How can I set up an application wide event trap that is triggered when my database connection status changes?i.e. no matter what form the user may be on if the connection is terminated for whatever reason a message box is displayed to the client requesting whether the program should try and reconnect with the database or not.
View 9 RepliesCurrently I am able to see if a key is currently pressed via the GetAsyncKeyState function. Currently I just simply have a timer running in the background that constantly checks if a certain key is pressed in order to run a command. However my issue is if the user holds down the key it will continually run that bit of code over and over per timer tick. Is there a way or another function to detect a keyup or keypress only. This is my current code to detect keys:
Public Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Windows.Forms.Keys) As Integer Public ReadOnly Property CurrKey(ByVal key As Windows.Forms.Keys) As Boolean
Get Return CBool(GetAsyncKeyState(key))
End Get
End Property
I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.
[Code]...
I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.I have the following code:
public sub NavigateIE
dim ieobj as shdocvw.internetexplorer
ieob.navigate ("Some URL")
end sub
[code]....
How can I link the DocumentComplete event of ieobj to the subroutine named customeventforieobj?
I am using VS 2008. I have a listview control whitch 'checkboxes' property enabled.My question is: how can I trap a MouseMove event over an item only, excluding the associated checkbox?I have the following code in MouseMove event of the ListView control but it cannot differentiate between an 'item' and a 'checkbox:
Private Sub mylstview_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles mylstview.MouseMove
Dim oListViewItem As ListViewItem[code]....
I'm trying to force an always maximize setting
View 1 RepliesIn Vb.net 2005 how can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.
View 1 RepliesHow can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.
View 6 RepliesI am developing an application that has multiple forms and I wanted to know the best method to have application wide methods and functions. Currently I am using a Module with all my methods that are needed to be used across the entire application in it. However, I read at one point that modules should not be used, as they are only there to preserve backwards compatibility with older VB code. Is there a better way to have methods able to be called anywhere?
View 1 Repliesi need to store Application wide Settings in my Application like:
Connection to DB (Servername) Username/Password Registrar/Serial etc. I think there are basically two Options:
Store them in the Registry Store them in an Application Settings File Using one of the methods above is no problem, but under Windows 7 my Application running in normal user mode allows me only to store user specific data. For example inside UserAppDataRegistry, UserAppDataPath etc.
But when i want to use e.g. CommonAppDataRegistry to write my Data in, then i get no access to it, due to missing privileges.
Now my question:
Where and how to store Application Wide Data? How are others doing this? When i purchase an application and install it on my pc, it asks me for Uusername and Serial. When i insert it then it saves it somewhere without asking me for Administrative Privileges or something else.
I have a license form that i wish to save the information or just system wide information for that matter,I know about the my.Settings - however this will only save for a specific user and the aplpication scope you can not write to.Where is the best place or the normal practice of saving application wide information?
View 7 RepliesIs it possible to write a Gloable or application wide error handler, how?
DanielI'm new to .Net, OPP and this forum but love it!
Is there Any way to handle the crtl + Alt + Del Key combination. Take for instance in a quiz application (Win Forms ), the user should not be able to switch to other windows till the test is over.
I'm able to capture the ctrl and alt key strokes individually, using c# standard properties. but once they user hits the del key . The control goes out of my appliation and windows handles it.
I found some threads talking about this.. but when I follow the thread on where to do it.. it must be talking VS2005.. cause on vs2008 in project properties -> application tab-> I dont see View Application Events button. so I assume its moved in VS2008 ? I did find some code I guess to do the same thing.. but I wanted to make sure I do it correct.. since I have an app that a client is running and they keep getting framework exceptions and I have no clue where its coming from.
View 18 RepliesI have a lot of HD images within my program design and it is causing the screen to flicker when loading other forms. It is kind of
slow too. Is there a way to resolve this, for example, using a reference or component such as DirectDraw. Here are my computer
specifications:
Intel Pentium 4 /2.53GHZ
1.5 GB RAM
512 MB ATI Radeon HD 2400 PRO AGP Video card
19 IN. LCD Widescreen 1440x900 resolution monitor.
could it be the refresh rate of only 60HZ?
Has anyone used a system wide hotkey and notice it no longer works? But the program is still running fine. When I run my program and it starts the hotkey, sometimes it will work fine all day, other times within 15 minutes I press the keys and the program does not react to it. I am using the keys Control-F2. Here is my
Public Sub SetHotkey()
Try
Select Case ComboBox2.SelectedIndex
[code]....
