Invoking A Method Via Reflection Causes System.MissingMethodException?
Dec 5, 2011
I am loading an assembly dynamically and invoking a static method from it. The problem arises when the method uses a reference which is not trivial (e.g. mscorlib or System.Core) - I get System.MissingMethodException. I have tried going through the references assemblies of the loaded assembly and manually loading them all, thus forcing them to be loaded onto the AppDomain. I have checked CurrentDomain.GetAssemblies, the assemblies are loaded.
View 1 Replies
ADVERTISEMENT
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]....
View 10 Replies
Jan 2, 2012
I am getting an error when I try and run my service. I made sure everything in the project is VB .NET 2.0.This service used to work, but we have been making code updates... I did some research but I do not see anything relevant. Does this error mean that my function cause the issue? Or is it the List that is the issue?
[Code]...
View 1 Replies
Mar 9, 2009
I am targetting framework 3.5 using a OneClick Deployment, code and packaging done in Visual Studio 2008 Standard Edition.I have code which works in my debug environment, and when installed on the development machine. It also works on one other machine. However, three other machines are throwing exceptions.The situation throwing the exception is that I have a serial port I am accessing, which is open, and which has been successfully opened. I then try to close the port using the following
[Code]...
View 5 Replies
Jan 6, 2011
I have an interface ITest with a method GetResult(). I have a class Test which implements ITest and thereby defines private method GetResult().
Next I create an instance of Test in a different class. The code is as below:
Module NewClass
Public Sub New()
Dim i As ITest = New Test()
[Code]....
I am migrating existing code from VB 6 to VB.NET and hence I'm not supposed to change the access modifier of GetResult. Leaving it Private will throw InvalidCastException Unable to cast object of type 'System.Object' to type 'ITest'
Object type variable o is used in many places and hence I don't want to change that. And yes, Test implements ITest.GetMember with a different name.
View 3 Replies
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.
View 2 Replies
Dec 14, 2010
I have tried several versions of this with no luck. The casting of the worksheet works as my data is entered in other parts, but I have a section where I need to add data 1 column right of the cell containing the 'str(0)' value. Most of these parameters are optional. I have even tried the System.Reflection.Missing object.
[Code]...
View 5 Replies
Jan 15, 2007
Our company has an app that load their components by System.Reflection.Load (By the way, an awesome technique )But, we start to monitorate the application and detect a extrange grow up of memory (actually when our application still all day on air, their allocate memory on task manager is 200 MB plus memory) And all of our components (60 plus DLLs) is load by this technique.My doubt is how to deallocate this assemblies or how the best way to deallocate any assemblies loaded by the System.Reflection.Assemblie.Load method?
View 10 Replies
Jan 5, 2012
Is it possible to call a protected method via reflection. I am using this:
Me.GetType.InvokeMember(Stages(CurrentStage),
Reflection.BindingFlags.InvokeMethod,
Nothing,
Me,
Nothing)
Which always calls a method with no params or return. The idea is that the user of my object (transactional processing of business logic) inherits the base class adds in a load of private methods to fire. They then add these method names to a list in the order they would like them fired and the code above will take care of firing them.
It works fine with public methods but not with private or protected methods in the same class (Protected because I have some 'standard' pre built methods to add to the base class). Realistically I could make the methods public and be done with it but my inner nerd wont allow me to do so...
I am assuming this is a security feature. Is there a way to get around this or does anyone have any suggestions on how to proceed but keep my tasty, tasty visibility modifiers in tact?
(NOTE: ITS IN VB.NET but a C# Answer is fine if that is what you are comfortable with).
View 3 Replies
Jun 9, 2009
We are getting intermittent problems on a production server that we cannot recreate.There are two very strange things about the issue. Firstly it's a method not found error on the constructor (ctor) for an exception handling helper class and secondly we have custom errors switched on for remote users and this property is being ignored.
[Code]...
It has proven difficult to get information out of the team responsible for the production servers but I have managed to find out that as far as load balancing is concerned, this site is currently only running on one server (this can be made to switch over onto another if necessary). Given that this is an intermittent problem and there is only one server involved, then I find it difficult to believe that this could be an assembly issue. Surely if it was then the problem would occur every time?
View 7 Replies
Feb 6, 2010
I am working on a card game, and i get this werid error:
A first chance exception of type 'System.Reflection.TargetParameterCountException' occurred in System.Windows.Forms.dll
The code that is cousing this error is:
Private Delegate Sub ShowcardDelegate(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
Private Sub Showcard(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
If objtest.InvokeRequired Then
[code].....
View 10 Replies
Nov 16, 2011
I've created a MyFunc extension (in Module Extensions) for all the base types as well as generic arrays, ICollection(Of T) and Dictionary(Of String,T):
Function MyFunc(Of T)(a() As T) As String
Function MyFunc(Of T)(collection As ICollection(Of T)) As String
Function MyFunc(Of T)(dict As Dictionary(Of String,T)) As String
[code].....
View 1 Replies
May 5, 2011
I'm trying to make this code with reflection since I want it to manage Technician and other types too.
[Code]....
View 1 Replies
Nov 15, 2011
I'm designing a .NET-Type at runtime by using the Reflection.Emit-Namespace. Currently, I'm about to generate a method which invokes an already existing method in the generating class:
[Code]...
View 1 Replies
Jun 1, 2011
Im using system.reflection to inject a managed (.net) file directly into memory.This injection works with other managed files, but this file has data in the EOF and it wont run without that data.
View 1 Replies
Mar 4, 2010
I am trying to determine every single reference inside a dll with System.Reflection. However, GetReferencedAssemblies only lists the ones in the "References" (visible in solution explorer).
