C# - .NET Reflection Create Class Properties

Apr 28, 2009

how to create an instance of a class then add properties to the class, set those properties, then read them later. I don't have any code as i don't even know how to start going about this. C# or VB is fine.

My system has a dynamic form creator. one of my associates requires that the form data be accessible via web service. My idea was to create a class (based on the dynamic form) add properties to the class (based on the forms fields) set those properties (based on the values input for those fields) then return the class in the web service.

additionally, the web service will be able to set the properties in the class and eventually commit those changes to the db.

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VS 2010 Reflection, Create A Class With Dynamically Named Properties?

May 11, 2010

I'm trying to make a very simple audio tag editor. The idea is that the user can select as many audio files as he likes from a ListView, and a PropertyGrid will then display their tags + their values.When multiple files are selected, I want the property grid to display the values of the tags that all files have in common, and display empty values for tags that the files do not have in common.As an example, look at the properties list in your Visual Studio IDE when you select multiple controls (of the same type for this matter). Select a few Button controls, for example, and notice that the properties whose values are the same (often things like Font, ForeColor, etc) are displayed. Also notice that the values for properties that are not the same (Text, Name, etc) are empty.

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Using Reflection To Find A Properties Definition Class?

May 18, 2008

I am currently using reflection to retrieve all properties of a class. I return a collection of PropertyInfo objects and all is working fine.

My problem is, I want to check if a property has been defined in a base class implementation and is therefore inherited in the current class.

Asp.net - .Net Iniatialising A Class Using System.Reflection And System.Type To Create A Session Based Singlton Extension Method

Jun 11, 2009

I have had several occasions recently to access a specific class several times over a relatively small time frame.So I've been storing the value of the class in Session and trying to access it on page load, if it's not available creating a new instance and storing that in session.

So instead of constantly replicating the same code for different classes on different pages I'm trying to create an extension method to do this for me.

[Code]...

I'm stuck on what to do when I make my new instance of my class (it would have to have a New() sub)

I'm not sure where to go from here... or even if this is the best way to do it.

Create Individual Properties In A Class Or Just A Method To Set The Values?

Oct 2, 2011

I am learning vb.net and I am having trouble wrapping my head around the following... I can create several properties of a custom class and get/set values or I can create a method to set them all at once. If each property is going to allow read and write should I just make a method to assign values all at once? I assume that I am missing a very important piece here. Example: I can create 2 properties:

[Code]...

Use Reflection To Get A Properties Property?

Oct 6, 2010

I am trying to get the value of local path by doing the following[code]...

Create A Class That Has Properties That Correspond To Column Names In A Database Table?

Feb 24, 2009

I want to create a class (I think) that has properties that correspond to column names in a database table, such that they come up in Intellisense when I type the dot after the class name. Is this possible to do?

.net - Reading Properties In Assembly Via Reflection?

Mar 19, 2011

I have a self-generated code in one assembly which in some of the lines includes properties, I was wondering how can I retrieve them? Especially when that class is a view object and does not contain any parameters so we can do it by data adapter and finding for example insert or update parameter.

Reflection For A List Properties Elements?

Oct 31, 2010

I am creating a dynamic clone method to be used in my custom classes. I want the clone function to be completely generic, so I do not have to make any changes when I add new properties to the class. I am having an issue with regards to making a deep copy a property that is a List. sample code that will enable me to identify with reflection that a property of my class is a List, and then more importantly the code to loop through the the List elements and copy of each of them. I have been able to identify a property as a List by using the NameSpace of the property type, but I'm not a big fan of that method. Either way, I have yet been able to dynamically loop and deep copy the elements of the property that's a List using reflection.

VS 2010 Reflection For Properties And SubProperties

Dec 19, 2011

I am able to use these COM objects but i do not want to due to several problems of binary compatibility on 3rd party software upgrades. So my only option was to use reflection since late binding won't work.I have several Interops and each one of them has several Classes, i do own the dlls structure, classes and methods names and definition but i am not able to use these with reflection due to my inexperience in this field.[code]

Create An Object Of A Class In Which There Are Properties And Functions That Do Database Selects, Updates And Deletes?

