In this article. Initializes a new instance of the FieldInfo class. Gets a collection that contains this member's custom attributes. Inherited from MemberInfo. Gets the class that declares this member. Gets a value indicating whether the field can only be set in the body of the constructor. Gets a value indicating whether the value is written at compile time and cannot be changed.
Gets a value that indicates whether the current field is transparent at the current trust level. Gets a value that identifies a metadata element. Gets the name of the current member. Equals Object. Returns a value that indicates whether this instance is equal to a specified object. GetCustomAttributes Boolean.
GetCustomAttributes Type, Boolean. Returns the hash code for this instance. Gets an array of types that identify the optional custom modifiers of the field. Gets an array of types that identify the required custom modifiers of the property. Discovers the attributes of a class field and provides access to field metadata. Discovers the attributes of a member and provides access to member metadata. GetValue Object. When overridden in a derived class, returns the value of a field supported by a given object.
GetValueDirect TypedReference. IsDefined Type, Boolean. Inherited from Object. Field Info. Set Value Method Reference Is this page helpful?
Please rate your experience Yes No. Any additional feedback? Namespace: System. Reflection Assembly: System. Sets the value of the field for the given object to the given value. SetValue Object, Object. Sets the value of the field supported by the given object. Note Fully trusted code has the permissions that are needed to access and invoke private constructors, methods, fields, and properties using reflection. Note Starting with the.
To use this functionality, your application should target the. I know MSDN says you can access them if the code is fully trusted, but what that means? I added at the end some code I used. Then, if the field is static everything works fine, but it doesn't work for public fields. When I try to get the value it returns an ArgumentException "Object type cannot be converted to target type" What target type??
Is there something I miss about GetValue? Load Assembly. GetField fieldName ; Console. WriteLine "Name : ", fi. WriteLine "object fi null!!! ToString ; Console.
WriteLine "FieldType : ", fi. GetValue fi ; if obj! Follow Post Reply. It's not the return value that can't be converted - it's the parameter to FieldInfo. You're passing "fi" itself, rather than a reference to an instance of Class1.
Look at the documentation for the parameter to GetValue for more information. Thank you again Jon, I missinterpreted the documentation. Here's the meat. This is the important part. Now we can drill down to the value of f1 note the pattern. Thursday, September 3, PM. Thanks Reed, Your answer was perfect, but my question was wrong. Once I have the field name, "field1", I need an object reference to "structB" to get the value. All I have is a reference to the outter-most object, "structA".
Thanks again. Hey Gordon, That's pretty much what my recursive code does in that snippet I posted. It calls itself passing the field value of the struct as the object to get data from. Maybe you already know this, if so ignore this post. Friday, September 4, PM. Gordon, This is a common problem with value types. Unfortunately, there's no direct way to make a reference to a value type easily in. The best option is to usually wrap the value type in a class, so you're working with references.
When you're done with your editing, you can recreate the value structure. However, I would say that, in general, if you find yourself in this type of situation, you're probably better off trying to switch to reference types in your design. Nested and mutable value type structures tend to be signs of a flawed design - they're really something that should be avoided, for many reasons.
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