Function Have A Non Compatiable Signature With This Delegate?
Oct 26, 2011The compiler is telling me that these signatures are incompatiable, but they seem fine to me.[code].....
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Nested Function Does Not Have The Same Signature As Delegate 'System.Func(Of Object)'
Apr 5, 2012I have a section of code that deletes a lot of columns, one at at time, based on conditions that arise. Currently it does this:
objrpt.objXLSheet.Columns(col) _
.EntireColumn.Delete(Excel.XlDeleteShiftDirection.xlShiftToLeft)
There are so many of these, that I'm getting tired of looking at these lines so I want to curry the references to the Excel stuff.I tried:
Dim DelCol As Func(Of Integer) = Function(col As Integer) _
objrpt.objXLSheet.Columns(col) _
.EntireColumn.Delete(Excel.XlDeleteShiftDirection.xlShiftToLeft)
but that won't compile, giving me the error: "Nested function does not have the same signature as delegate 'System.Func(Of Integer)'. Ah forget it. I see that I'm trying to call a method from a function. I guess that won't work.Wait, I'm now trying it another way. I first defined a function:
Private Function DeleteColumn(ByRef objrpt As ExcelReport, ByVal col As Integer) As Object
DeleteColumn = Nothing
Dim objrng As Excel.Range
[code]....
Now the error message is a little different:
"Nested function does not have the same signature as delegate 'System.Func(Of Object)'.
Get A Error" Method 'Private Shared Sub Ping Does Not Have A Signature Compatible With Delegate 'Delegate Sub ?
Jun 1, 2010Code:
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)'.
AddHandlers : Does Not Have The Same Signature As Delegate?
Apr 5, 2009for few solutions it work outs well but not for the following code. I find an error when executing the following code. I find an error :
ErrorMethod 'Public Sub test()' does not have the same signature as delegate 'Delegate Sub DataRowChangeEventHandler(sender As Object, e As System.Data.DataRowChangeEventArgs)'.C:UsersKashifDocumentsVisual Studio
[code].....
VS 2010 Does Not Have A Signature Compatible With Delegate?
Mar 14, 2012useing vs 2010 i got this code
vb
Public Sub SetText6(ByVal [text] As String, ByVal textbox As TextBox)
If Me.TextBox1.InvokeRequired Then
[code].....
Make A Basic Client And Listener Chat Room - : Error1Method 'Private Sub CliInfo' Does Not Have A Signature Compatible With Delegate
Dec 9, 2009Im trying to make a basic client and listener chat room but im having problems with method invoker.
Error: Error1Method 'Private Sub CliInfo(CliMess As String)' does not have a signature compatible with delegate 'Delegate Sub MethodInvoker()'
Imports System.Net.Sockets
Imports System.Threading
Imports System.Text[code]......
Specifying A Datatype In Signature Of A Function?
Sep 8, 2009I am trying to define a function that I would like to specify a datatype as in input of the function. The only/best way I evision doing this is by making a enum with the range of datatypes the function will accept and us the enum as part of the function's signature.
example
Enum MyDataTypesString
Int32
DbNull
[Code]....
Function Overloading Add Result Type To Parameter Signature?
Dec 7, 2009Can someone on the VB language team explain why a function result type is not part of the parameter signature?If it were then function overloads would also work for functions that only differ by the result type. In some cases, this is useful (aka cleaner code) especially when you have strongly typed data.
Other languages have this and implement it by considering the function result as an OUT parameter either as param 0 or at the end of the param list (stack) so existing type matching verification can be performed by the compiler.
In VB, the workaround is just messy and would be easily fixed by a language change. This example is overly simplified and not meant as a solid justification for the request Say you have a parse requiirement that takes a comma delimited string in the form: "31,32,33,34" or "bob,carol,ted,alice"
In you code,
[Code]...
Smart Device Framework Signature Panel - Draw Signature In Full WinForms App
May 15, 2011I'm planning on using the Smart Device Framework 2.3 to use the signature control panel in a Windows Mobile 5 application using the compact framework 3.5.
The control has the option to save the signature as either a byte array of points, or as a bitmap. Now seeing as I want to store the signature in a sql compact database, I guess the byte array is going to be better. The trouble is, I'm not sure how to render that in a full WinForms application after I've transferred it back to the desktop.
