Pass Combo Control Between Events?
Jun 4, 2009
I'm using VS2008, vb.net, and winforms. I've got 3 comboboxes on the same form who are all bound to the same data. If an item is added in one, I want the change reflected in the other two. I'm trying to create one sub to handle the adding of an item for all three combos. I found that the "sender" object appears to contain the control name. The Sub I created is not working quite right because after the item is added, the combo list display repeats itself. So instead of "Item1, Item2, Item3" after adding "Item3", I get "Item1", "Item2", "Item1", "Item2", "Item3". This coding works fine if I were to copy it to the Key_Down event for each combo and reference it directly (for example, use cboSpecialty1.Items.[code]...
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Dec 31, 2010
I created a control that has picture box control docked within it. This control allows me to "animate" the image by swapping them out by setting the interval to swap them at. I want to use this control kind of like an animated icon within a application, but because the picture box is docked, the control I created won't respond to the events, MouseHover specifically. [Code]
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Jun 21, 2010
choosing a combo box event for placing this code. I have tried with ostfocus,leave,mousefocuschanged,displaymemberchanged like this but nothing works and Lable26(Default I set Visible:false ) is visible even after I select an Item.
If combotype.SelectedIndex = -1 Then
Label26.Visible = True
Label26.ForeColor = Color.Red
[code]......
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Mar 22, 2011
I am having problems while detecting key combo events in my app.
For example, I have Alt+M set to bring up the menu bar like one does in. Windows 7. But I noticed if u press control+alt+M it still calls the menu bar. I also noticed that if focus is on a webbrowser control, none of the combos work. I have keypreview set to true by the way. The webbrowser control is really a custom class that inherrits the standard webbrowser control. Reason for the custom control is because it uses the tab control tag property. I found it in a post somewhere can remember where. I'll post the link to the info in an hour.
Also I noticed during testing of Alt+SOME KEY that when I was holding Alt before I pressed the SOME KEY that it was calling up the code for showing/hiding the menu bar. (I originally used just Alt for the menu)
1) how to better control key combos
2) why does custom browser control "ignore" the keypreview being set to true?
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Nov 10, 2009
Can we pass more than 2 argument to our events, tell me in brief about Events
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Mar 15, 2010
I have 3 click events in my form. I have delcared a string variable called sVariable in the following format: Public sVariable As String but when I try to use the value from the sVariable variable then it does not pass the value to the other click events. so in the Button1_Click event i type the following
[Code]...
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Mar 17, 2010
I am using AddHandler to wire a function to a control's event that I dynamically create:
[Code]...
This code is generating a run-time exception stating: Unable to cast object of type 'MyEventHandlerDelegate' to type 'System.EventHandler' What am I not understanding about System.Delegate even though AddHandler takes as an argument of type "System.Delegate"? What Type does "EventHandler need to be to cast to a type that AddHandler can accept?
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Jul 20, 2009
I am trying to put a new face on an old C program. The C program is, of course, unmanaged code, designed smartly to separate the number crunching and the interface, and the interface I'm trying to replace is X windowing. The graphics part is where it gets a little hairy, because the C is going to need to continue to draw in my new interface, based on the data the program produces. Even if I want to duplicate that data in .NET so that the .NET side can handle all of the drawing, the fact remains I'm going to need to operate on the graphics window in some fashion from C.
I gather that handles have a lot to do with the bare Win32 graphic operations. Is such a similar handle provided to, say, a PictureBox element in .NET? And if so, is it the kind of handle I can use in the unmanaged code without an issue?
I have tried and tried and tried to google for the solution for weeks now, and all I come up with are either C++ solutions (using object-oriented GDI+) or some sort of extension to the C language.
Alternatively, is there a way I can have .NET create a handle specifically for this purpose of having C draw it?
To sum it up, I am using Visual Basic .NET 2008 and a C DLL (also compiled in VS2008), so far in the little testing I've done, I've been able to marshal complex structures to and fro, but I am not sure how exactly I'd let C do any drawing on the .NET form, if that was even possible.
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Jan 7, 2011
How to take a value from a combo box and have it update a field in sql table?
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Jun 19, 2009
How do i pass the combo box value to some batch file.The UI will have following parameters:Month (for which user wants to generate the report) Full name of the month e.g. January, February etc. Year (for which user wants to generate the report) YYYY e.g. 2009 We will use the following approach:User will select the month and year as per requisition. From dotNet call a batch file, and pass the selected parameters to the batch file
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Sep 14, 2010
I have designed my form like this it has a combo box and several text boxes. In the form load I want to load the customer IDs of my customer table into my Combo box.Customer IDs data type is varchar and this part is working in my form.The next thing that I want to do is if a user select a single user ID from the combo box I need to display the first name last name and there are several fields of that selected customer id in the text boxes.If anyone can help me in this it'll be a great help.I have designed my data base in sql server 2008 and I'm using visual studio 2008.I added a new sqldata adapter and I created the data set.But I want to know how to pass the selected id of the combo box as the select parameter of sql statement and how to bind data to the text boxes.
