This code should get one random line from sample.txt and put it in Label1 - problem is that it's only getting line 2. Every single time.
Dim ioLine As String ' Going to hold one line at a time
Dim ioLines As String ' Going to hold whole file
Dim ioFile As New StreamReader("sample.txt")
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I have the following code which extracts the contactcode from a table in a database;
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Code: lblUniqueID.Value() = (RandomPassword.Generate(4, 6)) Now, I want to compare the contactcode values extracted from the database and the value stored in lblUniqueID.Value(). If the random password is similar to one of the contactcode then generate another RandomPassword IF NOT then place the value to another label called lbltransfer.text.
I'll insert that value to the database.. The idea is extract all the contactcodes(these are the random passwords already generated and stored) from the database. Compare with the new generated password if it exists then create another one if not then store it in a label called lbltransfer.text.
I'm Trying to make a piece of software where You enter a number and the computer measures the length of the number, and then generates random numbers to match the human number. It will then count the number of guesses and the time taken. However it always comes up that there was a infinite loop "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll". I have searched up how to do this and I can't seem to find out how. I think I just put my wording wrong when looking it up. My Software Has Has 2 TextBox, 2 Buttons, 6 labels (4 just to make it user friendly) and a timer.
Here is the Code:
Public Class Form1
Dim TimeTaken As Integer
Dim GuessesTaken As Integer
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I'm supposed to make an app where computer generates a random number using a function and then the user has to guess the number. If they get it right, they see a picture.... If they get it wrong the loop keeps going until ten guesses are up.. I'm running into quite a few problems...
1. I don't know how to tell if the photo will show up if the number is right because right now I have it set to false in the form, so it dosen't show up but in my loop I included the code that SHOULD allow it to show up if both numbers are the same.... Not sure if this is correct...
2. I have a textbox that is supposed to keep track of the number of guesses but the message automatically becomes Game Over and the guesses go up to 11 as soon as I click the Are You Right Button?
3. When I try to debug, my app freezes and I don't know why...
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I got a little program that generates a random line of text from a .txt file and all is working well, at least for the most part.
On occasion I get an error message popup saying "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: Index."
Here's my code:
CODE:
The last bit is where the random number is generated, which I am guessing where the problem itself is, but am unsure as to how to fix it...
I am trying to write a random number function that can just be called from my main module to generate different random numbers. I have tried this several different ways and I am having odd results. Approximately 19 times out of 20 the numbers come back exactly the same, but approximately 1 in 20 they come back as two different numbers. Im using Visual Basic Studio 2008. Here is the code I have so far, or rather, the current version of my many tests I have been running to try and figure it out. Sometimes it takes many runs of the program before the two seperate numbers apear.I've been researching it and have come up with nothing so far.I know I could put them in the module section as two different randoms and it works, but I get extra points if i use a couple classes in my program.This is the main module.
Module Module1
Sub Main()
Dim randomNumOne As New RandNum[code]...........
How can I make a command button, When clicked, Generate 4 random digit numbers? such as 5545 or 7492, Any random 4 digits.
View 13 RepliesI've created code that generates a random number and validates the users guess to see if its correct. I think the code is good but i'm not 100% sure. I need to add additional pieces to the code and i'm not sure where or how to do it. allow the user 10 guesses. after 10 guesses disable the ability to make more guesses if the 10th guess is wrong count each guess entered & display the count as it increments display each guess along with its returned messaeg into a list box. when the user gets correct answer provide a box to allow them to play again. Re-initialize variables back to their starting status.
a. If the user correctly guesses the number in less than 5 guesses display "Either you know the secret or you got lucky!" in a message box. b. If the user correctly guesses the number in 5, 6, or 7 guesses, display "Ah Ha! Do you know the secret?" in a message box. c. If the number of guesses is 8 to 10, then display "Try to do better next time." d. If the number of guesses exceeds 10, then display "You have taken too many guesses."
