I am using a datagridview as an input device. When I call an error checker for the input, I want to set the focus on the cell where the error was found but cannot find a command to do this such as:
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I have a usb instrument and a driver who's printed output dumps a data string to the computer I need to be able to read this string into vba The driver manual provides the content of the string but no info on how to access the data.
View 1 RepliesIs it possible to use a datgridview as an input device and then transfer the input to variables (one or two dimensional). I am creating a programme that can be used for a widely divergent number if inputs and the grid would be easier for the user rather than me creating a lot of text boxes at design time which may not be required much of the time and a datagridview would probably be preferable.
View 1 RepliesI'm trying to develop an application to capture the input buffer to identify a device's input commands to build a user control that uses this commands for further use.I'm actually developing a project that simulates Guitar Hero, and I want it to recognise the Guitar Hero Controller's input.I know there are already several controls that work with the guitar hero controller. The thing is i MUST develop this control myself.
What i've done so far only recognises input from the keyboard using Console.OpenStandardInput() . The thing is, as the class name says, it reads input from the Console... not from all sources possible, such as mouse, and other peripherals (joystick, and as i need it, Guitar Hero Controller)
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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.
View 7 Replieshow can i make my program feel if any device or usb device plugged into the computer or unplugged.url...
View 3 RepliesA Problem in accessing a device from VB Windows cannot load the device driver for this hardware because there is a duplicate device already running in the system. (Code 42) This error is because i am using 2 devices of the same company which has the mass usb storage on it and when i install one of the device the other hides. So one is detected the Other is not. It also give a error called designed dragnonacally something...
View 2 RepliesI need some help with the input validation of my application. Attached is the code that I have written as well as a screenshot of the front end. I specifically need input validation to verify that the user selected input for cbLengthOfStay is a number between 1-10 as well as input validation to verify the user input for txtMedication, txtSurgicalCharges, txtLabFees and txtRehabilitation is a positive numerical number. Please feel free to critique my attached code. [Code]
View 2 RepliesIf my Category and Forum selection is incorrect I am sorry and feel free to move it. I'd like to have the users input in the message box that will show. For example: There is a textbox and the user puts in their name as Bob. Then the message box would be: What my main goal is, is being able to include the users input they type inside the textbox inside the message box.
View 6 RepliesI have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")
Else
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I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.
I am writing a calculator app in VB Express 2008. I'm trying to get the app to accept numeric and operator input while ignoring all the alpha input. In other words taking input from the numeric keypad and the top of the keyboard and ignoring all the letters.
Here's the block of code I have so far:
Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
If (e.KeyCode >= Keys.D0 OrElse e.KeyCode >= Keys.NumPad0) And (e.KeyCode <= Keys.D9 OrElse e.KeyCode <= Keys.NumPad9) Then
Select Case e.KeyCode
[code]....
I can't get vb to recognize the above code it seems to skip right over it. BTW, is 'Keys.Crsel' the same as the caret '^' symbol?
On geting input into DataGridViewTextBoxColumn but the column should not accept input of data that is not integer like; 10003, 2.00, 1500.00
View 3 RepliesMy objective is to, instead of entering in the data manually into the text boxes, I want to read in a textfile. The Calculate button will contain the code to read in the file and assign it to the appropriate textboxes. Save the separate file in the \bin\Debug folder.
The text file just needs to have 3 integers on 3 separate lines.The code I posted works without and errors, but.I am having some trouble integrating the Stream Reader.
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i wish to apply an input-mask or a format on an input box so it can check if the input data is an email or not.the inputmask/ format would be as folowing &&&&&&&&&&&& "@" &&&&&&&& ".com ".That is in Access but how to do it on VB.net and an input mask. Here is a part of the code which I use
Dim x As String = InputBox("please enter new E-mail" + vbNewLine + "eg.(username@domain.com)", "Change Email", My.Settings.Email)
If x <> "" Then[code].....
