Disable Input During Processing?
Mar 22, 2011
I have a form with several buttons on it.When a button is pressed,it will execute some remoting proxy method on the server. There is some delay in the process before there is a result returned from server .Currently,I tried to disable the button in the _Click event, hoping that a 2nd, 3rd and the following clicks would not be registered.Unfortunately, those input from the mouse clicks were queued by Windows.
So once the _Click event has finished running, it will immediately get executed again due to the earlier clicking.I tried to create a form (Notice) to display some status message, hoping that clicks won't be registered on the button. Despite setting the form to maximize and on top of the caller form, the clicks still get registered.Then I thought of using .ShowDialog(). Unfortunately, it halts the processing until I close the form. So I did something more complicated by passing in the method into Notice form, so that it would execute the _Click method via an address pointer.Unfortunately, after all these coding. The buttons still get registered with the mouse clicks.So now, is there any way to overcome this clicking queue that Windows registered?
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Mar 18, 2011
I just learned some basics of multi threading in VB.net recently as I came across processing a large List of records and inserting them into SQL database one by one.
I have code look like this:
Private Sub btnLoadNow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoadNow.Click
Dim autoLoad1 As New Thread(AddressOf AutoLoad)
autoLoad1.Start()
[CODE]...
Itemlists is a global lists i retrieved from database, everything looks fine to me but when i run this program, I found that the threads are inserting one records 9 times into the database(I have 9 threads in total), which makes me think that maybe i need to specifically assign 1/9 of a list to each thread? Is there another way to do it which doesn't require the splitting of the list, if not , how do i split it then assign?
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Jan 30, 2010
How can i disable the keyboard and mouse input?
Its not working:
Option Strict On
Option Explicit On
Private Declare Function BlockInput Lib "user32" (ByVal fBlock As Boolean) As Long
[Code]......
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Jan 6, 2010
2008 Array Processing and Sequential File Processing
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May 19, 2011
Im a college student and this is my first programming class, i am having extremely diffcult time with arrays and sequential file processing. Im not asking for the whole program, just something to get me started and hints along as i progress with it. Please help me get started on my program, its due in 2 days.
Here are the requirements....
1. The program must input any number of individual�s last and first names using two separate textboxes.
2. The array of names must be sorted by the last name using a bubble sort. You must code the sort.
3. The program must be able to recall the names from the file and add to the existing list of names so that more names can be added to, sorted, and written back to the file in sorted order.
4. Sort in ascending order: A to Z
5. All names must be displayed in a listbox in sorted order when the user wishes to see them.
6. In the listbox the last and first names must be separated by a comma and a space. Example: Smith, Mary
7. The user must be able to search for a name in the array, using the binary search algorithm. You must code the search.
8. Do not use module-level variables. Instead you may choose to use Static.
9. The program must be designed using Visual Basic 2008
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Dec 22, 2011
I am confused what will happen, when I disable a timer. Will it finish the process and then disable or will it immediately disable without completing process? for example
[Code]....
I want to run getMessage from somewhere else, so I need to disable timer during that time to be asured not to override anything and also before timer disable it should complete that function code.
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May 16, 2009
to disable right click and to disable the start button and task bar?
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Jan 15, 2011
I 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]
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Feb 19, 2012
If 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.
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Sep 25, 2010
I 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
[CODE]...
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.
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May 10, 2010
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?
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Jul 29, 2009
On geting input into DataGridViewTextBoxColumn but the column should not accept input of data that is not integer like; 10003, 2.00, 1500.00
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Sep 28, 2011
My 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.
[Code]...
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Feb 8, 2012
At the moment, my project has a method do_job(jobid,userid)
This method take a minute or two, and then redirects to another page. This has been rewritten so that it now runs in the background and redirects to another page whilst the thread which do_job is on continues. - This works fine. In a button_click event in a default.aspx page :
Dim d as New do_job_delegate(AddressOf do_job)
d.BeginInvoke(jobid,userid, New AsyncCallback(AddressOf Callback),d)
Response.redirect("results.aspx")
[Code]....