I need to show the signature on a report, so it would need to be an image I could link/embed into the report.
Convert C# Delegate Function?
Oct 2, 2011Here there's an old question about this code.
xmpp.OnLogin += delegate(object o)
{
xmpp.Send(
[code]....
Function Calling Using Delegate?
Feb 2, 2011I have one master page and then content page on the master page and also have one UC on the master page, now i want to filter data from usercontrol on and populate on content page using delegate.
I have achieved this in C# but i am not able to do this in VB.NET
Because in VB.NET i am not able to overload event of the uc.
Dynamically Change The Function Of A Delegate In .NET?
Jun 18, 2009Suppose I have a class that represents a product to be priced using one of a number of different pricing strategies. This pricing occurs hundreds of times per second, so to eliminate repetitive if/else statements I am instead using a delegate to launch the appropriate strategy, like so:
Private Delegate Sub PricingModel(ByVal params As PricingParameters)
Private myPricingModel As PricingModel
Private myPricingParameters As PricingParameters[code].....
But this doesn't look right to me (though it seems to work). Is there an accepted/better way of doing this? Or is this the standard way? Or is this just simply a doomed approach from the start?
Passing Parameters To Delegate Function?
Nov 21, 2010I need to convert the following C# code to VB.NET:
public bool TryGetRewriteMatch(UrlContext url, out RedirectMatch match)
{
// NOTE: Normally this would use regular expression matches, cached database
[Code].....
However, I need to reference Url and ProductID in the function and I don't know how to pass them as parameters or get their values from the original function.
.net - Create And Pass Custom Function As A Delegate?
Aug 5, 2009I 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.
C# - Registering A Delegate Function With An ISO C++ Callback (on Mono)
Apr 8, 2010I am exposing some ISO C++ data types to .Net (mono on Linux to be precise).For the purpose of brevity, I shall refer to C# in my question, although my question relates to all of the .Net languages (with C# and VB.Net being my target languages). So far, I have worked out how to expose the ISO C++ data types in C# class(es) for use in mono -The only problem so far is how to deal with the C++ callbacks. In .Net languages (C# and Vb.Net), I believe 'delegates' are the callback equivalent.
Sticking with C# for now, can anyone recommend a way that I can register the C# delegate functions with my ISO C++ code.The ISO C++ code is a notification library, and I want to be able to "push" the notifications to the mono framework (i.e. C# delegates in this case).My underlying assumption is that the mechanism/steps to implement this would be the same for the .Net languages - I'll just have to code the actual delegates in the .Net language of choice - is that assumption correct?Last but not the least, is the question of thread saftey. The underlying ISO C++ code that I am exposing to .Net (mono to be more specific), is both re-ntrant and thread safe - do I have to do anything "extra" to call .Net delegate from my ISO C++ code?
Delegate Function .net : Error Says Expression Expected
Aug 13, 2010Having problem understanding Delegate error. Error says expression expected, How do I fix?Here is the offending line (#259)....
mylist.ForEach(Delegate Function(P As linkItem) As System.Char[] )
Here is the entire code.
<script language="VB" runat="server">
Function sectionTitle(ByRef f As String)
'Open a file for reading
[code]....
Multicast Delegate: Represents A Multicast Delegate; That Is, A Delegate That Can Have More Than One Element In Its Invocation List?
Jan 30, 2010from 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?
Create A Delegate And Use The Function In Program Called DoStuff()?
Jan 4, 2012For a class, I have to create a delegate and use the function in my program called DoStuff(). There is an error tht says "Method 'Public Sub DoStuff(stringVal As String)' does not have a signature compatible with delegate 'Delegate Sub MyDel()'.
[Code]...
Invoke Parameterized Function Delegate From Background To UI Thread?
Oct 4, 2010What is the Invoke syntax to marshall data from a background thread receive callback method to a function on the UI Thread?(Form1).
Public Class Form1
MyDelegate = New DisplayData(AddressOf DisplayData)
Private Sub Form1_Load()
MyDelegate = New DisplayData(AddressOf DisplayData)
[code]....
