Mathematics - Increases The Variable "userScore" By 1?
Jan 15, 2009
This is a mathematics "testing" program, after every correct answer it increases the variable "userScore" by 1. This works perfectly along with the rest of the program, the only problem is that even when the answer the user inputs is WRONG and a message telling them they have got it wrong appears it STILL increments the "userScore" variable by 1..
Public Class frmMultiplication
'declare correctanswer as a variable which can be seen by the whole program
Dim Correctanswer As Integer[code].....
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Dec 29, 2010
i need a program that give n dot and take a Function for example:
give (x1,y1) and (x2,y2) take me it Function(for F(x)= ax+b)
give (x1,y1) , (x2,y2) and (x3,y3)take me if Function(for F(x)= x ^ 2+bx+c)
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Feb 22, 2012
I have a form based application that works without issue at 100% (Windows 7), but one increases it to 125%, everything goes awry. Now, I know to set the form AutoScaleMode to DPI, which alleviates some of the issues, but some controls are cut off because of the form size.I know I can set 'AutoSize = True' on the form as well, but this gives unintended results and doesn't allow the user to resize the form as needed.What is the best way to handle DPI increases? Should I get the user's DPI and manually draw all the controls based on their DPI setting?
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Jun 23, 2011
in .NET, when I add two SqlDecimals, like so:
[Code]...
then s3 has precision 2, whereas both s1 and s2 have precision 1. This seems odd, especially as the documentation states that the return value of the addition operator is "A new SqlDecimal structure whose Value property contains the sum." I.e. according to the documentation, addition should not change the precision.
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Sep 13, 2010
I have a simple question that most could probably answer. I have a button that when it is clicked it transfers information from that form to a microsoft word doc. Now what I want to do is everytime that button is clicked it creates a number that is displayed on the word doc. So this is how it would go:
first click- it would show a number 1 on the invoice.
second click- it would show a number 2 on the invoice.
This would continue as long as the program is used.
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Sep 6, 2011
I need a tutorial for Visual Basic 2010 or 2008 where I can learn how to make a program increases or decreases the size...
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Aug 12, 2011
Ok i have a progress bar that increases when a download starts to finish. The once its compleate the next part of the script starts.
After all the script has finished, around 30 seconds. It starts the full process again but atm it wont start again as the progressbar is still complete.
I have tryed adding
ProgressBar1.Value = 0
To the end of the script to set its value back befor the script starts again but that dont work either :/
How would i get the progress bar to go back to its orginal state so that it can start all over again.
VB CODE
Dim Gimagepath As String
Gimagepath = System.IO.Directory.GetCurrentDirectory() + "udimage.jpg"
Dim Gimage As String
[Code].....
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Nov 25, 2010
I'm trying to fix a problem that is just killing my program's efficiency. When I run it, it starts out at maybe 10M of RAM, but it gradually increases. Within 20 minutes, it can get up to 700M of RAM. Now, when the program is restarted, all of this goes away and starts anew, but restarting the program every so often is a very loose solution. Here's what my program does: there's an array in which many (anywhere from 500-4000 or so) links are placed. I have a webbrowser that navigates to each of these and does an action on them, then moves to the next page. For example: [Code]
And all of the actions work perfectly, but the memory exponentially increases, resulting in a crash if left on for too long. I've searched Google and all I've found is that that's not the actual usage, and that if you just minimize it and maximize it again it will go down, but it did not when I tried it. Why is the memory increasing so much like that, and is there any way to fix it?
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Aug 26, 2010
I check the memory usage of my project from task manager, It always increases when I open forms but doesnt decrease when I close them. So the memory usage is getting bigger and bigger...
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Apr 3, 2012
I recently made a change to the code within a loop in my code, and now when I run the code through Visual Studio 2010 Express, the loop runs about 10x slower than the previous loop.I did not make any significant changes (to my knowledge) to the code within the loop.I made the change so that the loop could handle various conditions I imposed in another section of the code.I know that it is this loop that is slowing everything down because I report the loop progress on my form.[code]I feel like my changed code should run better, but it doesn't.I know that my code is not written very efficiently (and feel free to comment on ways to improve it), but my main concern is the significant increase in computation time that resulted from my changes.The loop above is the main block of code within the Sub, which is run via a thread.In my tests, it is the only thread running at that time.Everything works, and the computation yields the correct result, but takes 10x longer than previously. Additionally, the number of iterations does not increase.So the new code isn't iterating excessively, it is simply taking much longer to compute within each iteration.
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Dec 22, 2009
I am currently working a piece of code which needs to send an attachment in the
email it generates. The attachment is a PDF document. Due to requirements I am
unable to save the PDF and send it, so I have had to create a memory stream attachment.
The issue I have with this is that the file size is _500KB. However save the file on my machine and it is around 370KB.
This increase in file size is unacceptable. has anyone come across this issue before? If so how have they got round the problem.
Below is the section of code.
Dim memStream As System.IO.MemoryStream = Nothing
'assign number to the PDF name
Dim filename As String = req.GetAccountNumber()
[Code]....
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Mar 18, 2009
I have created a page containing the Wizard control. It's a very simple one. User selects some data on the first page, clicks Next and then has a choice of Previous or Finish. When they click Finish the form is submitted but, for some reason, the font size of all my labels increases. There's nothing in the code of the Finish button that would do that.
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Jul 4, 2009
the goal i want to accomplish is when the user presses a button, "moneyamount" increases by a random number generated. the problem i am having is that after the action is finished the script does not seem to save the new value and always starts at zero. here is the script:
Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles dojob1button.Click
Dim moneyamount As Integer = moneyamount + Int(Rnd() * 10)
moneylabel.Text = "$" & moneyamount
End Sub
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Mar 25, 2010
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
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Aug 23, 2011
I receive the error -
[Code]...