So what i want to happen is - the longest time that do_job takes is the longest time of the longest job (30 seconds), rather than - 30 seconds x number of jobs = time it takes at the moment.
As i'm already using a delegate to detact the process from the ui, can anyone provide any advice/best practice on how i should rearrange my do_job method so that it can handle concurrent tasks to further boost the overall speed.
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Nov 11, 2009
Is there any way of doing parallel processing in VB.net. Like running a IF-ELSE and CASE in parallel.
For example i'm incrementing a counter in a IF-ELSE statement. And for each count i need to display some thing using a case statement.
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Mar 15, 2011
How can I keep the GUI active for my windows form application if I am processing some data in db and my process is waiting for result ?
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Jun 18, 2012
I want to process MSXML which is generated by Visio 2010, Which Language will be helpful to work with the generated XML,
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Mar 31, 2011
If vb application (windows form app) is calling a store procedure and it takes 5-10 mins to SP to finish and meanwhile the application is (forced to) close,
what will happend at the SQL side?
Will the proc completely run even though the app is not running anymore?
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Mar 18, 2010
I want to run my vb.net 2003 application from command line and accepting only one parameter(argument)....... BUT it should run without GUI, only a function from my code would get run in background..
[Code]....
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Jun 26, 2010
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].....
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Nov 3, 2011
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
[Code]...
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
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Mar 16, 2009
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)
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Feb 3, 2012
Does we have a good & full image processing function in vb.net? If not. what is best reference for image processing in vb.net?
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Oct 18, 2011
I am looking for a solution to implement Credit Card processing to a POS system I have written. I have been coding VB for about 7 years but never had a need to process credit cards.
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May 25, 2009
I haven't seen a related thread (yet)I have a VB windows application that uses a datagrid to display a text column and a checkbox column. Only one row in the display can have a checkbox entry = true. If a checkbox is selected, the app is to search the rows and all other checkbox entries are to be set to false.My event handler is: Private Sub dgMember_CellContentClick(ByVal sender As System.Object, ByVal e As ystem.Windows.Forms.DataGridViewCellEventArgs) Handles dgMember.CellValueChangedI first had to have this handler code check a flag and exit if true (when initializing the display) because it was called for each row during initialization.
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Dec 1, 2010
i have 10 checkboxes...i want a short way to check if checkbox1.checked=true and check box3.checked=true.... blah blah blah and so on to do codes...i was using long typeing code like:
if checkbox1.checked=true and checkbox2.checked=false and checkbox3.checked=true and checkbox4.checked=true and checkbox5.checked=true and checkbox1.checked=true.....etc then
msgbox"done"
end if
[code]....
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Apr 7, 2010
i am using vb.net to program and process some files.I pick files from one folder process them and once i process them successfully i should store them in a different folder. when i do fi.move(destination folder) i get an error message saying "THIS FILE IS USED BY ANOTHER PROCESS" below is my code
[Code]...
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Dec 17, 2009
I'm thinking of making use of online technology to do some validation and processing for my program but I'm unsure of its feasibility. I need to create a program whereby the client can retrieve the data/settings from website say http:[url].... .Another example would be allowing the program to run until end of December by making use of online time service to check the date so that user can't change any settings from their computer.
While discussing about retrieving the data either through html static site or webservices, another thing I'm concern is transmitting the data from client side to my side.I wonder what is the best and free way to do that? As I'm thinking of using a free smtp gmail to transmit data but I'm worried about the security issue as credentials would be stored inside the program and also firewall might block data from sending out. Another choice would be sending a POST request, but I do not have any server or is there any free server that allows user to post some small bytes of data?
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Feb 15, 2012
Here's the content of text file:
0022005138450000425081959 091
003200513845161223180000001Doppel-Pack, WET "Warming" & "Original" 0000001499
003200513845161048400000001Handschellen-Set, "Fetish Fantasy" 0000000999
003200513845161214340000001Strap-on, "His Vibrating S(extension)" 0000003999
[code]....
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Dec 5, 2010
I am sort of stuck on this what I want to do is when you click a button it process's a command in cmd in the background(I dont want a CMD window to appear) and then if the cmd command has finished it shows a message box like
Msgbox("Command Successful")
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