Option Strict On Public Class Form1 Private Sub btnDistance_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDistance.Click 'The btnEnterSpeed click event accepts and displays up to ten speeds from the user'and then calculates and displays average speed
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I cannot figure out how to incorporate the number of days into the input box then get it to loop and count the number of times the User inputs in the number of days. Then I have to incorporate it into the equation to get the total distance D = MPH * Hours. What I have right now wil not count up the number of days and locks up after I input one number and will not add anything to the listbox. Because I also have to make sure that they cant add nonnumaric values and the number of hours per day cannot exceed 20. I have put things in and taken them out but it has been 2 days and I am lost now
how to input a data/value to excel through vb input form and get the data/value from excel back to the input form?? (For example: put a number into exel A1 from input form and get another number from ecel B1 bact to the input form)
View 1 RepliesPart of my assignment is to check if input to Group Number and Number of Units are correct input by making error handling exceptions...
I have to check the following:
a) group number is neither 501 nor 062
b) number of units are NOT numbers
c) number of units is NOT a positive number
So my first question is, am I checking correctly? 2nd question is, How do I make sure my Exceptions will pertain to their correct respective things (a, b, and c.. above)?
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I've been working on some code to add together input from an input box to make a string and display it in a message box. I've put the code in a loop so that it will add all input into the string until nothing is entered in the input box.
Dim stringInput As String
Dim message As String
Do Until stringInput = String.Empty
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All I get is just the last input entered to show up in the message box and none of the previous entries. How do I get all the input to be added together and show up in the message box?
i use visual basic 6 i already try making a button to play sounds. by clicking the button and the sound will out. so that i want to know were could i start, when you input words in textbox the program will speak what you have type in the textbox.
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I can get the LAN Device Names (using code below) but how do you get those strings from the "Name" column (see image) that the user can change?
' get list of enabled lan card device names
Dim cat As New PerformanceCounterCategory("Network Interface")
Dim instances As String() = cat.GetInstanceNames()
For Each instance As String In instances
Debug.WriteLine(instance)
Next
I am using VB.NET. How can I run device via USB? I mean device, such as lamp by USB.
View 1 RepliesI`m working on a project where i have connected a FPGA chip to the PCI bus but now i am trying to figure out how to communicate in VB to that device? Normally the device has memory assigned to it in XP (address h00000200 to h0000037F) but i don`t know how to read/Write to that memory directly in VB...
View 2 RepliesHow do you retrive a given device IRQ in VB.Net? I can find no examples of this anywhere.
View 4 RepliesI need to detect a usb device when it is connected to PC.I found next code that is working. But it works only with Mass Storage.Imports System.Management
Public Class Form1
Private WithEvents m_MediaConnectWatcher As ManagementEventWatcher
Public USBDriveName As String
[code].....
Device : USB Scanner
Application : A
Application : B
Let's say there are two applications are running, which are A and B, on windows XP and they all have only one simple form with a text box to receive a data from the scanner. Is it possible to read a number by the scanner and write the number for those two text box on A and B at the same time?
How would a person test to see if a usb device is on? I have a program with a usb reader attached to it and would like to throw an exception if it is not on.
View 2 RepliesI am trying to write a 'simple' program with vs 2005 that recognises my specific usb memory stick so that I can make windows log off or 'lock' when the device is not in any slot. I have found some ready code and I am trying to modify it for my needs. There compiling works but when it doesnt find any of the usb ports.It works by checking each port if it is a usb port and then compares the vendor and produck ID to the given. it seems simple enough but I cant get it to find the USB.
Here is the code:
I'm trying to access a device with modbus in VB or C#. I've been searching all over for a simple way to do it. I know that It would be connecting through a TCP Connection, and I know the address of the device. I need to read the input on it (whether of not it's on), and to toggle the relay on it as well.
View 3 RepliesI have spent couple of days searching the Internet for some hints, but I haven't succeeded. I need to enumerate all removeable USB storage devices and search for a file. It's important to say, I am looking for a device, which has no drive letter assigned - e.g. Garmin GPS etc.. how to enumerate the devices, indentify storage one and/or access its files?
View 2 RepliesI have spent couple of days searching the Internet for some hints, but I haven't succeeded.I need to enumerate all removeable USB storage devices and search for a file. It's important to say, I am looking for a device, which has no drive letter assigned - e.g. Garmin GPS etc..
View 2 Replies