C# 获取PropertyInfo的递归例程
我正在尝试创建一个递归例程,该例程将检索指定对象(在.NET 3.5中)下所有成员的PropertyInfo。直接成员的一切工作正常,但它也需要解析嵌套类(及其嵌套类等) 我不明白如何处理解析嵌套类的部分。您将如何编写这部分代码C# 获取PropertyInfo的递归例程,c#,reflection,.net-3.5,recursion,C#,Reflection,.net 3.5,Recursion,我正在尝试创建一个递归例程,该例程将检索指定对象(在.NET 3.5中)下所有成员的PropertyInfo。直接成员的一切工作正常,但它也需要解析嵌套类(及其嵌套类等) 我不明白如何处理解析嵌套类的部分。您将如何编写这部分代码 public class ObjectWalkerEntity { public object Value { get; set; } public PropertyInfo PropertyInfo { get; set; } } public s
public class ObjectWalkerEntity
{
public object Value { get; set; }
public PropertyInfo PropertyInfo { get; set; }
}
public static class ObjectWalker
{
// This will be the returned object
static List<ObjectWalkerEntity> objectList = new List<ObjectWalkerEntity>();
public static List<ObjectWalkerEntity> Walk(object o)
{
objectList.Clear();
processObject(o);
return objectList;
}
private static void processObject(object o)
{
if (o == null)
{
return;
}
Type t = o.GetType();
foreach (PropertyInfo pi in t.GetProperties())
{
if (isGeneric(pi.PropertyType))
{
// Add generic object
ObjectWalkerEntity obj = new ObjectWalkerEntity();
obj.PropertyInfo = pi;
obj.Value = pi.GetValue(o, null);
objectList.Add(obj);
}
else
{
////// TODO: Find a way to parse the members of the subclass...
// Parse each member of the non-generic object
foreach (Object item in pi.PropertyType)
{
processObject(item);
}
}
}
return;
}
private static bool isGeneric(Type type)
{
return
Extensions.IsSubclassOfRawGeneric(type, typeof(bool)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(string)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(int)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(UInt16)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(UInt32)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(UInt64)) ||
Extensions.IsSubclassOfRawGeneric(type, typeof(DateTime));
}
我还添加了一个新的检查,以查看某个内容是否是列表
private static bool isList(Type type)
{
return
IsSubclassOfRawGeneric(type, typeof(List<>));
}
private static bool isList(类型)
{
返回
IsSubclassOfRawGeneric(类型、类型(列表));
}
谢谢你的帮助 我想这对你有用。这里的想法是从对
ProcessObject()
的每次调用中返回一个可枚举对象,然后将这些调用上卷到调用者列表中
公共类ObjectWalkerEntity
{
公共对象值{get;set;}
公共属性信息属性信息{get;set;}
}
公共静态类ObjectWalker
{
公共静态列表漫游(对象o)
{
返回ProcessObject(o.ToList();
}
私有静态IEnumerable ProcessObject(对象o)
{
如果(o==null)
{
//这里什么都没有,只返回一个空的可枚举对象
返回新的ObjectWalkerEntity[0];
}
//创建列表以保存在此对象中找到的值
var objectList=新列表();
类型t=o.GetType();
foreach(t.GetProperties()中的PropertyInfo pi)
{
if(IsGeneric(pi.PropertyType))
{
//添加泛型对象
var obj=new ObjectWalkerEntity();
obj.PropertyInfo=pi;
obj.Value=pi.GetValue(o,null);
objectList.Add(obj);
}
其他的
{
//非泛型,获取属性值并进行递归调用
对象值=pi.GetValue(o,null);
//从递归调用返回的所有值
//上卷到此调用中创建的列表中。
AddRange(ProcessObject(value));
}
}
返回objectList.AsReadOnly();
}
私有静态bool为泛型(类型)
{
返回
IsSubclassOfRawGeneric(类型,类型(bool))||
IsSubclassOfRawGeneric(类型、类型(字符串))||
IsSubclassOfRawGeneric(类型,类型(int))||
IsSubclassOfRawGeneric(类型,类型(UInt16))||
IsSubclassOfRawGeneric(类型,类型(UInt32))||
IsSubclassOfRawGeneric(类型,类型(UInt64))||
IsSubclassOfRawGeneric(类型,类型(日期时间));
}
私有静态bool IsSubclassOfRawGeneric(类型generic,类型toCheck)
{
while(toCheck!=typeof(对象))
{
var cur=toCheck.IsGenericType?toCheck.GetGenericTypeDefinition():toCheck;
如果(通用==cur)
{
返回true;
}
toCheck=toCheck.BaseType;
}
返回false;
}
}
看一看。它是开源的,使用反射来迭代每种反射类型,包括处理泛型。可以使用yield-return,还应该为back-reference属性保存一个已处理对象的列表。这几乎可以工作,但它遇到了列表问题。
private static bool isList(Type type)
{
return
IsSubclassOfRawGeneric(type, typeof(List<>));
}
public class ObjectWalkerEntity
{
public object Value { get; set; }
public PropertyInfo PropertyInfo { get; set; }
}
public static class ObjectWalker
{
public static List<ObjectWalkerEntity> Walk(object o)
{
return ProcessObject(o).ToList();
}
private static IEnumerable<ObjectWalkerEntity> ProcessObject(object o)
{
if (o == null)
{
// nothing here, just return an empty enumerable object
return new ObjectWalkerEntity[0];
}
// create the list to hold values found in this object
var objectList = new List<ObjectWalkerEntity>();
Type t = o.GetType();
foreach (PropertyInfo pi in t.GetProperties())
{
if (IsGeneric(pi.PropertyType))
{
// Add generic object
var obj = new ObjectWalkerEntity();
obj.PropertyInfo = pi;
obj.Value = pi.GetValue(o, null);
objectList.Add(obj);
}
else
{
// not generic, get the property value and make the recursive call
object value = pi.GetValue(o, null);
// all values returned from the recursive call get
// rolled up into the list created in this call.
objectList.AddRange(ProcessObject(value));
}
}
return objectList.AsReadOnly();
}
private static bool IsGeneric(Type type)
{
return
IsSubclassOfRawGeneric(type, typeof(bool)) ||
IsSubclassOfRawGeneric(type, typeof(string)) ||
IsSubclassOfRawGeneric(type, typeof(int)) ||
IsSubclassOfRawGeneric(type, typeof(UInt16)) ||
IsSubclassOfRawGeneric(type, typeof(UInt32)) ||
IsSubclassOfRawGeneric(type, typeof(UInt64)) ||
IsSubclassOfRawGeneric(type, typeof(DateTime));
}
private static bool IsSubclassOfRawGeneric(Type generic, Type toCheck)
{
while (toCheck != typeof(object))
{
var cur = toCheck.IsGenericType ? toCheck.GetGenericTypeDefinition() : toCheck;
if (generic == cur)
{
return true;
}
toCheck = toCheck.BaseType;
}
return false;
}
}