Question

在我的程序中，我有一个Class Tracer：

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

    namespace Tracepak_Heat_Loss_Program
    {
        class Tracer
        {
            public string family;
            public string model;
            public string type;
            public int output;
            public int voltage;
            public int maxMaintain;
            public int maxIntermittent;
            public string tRating;
            public string approvals;
            public string code;

            public Tracer(string f, string m, string t, int o, int v, int mM, int mI,string tR, string a, string c) 
            {            
                family = f;
                model = m;
                type = t;
                output = o;
                voltage = v;
                maxMaintain = mM;
                maxIntermittent = mI;
                tRating = tR;
                approvals = a;
                code = c;
            }
        }    
    }

在我的主要表单中，我创建了几个跟踪器的实例：

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;


    namespace Tracepak_Heat_Loss_Program
    {
        public partial class mainForm : Form
        {
            public mainForm()
            {
                InitializeComponent();
            }

            private void mainForm_Load(object sender, EventArgs e)
            {
            }


            Tracer J3 = new Tracer("Raychem BTV", "3BTV1-CT", "Self-Reg", 3, 120, 150, 185, "T6", "FM/CSA/ATEX", "J3");
            Tracer J5 = new Tracer("Raychem BTV", "5BTV1-CT", "Self-Reg", 5, 120, 150, 185, "T6", "FM/CSA/ATEX", "J5");
            Tracer J8 = new Tracer("Raychem BTV", "8BTV1-CT", "Self-Reg", 8, 120, 150, 185, "T6", "FM/CSA/ATEX", "J8");
            Tracer J10 = new Tracer("Raychem BTV", "10BTV1-CT", "Self-Reg", 10, 120, 150, 185, "T6", "FM/CSA/ATEX", "J10");

我的主窗体中有一个方法，它从列表框中返回跟踪器名称

    public string GetTracer()
    {
        String s = tracerListBox.Text;
        int index = s.IndexOf(" ");
        return index >= 0 ? s.Substring(0, index): s;
    }
    // This could yield "J3" for example

我希望能够使用GetTracer（）的结果来检索该跟踪器的属性。

例如：

我可以打电话

    J3.family;

    // The result of which is "Raychem BTV"

我想要做的是使用

    GetTracer().family;

并让它返回与我的方法GetTracer返回的跟踪器关联的属性。

这可能吗？提前感谢您的协助。我对编程很陌生，虽然我试图通过使用类来使代码更加健壮，但事实证明它比我想象的要困难。

Answer 1

除非GetTracer().Name返回GetTracer个对象，否则您无法Tracer。

如果你想根据它的代码找到一个跟踪器，你应该考虑一些字典来存储它的跟踪器名称：

Dictionary<string, Tracer> dict = new Dictionary<string, Tracer>;

并在那里插入对每个创建的跟踪器的引用：

Tracer J3 = new Tracer("Raychem BTV", "3BTV1-CT", "Self-Reg", 3, 120, 150, 185, "T6", "FM/CSA/ATEX", "J3");
dict.Add("J3", J3);

之后你可以轻松地做到这一点：

string name = GetTracer();
if(dict.ContainsKey(name))
{
    Tracer item = dict[name];
    string family = item.family;
}

Answer 2

无需局部变量J3，J5，J8等以及其他数据结构。只需在Tracer类中添加ToString方法

即可

public override string ToString()
{
    return code;
}

并将您的Tracer对象添加到列表框中，如下所示

listBox.Items.Add( new Tracer("Raychem BTV", "3BTV1-CT", "Self-Reg", 3, 120, 150, 185, "T6", "FM/CSA/ATEX", "J3") );
listBox.Items.Add( new Tracer("Raychem BTV", "5BTV1-CT", "Self-Reg", 5, 120, 150, 185, "T6", "FM/CSA/ATEX", "J5") );
listBox.Items.Add( new Tracer("Raychem BTV", "8BTV1-CT", "Self-Reg", 8, 120, 150, 185, "T6", "FM/CSA/ATEX", "J8") );
listBox.Items.Add( new Tracer("Raychem BTV", "10BTV1-CT", "Self-Reg", 10, 120, 150, 185, "T6", "FM/CSA/ATEX", "J10") );

这样，您将在ListBox中看到code。

在ListBox的某些事件中，您可以将跟踪器对象作为

void listBox_SelectedIndexChanged(object sender, EventArgs e)
{
    Tracer tracer =  ((ListBox)sender).SelectedItem as Tracer;
    MessageBox.Show(tracer.family);
}

C＃如何将字符串转换为类的实例？

2 个答案: