CODEWITHSUNDEEP
c#reflectionpropertiesfieldreadonly
Conrad Clark
Conrad Clark

Reputation: 4526

Is there a way to set C# readonly auto-implemented Propeties through reflection?

The title says all: Is there a way to set C# readonly auto-implemented Propeties through reflection?

typeof(Change)
    .GetProperty("ChangeType", BindingFlags.Instance | BindingFlags.Public)
    .SetValue(myChange, change.ChangeType.Transform(),null);

This line gives me an error : System.ArgumentException - {"Property set method not found."}. The thing is I can't use GetField because there are no fields.

Before you ask, I'm doing this because I need to "complement" an already finished library and I have no access to its code.

Upvotes: 1

Views: 706

Answers (2)

Ilia G
Ilia G

Reputation: 10211

the obvious conclusion would be that Change.ChangeType does not have public instance setter.

Upvotes: 1

jason
jason

Reputation: 241641

This should work, so there is something that you are not telling us. Are you sure that it's an auto-implemented property? An explanation consistent with what you are seeing is that the property is not auto-implemented and does not have a setter.

That is,

public class Foo { public int Bar { get; set; } }

typeof(Foo).GetProperty("Bar").SetValue(foo, 42);

will succeed but

public class Foo { public int Bar { get { return 42; } } }

typeof(Foo).GetProperty("Bar").SetValue(foo, 42);

will not and it will produce the exception with the message that you are seeing.

Upvotes: 4

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