I need to develop a simple radio message logging app for use on a small military exercise.Now, the app is quite simple in itself, it needs to let me easily submit a new message report simply containing "from", "to", "message", "category" (and timedate, etc). Now the problem is that I have no experience with programming anything up against a database. I know basic SQL but I just dont know how to work with databases programatically. What kind of local SQL database solution works best with vb.net and Visual studio? Maybe I should use an Access database instead?When I click submit (on a new message report) how can I make an entry in a local SQL database of some sort? How can I load up a list of the message log entries already made in a listview or something?
I'd like to write a simple Windows form that will make it easy to record a voice message before uploading it to a remote web server and sending the URL to the recipient(s):
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Currently, the user has to use Sound Record to record the message, use an FTP client to upload it to a web server, and finally, use an e-mail client to send the URL. I'd like to combine those three features into one.
Using visual studio (Winforms) with sql server (R2). If you can login by inserting the correct values in the textfields (vb.net) that is connected in the database . How do i code the log out?
trying to write a simple form for calculating professor's salaries depending on their degree and position.my problem is that the when i select a check box, the value is not being updated until i select a different radio button. it probably doesn't make much sense here,
Public Class frmMain Private Sub optLecturer_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles optLecturer.CheckedChanged[code]....
the values being assigned to my salary label are correct, but are not being updated until i select a new radio button. im not entirely sure how to get around this so that the value is updated as soon as i select the check box.here's when the program looks like:
I am communicating with a USB-HID device. It will successfully complete hundreds of send-receive requests but occasionally get a Null Exception error.
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at the rxData.dataPacket(i) = element I will get a NullReference error every now and then. I could enclose it in a try/catch statement, but I'd like to fix the root problem if possible.This device is communicating to microcontrollers, and it is possible that they won't always give a value... but my feeling is this is some sort of UI threading issue. When debugging, even though there is a null exception, many times there actually does seem to be data in dataReceived.data.ToList(). Is there an easy way to place the whole data processing routine on a thread separate from the UI?Edit: Changed code to match answer and give more info on where it is used. Still get NullReferenceExceptions after about 1,000 completed send/receive requests to the HID device.
I have always wondered about this and seen this among lots of programmers. Why is a VB programmer or VB code easily dismissed as too noobish and easy while the same does not apply to Python or Python code? After all, isn't Python as easy as VB is? And it does provide drag-n-drop GUI application building also. So why is it that VB is flamed and yet Python is not?
I've been trying to play with DirectShow but it's getting on top of me and my question on here didn't answered so I'm thinking maybe I should go with a different approach. (DirectShow VB.net can't change recording format). <- Where as that 'works' I can't get it in the format I want it, and I don't really understand it so I'd obviousl like to go down the route of something I can get my head around.
I've googled till my fingers are raw trying to come up with an easy way to record video in my vb.net application, it doesn't have to be fancy, just a preview with a start record, stop record button, that's it.
iam very keen to learn vb.net 2008 so please suggest me how to access world most and best free of cost reading material available on net for reference.and free best book available for vb.net 2008 on the net. there is any complete source code available for consideration.
Lets say I have 30 text fields in a Frame on my form, and I want to set them all to disable (so users can't edit them).Is there an easy way to walk through those fields without having to create an array of text fields?
I.E., in ... VB 6, with an array of text fields, I can do something like this: For i = 0 to 10 txtfield(x).enabled = true. Next i
Is there something in VB.NET where I won't have to use an array of controls, something like this (assuming all txt fields are in a frame):
I'm running stored procedure from asp.net front-end but it's quite long. What is the easy way on running that thing in the background? I mean if I close the browser, I still want my stored procedure to complete not just die. Also, I would like to perform other actions on the front-end while my procedure is running.
Dim energybar As New Rectangle(9, 154, energy, 21)That is my new rectangle, now when I draw it e.Graphics.FillRectangle(Brushes.Blue, energybar)It says there is no width but the integer energy is = to 100...now, how do I fix this? It but be somewhat simple.
