Im Building a auction application and i need to catch the exceptions i.e if two people press the bid button at the same time i need to capture that exception and figure out who was has the highest bidder out of the pair of them then show the relevant message, my question is how can i achieve the above?
View 2 Repliesi want to make the Grid view Button(Time In) invisible until the User press Time Out Button. Once the user press the Time Out Button,Time in Button must be shown
View 2 Replies[code] Everytime i press the Calculate Button, it crashes on my first calculation part. What im trying to do is to not crash the program eventhough i have no input in it.
View 1 RepliesI need to write a piece of code that will decide weather the charactor of pressed key sould be entered to the textbox or not.
I've experimented on events:
KeyPress()KeyDown()PreviewKeyDOwn()
But non of them helped me to acheive my goal. is there any other events that i shoudl be aware of?
I have a code which registers keypresses even if it's running in the background.Is there a way I can capture the keypresses, but prevent the keypress from going to any other app? Microsoft Word and my program is running.if I press to 'Activate' button the program starts capturing all keypresses. This makes it impossible to type into Word, or any program for that matter as long as my program is activated.Once my prgram is deactivated I can type in any program normally.
View 11 Repliesim validating textboxes in my form so it will not allow users to press numbers just letters.the code i'm using is Private Sub Textbox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) _ Handles txtFirstName.KeyPress, txtSurname.KeyPress, txtAddress2.KeyPress, txtCity.KeyPress
[Code]...
what i need help with is, ive created a lable called lblFn next to the FirstName Textbox and would like this to be updated with "Please enter Characters Not digits" if a user enters digits in the textbox, how do i amend the above code to get this working?Basically whatever textbox a user enters wrong data in it updates the corressponding label next to it!
Using 2 forms how would I click one button, from another form? ie In VB 4,5,6, I would used to do it as:-
Form 1:
private sub Command1_Click()
msgbox "Say Hello"
End Sub[code].....
If I clicked the button in form2, it would automaticlly, click the button in form1. Do I, do it the same way in VB Express or has it changed?
I want to make a extractor/installer for example the users will press Install and it will extract myprogram.exe at C:/windows/system32/ automatically when they press install.
View 7 RepliesI am trying to find a way to capture keyboard events with the intent of preventing users from being able to hit Ctrl + Alt + Del while my application is running. I've spent several hours poking around looking for inspiration but only finding unclear and half-baked examples. As such, I was thrilled to stumble across the article: Managing Low-Level Keyboard Hooks in VB .NET written by Paul Kimmel [URL] This article is insightful, comprehensive, well-written, and I thought it was a huge help. One little problem though, the code that was provided did not work, (I knew it was too good to be true!).
Now, Mr. Kimmel seemed very knowledgable and I think that he probably tested his code, so quite likely the problem is something that I'm doing wrong seeing as I am a newbie. As the article suggests I cut and pasted his code into a module in my project (solution I guess is the proper term), and I call the HookKeyboard method from a button on a form, and Presto! Nothing happens. Stepping through this code I see that the second line in HookKeyboard:
[Code]...
So I currently have the following:
2 timers
2 labels
1st label is "Clock" this pulls the time from the users current time zone/local time
2nd label is "UTCClock" Which would be UTC time
Now I have this for the first label: clock.Text = Format(TimeOfDay, "hh:mm:ss tt")
Which would give the users current time zone/local time. As for the UTC.. how would I add in for the UTC time from where the user is located at? I did some searches.. but couldnt find what I was looking for.. IM pretty sure its not as easy as getting the users current time zone/local time.. So im assuming that Theres a "bit more" code into getting UTC time..
Is there an easy way for me to capture some system data when I except? Particular memory information. I have a service that has been running fine for years, but lately it keeps having System.OutOfMemory exceptions being thrown at random. I want to determine what memory the system is actually using then if possible to see if I am really out of memory.
View 4 RepliesThe port connection is successful but when it gets to receive data I get this timeout exception. Got no idea what to do...what to fix
System.TimeoutException: The operation has timed out.
at System.IO.Ports.SerialStream.Read(Byte[] array, Int32 offset, Int32 count, Int32 timeout)
[code].....
I have a few questions:
1. how do I make a button press a certain button in another application? (i.e - for example it goes to application "iexplorer" and press insert, home, a, b, or other button in the keyboard)
2. How do I make a virtual keyboard (for example a button opens form 2 or 3 and when you click on a button in the keyboard it goes to a certain text box in form 1)?
I am wanting to increment an integer by 1 each time i press a key. My problem is this, when i press the key, the integer is increased by a lot, unless i just 'tap' the key very precisely.
Is there a way to 'reduce' the sensitivity of pressing a key?
