Is A Delegate Type And Requires A Single 'addressof' Expression As The Only Argument To The Constructor

May 10, 2010

I got 2 classes in a form, and I would like to pass a value from a textbox to the other class, so I decided to use Deligate.

Below is the code.

Public Delegate Sub delPassSize(ByVal text As TextBox)
'To get size from Class Calculate(Class 2)
Public Sub GetSize(ByVal txtForm1 As TextBox)

[code]....

and the error message is 'cls.Getsize is a delegate type and requires a single 'addressof' expression as the only argument to the constructor.'

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Delegate 'System.Threading.ThreadStart' Requires An 'AddressOf' Expression Or Lambda Expression As The Only Argument To Its Constructor?

Jan 23, 2010

I got this Error. below is my code.

GenerateTheList is function.Need help
Private Sub buttGenerate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttGenerate.Click
Dim thread1 As New Thread(New ThreadStart(GenerateTheList))
thread1.Start()
End Sub

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Error : 'AddressOf' Expression Cannot Be Converted To 'Integer' Because 'Integer' Is Not A Delegate Type?

Aug 11, 2011

I faced an error when upgrading VB6 code to VB.NET. The error occurs at AddressOf WindowProc

AddressOf expression cannot be converted to 'Integer' because 'Integer' is not a delegate type

My declaration for SetWindowLong is:

Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA"(
ByVal hWnd As Integer,
ByVal nIndex As Integer,[code]....

What is the reason for the error I get?

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'AddressOf' Expression Cannot Be Converted To 'Integer' Because 'Integer' Is Not A Delegate Type

Aug 3, 2009

I am a newbie in VB and I got a piece of code which can display the current running program. I need to use that in VB2005 and I got the below error message. Can anyone help how to fix it?[code]

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'AddressOf' Expression Cannot Be Converted To 'integer' Because Integer Is Not A Delegate Type

May 13, 2009

I'm trying to convert a VB6 project to .NET, but I get problems with some callback functions, and the following message comes up: "AddressOf' expression cannot be converted to 'integer' because integer is not a delegate type" I've seen several solutions to similar problems like this, but I am not able to understand this issue with delegates.

After the conversion, the code look like this:

Declare Function vsmsgwSetDataPackageCB Lib "vsmsgwW.dll" (ByVal PACKAGE As Integer, ByRef arg As Integer) As Integer
Dim arginitP As Integer

[Code]...

Which gives the error: Method 'Public Function PackageCB(HisNodeID As Integer, ByRef data() As Byte, ByVal length As Integer, ByRef arg As Integer) As Integer' does not have the same signature as delegate 'Delegate Function DelegatePackageCallback(hwnd As Integer, lparam As Integer) As Integer

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'AddressOf' Expression Cannot Be Converted To 'Object' Because 'Object' Is Not A Delegate Type

Sep 1, 2010

I have user control which has one button. To handle click event of button I have added following code in usercontrol.

Public
Sub ChangeClickHandler(ByVal
[Delegate] As EventHandler)

[code]....

Now, I want to handle this click event where I call the this usercontrol. I call the usercontrol through reflection so I get the control in a form of object.

Dim button as object button.ChangeClickHandler(AddressOf mymethod), this line gives me error "'AddressOf' expression cannot be converted to 'Object' because 'Object' is not a delegate type."

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C# - Fix AddressOf Requires Relaxed Conversation To Delegate Error

May 23, 2011

This is a mix of C# and VB.Net. I have a C# class with with 2 delegates:
public delegate string GetSettingDelegate(string key);
public event GetSettingDelegate GetSettingEvent;
public delegate void SetSettingDelegate(string key, string value);
public event SetSettingDelegate SetSettingEvent;

In a VB class I add handlers to the event:
AddHandler _gisCtrl.SetSettingEvent, AddressOf SetSetting
AddHandler _gisCtrl.GetSettingEvent, AddressOf GetSetting

When I try and remove the handlers:
RemoveHandler _gisCtrl.SetSettingEvent, AddressOf SetSetting
RemoveHandler _gisCtrl.GetSettingEvent, AddressOf GetSetting

SetSetting is OK but GetSetting throws a warning:
The AddressOf expression has no effect in this context because the method arguments to AddressOf requires a relaxed conversation to the delagate type of the event.

Here are the methods
[Code] .....
How to fix this and why it is thrown in the first place? The 2 delegates/events/methods look similar enough that I don't know why one is OK and one throws a warning.

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VB6 DLL Takes Callback As Integer, Requires Delegate Reference Type?

Dec 21, 2009

I have an issue with a third-party COM+ DLL meant to be used from VB6, where it has a function to set a Callback for a hardware event. However, I'm using VB.NET, and AddressOf now returns a reference type instead of an integral type, which means that the setCallback function on the COM+ DLL apparently can't be used.

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Pass A Delegate Into A Constructor Of An Abstract Class From A Descendant's Constructor?

Feb 15, 2010

I have an abstract class which requires a delegate to function. I pass the delegate into the constructor. Now that I have a non default constructor I need to call the abstract class's constructors from the concrete class which means that I need to use MyBase.New(...). I have included a quick example below.

Public MustInherit Class BaseClass
Public Delegate Sub WorkMethod()
Private _Work As WorkMethod

[code]....

I have tried to do this but I keep getting the following error: "Implicit reference to object under construction is not valid when calling another constructor".Can I not do what I am trying to do above? I initially had the delegate setup in its own setter method. But then I am creating a deceptive API because it does require a point to a method to work properly.

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Create Expression Where Delegate Type Is Unknown At Compile Time?

Sep 21, 2011

I have a code below to make collection that bind to a gridview able to sort by clicking on the column header. The problem here is "IPerson" is unknown at compile time. I want the delegate type able to decide by getting from gridview datasource.[code]....

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C# - Solve This Error "Cannot Convert Lambda Expression To Type 'string' Because It Is Not A Delegate Type"

Jun 12, 2010

. I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue

[Code]...

Above code should displays drop list of employees first name and last name in a combo box

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.net - Addressof Syntax Without Delegate

Jul 8, 2011

I am using this delegate to invoke my methode:

[Code]...

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Use Anonymous Delegate Instead Of AddressOf

Jul 16, 2010

Is it OK to use anonymouse delegates instead of AddressOf?

[Code]...

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AddressOf, Delegate And Upgrade Code From VB6?

Jan 17, 2012

I am converting some VB6 code to VB.Net - specifically callbacks.VB6 code in Form_Load:

[Code]...

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Can't Convert A Delegate (from AddressOf) To A Long?

Feb 19, 2009

I am using the EnumWindows API Call, and I've looked at an API website. It can't convert a Delegate (from AddressOf) to a Long, so I made a delegate type for it. (Uh-oh, already.) I need to know something that will take the returned IntPtr and get the window title, so I can activate it with another API call and send some keys.

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UPGRADE_WARNING: Add A Delegate For AddressOf AppBarProc

Nov 3, 2009

[URL] I am trying to run this code in VB 2008 to see how it works (I'm learning) and I am getting an error that says:

UPGRADE_WARNING: Add a delegate for AddressOf AppBarProc

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Silverlight - .NET - Send Delegate Through The Classes To Set AddressOf?

Jan 11, 2010

How can I put AddressOf, from another class?I get this error 'AddressOf' operand must be the name of a method (without parentheses). "Is there an Eval () function in VB.NET? Or how does one do this?

Public Shared Property e As UserControl
Public Shared Sub SetButton(ByVal button As String, ByVal Objekt As [Delegate])
Dim errorbuttom1 As Button = e.FindName("errorButton1")
AddHandler errorbuttom1.Click, AddressOf Objekt
End Sub

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.net - Pass An Expression To Act On A Single Field In An Anonymous Type In LINQ?

Mar 27, 2012

I have the following Data Transfer Objects defined:

Public Class MemberWithAddressesDTO
Public Property Member_PK As Integer
Public Property Firstname As String
Public Property DefaultAddress As AddressDTO
Public Property Addresses As IQueryable(Of AddressDTO)
End Class

[Code]...

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.Net CodeDom - Create Delegate With AddressOf Operator Equivalent?

Apr 25, 2011

Is there a way to create a delegate instance in .Net using CodeDom? I want to generate something which looks like the following:Dim myDelegate As someDelegateType = New someDelegateType(AddressOf implementingMethod)Below is more info on the context...Original Question:I am using CodeDom from the .Net framework (v3.5 if it matters) to generate a class. One of the classes defines a delegate method which in VB.Net looks like:Public Delegate Function filterByIdDelegate(ByVal obj As Object, ByVal id As Integer) As BooleanI then have a method which will provide the implementation:Private Function filterById(ByVal obj As Object, ByVal id As Integer) As Boolean Return (obj.ID = id)nd FunctionHere's the problem; how do you create an instance of the delegate (using the equivalent of AddressOf for VB.Net)? I am currently doing this (<filterByIdFunctionName> is a string holding the name of the delegate function, `' is the name of the delegate field):

Dim getFunction = New System.CodeDom.CodeMemberMethod()
With getFunction
'Declare delegate instance

[code].....

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AddressOf' Expression Or Lambda Expression

Feb 22, 2009

From this code

[Code]...

If I put New Action(AddressOf PrivateMesage), then I get the following error: Bounds can be specified only for the top-level array when initializing an array of arrays. on the following code

[Code]...

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Make A Delegate To A Constructor?

Jul 24, 2009

Is it possible to make a Delegate to a Constructor? For example:

Class Bar
...
End Class[code]......

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Passed To Constructor Of A Delegate?

Aug 31, 2011

While creating instance of a Delegetae there comes a intellicence AddressOf , Sub and Function .

AddressOf signifies the address of the function or Sub , what does Sub or Function signifies ?

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'AddressOf' Expression Cannot Be Converted To 'Integer'

Oct 13, 2009

im converting a vb code to vb.net from simpleocr site but i can't run this code because of error in sub calling (ret = objOCR.OCRSetOutputHandlerX(AddressOf myOutputHandler)) :

Code:
'AddressOf' expression cannot be converted to 'Integer' because 'Integer' is not a delegate type.here's the code:

Code:
dim strOCRResult as string = ""
Private Sub DoOCR (filename as String)
Dim objOCR as SimpleOCR 'SimpleOCR object

[code]....

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'AddressOf' Expression Cannot Be Converted To 'Integer'?

Jan 23, 2011

im converting a vb code to vb.net from simpleocr site but i can't run this code because of error in sub calling (ret = objOCR.OCRSetOutputHandlerX(AddressOf myOutputHandler)):

Code:'AddressOf' expression cannot be converted to 'Integer' because 'Integer' is not a delegate type.I googled around but i did not found any solution here's the code:

[Code]...

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Method Invoke Use Delegate As Argument?

Aug 16, 2010

I have some code in c#

BeginInvoke(new MethodInvoker( delegate() {myAppMethod_Tick(sender, e); }));

Now, When I tried to convert that code to vb.net I have below..

BeginInvoke(New MethodInvoker(Function() Do myAppMethod_Tick(sender, e) End Function))

But it does not compile.. What's problem for it?

Because my c# application works ok without any problem..

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Sql Server - Assign The Value I Queried To A String Which Is An Argument In A Procedure If The Argument's Data Type Is An Object?

Dec 5, 2011

I made this procedure re-use a select query:

[code..]

And I use it like this if I would want the selected value placed in a textbox and it works fine

[code...]

However if I want the value to be passed in a string like so:

[code...]

The string ends up having an empty string value. How do I assign the value I queried to that String?

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Java - Multiple Argument Constructor Cannot Call Each Other Itself

Mar 29, 2012

I have recently found out that no argument constructor and multiple argument constructor cannnot call each other in turns. What is the underlying reason of this limitation? Some might say that constructors are where resources are initialised. So they must not be called recursively. I want to know if this is the only reason or not. Functions/methods/procedures can be called recursively.

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AddressOf With Parameter - Method Which Requires A Parameter To Be Passed In

Mar 1, 2009

I have a method which requires a parameter to be passed in. I would like to use the Addhandler to call the method through a dynamically created button control's click event.

When I include () in the AddressOf, VS complains: 'AddressOf' operand must be the name of a method (without parentheses).

When I exclude the brackets, VS complains: Method '...' does not have a signature compatible with delegate...

My code:

CODE:

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VB Lambda Expression For Sub Delegate?

Nov 29, 2010

There is the code:

Private Sub InsertItemInCache(Of T)(ByVal item As CachedItem(Of T), ByVal dependency As AggregateCacheDependency, _
ByVal key As String, ByVal updateCallBack As CacheItemUpdateCallback)

[code].....

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Creating A Lambda Expression With Delegate?

Jul 16, 2010

I am Creating a Lambda Expression, but it' not getting me the write Out put :

Public Class Form1
Delegate Function GetLastChar(ByVal S As String) As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[code]....

I want Send a Name like "Arindam" and its return me "m", the last character.but in messagbox return value shows "fasle" I can't under stand why it's showing "False" instead of "m", the last character.

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