Oct 22, 2010

how to implement UI, BL and DAL in a project the way that I see it as a requirement for some projects. The way I am able to do a project now is from a form create an object of a class in which there are properties and functions that do database selects, updates and deletes. Looks to me that doing a project like that is separating the UI from the DAL. In an update button click event I may call Obj. Delete (txtCustID.txt) for example. I don't understand the part of further breaking it down to include a Business layer; in which a vb solution is made up of three solutions.What goes in the BL?Does the BL call the DAL?

Access ExampleObject Properties By Reflection On My BaseExampleObject?

Dec 10, 2009

On my Bussiness Layer, I have something like

Dim object as New ExampleObject

Where ExampleObject inherits BaseExampleObject.I want to know how can I access ExampleObject Properties by reflection on my BaseExampleObject.

Something like:

MyBase.GetType.GetProperty("PropertyName").GetValue(mybase.gettype, Nothing)

Of course thats not going to work because this is not an instance of an object and if I instantiate a new object, I'll lose the reference from my Bussiness Layer.

ASP.NET - Ascx.designer 'properties' Not Showing Up In Reflection At Runtime

Jul 2, 2010

I have a very simple setup, single mycontrol.ascx with assoicated mycontrol.ascx.designer.vb and mycontrol.ascx.vb file.

mycontrol.ascx embeds a single reference to a custom control: "MyMenu":

<mM:myMenu id="myMenu1" runat="server" />

This has created a protected reference in the mycontrol.ascx.designer.vb file:

Protected WithEvents myMenu1 As Global.CustomControls.MyMenu

Now, when I breakpoint the Page_Load() event of mycontrol.ascx, and inspect the members returned from the type via:

Me.GetType().GetMembers()

I cannot any reference to myMenu1. If I look at the control with intellisence, the property is accessible:

Me.myMenu1

what I'm missing and what I need to do to access designer created properties at runtime through reflection?

.NET Using Interface, Reflection, And DLL To Access Main Form Controls Properties?

Jun 10, 2011

I have a main form, a separate plugin interface dll and another separate dll. Now this is my problem:I'd like to access the properties of the controls of the main form for manipulation in the other dll.

Example:
MainForm
Plugins.dll
Data.dll

Main form have label control I define properties in the interface Plugins.dll from Data.dll I load Plugins to read the label control from the mainform.The question is how can I do that?

VS 2010 Using Reflection Difference Between Static And Instance Fields And Properties

Jun 6, 2012

I'm trying to obtain the values using the prospective GetValue(s) methods but I don't understand the syntax of the documentation. I'm sending the correct bindings (I believe) to filter the fields, and properties that i'm interested in usually

[Code]...

Visual Studio 2008 - Reflection - Iterate Object's Properties Recursively Within Own Assemblies?

Sep 11, 2009

I wonder if anyone can help me - I've not done much with reflection but understand the basic principles.What I'm trying to do:I'm in the process of developing a class that gathers a lot of information about the local system, network, etc... to be used for automated bug reporting. Instead of having to change my test harness every time I add a new property, I'd (ideally) like to be able to serialise the lot as an XML string and just display that in a textbox.

Unfortunately, the Framework won't use the default XML serializer on read-only properties (which almost all of mine are) as they wouldn't deserialize properly [Not sure I agree with the assumption that anything serialized must be de-serializable - MS says this is a feature "by design" which I suppose I can understand - Perhaps a tag to indicate that it should be serialized anyway would be advantageous?]

The initial approach was to make properties gettable and settable (with a throw exception on the setter) but the amount of work tidying this up afterwards seems a little excessive and I would want the properties to be read-only in the final version.What I need help with:My current plan is to use reflection to recursively iterate through each (public) property of my topmost gathering class. The problem is, the samples I've seen don't handle things recursively. Additionally, I only want to inspect an object's properties if it's in one of my assemblies - Otherwise just call .ToString on it.

If I don't have the inspection limited to my assembly, I assume I'll get (say) a string which then contains a Length which in turn will have .Tostring method.For the purposes of this project, I can almost guarantee no circular references within my code and as this will only be used as a development tool so I'm not too concerned about it running amok now and then.