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I'm trying to make an application where when the user clicks a button, it generates a series of 100 random numbers between 1 and 1000, and then saves those numbers in a text file. All I could come up with is generating ONE random number, but I can't figure out how to make it 100. Here is what I have:
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Making a program that generates random numbers for a "Lottery" (really for homework). Four different types of games and must show up on the GUI when click generate. My question is do you have to have different dim randomObject As New Random() for every Sub to produce different numbers? Every single type of game has different range of number. The Sub needs to return the results back as a string. If I request the method each time will I get a different number back from the range? Here is what I have but just so lost.
Public Class LotteryNumberGenerator
Dim randomObject As New Random()
Private Sub genButton_Click(ByVal sender As System.Object, ByVal e As
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I am making a program which generates a random number between 1 and 10 and when 7 appears it is suppose to tell you how many tries it took to get the number 7 and then end the application. This is the code I have used:
CODE:
This code only generates the number 7 and exits the application, each time i click the random button but i want it to show the other number it randomizes too for example 1 2 3 4 .. etc, if u dont understand, please try it, but im trying to say, when i clikc random it just says number 7 (does randomizing in background) and tells you how much tries it took but i want it to show the other number it randomized also and when 7 appears, then exit the program
I have a rather large DBML file and recently discovered that Visual Studio's MSLinqToSQLGenerator is generating different output than:
SqlMetal.exe All.dbml /code:All.designer.vb /namespace:LINQ2FSE /pluralize /provider:SQL2005
It seems to have dropped an arbitrary (and I think relatively small) set of associations from the generated VB code. But SQLMetal works fine. Shouldn't the output be the same?
After further research, I find that the difference seems to be associations on entities that involve properties that are also used on other associations on the same entity with a different number of columns. For example:
Entity A has columns id and name
Entity B has columns id, name and fkA (foreign key to A)
Entity C has columns id, name, fkA and fkB (nullable fkB)
Entity C has association C_A, which links fkA to A.id
it also has association C_B, which links fkA and fkB to B.fkA and B.id The code for properties supporting C_B will not be generated by Visual Studio, but will be generated by SqlMetal.exe.Is this kind of association allowed? Is there a reason the code is being generated differently?
I need to bound the license keys to one hardware of the customer's computers.Now I get the CPU Id (but is not unique id) and already some business only bought 1 license and install the app + 1 computer with the same CPU Id.There is any part of the hardware that generates unique ID? The motherboard? [code]
View 6 RepliesByRef vs ByVal generates errors!?I had a method that used an Object Function Foo(ByRef bar as CustomObject) as Boolean this method generated errors, because some strange .NET Runtime things changed the bar object, causing its Dispose()al.A lot of time spent to understand the thing(where the ... object is changed), until somebody replaced ByRef by ByVal and object wasn't change anymore when passing to this method.As in my case the function Foo does NOT modify the bar, shouldn't ByRef or ByVal have the same effect?[code]
View 4 RepliesI have three checkboxes on my datagridview namely, Yes, No, Inv. If the value is set to True in the table which populates the datagridview the respective checkbox is checked and if false unchecked.Now, when on runtime I try to check a checkbox on the Yes Column I receive the followinf error;
DataGridView Default Error Dialog
The following exception occurred in the DataGridView:
System.FormatException: is not valid value for Boolean. -->System.Formatexception: String was not recognised as a valid Boolean.
at System.Boolean.Prase(String value)
at system.componentModel.BooleanConverter.ConvertFrom(ITpeDescriptorContext context. CultureInfo culture, Object value).........
The No and Inv allow me to check and uncheck the checkboxes as many as I want without generating the error.
I have 2 dgv's on a form that are both alike and even use the same datasource, just one column is different betwenn the two.I manually added the columns and set the datasource and bindings. When I make a change to the properties in one of my dgv's it keeps auto generating the columns I do not need.
View 2 RepliesI am using Visual Basic.NET 2008. I was earlier a VB 6 developer. I found a (VB 6) code online which generates gradient colours on a form. It has a small sub (routine) which does the trick. If we pass red, green and blue values then form's backcolour changes and it appears like a gradient.Now that code is not working in VB.NET.i mean is there an easier way to generate gradient colours in VB.NET (2008)convert the code I have into .net specific so form's backcolour becomes gradient.I have attached a zip file which contains the code.
