The purpose of my application is to keep track of users waiting to use another application that may only be accessed by one user at a time.My vb.net application adds the persons name to the end of a text file, removes names when a person either gets to the front of the line or exits by closing my app.It regularly checks the list, and when the user gets to the front of the list, it notifies him and loads that other program.My problem is, I don't want the user to have to sit staring at my app until they get to the front of the line.I want the app to cause the computer to emit a regular, slightly annoying beep,even if the user has minimized my app or pulled up Microsoft Word on top of it, and continue to beep repeatedly until the user switches back to my app and presses a key or clicks the mouse.
I need a coding to execute multiple at commands simultaneously. when first command execute and get the response from the port and then the second command will be executed. how to write the coding. it is possible. i am using siemens gsm modem.
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when i execute this coding i can't get the correct result because the port response will take some times.how can i identify the time delay. when i use thread.sleep(300) means this is also not correct for my solution. Because the port response will take more than 300 milliseconds?
I have a DataGridview. The user has to pick an option in the datagridview. I am contemplating either putting a context menu in the DGV. I am assuming that I will fire my context menu on the Cell Enter event. However prior to that I need to draw the users attention to the column of interest.
I know I can hide all other columns but his is not userful as they need to be visible. I am also assuming that I can highlight the column in the form load event. Or I could use some sort of Call Out box in the form load event that draws the user to the column. Can you create a call out box from a context menu?
how can i call a VB function - deleteevent() in usercontrol.ascx.vb from a javascript function in clickhandler(e) in usercontrol.ascx. The call should cause a postback because I need the usercontrol to display the changes.I am currently trying to do it by using a linkbutton with style display:none, and calling its click event from the javascript function. But i dunno how to call the click event.
However, I get an error in the call to BeginInvoke (the UpdateApplicationDataUI portion of the delegate is stating "Expression does not produce a value").
Me.Dispatcher.BeginInvoke(Function() New Action(AddressOf UpdateApplicationDataUI))
I'm using VB10. Can someone explain why you would use user events instead of just calling a sub or function? Isn't user events the same thing a sub's or function's?
I have a panel2 inside a split container that has several user controls loaded into it. Panel 1 has an exit button and I want to call one of the sub routines that is in one of the user controls loaded into Panel2.
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click Dim dialogMessage As DialogResult Dim a As New ucTimeTracker[code]......
This line is giving me trouble "ucTimeTracker.autoWriteFileOnExit()"
I am getting (reference to non-shared member requires an object reference).Basically I want the exit button on frmMain. SplitContainer. Panel1 to call autoWriteFileOnExit() on the user control named ucTimeTracker that is loaded into splitContainer.Panel2
i'm trying to learn about user controls. I created a user control that has a textbox and a button. What i'd like to be able to do is when i click the button in the user control, populate a label in the aspx page. I understand that i could just have a button on the page that uses some properties on the user control to get that information.. but i'd like to know how to do it with the button the user control.. the reason for this is the button is just an example.. a learning tool. if i can get this working, i'd likely be putting thing in the user control that might require this kind of passing information. Anyway.. i've found some c# examples that i tried to get working as vb.. but once started getting into the delegates and events..
I'm working on a small project that will take Screen shot in several modes, the big problem that I'm facing currently is that I don't know how to capture the user keys will my application is minimized or when it's not the active window, i must do so if i want to let the user capture anything without having my application hiding the object (window) he want to its screen shot.
I am building a application in VB 2010 Express, that tracks sales leads, I have everything working except 1 last item. I want the users to be able to select a different background image to match their industry. I have all the images embedded, but can't figure out how to allow the user to select.
Preference is to have a separate form for the user to cheese on launch, but I am OK with it just being a dropdown in the lower left corner of the app.
how can i call a VB function - deleteevent() in usercontrol.ascx.vb from a javascript function in clickhandler(e) in usercontrol.ascx. The call should cause a postback because i need the usercontrol to display the changes. i am currently trying to do it by using a linkbutton with style display:none, and calling its click event from the javascript function. But i dunno how to call the click event.
control which will need to be reused in several forms in my program. It basically consists of several buttons in a panel. To start with, what I need to do is get the button values from the control into a text box on the first form. But I don't want to have a method calling the textbox directly from within the control, because then it won't be reusable in my other forms. Is there something I can do in VB like parentform.textbox.append for example, where you can generically call the methods of the form in which the control appears?