Reflection - Getting A Reference To A Class By Its Name

Sep 6, 2010

I'm trying to use reflection to get the instance of a class in vb.net. I have a class 'A' in my web project and to test it, i create a new aspx page and try to write the following:

Dim t as Type = Type.GetType("A")

This returns "Nothing". But if i do this:

Dim inst as A = new A()
Dim t as Type = inst.GetType()
t's type is "A"

So how come i can't get the type with GetType even if the name is exactly the same? It does works for things like System.Math though

Reflection - Set Value Of Array Within Class?

Feb 19, 2009

I'm trying to use reflection to populate the properties of an array of a child property... not sure that's clear, so it's probably best explained in code:

Parent Class:
Public Class parent
Private _child As childObject()
Public Property child As childObject()
Get
Return _child
[Code] .....

The issue is now trying to get that array assigned to the parent object (using reflection). It shouldn't be difficult, but I think the problem comes because I don't necessarily know the parent/child types. I'm using reflection to determine which parent/child is being passed in. The parent always has only one property, which is an array of the child object. When I try assigning the child array to the parent object, I get a invalid cast exception saying it can't convert Object[] to.

Basically, what I have now is:
Dim PropChildInfo As PropertyInfo() = ResponseObject.GetType().GetProperties()
For Each PropItem As PropertyInfo In PropChildInfo
PropItem.SetValue(ResponseObject, ResponseChildren, Nothing)
Next
ResponseObject is an instance of the parent Class, and ResponseChildren is an array of the childObject Class.

This fails with:
Object of type 'System.Object[]' cannot be converted to type 'childObject[]'.

Asp.net - .Net Reflection To Get Description Of Class / Property?

Apr 14, 2010

I know its unlikely but I was wondering if there is any way to get the comments (i.e. the bits after the ''') of a class or property..? I have managed to get a list of properties of a class using the PropertyInfo class but I cant find a way to get the comments / description.. I need it for a guide I am writing for the administrators of my site - it would be great if it could automatically update if new properties are added, so there is no need to worry about updating it in the future too much.

C# - Usage Of FieldInfo Class In .NET REFLECTION?

Mar 11, 2011

<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Dim resources As
System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(_Class))

[code]....

How can I reach that sqlparameter collection via fieldinfo or other related classes in >NET Reflection?

Reflection , Need To Get A Type From A Class Name String?

Dec 30, 2011

What I wanted to do was, given the table name (as string), use reflection to instantiate the get method for specific fields (defined as properties with Get and Set methods.

Public Property VC60() As String
Get
Return _VC60

[code].....

Reflection On Structure Differs From Class?

Jan 15, 2009

Code snippet:

Dim target As Object
' target gets properly set to something of the desired type
Dim field As FieldInfo = target.GetType.GetField("fieldName", _
BindingFlags.Instance Or BindingFlags.Public Or BindingFlags.NonPublic)
field.SetValue(target,newValue)

This snippet works perfectly IF target is set to an instance of a CLASS.However, if target is set to an instance of a STRUCTURE, the code does not actually change the value of the field. No error, but the value remains unchanged.And, oddly, if I'm stepping through code, watch the SetValue fail to do anything, and immediately go to the Immediate window and type exactly the same SetValue operation, that works.

Edit:

Per request from Jon Skeet, actual code:
Private Shared Function XmlDeserializeObject(ByVal objectType As Type, _
ByVal deserializedID As String) As Object[code].....

.net - Reflection Retrieve Private Methods Of A Class?

Sep 13, 2010

I want to retrieve private (implementation and other) methods of a class which implements an interface and also is derived from (inherits) a base class.How can I achieve this using reflection?This is wat m tryin to do. I need to view these private methods and their contents, I don't want to invoke them.

Dim assembly As System.Reflection.Assembly
Dim assemblyName As String assemblyName = System.IO.Path.GetFullPath("xyz.dll")
assembly = System.Reflection.Assembly.LoadFile(assemblyName)
assembly.GetType("myClass").Getmethods(Bindings.NonPublic)
assembly.GetType("myClass").GetMethods(BindingFlags.NonPublic) isn't working

Invoking A Method From A Class Dynamically With Reflection?