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Jul 23, 2011
I am looking how to set events to a webrowser which is being created by the following:
[Code]...
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Jun 18, 2009
If I would like to fill a listbox with the Events of the current Control on a form, how do I then do that I work with Visual Basic in VS Studio.
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May 3, 2009
Is it ok for me to have this event - firing on TextChanged for my BillingSame textbox
[Code]...
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Oct 25, 2009
I have code that reads file paths froma text file into my application for an mru list on my apps main menu. The menuitems are added programatically from each line of the text file. How can i attach events to these menu items?
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May 3, 2011
I have never dealt with dynamic control events before. I have a variable number of a controls each created at runtime. However I don't know how to code events for each control as they should do different things. I've looked at WithEvents and AddHandler and know I have to use Sender however not sure how to use /where to put eg. MouseEnter 1 panel when there's several.
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Mar 23, 2009
I declared a browser in my VB.NET project (Dim browse as new WebBrowser). How am I supposed to get to the events (browse_NewWindow) of the declared thing?Oh yeah, my code for my browser is CType(TabControl1.SelectedTab.WebBrowser(1))
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Oct 2, 2007
I just opened up an Asp.NET project solution for some maintenance. I usually use C# but this project is in VB. When clicking on a form's button and looking at the properties view, I see no way to view the events for that button. Usually the lightning bolt button would be present in the properties view and clicking it would show all events for the control. From there you could see the event handlers or create an event handler by double clicking. Why don't I see that in this project. Is it an IDE setting or a VB project thing?
P.S. I thought I was in VS 2005 but it's 2003. 2003 usually shows me the lightning bolt though in my c# projects.
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Mar 19, 2010
I am trying to make key shortcuts (e.g.: control + c = copy) in my program, but it seems to work in everything BUT the webbrowser control. I have keypreview set to TRUE, and have the code "for each control.... addhandler....form1.keydown" (you get the point).
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Mar 18, 2010
I am trying to make key shortcuts (e.g.: control + c = copy) in my program, but it seems to work in everything BUT the webbrowser control. I have keypreview set to TRUE, and have the code "for each control.... addhandler....form1.keydown" (you get the point).
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Nov 13, 2007
I'd like to temporarily disable events for a given control. For example, the SelectionChanged event on a combobox might be used to update a display every time the user changes the combobox... but while I'm filling the combobox with values, I don't want the SelectionChanged event to be firing over and over... I need to disable events while the combobox is being populated. How do I do this?
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May 12, 2012
I have created control arrays in run time with following [code]...
But I don't know how I can have access to events now (especially textchanged)
For example I want when I write number in txtfrom (i+1) write it automatically in txtTo(i)
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Dec 28, 2009
I am adding a button on the form dynamically, and how to add click events for that but
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Feb 23, 2012
My file-upload function used to show it's progress in a ProgressBar, but now that I moved it into a DLL this is no longer possible.[code]...
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Aug 1, 2011
Assuming I have the following repeater.
[Code]...
But this has failed (The event is never raised)..
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May 9, 2012
In my old VB6 programs I use control events like Keydown to activate code. The code is the same for all text controls. However, I am hoping that there is a efficient way of handing this in VB.net. Using VB2010.
Private Sub txtField1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtField1.KeyDown
ButtonState2()
End Sub
Private Sub txtField2_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtField2.KeyDown
[Code].....
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Aug 18, 2010
I have transparent form with a panel on it also set with a transparent background so you can see rite through it
what im trying to do is when you put the mouse over the panel it displays a picture and when the mouse leaves the picture goes away..the problem is that it doesnt detect the mouse when its over the panel. if i make the form background non-transparent it detects it just fine but i need it to work when both the form and panel are transparent
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Feb 25, 2010
I need the directory entry control properties and events.
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Jul 10, 2009
i am making a webbrowser and i have coded over 10,000 lines of code & i am only 11 and self taught .
1) I want to make a popup blocker but my webbrowser is a tab type so it generates the wb controle so how can i get the events of the wb control? because it is not in my form and only is when it's runtime!
2)I want to make my browser as default
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Feb 22, 2010
Using VB 2008 Express.
Attaching code to buttons when they're clicked is easy when they're static buttons on the form; just double click the button on the form designer and add code to the event.
I have a series of buttons that are generated in a control array, so they're generated in a class, and in the form there are no buttons until runtime.
So newbie question with a probably simple answer...how do I enter code for the click event for buttons that aren't there until they're instantiated as a class at runtime?
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