使用反射循环遍历类中的结构

Question

public struct volt_struct
{
    public string volt1;
    public string volt2;
    public string volt2;
    public string volt3;
}
private class Injection_class
{
    public volt_struct stru1;
    public volt_struct stru2;
    public volt_struct stru3;
    public volt_struct stru4;
    public volt_struct stru5;
    public volt_struct stru6;
}

public void main()
{
    Injection_class Time = new Injection_class();

    //Here is code that fills Time with Time values as string type

    string s="";
    FieldInfo[] fi_inner = Time.stru1.GetType().GetFields();
    FieldInfo[] fi_outer = Time.GetType().GetFields();

    // This part is wrong, but shows what I want to achive.
    foreach(FieldInfo field_outer in fi_outer)
    {
        foreach(FieldInfo field_inner in fi_inner)
        {
            s = string.concat(s+field_outer.field_inner.GetValue(Time) + ";");
        }
    }

}

我想使用反射将存储在 Time 中的字符串连接到字符串 s 中。稍后我必须修改类和结构，我不想调整连接代码。

通过对类中的每个结构使用 foreach 循环，我得到了我想要的结果。

 foreach (FieldInfo field in fi_inner)
{
    s = string.Concat(s + field.GetValue(Time.stru1) + ";");
    //field.SetValue(Time, "not measured"); //reset value
}
foreach (FieldInfo field in fi_inner)
{
    s = string.Concat(s + field.GetValue(Time.stru2) + ";");
    //field.SetValue(Time, "not measured"); //reset value
}
//and so one for each other struct

我想像我给出的第一个示例一样实现它。 这可能吗？

Answer 1

您可以更轻松地做到这一点而无需反思。像这样更改结构和类：

public struct volt
{
    private string[] _volts = new string[4];
    public string[] volts {get {return _volts;} }

    public string volt1 {
       get {return _volts[0];}
       set {_volts[0] = value;}
    }
    public string volt2 {
       get {return _volts[1];}
       set {_volts[1] = value;}
    }
    public string volt3 {
       get {return _volts[2];}
       set {_volts[2] = value;}
    }
    public string volt4 {
       get {return _volts[3];}
       set {_volts[3] = value;}
    }
}

private class Injection
{
    private _volt[] = new volt[5];

    public volt[] {get {return _volt;} }

    public volt stru1 {
        get {return _volt[0];}
        set {_volt[0] = value;}
    }
    public volt stru2 {
        get {return _volt[1];}
        set {_volt[1] = value;}
    }
    public volt stru3 {
        get {return _volt[2];}
        set {_volt[2] = value;}
    }
    public volt stru4 {
        get {return _volt[3];}
        set {_volt[3] = value;}
    }
    public volt stru5 {
        get {return _volt[4];}
        set {_volt[4] = value;}
    }
    public volt stru6 {
        get {return _volt[5];}
        set {_volt[5] = value;}
    }
}

现在您可以使用漂亮、方便的数组了：

public void main()
{
    Injection Time = new Injection();

    //Here is code that fills Time with Time values as string type

    string result = "";
    foreach(volt v in Time.volt)
    {
        foreach(string s in v.volts)
        {
           result += s + ";"
        }
    }
    Console.WriteLine(result);
}

Answer 2

在“field_inner”上运行的 FieldInfo 属性需要对“volt_struct”类型对象的引用，因此 Time 在这里不起作用。您需要先在“field_outer”上执行 GetValue，如下所示：

foreach(FieldInfo field_outer in fi_outer)
{
    var outer_object = field_outer.GetValue(Time);
    if (outer_object == null) throw someexception;

    foreach (FieldInfo field_inner in fi_inner)
    {
        s = string.concat(s+field_inner.GetValue(outer_object) + ";");
    }
}

如果您想改变父子类型，您可以将它们作为 System.Type 参数传入，或者您可以编写一个具有两个类型参数的通用函数。您也可以将“fi_inner =”移动到外循环并执行 fi_inner = outer_object.GetType().GetFields()。这将连接任何类型的任何子对象上的字符串。