.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].....
View 1 Replies
ADVERTISEMENT
Jul 8, 2011
I am using this delegate to invoke my methode:
[Code]...
View 2 Replies
Jul 16, 2010
Is it OK to use anonymouse delegates instead of AddressOf?
[Code]...
View 2 Replies
Jan 17, 2012
I am converting some VB6 code to VB.Net - specifically callbacks.VB6 code in Form_Load:
[Code]...
View 4 Replies
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.
View 8 Replies
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
View 1 Replies
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
View 1 Replies
Jan 10, 2011
Is there a way to use CodeDom to generate an overloaded operator in Vb.net? I want to generate this:
Public Shared Operator =(ByVal x As MyType, ByVal y As MyType) As Boolean
Return x Is y
End Operator
The closest hack I can think of to do this the following:
Dim eq As New CodeMemberMethod()
eq.Name = "Operator ="
eq.Parameters.Add(New CodeParameterDeclarationExpression(New CodeTypeReference("MyType"), "x"))[code]....
Which generates this, close but obviously wrong:
Public Shared Function Operator =(ByVal x As MyType, ByVal y As MyType) As Boolean
Return (x Is y)
End Function
View 1 Replies
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.
View 2 Replies
Sep 20, 2010
can VB.NET operator AddressOf return Nothing in any case?
View 1 Replies
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.'
View 2 Replies
Oct 2, 2011
I put several buttons dynamically on a form, and then try to link them to their separate event handlers with the following (simplified) code:
[Code]....
View 6 Replies
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?
View 1 Replies
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
View 1 Replies
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]
View 18 Replies
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
View 1 Replies
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."
View 2 Replies
Jan 21, 2010
Is there a ?: operator equivalent in .net? eg in java I can do:
[Code]...
I'd like to be able to do similar in VB.NET.
View 1 Replies
Jul 2, 2010
Possible Duplicate: Is there a VB.NET equivalent for C#'s ?? operator? Is there an equivalent in VB.NET to C#'s ?? operator?
View 1 Replies
Apr 20, 2012
What is the equivalent operator in VB.Net for ^ (this is for C#)
View 6 Replies
Nov 22, 2011
I am porting php code to vbnet (i'm a little better at vbnet than c#). In the php is the scope resolution operator.
Here's the bit:
$args = phpZenfolio::processArgs( func_get_args() );
Equivalent in c#/vbnet?The whole function is the following which i gues is equivalent to the sub new in vbnet.
public function __construct()
{
$args = phpZenfolio::processArgs( func_get_args() );
$this->APIVer = ( array_key_exists( 'APIVer', $args ) ) ? $args['APIVer'] : '1.4';
[code]....
View 2 Replies
Dec 18, 2010
today I attempted to create a simple application using codedom.Basically I want to be able to compile a messagebox with the custom text entered in the builder.
This is what I have so far.
ICompiler.vb Class "Codedom" Class and in my main form "the builder I have this
[Code]...
If no one could help me perhaps does anyone have a simple source example?
View 1 Replies
Mar 12, 2010
I have this function in my generator.[code]Despite the data type being passed into the constructor of the CodePrimitiveExpression object being a decimal, the code generated is an integer that gets implicitly converted and stored in a decimal variable. Is there any way to get it to generate with the "D" after the number as in: Public Const DollarAmountMaximumValue As Decimal = 100000D
View 1 Replies
Oct 11, 2011
I am trying to implement this examplebut the only problem I am facing is the AddressOf keyword of VB.net which I am unable to convert in C#.netcanut with this, what alternative I should use to make it work.
View 4 Replies
Oct 12, 2009
I am trying to create a procedure which will evaluate a string expression as if it were a line of code...Kind of like what a graphing calculator does when you enter a formula. Does anyone have any experience with this in VB? I have an example of C++ code which uses CodeDom, but I am a bit rusty with my C++!
View 4 Replies
Jan 30, 2010
from the documentation we have this: Multicast Delegate: Represents a multicast delegate; that is, a delegate that can have more than one element in its invocation list.
so am i right to say that Multicast delegate is no different from a normal delegate other than the fact that it has arguments. so System.Action is a 'normal' delegate whereas System.Action(T)(Byval obj as T) is a multicast delegate?
View 5 Replies
Apr 7, 2009
I am trying to create a delegate(as a test) for: Public Overridable ReadOnly Property PropertyName()As String My intuitive attempt was declaring the delegate like this:
[code]...
So the question is, how do I make a delegate for a property?
View 6 Replies
Feb 9, 2010
I've created a Delegate that I intend to call Async.
[Code]...
View 2 Replies
Jun 1, 2010
Code:
Public Class SendPings
Shared Sub New()
AddHandler Post.Saved, AddressOf Post_Saved[code].....
I get a error" Method 'Private Shared Sub Ping(item As BlogEngine.Core.IPublishable, itemUrl As System.Uri)' does not have a signature compatible with delegate 'Delegate Sub WaitCallback(state As Object)'.
View 4 Replies
Aug 5, 2009
I have a function Process(data, f) where data is a normal parameter and f is a function needed to process the data (passed as a delegate to Process)
The signature of f is int f(a,b,c), with a, b, c supplied by Process when it calls the delegate.
Up until here, standard delegate usage.
Now, I have a special but common case where I would like to call Process with a constant f function. So I would like to write SimpleProcess(data, k) so that the caller does not need to create a delegate in this case, just pass the constant k (the only information needed).
So I need to dynamically create a constant function, g(a,b,c) which takes 3 parameters (which are ignored) and always returns k. This has to be done within the SimpleProcess function, so that I can then simply call Process(data, g) from within that function, without the need to rewrite the whole Process function for this special case.
View 3 Replies
