Questions tagged [fieldinfo]
54 questions
32
votes
8 answers
Is there a way to create a delegate to get and set values for a FieldInfo?
For properties there are GetGetMethod and GetSetMethod so that I can do:
Getter = (Func)Delegate.CreateDelegate(typeof(Func),
propertyInfo.GetGetMethod());
and
Setter = (Action
nawfal
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26
votes
2 answers
How to find if a member variable is readonly?
class Bla
{
public readonly int sum;
}
FieldInfo f = type.GetField("sum");
f.?? // what?
How do I find if sum is readonly or not? For properties I can do PropertyInfo.CanWrite to find if the member has write access.
nawfal
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8
votes
1 answer
Field getter/setter with expression tree in base class
Following the examples on this post and its follow-up question, I am trying to create field getters / setters using compiled expressions.
The getter works just great, but I am stuck the setter, as I need the setter to assign any type of fields.
Here…
neggenbe
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7
votes
1 answer
What are GetField, SetField, GetProperty and SetProperty in BindingFlags enumeration?
I have no idea what these are for. The documentation is not very clear:
GetField Specifies that the value of the specified field should be returned.
SetField Specifies that the value of the specified field should be set.
GetProperty Specifies that…
nawfal
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6
votes
1 answer
C# Reflection: What is the difference between FieldInfo.SetValue() and FieldInfo.SetValueDirect()?
The FieldInfo documentation I was able to find did not compare and contrast these two methods. I am interested in understanding when one should be used over the other (preferably with a small code snippet).
Jim
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6
votes
2 answers
C# reflection GetValue from a field in generic base class
the problem is that we cannot GetValue of a field (non generic) that only resides in base class that has generic type.
please see the code snippet below. calling
f.GetValue(a)
will throw the exception with message: Late bound operations cannot be…
user1519274
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4
votes
0 answers
Get line numbers of fields without using a c# parser
I would like to get the line #s of a type's fields.
To get the line #'s of the statements in a method it is simple enough:
Type type = typeof(MyClass);
MethodInfo methodInfo = type.GetMethod("SomeMethod");
int token =…
user420667
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4
votes
1 answer
FieldInfo.GetValue return null for a private member while debugger indicates field is non null?
In C# / .NET 4.0 I am trying to retrieve a field value through reflection with:
var bar = foo.GetType()
.GetField("_myField", BindingFlags.Instance | BindingFlags.NonPublic)
.GetValue(foo)
I am a bit puzzled by the situation. The value returned…
Joannes Vermorel
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4
votes
1 answer
How to reference a field by reflection
Sorry for the title, it's not explicit.
Further to my precedent question, I want to subscribe a method to an event object retrieved dynamically (via reflection). The object in question is a field of a Control :
public void SubscribeEvents(Control…
Florian
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4
votes
1 answer
Why is MemberInfo.GetCustomAttributes(Type) defined to return an array of attributes?
public enum Animal
{
[Description("King of jungle")]
Lion= 1,
[Description("Tallest there")]
Giraffe = 2
}
Suppose I have the FieldInfo, I can go about it two ways:
//static one on 'Attribute' class
Attribute attribute =…
nawfal
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4
votes
1 answer
Why is a member of base class different from the same member in derived class?
This is a followup to this question: Lambda expression not returning expected MemberInfo
class Human
{
public string name { get; set; }
}
class Man : Human
{
}
var m1 = typeof(Human).GetProperty("name");
var m2 =…
nawfal
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4
votes
3 answers
How do I get the FieldInfo of an array field?
I'm trying to get the field info of an array value from within a struct. So far I have the following, but I dont see how to get the infomration I want.
[StructLayout(LayoutKind.Sequential)]
public struct Test
{
public byte…
SwDevMan81
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3
votes
1 answer
How can I filter FieldInfos that are the underlying implementation of a class event?
I want to get all the fields of a class without getting the underlying implementations of the class event.
type.GetFields(BindingFlags...) returns the nuderlying delegate for event fields. Does anyone knows how to filter them out ?
Izik Shmulewitz
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3
votes
1 answer
How to get the MethodInfo of a function of a class, without string comparison
Similar to a previous question of mine, when I was asking about getting the FieldInfo of a field, How to get the FieldInfo of a field from the value, from the answers there, I compiled this helper class,
using System;
using System.Reflection;
using…
seaders
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3
votes
2 answers
Getting the attributes of a field using reflection in C#
I wrote a method that extracts fields from an object like this:
private static string GetHTMLStatic(ref Object objectX, ref List ExludeFields)
{
Type objectType = objectX.GetType();
FieldInfo[] fieldInfo = objectType.GetFields();
…
Mr. Smith
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