在 class 而不是 class 的集合上使用 foreach

Question

所以我有一个带有字符串、浮点数、日期时间和数据表的 class

public class Data : IEnumerator
{

    string m_PowerSwitch = "Not Tested",
        m_SerialNumber = "Not Tested",
        m_Reset = "Not Tested",
        m_WashPump = "Not Tested",

        m_PortB = "Not Tested",
        m_PortC = "Not Tested",
        m_PortD = "Not Tested",
        m_CurlyTube = "Not Tested",
        m_BypassTube = "Not Tested";

    float m_EC53115VMeasured = 0.0F,
        m_EC53165VMeasured = 0.0F,
        m_EC531624VMeasured = 0.0F,

        m_SolventLineBVolumeMeasured = 0.0F,
        m_SolventLineCVolumeMeasured = 0.0F,
        m_SolventLineDVolumeMeasured = 0.0F,
        m_CurlyTubeVolumeMeasured = 0.0F,
        m_BypassTubeVolumeMeasured = 0.0F;
}

我想使用 foreach 语句，例如

        foreach (ASM001.ASM asm in P00001.Global.ListofAvailableASMs)
        {  
            if (asm.ASMData.EndTime == null)
                asm.ASMData.EndTime = endTime;

            foreach (object data in asm.ASMData)
            {
                if (data == "Not Tested")
                {
                    asm.ASMData.Result = "FAILED";
                }
                continue;
            }

但我无法找到搜索 class 的各个字段的任何帮助，只是在 class 类型的列表上。

我遇到了错误 foreach 语句不能对 'ASM001.Data' 类型的变量进行操作，因为 'ASM001.Data' 不包含 'GetEnumerator'

的 public 定义

我想知道这是否可行，或者我是否需要硬编码按名称检查每个字符串字段并返回 true 或 false。

所以你现在有比我复制的更多的字符串我必须检查，这就是为什么我想知道是否有更快的方法来做到这一点。

Answer 1

使用反射（代码解释，这不会构建）

Data data = ...
Type type = data.GetType();
FieldInfo[] fields = type.GetFields(...);
foreach(FieldInfo field in fields) {

    Console.WriteLine("{0} = {1}", field.Name, field.GetValue( data ) );
}

Answer 2

来自MSDN（以下示例应该构建和运行）：

The following example retrieves the fields of MyClass and displays the field values.

using System;
using System.Reflection;

public class MyClass
{
    public string myFieldA;
    public string myFieldB; 
    public MyClass()
    {
        myFieldA = "A public field";
        myFieldB = "Another public field";
    }
}

public class FieldInfo_GetValue
{
    public static void Main()
    {
        MyClass myInstance = new MyClass();
        // Get the type of MyClass.
        Type myType = typeof(MyClass);
        try
        {
            // Get the FieldInfo of MyClass.
            FieldInfo[] myFields = myType.GetFields(BindingFlags.Public 
                | BindingFlags.Instance);
            // Display the values of the fields.
            Console.WriteLine("\nDisplaying the values of the fields of {0}.\n",
                myType);
            for(int i = 0; i < myFields.Length; i++)
            {
                Console.WriteLine("The value of {0} is: {1}",
                    myFields[i].Name, myFields[i].GetValue(myInstance));
            }
        }  
        catch(Exception e)
        {
            Console.WriteLine("Exception : {0}", e.Message);
        }
    }
}

Answer 3

可能的 LINQ 版本：

Data data = ...
FieldInfo[] fields = (from f in data.GetType().GetFields(BindingFlags.Instance|BindingFlags.NonPublic) where f.Name.StartsWith("m_") select f).ToArray();

在 class 而不是 class 的集合上使用 foreach

Use foreach on a class not a collection of a class

c#

ienumerator

foreach