee(int id, string fname)
    {
        idnum = id;
        flname = fname;
        annual = 0.0;
    }
    public Employee(int id, string fname, double ann)
    {
        idnum = id;
        flname = fname;
        annual = ann;
    }

    public int idNumber
    {
        get { return idnum; }
        set { idnum = value; }
    }
    public string FLName
    {
        get { return flname; }
        set { flname = value; }
    }

    public double Annual
    {
        get { return annual; }
        set { annual = value; }
    }
    public string Message()
    {
        return (Convert.ToString(idnum) + "  " + flname + "  " + Convert.ToString(annual));
    }

}

Answer 1

首先，您应该在此表单上添加3个textboxe元素，并以下一个方式命名textBoxId，textBoxFLName，textBoxAnnual

此外，您还必须添加一个按钮。我们称之为btnSave 为此按钮编写一个事件OnClick。在这种方法中，我们必须读取用户在表单上填写的所有数据。

List<Employee> allEmployees = new List<Employee>();
private void buttonSave_Click(object sender, EventArgs e)
    {
        //read user input
        int empId = Int32.Parse(textBoxId.Text);
        string empFlName = textBoxFLName.Text;
        double empAnnual = double.Parse(textBoxAnnual.Text);

        // create new Employee object
        Employee emp = new Employee(empId, empFlName, empAnnual);

        // add new employee to container (for example array, list, etc). 
        // In this case I will prefer to use list, becouse it can grow dynamically
        allEmployees.Add(emp);

    }

您还可以用最短的方式重写代码：

public class Employee
{
    public int IdNum { get; set; }
    public string FlName { get; set; }
    public double Annual { get; set; }

    public Employee(int id, string flname, double annual = 0.0)
    {
        IdNum = id;
        FlName = flname;
        Annual = annual;
    }

    public override string ToString()
    {
       return (Convert.ToString(IdNum) + "  " + FlName + "  " + Convert.ToString(Annual));
    }
}

C＃数组保存数据

1 个答案: