I am looping through the properties of an object and need to find out is the property is an class or multiple classes (enumerable, collection or list) and inherit a class of x and i am a little stuck, any help would be appriciated.
I am looping through the properties of an object and need to find out is the property is an class or multiple classes (enumerable, collection or list) and inherit a class of x and i am a little stuck, any help would be appriciated.
public class Base
{
public int Id { get; set; }
}
public class Test:Base
{
public Test2 Test2 { get; set; }
public List<Test2> Tests { get; set; }
}
public class Test2
{
public string Data { get; set; }
}
2.Test:
public void Testmethod()
{
var obj = new Test();
foreach (var property in obj.GetType().GetProperties())
{
//for complex types
if (property.PropertyType.IsClass&&!typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
{
Console.WriteLine("{0} is a class", property);
}
if(typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
{
Console.WriteLine("{0} is List class", property);
}
//if it is a subclass
if(typeof(Test).IsSubclassOf(typeof(Base)))
{
Console.WriteLine("{0} is inherits from Base", property);
}
}
}
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is a property an object, list and inherit from x class
Mar 15, 2020 06:52 PM|EnenDaveyBoy|LINK
Hi
I am looping through the properties of an object and need to find out is the property is an class or multiple classes (enumerable, collection or list) and inherit a class of x and i am a little stuck, any help would be appriciated.
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Re: is a property an object, list and inherit from x class
Mar 15, 2020 07:41 PM|mgebhard|LINK
I think you are looking for an extension method.
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/how-to-implement-and-call-a-custom-extension-method
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Re: is a property an object, list and inherit from x class
Mar 15, 2020 09:49 PM|bruce (sqlwork.com)|LINK
you use the is operator:
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is
also as core supports c# 8, you can use the new pattern matching:
https://docs.microsoft.com/en-us/dotnet/csharp/pattern-matching
Participant
1841 Points
2798 Posts
Re: is a property an object, list and inherit from x class
Mar 15, 2020 11:06 PM|EnenDaveyBoy|LINK
thanks for the replie, sorry rushed the op. have tried to us is but I am looping through the properties
foreach(var prop in GetType().GetProperties()) { }do i have to check if its all enumerable and collection and List, or is there one i can check for them all?
can i use
if (prop == typeof(MyInheitedClassName))
{
}
Participant
1970 Points
657 Posts
Re: is a property an object, list and inherit from x class
Mar 16, 2020 05:45 AM|Rena Ni|LINK
Hi EnenDaveyBoy,
Here is a working demo like below:
1.Model:
public class Base { public int Id { get; set; } } public class Test:Base { public Test2 Test2 { get; set; } public List<Test2> Tests { get; set; } } public class Test2 { public string Data { get; set; } }2.Test:
public void Testmethod() { var obj = new Test(); foreach (var property in obj.GetType().GetProperties()) { //for complex types if (property.PropertyType.IsClass&&!typeof(IEnumerable).IsAssignableFrom(property.PropertyType)) { Console.WriteLine("{0} is a class", property); } if(typeof(IEnumerable).IsAssignableFrom(property.PropertyType)) { Console.WriteLine("{0} is List class", property); } //if it is a subclass if(typeof(Test).IsSubclassOf(typeof(Base))) { Console.WriteLine("{0} is inherits from Base", property); } } }Reference:
https://stackoverflow.com/a/8699063/11398810
https://stackoverflow.com/a/37844503/11398810
Best Regards,
Rena
Please remember to click "Mark as Answer" the responses that resolved your issue.
If you have any compliments or complaints to MSDN Support, feel free to contact MSDNFSF@microsoft.com.
Participant
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Re: is a property an object, list and inherit from x class
Mar 16, 2020 02:13 PM|EnenDaveyBoy|LINK
thanks for the info, really helped, only bit i changed for my own future reference.