I have been using what I think is a simplistic and easy way of reading and writing to/from the registry but whenever I look at code I keep seeing links to DLL's and constant decorations and lines and lines of code.[code]
I saw another forum which discussed how to detect whether a LAN was connected, but I need to know whether my Internet connection from my ISP is up or not (I'm writing a program for day trading, so knowing if my internet connection is down is critical). I know I can simply open a browser in VB and browse to a site and see if it doesn't come back "page not found", but that involves a fair amount of overhead, and if the internet is down, it often takes many seconds to a minute to come back with "page not found". Is there some simple command that will quickly tell me that my internet connection is working? I'm using VB in VS 2008, and currently using XP although I plan to convert to Windows 7 in the next couple months.
I want to have a one second pause after some code has run. During that pause, if a certain key is pressed, I want to do some action. Otherwise, I want the code to continue as normal. What would I use to replace the comments in the following code?
myTestCode() ' Wait one second and see if a given key was pressed. ' If specific key is pressed, then show messagebox (or whatever) asking user if we should cancel (whatever) NextMethodToRun()
Yes, I know there are a number of ways, which is why I am looking for something that is fast and simple to use. I do not want a console window, some other form, etc. to appear. Just want to check if a key was pressed. The key (if pressed) should be pulled off the keyboard buffer.
After we finished make a project , we need to make setup file right ? is the setup file contain all the component we use in our vb.net ? like Crystal Report component
My app currently uses Interop.ADODB.dll to retrieve data from an access database.My compiled setup file has to include a Interop.ADODB.dll file for the software to work.What would i have to do in order to convert my app to drop the interop file by using Ado.net instead?Would it simply be a matter of changing the references and connection strings or does it involve alot more than that?
I am brand new to VB2008 from VB6.I am trying to connect to my remote mySQL db and simply display a record into a label.Here's what I have on Form Load.[code]
i have problem that i know once someone answers, i will kick myself, but here goes. i need to move the text next to the radio button to the left of the radio button, that part is easy just make sure the the "right to left" is maked yes, got it. but, the problem is i am making a seating chart and the seats are labeled 10-a, 10-b etc.... when the right to left is set to yes my text reverses and becomes a-10 and i can't seem to figure out what is set in the properties the is causing the alpha to be placed before the numeric.
I have founfd numerous ones on the net, but they all only do these complicated RegEx for zip codes, html, address, credit card numbers, etc etc,All I want to accomplish is when the user searches for "commend", they get only every occurence of the word "commend". NOT commendeth, or commends, or some other variation.[code]
I have an error while using a collection that has been stumping me for years.I wrote a class to allow users to write equations in a txt file using RPN (stack based notation).The class runs through a select statement while reading the equation and then ends up with a final number as the answer. I have a collection to place these objects in for easy reference. For whatever reason I get random object reference not set to an instance of an object errors when there is nothing in the program that would remove objects from the collection, kill objects, or change the collection in any way. It is possible for one thread to call the calculate function while another thread calls the CurrentValue property. I'm not sure if this could be causing the error, but once it happens I get an error every time the program enters that code until I run out of memory.
I'm trying to find a simple and easy encryption/decryption method for strings. The strings will contain spaces, special characters, numbers, and letters. I just need to be able to encrypt/decrypt them.
I have a VB.NET web app that is about 2000 lines of code, contains about 20 different subroutines, and about 50 different functions.Is there an easy way to "rewrite" this to take advantage of classes and objects?
I have a variable defined as follows:Dim iRows As List(Of String())I've also been converting that to a list of lists just to make it easier to work with.Dim iRows As List(Of IList(Of String))I would like to bind that list to a GridView using the contents of the nested array/list to dynamically define the columns. I don't know ahead of time how many columns there will be, but I do know that they are all the same throughout the list.
