C＃如何将字符串转换为类的实例？

Question

在我的节目，我有一个类示踪：

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; 
      } 
     }  
    } 

在我的主要形式，我已经创建了几个示踪剂的实例：

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"); 

我有我的主要形式的方法，它返回示踪名从列表框

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 

我想能够使用GetTracer（）的结果来检索该跟踪器的属性。

例如：

我可以打电话给

J3.family; 

    // The result of which is "Raychem BTV" 

我想要做的是使用

GetTracer().family; 

，并使其返回与示踪剂有关的财产，我的方法GetTracer回报。

这可能吗？预先感谢您的帮助。我对编程非常陌生，尽管我试图通过使用类来使代码更加健壮，但事实证明，这比我想象的要困难得多。

Answer 1

无需本地变量iables J3,J5,J8等等的数据结构。 只是ToString方法列表框添加到您的示踪类

public override string ToString() 
{ 
    return code; 
} 

，并添加您的示踪物如下

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")); 

这样一来，你会看到code在你的列表框。

在一些ListBox的事件，你可以得到示踪对象

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

Answer 2

你不能这样做GetTracer().Name除非GetTracer返回一个Tracer对象。

如果你想找到这取决于它示踪剂是你应该思考一些字典存储在它那示踪名称代码：

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

，并插入提法，每个创建示踪剂有：

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

后，你可以很容易地做到这一点：

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