My system needs to capture the daily clock -in and clock out time of each worker. Each worker is only allowed to clock-in and out once a day. Im using visual studio 2008 currently and my database is using microsoft access. Below is that i used for my login.
[Code]...
i want to capture the system logoff time and i have to store the time in .txt file. when ever the user logging in and logging off i have to capture the time and store the time in .txt file.i konw how to use windows services.but how to capture the log off time and log on time?
View 7 RepliesI need to capture what keys the user presses and put it in a textbox. However, I need to capture multiple combination. For instance, if the user presses (and briefly holds) SHIFT and 1 (number one) the text box should say "SHIFT + 1." I also want "real time" capturing, meaning as the user presses the keys the value changes.
View 3 RepliesI have a form with a panel on it that is attached to 3 buttons that when pressed display a different image.How do I make the panel cycle through the images on pressing the "Z" key for example?
Public Class Master
Private Sub Master_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I would like to display the Visual Studio 2010 build date and time on the 'About' box/pop, changing the following from current date time to only the build time. frmAbout.Label_CurrentDayAndTime.Text = DateTime.Now.ToString()
View 5 RepliesIf Users LogIn, I want to cath the time, in what time it start to login...
View 2 RepliesIs there something like an ftp server that supports multiple users to login?What i mean is that i need something like an ftp server where can login and upload a file at the same time that other 20 users do.(using vb.net code)
'Upload a file to an ftp server
Dim FTP As Net.FtpWebRequest = CType(Net.FtpWebRequest.Create("ftp:myserver.com/file.txt), Net.FtpWebRequest)
FTP.Credentials = New System.Net.NetworkCredential("Username", "Password")
FTP.Method = System.Net.WebRequestMethods.Ftp.UploadFile
[Code]...
I Have A App That i made all i wish to do is hit enter and it will press buttoI under stand that i could maybe just submit the data that is in the text box but i don't wish to do so. i just want to set up keys so i don't need to point and click.
View 2 RepliesI did the code that makes btnstart to start timer... code:
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
If Timer1.Enabled = False Then
[Code]....
now i am trying to make f12 press the "btnstart"... how do i do that? i read a lot of dreamincode.net vb.net
I have 2 buttons on my form. Button 1 and button 2. When Alt+A is pressed (when you hold alt and press A), I want button1.performclick. when F2 is pressed (the one above number 2), I want button2.perform click. how to do this?
View 1 RepliesI am new to Visual Basic.NET and I am just playing around with it. I have a book that tells me how to read from a file but not how to write to the file with a button click. All I have is a button and a textbox named fullNameBox. When I click the button it gives me an unhandled exception error.[code]...
View 2 RepliesI'm making a mini-web browser and i would make a code wich allows to press the "enter" touch of the keyboard instead of the button.[code]...
View 9 RepliesI am developing Client/Server application in Visual Basic 2005 with back-end SQL Server 2005 Database.I have lot a users to access to this application.I have a problem with accessing same record by two users on different machines at the same time.For example: Two user fetches the same record display on the machine.Now both have same data on the machine. The first user modified and saved the record and after some times another saved the data without modified or modifed some other columns. Now the last user who modifed the record contains the old data.
View 5 RepliesI'm making a speed game in VB.Net (Console Application) and users have a certain time to press a certain key. So how can I give the Console.ReadKey function a timeout without just waiting until a key was pressed?
View 2 RepliesBasically, I have developed one form which is generic and display different views. On that form I have used Close button. Alphabet E is short-cut for closing the form (i.e. mnemonic functionality).During execution of the form, when I press "E" on that form, my form closes automatically. As per my understanding mnemonic works with Alt control only. I am not sure if I am missing any properties that should be set so that this problem is resolved.
View 1 RepliesI have recorded this macro that attaches to a process (nunit.exe) for me. Now I'd like to press a button (named "Run") on the window of the process I am attaching to, but how? I have recorded this macro:
Sub DebugNUnit()
DTE.ExecuteCommand("Tools.ExternalCommand6")
'need a short delay for nunit process to appear in process list:
Threading.Thread.Sleep(200)
[Code]...
I am using nunit 2.5.7 and for attaching and debugging to work you need to attach to the nunit agent and press run on the nunit gui, for more recent versions of nunit you can attach to the nunit gui.the above script enables nunit debugging from the Visual Studio IDE with just visual Studio and the nunit binaries. all you need to do is set up nunit as an external tool (with the current project as a parameter), create a custom toolbar, and add a button to that toolbar that uses the above script. this will start nunit, attach to it, start running the tests, and break at your breakpoint.
one more thing: in the nunit gui disable "Save Visual state of each Project" in Tools -> Settings -> Tree Display or the nunit gui will remember the last run test, which is a pain if that's not the one you wanted to debug.