[英]Use foreach on a class not a collection of a class
所以我有一個帶有字符串,浮點數,DateTimes和數據表的此類
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;
}
我想使用一個foreach語句,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;
}
但是我無法在類的單個列表上搜索類的各個字段找到任何幫助。
我收到錯誤的foreach語句,無法對類型為“ ASM001.Data”的變量進行操作,因為“ ASM001.Data”不包含“ GetEnumerator”的公共定義
我想知道這是否可行,或者我是否將不得不按名稱對每個字符串字段進行硬編碼並返回true或false。
如此一來,您現在要檢查的字符串比我要檢查的要多得多,這就是為什么我想知道是否有一種更快的方法來執行此操作。
使用反射(代碼釋義,這將不會生成)
Data data = ...
Type type = data.GetType();
FieldInfo[] fields = type.GetFields(...);
foreach(FieldInfo field in fields) {
Console.WriteLine("{0} = {1}", field.Name, field.GetValue( data ) );
}
從MSDN (以下示例應構建並運行):
下面的示例檢索MyClass的字段並顯示字段值。
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);
}
}
}
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();
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