Use The "Handles" Clause From VB With A DLL Written Using C#?
Sep 8, 2010
In a Visual Basic .NET application, is there a way to use Handles on an object referenced in a DLL written in C#? Compiling the code gives me the error: 'Handles' in modules must specify a 'WithEvents' variable qualified with a single identifier.
I'm writing the Visual Basic .NET application, but I do have the source code of the C# library available.
My current code looks something like this:
WithEvents Friend Module As ModuleNamespace.Module
Sub EventHandler() Handles Module.Events.Event1
Console.WriteLine("Event1 fired.")
End Sub
Replacing Module, ModuleNamespace, and Event1 with the actual names.
Is there a way to simply the Handles statement? What if i want this sub to handle 20 textboxes do I have to list each textbox there? I already have a loop in my script so i can cycle through my textboxes ("TextBox" & i.text). is there anyway to use a variable or a function after handles to get all the names of the text boxes?
Private Sub textChange(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress,TextBox2.KeyPress, TextBox3.KeyPress, TextBox4.KeyPress, TextBox5.KeyPress
i'm a .net programmer, using .net framework 4, and i have a question about WithEvents clause. [code] Private Sub mylist_AddingNew(ByVal sender As Object, ByVal e As AddingNewEventArgs) Handles mylist.AddingNew..i get this error: Handles clause requires a WithEvents variable defined in the containing type or one of its base types.I think the problem is my custom bindinglist class....but how can i solve this?
I've just opened a project I was working on yesterday perfectly well only to find it's gone nuts. I'm getting this error ..."Handles clause requires a WithEvents variable defined in the containing type or one of its base types."... on each one of my Sub declarations!
Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
in the following code..
Public Sub selCurrentManuf_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles selCurrentManuf.SelectedIndexChanged End Sub
I created a lable to handle DateTime = Now, It works fine. but when I moved it inside a FormView I Get the following Message. Handles clause requires a WithEvents variable defined in the containing type or one of its base types?
I am auto generating data grid and I am using check box in Data grid View,Now i am invoking check box state changed event but it produces the following error Handles clause requires a With Events variable defined in the containing type or one of its base types.
Here the code
Private Sub PRNT_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles PRNT.CheckedChanged Some Stuff. End Sub
I am in the processing of moving an app from VB to C# but some of the classes I will just be moving to VB dlls to access from the main C# app. In doing this I am trying to get the VB dlls to utilize the main C# class lib. In this C# lib I have an abstract clase called base process, it sets up a background worker and handles all the progress tracking, errors, and even reports an ETA. To use this in a derived class in C# you would just do this...
public class SomeLongProcess : Common.Multithreading.BaseProcess { public void start()
[code]....
The problem is that if I do the equivelant in VB I get an error "Handles clause requires a WithEvents variable defined in the containing type of one of its base types". Well I can't do a WithEvents in the base class because it is C# so..
Quote:Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
That error is on both of these, in blue
Private Sub SpellChecker1_DeletedWord(ByVal sender As Object, ByVal e As NetSpell.SpellChecker.SpellingEventArgs) Handles SpellChecker1.DeletedWord 'save existing selecting
[code]....
I have added the reference, I have also added them to the toolbox. My dictionary is all set. What did I miss?
i am getting errors on last two event handlers. what did i do wrong?
Error - Handles clause requires a WithEvents variable defined in the containing type or one of its base types.D:Shipping ApplicationShipping ApplicationForm1.vb75136Shipping Application Error - 'PrintDocument1' is not declared. It may be inaccessible due to its protection level.D:Shipping ApplicationShipping ApplicationForm1.vb1119Shipping Application
Just upgraded a VS 2005 ASP.NET 2.0 website to VS 2008 ASP.NET 3.5. There was an error on the Sub Button_Click. It seemed to be a minor error, the website and the button worked just fine, as usual. What does the error mean?
Protected Sub btnDEreports_Click(ByVal sender As
[code]...
Error 20 Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
When I attempt to run a program I just finished coding I get the following message: "Error 1 Handles clause requires a WithEvents variable defined in the containing type or one of its base types." Looked it up online and still does not make sense to me. If I need to paste code or anything else let me know and I will do so ASAP.
Protected Sub Menu1_MenuItemClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.MenuEventArgs) Handles Menu1.MenuItemClick End Sub
In VB.net, we have the Handles keyword, I'm wondering if C# has anything comparable. Or do you have to manually wire all the methods to each control's event (in ASP.NET especially)?
The short program below runs just fine when it is the only item on a form. However, when I put it into the ItemInsertTemplate of a ListView control, I get the following message:
Handles clause requires a WithEvents variable defined in the containing type or one of its base types
Line 30: Protected Sub btnDate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDate.Click
The error message identifies Line 30 as the problem.I get the same message for Sub clnEvent_SelectionChanged How do I correct this?