View 11 RepliesI am trying to pass a LIKE parameter to a SELECT statement but receive an that strSearch is an invalid field name error:
Private Sub Search()
Dim strSearch As String
strSearch = txtSearch.Text & "%"
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I've read numerous posts and threads about random number generation, but I havent' run across this.If I generate a bunch of random numbers, the results are radically different if I create a new Random generator for each number than if I use on Random generator for all the numbers. The results are much more consistent and evenly distributed if I use the same Random generator.I would have thought the opposite,because creating a new Random generator each time should reduce the number of random repetitions, if a different time slice is used to create the random number.[code]......
View 9 RepliesI'm trying to populate class properties where one property is a list collection. I get a NullReferenceException when trying to add to the list collection. The code (litlle bit simplified) is here:
Public Class Portfolio
Property Name As String
Property Assets As List(Of Asset)
Public Sub Populate(ByVal data As DataTable)
For Each row As DataRow In data.Rows
[Code] .....
I have a nested class "Asset" inside the class "Portfolio". Everything goes ok until the line
Me.Assets.Add(asset)
Which gives me the NullReferenceException error.
i suppose to develop a s/w.. which automatically generates a timetable for the entire college.. on all possible classes..
View 5 Replieshow do i go about creating an id column in a form using sql database which generates numbers automatically?
View 2 Repliesi want piece of code which generates a unique extension for my windows application and that should be opened by my application only. when i click submit button it should save all the details i have entered and should save them as a file of my application type only
View 2 RepliesHow can i make a program that generates a combination of letters,starting from user-specified to the end of the user-specification. here is an example of what i mean:
aaa
aab
aac
aad
aae
and so on...
How can i make this?
I'm planning to create a vb.net program that generates mysql codes.Is is possible that after the program has generated the code, it will copy it in to the clipboard immediately?
View 3 RepliesI have 3 forms 1 -mainform which loads when program is open, and where you select the datafile you want to use and input default information in about 20 textboxes 2 butons 1 to each page 2 -has 3 comboboxes and about 20 textboxes worth of information pulled from the database. then 20 textboxes the user can enter values to compare against the default values coming from form1. and 20 boxes that have calculation results 2 buttons one to each page 3 -same as form2
I created a textbox font format function in form 3
When I load program and click button for form3 everything works fine, i can then click button to take me to form2 and vice versa back and forth no problem
When I load program and click button to form2 I get a date casting error from the function on form 3
Why would I even get this if i havent shown form3 yet??
generating a catalog number for a library system?It is one of the requirement of the panel in my thesis, though its not fits correctly but atleaast, there is suggestion given in a generated catalog.
View 3 RepliesI am trying to send an email from my program, but am getting an error.The error is: "Mailbox unavailable. The server response was: 5.7.1 Unable to relay"The puzzling thing is that I only get this error with addresses not on our local LAN. This code generates the error:
Private Sub btnSendMail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSendMail.Click
Dim Message As String = "This is a test message to validate the email transmission
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The class Random is out right defective. It always produces the same random numbers in the same sequence. Things I have tried so far is every kind of seed you can think of as well as Randomize. The result is that I always get the same random numbers in exactly the same sequence.
View 4 RepliesI am practicing using the drawing commands, and have gotten a grass background and black happy face that moves around the background.It's a 10x10 grid of 50 pixels.I want (at the moment, when i press enter) it to generate a random number of trees (15 ~ 25) at random locations on the background. The program doesn't freak out about anything, and the variables seem to be right (using stop commands) but it's not drawing anything. Here is the code for the "GenerateTrees" command I have for when I press enter.
Private Sub GenerateTrees()
NumberOfTrees = Int(Rnd() * 10) + 15
For i = 0 To NumberOfTrees - 1
bmap.MakeTransparent(Color.Fuchsia)
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