I am attempting to keep user inputs into our application as clean as possible. One way I am attempting to do this is not allowing incorrect data type in fields (not allowing alpha characters when expecting numeric values)I found and implemented the following code:
Private Sub txtSocial_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtSocial.KeyPress
Dim UserKeyPress As Char = e.KeyChar
Dim isKey As Boolean = e.KeyChar.IsDigit(UserKeyPress)
code that creates a program where a user can key in 3 coordinate points and when the click "Generate Triangle" button. the program automatically creates the program.
How can I add a user to a table in a mysql database without datagridview? I already have this: Code: Dim conn As MySqlConnection 'connect to DB conn = New MySqlConnection() conn.ConnectionString = "server=localhost; user id=root; password=test; database=test_addtable" [Code] .....
I've create a VB2008 app that upon clicking the applications Start button it creates an icon in the taskbar that is visible to the user upon creation, it also shows a balloon tip at the time of creation. This all works great when the program starts but once the balloon tip timeout value has elaped, the icon, in Windows 7, disappears from the visible portion of the taskbar and becomes hidden, which is only visible if the user shows the hidden icons.
My question is this...... In the VB2008 program is there any way to set the behavior of the icon so that it remains visible on the taskbar instead of allowing the icon to become hidden?
The original design of the program was to get an environmental variable, display the value of that variable in the balloontip, hide the form and then check every 10 minutes for a change in that environmental variable. Once the form was hidden the user could see that the program was running by the presence of the icon in the taskbar and if they hovered over the icon it would display the current value of the external variable. Also if the user wanted to return the form to it's full size all they had to do was click on the taskbar icon. With Windows 7 if I hide the form and the icon is not visible in the taskbar because it too is also hiddem this may create a problem for the user as they may not even be aware that Windows 7 hides the icon. So....Is there anyway to insure that the icon remains in the Windows 7 taskbar or is this a case where I need to re-evaluate my program design?
Dim Principal As New System.Security.Principal.WindowsPrinipal(New ystem.Security.Principal.WindowsIdentity(My.User.Name))I'm using My.User.Name in the example. I'm aware the My.User namespace has a IsInRole method, however, I well need to check a list of users and not just the current user so can't just use that or WindowsIdentity.GetCurrent. This exception is being thrown when declaring the Principal variable:"There are currently no logon servers available to service the logon request"
I have text box in my program where I need the user to enter at least six characters. They also need to include at least one alphabetic and one numeric character.My idea is to create a loop that uses the IndexOf string manipulation to check each character. I'm familiar with the IsNumeric method .
Ok I am making an RPG that is checking for collisions whenever the user is walking...Basically i made an array of points in which the user is not allowed to access and if they do try to access them it will not walk...
Public Class cityshop2010 Dim abletomove As Boolean = True Dim moveto As Point Dim badpoints(1) As Point
[code]....
with that code there I want to be able to say badpoints(0-50) or badpoints (0 to 50) whatever... or even badpoints(*) for any badpoint....How do i make it check all the badpoints?
-User Opens program -User goes to settings.(Settings has a bunch of RadioButtons) -User Customizes settings, checks certain buttons. (How would I pop up a msg when the user clicks "Ok" with out checking something? -When "Ok" is pressed, it will "save" -When settings is opened again, the same RadioButtons will be checked.
Right now, if I exit the settings form, and open it again, the radio buttons are cleared
I am currently trying to develop a chat application which will work on a LAN, however encountering problems with with adding a user through the registration form, always getting the result :: "Datatype mismatch in criteria expression" I've tried checking and cross-checking the datatypes used in both the database(its a .mdb database,, created in Microsoft Access)this is the code i am using:
dim con as new oledbconnection dim cmd as new oledbcommand Public Sub UserReg()
[code]....
everything is done,, such as opening the connection and defining teh data reader, etc as you can see from teh code(which was derived from another question but i made edits to suit my use for it)I also have problems with checking wether a user is online. obviously i will be referring to the table to do that using something like
cmd = new oledbdatacommand("SELECT * FROM Users where isOnline = "Yes") dim sdr as oledbdatareader = cmd.execute reader
whence it will show a list of all the currently "Online users" but i do not how how to quite refer to it?
I want a way to be able to control all the keypresses on a given form. I tried overriding a WndProc of a form to achieve this but I noticed that my text box keypresses are not going to that wndproc. Whats the way to achieve this?
I am currently creating a Space Invaders game. Basically what I want to do is being able to move and shoot at the same time. The problem is that whenever one button is pressed to execute an action it cancels out any other button being pressed. I don't want that to happen. Currently I am just using Key down. How I can have multiple key presses at once?
Private Sub frmain_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown Dim Loc As Point Select Case e.KeyCode Case Keys.Left [Code] .....
That's my code. This is basically the last thing i need done in my project.
How can you simulate keypresses and releases? I know you can essentially hit a key with Sendkeys.SendWait, but how can your code press and hold q, for example? I essentially wish to be able to call something like press("q") and release("q"). The effect would be the same as physically holding them down.
I've started building a small game where you move around a PictureBox control with keystrokes using the arrow keys. Everything was working fine....until I added a button.
Now the button steals the focus so that every time I hit an arrow key hoping to move my image, it just selects the button.
Is there any way to make the button selectable only by mouse click?
I've been looking around for a way to accomplish this to no luck, but is it possible to have a series of keypresses (Like Ctrl + Shift + O) or something like that act as an event? I'm trying to find a way to make something like this show a form using the old Me.Show() code.
I have the following code to handle keypresses on the form:
Private Sub Form1_KeyDown(ByVal sender As Object, _ ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown Debug.WriteLine(e.KeyCode)
[Code].....
The first time I press any of the arrow keys the code is not executed and a NumericUpDown(NUD) on the form gets the focus. The rest of the times the arrow keys are pressed everything is fine, until I click on a button. Then the problem repeats, focus NUD, then fine.
I'm making a mario-like clone and I just finished the jumping code. The only problem is that moving while jumping is extremely hard because if you hold down the up key and right key at the same time, neither one activates.
The user has to enter the text in the textbox , to write a text user need to press the keys and release the keys. Write a code to count the number of keypresses and keyreleases and display the value in the labels.
im trying to make vb.net translate input from an external device into keypresses. when bit = 1 i want the key down, when bit = 0 i want it up unfortunately with sendkeys it just sends the same keystroke over and over again. ive googled for days without finding a good answer.
I have a ListView with Checkboxes in vb.net and what I want to do is when the user check the checkbox, the program ignore the response of the user in checking the checkbox, instead it leaves the checkbox uncheck.
i already finish this module but while doing 2nd module i notice that my 1st module doesnt work anymore, then i checked my code, i double click the control at design time and thats it instead it brings me to my actual code of that control, it brings me to another event, like this, this is where my original codes are placed:
Code: Private Sub lblSupplier_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) End Sub then, after the poblem occurs, the control created another event like this: Code:Private Sub lblSupplier_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) End Sub notice the difference, they are the same click event but the other one has an "_1" at the end of click.
1. Write a Visual Basic Console Application which creates two DateTime objects. One DateTime object should be used to store a value for date purchased. The second DateTime object should be used to store a value for date paid. See below for more information.2. Assign values to the two DateTime objects. See page 197 in your Doke & Williams book for help with this step.3. Use the toString method to display the two DateTime objects. See page 197 in your Doke & Williams book for help with this step.4. Compare the two dates to determine which date occurred first.