How do I stop the new data row/cell value from being deleted if an error occurs. I am using the DATAERROR event to trap the error as shown below:
Private Sub RoomPricingDGV_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles RoomPricingDGV.DataError
e.Cancel = False
If e.ColumnIndex = 1 Or e.ColumnIndex = 2 Then
MsgBox("Invalid Date. Please Re-enter! ", MsgBoxStyle.Critical, "Room Pricing")
RoomPricingDGV.Columns(e.ColumnIndex).Selected = True
End If
e.ThrowException = False
End Sub
What I want to happen is to go to the cell automatically where the error has occurred and get the user to change it, not have to retype the whole data row or move back to the previous cell. When using the MSHFLEXGRID in VB6, it was fairly staightforward to do.
So I have no idea...ive looked around and can't find anything on error traping when a person doens't enter anything. Here is my code as is now...I trap for if the number goes above 36. now I just need to trap the whitespace
[Code]...
I'm trying to complete this airline reservation application, but having a problem in this part of the question:Creat an event handler for the FlightBindingSource's PositionChanged event: select FlightBindingSource in the class Name combobox then select position changed in method name combobox to creat the FlightBindingSource's PositionChanged event handler. Write a code to access the currently displayed flight object and pass its flightNumber to method DisplayPassengers as a decimal.This Is my code so far:
HTML
Public Class AirlineReservationForm
Private database As New ReservationsDataClassesDataContext()
Private Sub FillAll()[code].....
In times past, most people coded on a terminal that was 80 characters wide. In many languages this has become, if not holy then close to it. But now many people have 20"+ monitors (or dual monitors), so screen real estate isn't as prime as it once was.
So my question is this: in Visual Basic code, should code be limited to 80 characters, should there be no limit, or is it really a subjective thing, dependent on where you work and your own preferences?
how can i capture system wide selectedtext?
i've managed so far to get a global mousehook + i'm hoping to capture the selectedtext from anywhere system wide when the user left clicks.
i tried using the keybd_event api to send CTRL+C to copy any selectedtext to the clipboard but it has unexpected effects + seems to run before the text i've just selected becomes selected.
here's the code i'm using:
Public Class Form1
Private Declare Function keybd_event Lib "user32" Alias "keybd_event" _
(ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, _
[Code].....
I'm trying to open a tool window as a child and although I can set the width to something like 50px wide in the ide, when it opens up its 125px wide. What is there to opening a widow with out much width am I missing.I have turned off the maximize and minimize gadgets and even the whole drag bar. When they open up when I run they are fat again. Looking for something like the tool window in paint.net.
View 1 RepliesI am after some GDI+ help, Basically I have an LED display which for example is 300 LEDs wide by 300 LED's deep, so you could say it has a resolution of 300x300.I am intending to use windows to process images ready to be sent to the display (as the display is dumb and simply displays what it is sent, But I require that the images are animated as well as static sort of like the basic PowerPoint animations (scroll on/off etc).to achieve this I need to write some code that creates frames much like gif's. So to scroll a 300x300 image onto the display I would need 300 separate frames.
So I have written the following code that uses the GDI+ objects to build the frames needed to scroll an image from the right or left.
[Code]...
I'm looking for a windows "special folder" where user data can be stored and changed PC wide, not only per user.Up to now I've picked the so called COMMONAPPDATAFOLDER, but that doesn't work with a setup project, because the files copied there on installation (like a config file) are not changeable in Vista with a program used by a restricted user (probably because the Windows Installer performs with admin credencials).
View 2 RepliesHow would I register F7 as a System Wide Hotkey?This is my timer code
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
SendKeys.Send(Keys.Space)
End Sub
When I start the timer, and open notepad, this is what i get
I have a series of GridViews in a Tab Panel - databound to a generic List of Business Objects.
The columns in the Gridview are all similar to the following:
<asp:TemplateField HeaderText="Company" SortExpression="Company.ShortName">
<ItemTemplate>
<asp:Label ID="lblCompany" runat="server" Text='<%# Bind("Company.ShortName")
[Code].....
I've been looking at using PROPERTIES [URL] but frankly I don't understand it that well. Before I invest the time to read, understand, and truly comprehend this, I want to make sure it's the best way. My intended goal is to create my database connection string in a function/sub somewhere, then assign it to this project wide string variable, then I can use it in any form, project wide without having to recreate it.
[Code]...
I have a dropdown list box that displays data from my database. Problem is that some records are quite long so the width of the dropdown box extends past the side of my screen. I have a reasonible width set but it is not stopping the dropdown box from getting as wide as it needs to display each record. How can I set a fixed width on this?
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
DataSourceID="SqlDataSource1Usage" DataTextField="data_text"
DataValueField="ID" Width="280px">
</asp:DropDownList>her
I would like to get a list of the VB.net/C# "wide" functions for unicode - i.e. AscW, ChrW, MessageBoxW, etc.
View 3 RepliesI want to make a user control (name MultiSelect), which I will use for choosing items from huge list. For example I want to choose customers to make a view of their turnovers, so I will creat a new MultiSelect control which will contain a textbox (i canwrite starting letters) and a treeview (will list customers matching the first letters chosen in textbox).
View 7 Replies