Oct 15, 2010

I'm making a little program in where i'm trying to invoke a method from a class dynamically with so called Reflection.The class I'm trying to call is called ContactList and i try to invoke the method in this class called count. The assembly itself is called Contact.ExeNow I have the following code:

Public Function InvokeContacts() As Integer
Dim ContactsAssembly As Assembly = Assembly.LoadFrom("Contacts.exe")
Dim Mycontactlist As Type = ContactsAssembly.GetType("ContactList")

[code]....

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C# - Retrieve Internal Member Of Nested Class By Reflection

Jun 1, 2012

I know that the MenuItem class contains an internal class named MenuItemData, which contains itself an internal member named onDrawItem. Given a MenuItem, I want to retrieve the object corresponding to the member onDrawItem. But all I manage to do is to get the FieldInfo, not the object itself.

Here is my code:
Dim obj As Object
Dim fi As FieldInfo
Dim item as System.Windows.Forms.MenuItem
Dim mType As System.Type
[Code] .....

When reaching the last line, I get an error saying something like that (it's traduced):
The field 'onDrawItem' défined in type 'System.Windows.Forms.MenuItem+MenuItemData' is not a field of the target object of type 'System.Windows.Forms.MenuItem. I don't know what object to pass to the GetValue function on the last line. My goal is to remove the base eventHandler of the menuItem, named DrawItem. See this post and the function RemoveClickEventin the accepted answer for a better understanding.

Reflection - How To Get Variable Names Types / Values In Current Class

Feb 1, 2011

I am working on a project where my class has to execute VB code provided by the user, to make it simple I am trying to recreate my own eval function, I am using the following code I found on the web to do this task.

Imports Microsoft.VisualBasic
Imports System
Imports System.Text
Imports System.CodeDom.Compiler
Imports System.Reflection
[Code] .....

The problem with code is that it can't access any variables or there values, so I have decided to get the variable names, there values types and there types dynamically and recreate them in the class that is being created dynamically. Any way to get the variable names there types and values in the current class or method, so that I can recreate them, and execute the user passed code, the user knows what variables are in the current class or method and there datatypes but he don't know there values as they may have changed, so he can't initialize them. Is there a way to do this, this code will be called in an asp.net page on page_load event, the code passed by the user is stored in the variable vbCode that is passed as a parameter.

Can't Inherit Shared Properties From A Base Class In A Child Class?

Dec 29, 2010

This is another one of my "I think it's not possible but I need confirmation" questions.I have a base class for a bunch of child classes. Right now, this base class has a few common properties the children use, like Name. The base is an abstract class (MustInherit)Technically, this means that everytime a child class is instantiated, it lugs around, in memory, its own copy of Name. The thing is, Name is going to be a fixed value for all instances of a given child. I.e., Child1.Name will return "child_object1", and Child2.Name will return "child_object2".

Reflection - Function Witch Return Type Is The Class Itself In Inherited Classes?

Dec 10, 2011

I have a parent class that is also a factory. For example:

Public Class Factory
Public Function clone() as Factory
' Some logic here

[code].....

Use Reflection To Unit-test An Internal Class Within An Assembly When The InternalsVisibleToAttribute Is Not An Option?

Aug 26, 2010

I have a solution with two projects within:

Company.Project.vbproj
Company.Project.Tests.vbproj

Within the Company.Project.vbproj assembly, I have a class FriendClass.vb which scope is Friend (internal in C#).Now I wish to test this FriendClass.vb from within the Company.Project.Tests.vbproj assembly. I know about the InternalsVisibleToAttribute, but that is not an option in Visual Basic .NET 2.0, as it is only available with C#, in .NET 2.0 (see here).I would like to create myself a proxy class using this internal FriendClass from within my testing assembly, so that I could instantiate it and do the testings accordingly.

Using Reflection To Attach / Detach Handler Of Base Event In Derived Class

Dec 13, 2009

I am just curious, if there is some way to attach handler to my derived classes base event, if I know EventInfo and I have Delegate to handler function. I have tried MyEvent.AddHandler(CType(Me, BaseClassType), MyDelegate) already, but no positive result at all. Consider being in need of attaching handler to custom event at runtime, while derived class possibly shadows this event.

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