问题
How can I read the properties of an object that contains an element of array type using reflection in c#. If I have a method called GetMyProperties and I determine that the object is a custom type then how can I read the properties of an array and the values within. IsCustomType is method to determine if the type is custom type or not.
public void GetMyProperties(object obj)
{
foreach (PropertyInfo pinfo in obj.GetType().GetProperties())
{
if (!Helper.IsCustomType(pinfo.PropertyType))
{
string s = pinfo.GetValue(obj, null).ToString();
propArray.Add(s);
}
else
{
object o = pinfo.GetValue(obj, null);
GetMyProperties(o);
}
}
}
The scenario is, I have an object of ArrayClass and ArrayClass has two properties:
-string Id
-DeptArray[] depts
DeptArray is another class with 2 properties:
-string code
-string value
So, this methods gets an object of ArrayClass. I want to read all the properties to top-to-bottom and store name/value pair in a dictionary/list item. I am able to do it for value, custom, enum type. I got stuck with array of objects. Not sure how to do it.
回答1:
Try this code:
public static void GetMyProperties(object obj)
{
foreach (PropertyInfo pinfo in obj.GetType().GetProperties())
{
var getMethod = pinfo.GetGetMethod();
if (getMethod.ReturnType.IsArray)
{
var arrayObject = getMethod.Invoke(obj, null);
foreach (object element in (Array) arrayObject)
{
foreach (PropertyInfo arrayObjPinfo in element.GetType().GetProperties())
{
Console.WriteLine(arrayObjPinfo.Name + ":" + arrayObjPinfo.GetGetMethod().Invoke(element, null).ToString());
}
}
}
}
}
I've tested this code and it resolves arrays through reflection correctly.
回答2:
You'll need to retrieve the property value object and then call GetType() on it. Then you can do something like this:
var type = pinfo.GetGetMethod().Invoke(obj, new object[0]).GetType();
if (type.IsArray)
{
Array a = (Array)obj;
foreach (object arrayVal in a)
{
// reflect on arrayVal now
var elementType = arrayVal.GetType();
}
}
FYI -- I pulled this code from a recursive object formatting method (I would use JSON serialization for it now).
来源:https://stackoverflow.com/questions/4879197/using-reflection-read-properties-of-an-object-containing-array-of-another-object