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="clnControl.aspx.vb" Inherits="clnControl" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">
I'm migrating some code from VB.NET to C# (3.5).I find structurs like:
Public Event DataLoaded(ByVal sender As Object, ByVal e As EventArgs) Protected Sub Mag_Button_Load_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Mag_Button_Load.Click [..]
[code]....
What is the most streight-forward to translate such behavour in C#?
I am making a webbrowser and I am now trying to make the XButton1 go back. I have that working but I can not get it to work when the WebBrowser is active. My cursor has to be over the form (Me.MouseDown) I can't use WebBrowser.MouseDown because there is no browser until the application is opened. It is a a tabbed browser. The first browser is created like this.
Try Dim Tab As New System.Windows.Forms.TabPage Dim Browser As New System.Windows.Forms.WebBrowser Browser.Dock = System.Windows.Forms.DockStyle.Fill
Using Visual Studio 2008 I am trying to create two subs using the same handles:
Private Sub checkwin(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click, Button2.Click, Button3.Click, Button4.Click, Button5.Click, Button6.Click, Button7.Click, Button8.Click, Button9.Click
[Code].....
As these both use the same handles one sub overwrites the other...... Both subs contain If statements. Do I need to create two different handles... and how do I do this so that the handles use the same buttons?
I have a simple program that was written to access data from multiple access tables. I have everything running perfectly however I did encounter an error with the exit button. I have removed the control from the window and replaced it with a exit button on the form. However I am getting an error reading: "Handles clause requires a WithEvents variable defined in the containing type or one of its base types."I am a little confused because I have this exact same line of code in two other programs and it runs fine. I have read up on this and I know that I need a line of code that reads something like " Friend WithEvents Button1 AsSystem.Windows.Forms.Button" However I am not real clear on what friend means here and where exactly the With Events goes in my code?
Code for exit button Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click'The problem is with this line of code'
If I have two instances of the same form open, and one is on top of the other and I want to go to the one on the bottom, I have to click the form to bring it to the front.. I changed this so that if i click the panel(which represents the forms background) I have it bring it to the front.. But now I am having the issue where I click a control in that panel it wont bring it to the front.. So i know how to do this.. I can make a procedure handle all the controls onclick events by typing each controls name.click event
What i want to do is grab the handle of a webbroswer control and only read the co-ordinates within those bounds. I have successfully manager to do this but the problem i am now having is moving the mouse to those co-ordinates, for some reason after getting the handle and moving the mouse:
Windows.Forms.Cursor.Position = WebBrowser1.PointToClient(New Point(x, y)) It still reads full screen co-ordinates.
sub I use on all forms in my app I would like to put in one central place (of course right). in vb.net I put this sub in a module it has a "Handles tabcontrol1.Drawitem" - I get an error saying handle requires with events variable defined in containing type or one of its base types.also when I refer to tabcontrol1 in a module it wants to know which form.. Can I use sender to define current calling form?
sub Private Sub TabControl1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles TabControl1.DrawItem Dim g As Graphics = e.Graphics Dim tp As TabPage = sender.TabControl1.TabPages(e.Index) Dim br As Brush
I've been using Shell() to launch an application, and Process.GetProcessById() to get the handle to that window, but I think I'm running into problems when passing the handle around to various functions. What is the best way to declare and pass windows handles so that they will be usable? After viewing the debug, it seems the Shell() and Process.GetProcessById() work fine. After I pass the handle off to the functions I need to use them in, the program starts spitting out garbage, and not doing what I want it to do. Short version of the proces
Private Sub UpdateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UpdateButton.Click MyUpdate.CheckUpdate("version.txt")
I have a problem that i can't understand. My Handle Click event does not work !Specifically i have a table (1 row 2 columns). In the first cell i have a datagrid and some text boxes and a button. My button does not work ! In the other cell i have text boxes as well and a button, here, at the 2nd cell the button works! What's the problem then
Just about every day as I build my app and run/test it, I click on a control (button, grid, anything) and nothing happens.I double-click the control in design mode, and it's like clicking on a new control, no code is there.It turns out that the control loses the part of the line of code.[code]This has happened so often that I know I'm not deleting it accidentally.
Check process handle count:In Task manager, View, Select columns, mark Handle Count to the view.(The process when loaded has about 333 handles)
Operation:The new thread is set equal to an existing thread, then the existing thread is started and aborted. How does one restore the old handle count? Why do the handles increase by a random number and do not revert?
How can Idisposable/CloseHandle/or GC.collect, Finalize() work in this situation? I'm trying to return the handles to their original count, 333, when I start a new thread it adds 4,5, or 6 handles per new thread(even if the thread is aborted and set to nothing).