I would like to determine references from within the code itself, such as an imports statement. Even things like if/then statements, try/catch, absolutely everything.
Is this possible to do using System.Reflection? If so, how?
I would definitely prefer to do this without p/invoke.
View 3 Replies
Oct 3, 2009
I am trying to create an application that will play a movie file, then when it has played the movie, give the user 30 seconds then shut the system down. i have so far made it so that it does everything i need expect when the code for the additional 30 seconds is up i get the following error:
Quote:
An unhandled exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll
Additional information: Exception has been thrown by the target of an invocation.
When i had a message box being made at the same point it worked fine but when i added the shutdown code in it doesnt work so i am confident it is not with the if statements but more the "Process.Start("shutdown /s /t 30")" line.
Private Sub timShutdown_Elapsed(ByVal sender As System.Object, ByVal e As System.Timers.ElapsedEventArgs) Handles timShutdown.Elapsed
If ShutdownTimer = 1 And ShutdownExtraTime = False Then 'Movie Has Played
ShutdownExtraTime = True
[CODE]...
View 2 Replies
Feb 11, 2012
I am making a program that is sort of a frontend to all my other apps. I put the EXEs of those apps into the resources of my frontend. The problem occurs when I try to run the EXEs from memory.
I keep getting System.Reflection.TargetInvocationException on the line:
entryPoint.Invoke(RuntimeHelpers.GetObjectValue(objectValue), New Object() {New String() {"1"}})
[code].....
View 12 Replies
Sep 15, 2011
I am trying to create an Excel file using reflection. The reason, the application will be running on many machines some of which may or not have excel installed. I decided to embed the "Microsoft.Office.Interop.Excel.dll" and via reflection generated the excel spreadsheet. The code I am trying to resemble is:
[Code]....
View 1 Replies
Oct 3, 2007
I am working on a program that requires me to load 2 dll at runtime.My code is as shown below:
View 2 Replies
Jul 31, 2011
so I want to go start using System.Reflection to load my dlls from a special folder as I never did this before and thought I should give it a try. now I'm wondering how to do this. below I have my dll code and my form code I need to know how to use the sub from my dll in my form if I use Assembly.LoadFrom
[Code]...
View 1 Replies
May 29, 2009
I get this error when I try to read data over the serial port using a program that I have written in VB.NET n unhandled exception of type System.Reflection.TargetInvocationException' occurred in mscorlib.dllAdditional information: Exception has been thrown by the target of an invocation.he code which I think causes this error is as follows :
Try
COMPort.Open()
Catch ex As Exception
[code].....
View 18 Replies
Oct 24, 2011
I cannot get the following to work for me: its the section that sets the default for system.data.linq.binary. The database I work with doesn't allow nulls in any field. So I generally run my buffer through this routine to populate defaults and then set the real values independently, (this works when I miss a field). I can set the Linq table field = fakeBinary and it works like a charm. Thus, I don't understand why using reflection can't pull of the same thing.
Ex: Me.CM20500WindowBuffer.Reconcile_Messages = New Byte() {0} works.
Try
Dim fakeBinary As System.Byte() = {0}
For Each fld In nObj.GetType().GetProperties
Select Case fld.PropertyType
Case GetType(Byte)
[Code] .....
View 9 Replies
Jan 29, 2010
I'm passing a type name and some parameters from C# code into a navigation framework written in VB. The navigation framework looks for a constructor on the type that matches the parameters passed in using Type.GetConstructor(Types()). The constructor that I'm looking for expects an array of integers Integer() in vb. But it gets an array of System.Int32. I've gone so far as to try this:
[Code]...
And the VB code still sees System.Int32 on the other end, which means that it doesn't find the constructor.
View 2 Replies
Jul 29, 2011
I am getting following error whenever I want to use IIf function inside entity framework query.
LINQ to Entities does not recognize the method 'System.Object IIf(Boolean, System.Object, System.Object)' method, and this method cannot be translated into a store expression.
View 1 Replies
Apr 16, 2010
What do I need to convert?
Dim CEESearchByAppNo = From CEEsearch In dbCEE.tblScanneds _
Where CEEsearch.AppNo = iAppNo
[code].....
View 5 Replies
Apr 17, 2011
In my ASP.NET app, I'm using classic ADO 2.8 to save some data into an Access database. (Or a Jet database, for those who insist that Access is just the front-end.) So I have a RecordSet containing some data, and I want to set the value for some fields, but first I need to know the field type. So I use the Recordset.Type property:
Dim fieldType = rs("MyField").Type
And that unexpectedly results in an error: MissingMethodException was unhandled by user code -- Error: Missing method 'instance valuetype ADODB.DataTypeEnum [MyProjectName] ADODB.Field::get_Type()' from class 'ADODB.InternalField'.
Considering that it is .NET itself that has created the .NET/COM interop assembly, any idea why?And here's the strangest thing: When the debugger stops and reports the error and takes me to the spot in my code where it happened, and it has that great feature by which you can hover the mouse over any variable etc. and it will show its value -- so I hover over the rs("MyField").Type part, and, lo and behold, it shows the correct value!So if it could evaluate it at debug-time, why did it throw an error at run-time?
View 2 Replies
Feb 20, 2009
Nightmare error: System.Reflection.TargetInvocationException error in VB 2008
View 6 Replies
Mar 11, 2009
following error message:
Method not found: Void Excel.Range.set_Value(System.Object,System.Object)
View 4 Replies
Jul 15, 2010
I have an open source project I converted to vb.net. I solved all the errors, except for one. This is the C# line
[Code]....
View 4 Replies
