C#中的反射-想要一个类的字段的数据类型的列表 [英] Reflection in C# -- want a list of the data types of a class' fields
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问题描述
我的C#类MyClass(如下)具有成员a,b,c,d,e和f.
My C# class MyClass (below) has members a, b, c, d, e, and f.
我想使用反射来获取那些成员的数据类型的列表; 例如(从Python表示法借用):[char [],ushort,char,byte,uint,ulong].
I'd like to use reflection to obtain a list of the data types of those members; for example (borrowing from Python notation): [ char[], ushort, char, byte, uint, ulong ].
class MyClass
{
public char [ ] a ;
public ushort b ;
public char c ;
public byte d ;
public uint e ;
public ulong f ;
}
class MainClass
{
public static void Main ( string [] args )
{
// get an array (or some kind of list) of MyClass' fields' data types ...
// for example: { char[], ushort, char, byte, uint, ulong }
// I've tried the following, but can't get a column of just the data types, alone ...
MemberInfo[] theMemberInfoArray = typeof(MyClass).GetMembers() ;
foreach (MemberInfo mi in theMemberInfoArray)
if (mi.MemberType == MemberTypes.Field)
Console.WriteLine ( "<" + mi.MemberType + ">\t"
+ "<" + mi.GetType() + ">\t"
+ "<" + mi.Name + ">\t" + mi ) ;
}
}
程序输出如下:
<Field> <System.Reflection.RtFieldInfo> <a> Char[] a
<Field> <System.Reflection.RtFieldInfo> <b> UInt16 b
<Field> <System.Reflection.RtFieldInfo> <c> Char c
<Field> <System.Reflection.RtFieldInfo> <d> Byte d
<Field> <System.Reflection.RtFieldInfo> <e> UInt32 e
<Field> <System.Reflection.RtFieldInfo> <f> UInt64 f
我希望程序输出显示为:
I would like program output to appear as:
<Field> <System.Reflection.RtFieldInfo> <a> <Char[]> Char[] a
<Field> <System.Reflection.RtFieldInfo> <b> <UInt16> UInt16 b
<Field> <System.Reflection.RtFieldInfo> <c> <Char> Char c
<Field> <System.Reflection.RtFieldInfo> <d> <Byte> Byte d
<Field> <System.Reflection.RtFieldInfo> <e> <UInt32> UInt32 e
<Field> <System.Reflection.RtFieldInfo> <f> <UInt64> UInt64 f
推荐答案
这是我的工作方式,您希望FieldType实际返回Type实例.
this is how I did it, you want the FieldType which actually returns a Type instance.
var members = typeof(TestMe).GetFields().Select(m => new
{
Name = m.Name,
MemType = m.MemberType,
RtField = m.GetType(),
Type = m.FieldType
});
foreach (var item in members)
Console.WriteLine("<{0}> <{1}> <{2}> <{3}> {3} {2}", item.MemType, item.RtField, item.Name, item.Type, item.Type, item.Name);
public class TestMe
{
public string A;
public int B;
public byte C;
public decimal D;
}
这是输出:
<Field> <System.Reflection.RtFieldInfo> <A> <System.String> System.String A
<Field> <System.Reflection.RtFieldInfo> <B> <System.Int32> System.Int32 B
<Field> <System.Reflection.RtFieldInfo> <C> <System.Byte> System.Byte C
<Field> <System.Reflection.RtFieldInfo> <D> <System.Decimal> System.Decimal D
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