.net - Performance Implications Of Implementing A Generic Type And A Delegate In A Function?
Aug 4, 2010I wrote a serializer (to Byte Array) for dictionaries that have a string key, but an object of some sort as its value.I've never implemented a generic type in a function or used a delegate before, so I'm a bit concerned about this being significantly slower than writing a serialization function for a specific type of Dictionary (Dictionary(Of String, MyClass) for example)Should this code be significantly slower due to the use of the generic type or the delegate?
[code]...
It works, and I could loop it and compare it to a more static Dictionary serializer, but I'm more concerned about when I start using this for a lot of different String/Object dictionary combinations, and it'll take me a long time to write a bunch of static dictionary serializers (that's what I'm hoping to avoid in the first place)edit: simplified intro text
IDE :: Capturing Signature From An Electronic Signature Pad?
Apr 16, 2009how can i capture a signature from an Electronic Signature Pad and store it in database. is there any particular api or it can be captured just like capturing an image from a WebCam. Is it manufacturer specific?
View 2 RepliesGetAnsyKey Error "PInvoke Signature Does Not Match The Unmanaged Target Signature"
Jul 11, 2010I was trying to use a GetAsyncKeyState code but each time I run the program an error occers where
[Code]....
'A call to PInvoke function 'WindowsApplication1!WindowsApplication1.Form1::GetAsyncKeyState' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.' The full code is in timer with (1) time interval
[Code]...
Delegate - BeginInvoke - EndInvoke - Clean Up Multiple Async Threat Calls To The Same Delegate?
Feb 9, 2010I've created a Delegate that I intend to call Async.
[Code]...
Invoke An Instance Function Delegate On An Instance Of A Generic Type?
Aug 4, 2010D is a dictionary whose entry values are of Type T..What I'm attempting to do is have a delegate like "Serializer" below that I can invoke on an instance of T, such as "Entry.Value" below.Please see the "return Entry..." line below for my wishful thinking.[code]
View 2 RepliesConverting C# Codes With "Delegate Function"
Sep 8, 2010[Code]...
I tried to convert it using the converter in developer fusion but I got following codes which breaks where the "delegate" code is.
[Code]...
Multithreading - Delegate Within A Delegate?
Mar 23, 2010I am trying to write a VB.NET alternative to a C# anonymous function.I wish to call Threading.SynchronizationContext.Current.Send which expects a delegate of type Threading.SendOrPostCallback to be passed to it. The background is here, but because I wish to both pass in a string to MessageBox.Show and also capture the DialogResult I need to define another delegate within. I am struggling with the VB.NET syntax, both from the traditional delegate style, and lambda functions.My go at the traditional syntax is below, but I have gut feeling it should be much simpler than this:
Private Sub CollectMesssageBoxResultFromUserAsDelegate(ByVal messageToShow As String, ByRef wasCanceled As Boolean)
wasCanceled = False
[code].....
AWS API - Won't Accept Signature
Apr 8, 2011I've tried everything here, but the Amazon Load Balancer API just will not accept my signature.
Whatever I try, I get a "403 SignatureDoesNotMatch" response. I'm probably missing something obvious, but having spent hours trying to figure out what that is, I'm at the end of my tether.
Here's my code:
Public Sub DeregisterInstanceFromLoadBalance(ByVal strServerID As String)
Dim strURL As String
strURL = "http://elasticloadbalancing.amazonaws.com/?"
[Code].....
.net - Create A Signature From Private Key?
Nov 26, 2010I am trying to create a signature from a private key that i have been provided and a hashed value. I am using DSA and the following code but receive the following error:
Invalid type specified. source mscorlib
The error is thrown on this line: ImportCspBlob(pk)
Private Function key() As String
Dim privatekey As String = "-----BEGIN DSA PRIVATE KEY-----" _
& "Key Data"
[Code]....
Create A Signature Block?
Jun 2, 2010Is that an option in the Edit Profile section? If so, where? For some reason, these byzantine web forum interfaces always turn me in circles.
View 13 RepliesCreating Signature In Picturebox?
Apr 27, 2010Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
[code]....
I've done the code above. But after i draw a signature on the picturebox and when the mouse leave the picture box, this error "Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.MouseEventArgs'."