How could i make it so the user can change the background on a form like he/she can choice from a list of backgrounds or add there own image as a background? also how could i make it so a button or a drop down button launches a form in the project itself?
I may be doing this wrong but I want to call a sub when the user presses enter on a textbox. The sub then shows a window in dialog mode. When I close that window, the computer makes a ding sound. Why is that? Is there a better way for detecting enter being presses on a textbox and not getting that ding?
I am already familliar with applying an image to a form background. My application has many in it, but I want to give the user the option of browsing for an image of their own to apply to a form. I don't intend to save the images as defaults or anything. Just the option to browse and apply to a form.
How can i change the background image during runtime? so far, i have an openfiledialog that grabs the location of the .png or .bmp file and then i have this below it[code]...
How can i fix the error that i get "Type system.string cannot be converted to type system.drawing.image"
I am attempting to write a simple 11ball style game. It requires images of poolballs overlapping each other. Since the balls will need some internal intelligence I was hoping to create them as usercontrols.I am having trouble gettiing the control's background to be transparent.Setting the background color to (Web) transparent only makes the background clone the form background color.
i'm currently wonder how to let the users change the font size via a combo box(I have it set up for Small,Medium and Large) That should be fairly easy. The next is more complex. I want users to be able to browse for an image and use it as the background image of the program.
I'm trying to change the background color of a node that is being hovered over while the user is dragging items from a list box.I've gotten both functions to work separately, but while the user is dragging, the NodeMouseHover event does not fire. Is there a way to do both?
vb Private Sub trvNavigation_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles trvNavigation.DragEnter If Me.CanMove(e) Then e.Effect = DragDropEffects.Copy
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Note: CanMove() is a function I made that verifies the dragged data. Nothing else. And I will change "Color.Blue" to a system color later.
I am working on a windows form project and having some problem with UserControl Double Buffering.I created a usercontrol and has a background image, then on top of it I have few radio buttons and labels. Radio buttons and labels are all having transparent background as color.However, when I show and hide the User control, I can see the flickering on those labels and radio buttons that has transparent background.And I tried
Me.SetStyle(ControlStyles.DoubleBuffer _ Or ControlStyles.AllPaintingInWmPaint _ Or ControlStyles.UserPaint _
I have a lengthy XML file that I want to search based on text that a user types in. Because it's lengthy, I want to wait for the user to stop typing for 250ms or so before I actually start searching in the background. I tried to kick off my Task, having it sleep for 250ms, then check if my CancelTokenSource had canceled because another character was typed. I'm not seeing a cancellation, though, so I end up seeing my results flash several times as the queued up search tasks complete, one after the other, after I finish typing.
I am working on a windows form project and having some problem with UserControl Double Buffering.I created a usercontrol and has a background image, then on top of it I have few radio buttons and labels. Radio buttons and labels are all having transparent background as color.However, when I show and hide the User control, I can see the flickering on those labels and radio buttons that has transparent background.
I believe there wont be any diff if user clicks the button on the form and the click event is fired OR if we call the button click event / function in the code. Because in one my project, this does make diff. If I click the button on the form, the App works great but same button if I click it thru the form code, the whole process crashes. This happens in Vista / VB.net.
I'm building a UserControl which will be used by other developers.
If I build the UserControl for "AnyCPU" will there be any problems if another developer uses my UC in an application which he builds for x86.
I mean if the complete application is running on a 32 bit machine then all should be OK but if the app is running on a 64bit machine then the x86 app will run on wow64 but where does my UC run ? In native 64bit or does it default to the same as the parent ?
Or do I have to make x86 and x64 versions of my UC ?
I have a question of VB event handler and color picker. Now I have a label, and I want when user click it, it pops up a color picker dialog and let user to change the background color of the label. Not sure how to implement this, can anyone give me a direction?
I want the background of my form to be the same color as the window frame color that the user selects, even if that changes. I selected System->WindowFrame as my background color, but it always remains a dark grey, regardless of what I have my window color set to. How else would I achieve what I want? I assumed I was doing it the correct way. Do I actually need code that gets the system window color and then apply it?
I am using query from a SQLite database as the AutocompleteCustomSource for a ComboBox. Also, I want to load data in separate thread. My LoadData method works fine when called directly, but it fails when it is called from the BackgroundWorker thread. When it is called from the background thread, it throws a Specified cast is not valid exception on the csearch.AutoCompleteCustomSource.Add(hh("Taj")) line. Below is my code:
Sub LoadData() Dim connetionString As String Dim cnn As SQLiteConnection