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May 18, 2012
Public Class Form1
Dim x, c, number(0 To 19) As Integer
Dim s As Integer
[CODE]...
The variables in the brackets [example] do not actually have brackets in them in the original code. These are where the issues are. For both variables, it says, "The type for variable [variable] will not be inferred because it is bound to a field in an enclosing scope. Either change the name of [variable], or use the fully qualified name (for example, 'Me.[variable]' or 'MyBase.[variable]')." Now, I'm not entirely sure if this is a stupid question or not, as I'm used to VB '98 because that's what we use in my programming class at High School. let me know why this won't work.
-Note: The intention of this program is to continually loop the generation of numbers for this list until I tell it to stop. Button1 ends the program, Button2 generates the list one time only, Button3 is supposed to loop the generation of the list, and Button4 is supposed to end the loop, but not the program.
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Jan 10, 2011
Say that i have the following code that parse about 20k records from the DB.
Code #1
vb.net While reader.Read()
list.Add(If(Integer.TryParse(reader(0).ToString, 0), Integer.Parse(reader(0).ToString), 0))
End While
And then another code which does the very same thing but it seems to be a little cleaner.
Code #2
vb.net While reader.Read()
Dim storeowner As Integer = 0
Integer.TryParse(reader(0).ToString, storeowner)
list.Add(storeowner)
End While
This is what i am confused about; does the compiler creates a new variable automatically when i use the if statement without strictly declared variable? What approach is better in sense of performance?
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Aug 24, 2009
I am looking for a good resource on variable naming conventions to illustrate variable type and where variables are declared. So I will have public variables, Private variables, private or local variables. I also may want to declare variables with the same name in different class code (i.e. in the code behind different forms). I am assuming good coding would dicatate a prefix for declaration location.
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Mar 28, 2011
i have this error in the line of with xl.active......Object variable or With block variable not set.
Dim xl As Object
xl = CreateObject("Excel.Application")
With xl.ActiveSheet.QueryTables.Add(Connection:= _
"TEXT;C:Documents and SettingsUserDesktop429MEDICA2.TXT", _ Destination:=xl.Range("$A$1"))
[code]....
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May 31, 2012
Now I have the need to get a current value from a bindingsource in a property of a user control.In a previous thread I had tracked down the "Object variable or With block variable not set" to the return in the Get block of a property. At the time I was only using the Set so I just commented out the offending code until I needed it.
[Code]...
The error does not occur during a system compile, only upon saving the container object of the user control. As I said the Set works correctly, only the Get causes the error.I would like to know what I am missing/misunderstanding and am open to other suggestions of handling retrieving the current value of a bindingsource in a user control.
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Sep 5, 2010
Using Visual Basic 2008 Express. I need to pass a variable to another form. Or else make the variable visible to both forms.
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May 14, 2010
I am using vb2008.net express,I test vs2005term it work, can any tell me what is the input variable and output variable of this terminal?how to catch the input and output variable to a textbox1 for sending and a textbox2 for receiving when I press send button? is that possible?
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Sep 17, 2011
I have the following code that I am using to parse out a test file. I am getting variable conversion error in Sub Main() when I assign file = Read(). The return value of Read() is a TextFieldParser type. How do I assign the proper variable type to "file" so I can write the output to a text file?
Function Read()
Using MyReader As New FileIO.TextFieldParser("C:UsersColinDesktopParse_Me.txt")
Dim currentRow As String
[Code].....
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Mar 19, 2009
I have the following code but I get blue squiggly line in cnn and when i point my mouse pointer on it i see this message "Variable 'cnn' hides a variable in an enclosing block"
Private Sub BtnLockUnlock_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnLockUnlock.Click
Dim IsLocked As Boolean = FpSpread1.ActiveSheet.DefaultStyle.Locked
[code].....
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Feb 1, 2012
I have the following code passing a dataView variable to a function and I am getting the following warning:"Variable 'cl' is passed by reference before it has been assigned a value. A null reference exception could result at runtime."
Function Editclass()
Dim cl As DataView
Bindclass (SqlConnection2, cl)
[code].....
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Sep 26, 2011
i had a class called Tag with a structure like:
public class Tag
private _members
public properties
public shared database_methods
end class
this class was tailored for mysql database. i'm currently adding access 2007 support so i split tag into tag and tagdata with structures like:
[Code]...
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Apr 25, 2012
I'm having trouble tracking down what is wrong and causing the above error. This only occurs when saving the design view in VS 2012. The code builds and runs fine.Full error text:Code generation for property 'CompanyValue' failed. Error was: 'Property accessor 'CompanyValue' on object 'ContactViewUC1' threw the following exception: 'Object variable or With block variable not set."
CompanyValue definition in ContactViewUC:
Public Property CompanyValue
Get
[code].....
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Jul 24, 2008
Been getting this error with my program. Using framework 2.0
[Code]...
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Jan 21, 2010
I'm trying to enter automatically todays date in a number of records in the Table 'Applications' into the field 'Date_refund_request'.
However it is giving me the error 'object variable or withblock variable not set' in the line "Set rs = db.OpenRecordset(strSQL, dbOpenDynaset)".
The code is as follows:
Private Sub Command16_Click()
On Error GoTo Err_Command16_Click
Dim db As DAO.Database
[Code].....
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May 6, 2009
I am trying to use this block of code to save attachemnts from Outlook into a folder on my harddrive.
VB
Imports Microsoft.Office.Interop
''' <summary>
[code].....
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