Display String Randomly From Array
Jun 2, 2011
I have a form with one richtextbox and one button. The idea is that:
Form Load: data read from text file into arrayButton Click: random number generated, then used to select the string whose index number matches the random number generated
My StreamReader is working correctly and I can create random numbers with no problem, but I'm stuck on how I can use this random number to extract the corresponding string. I keep get the error saying QuoteObject reference not set to an instance of an object.
My code is below:
Imports System.IO
Public Class Form1
Dim questions(69) As String
Dim i As Integer
[Code] .....
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Oct 30, 2011
how can i display array of string,,, am using below code ,i cant display all data in f and s at same time.,below code shows error,,"Object reference not set to an instance of an object."
[Code].....
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Mar 27, 2009
Basically what i want to do is when a command button is clicked and it has run the code at then end i want a label to display one string out of many at random. How would i declare the various strings and then get it to display one at radnom
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May 19, 2011
I'm trying to configure my program to choose a random entry from an array:
Code:
MsgBox("Participants will now be allocated to each group at random...")
Dim number As Integer
Dim randomnumber As Integer
[Code].....
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Jan 16, 2009
[Code].....
The problem that I am having is that instead of displaying "hello" I want it to add the listbox items to the array.
Can you have it randomly pick a value from an array?
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Jun 15, 2010
I have a class and I am trying to randomly select 3 items to display on a page (each item should be unique so that there is no repeating).I have some code that works(ish). The problem is that when I track the random numbers it takes about at least 50 attempts for the application to select a different random number than the one that was chosen the first time (defying the laws of probability).[code]
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Apr 26, 2010
Right so I have made a graphic of a coin being flipped. Heads is shown on one graphic, tails on the other. I wanna set it up so that when I hit go it will randomly play one of the two graphics on one of my forms.How easy is it to add a .gif file to a form that can play when told to? What is the code im looking for to help with me with what I'm trying to do?
Another thing I plan to achieve is also a random number generator that will display a number on a ball that rolls on to the screen. So the displaying of a number will be timed to show up when the ball comes in focus. I have some code that I have used previously to generate a number, but I wanna get the generated number to show in time with the ball rolling up.What are some wait commands to use in vb .net? This is the code I am using to randomly generate a number.
vb
Dim r As New Random
TextBox1.Text = r.Next(0, 150)
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Apr 14, 2010
I am making an application that randomly generates numbers. I then have to find out if those numbers are even or odd. Then place them in the corresponding array ( EvenNumbers() or OddNumbers() ). Then display the random numbers array then the even and odd numbers array. I am up to the point where I have the generated numbers and can tell if they are even or odd, but can't get them into an array. I am trying to do it like this....
[Code]...
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Nov 25, 2010
I am writing a who wants to be a millionaire console application in VB and need to write the 50/50 bit. I have tried searching for a solution but i couldn't find anything that would solve my problem. The questions and answers are stored in an array and i need to be able to call a random answer from the array.
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Apr 15, 2010
I'm doing a project at the moment for school,I need to randomly pick a number from an array,which I can do but I can only use that number three times,I dont want an answer
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Jan 15, 2010
How long it would take to generate all of the numbers between 1 and X randomly.
X=1,000,000 took 6 seconds, and for 10,000,000 took over a minute.
Does that sound reasonable?
Experiment
stopwatch start
count = 0
do while count < x
select a random number between 1 and X inclusive
have i selected this number before?
no-add 1 to count
yes -
loop
stopwatch stop
display elapsed time
I made the Do Loop UI un-friendly and ran this from the IDE using CTRL-F5. My PC is 1.8Ghz and has 2GB of memory. I am using VB 2008, .Net 3.5 SP1.
Looking for work - Zip 65101 [URL]
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Aug 1, 2011
how to have the code randomly pick a memory location in an Array without having it filled, perferably in VB.NET Thinking of the logic, I was thinking
Dim random As Random
Dim tic(2, 2) As String
random.Next(tic(2,2))
Would putting the array as a parameter would randomly pick a memory location in an array?
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Jan 16, 2010
Ok lets say i have 5 picturebox`s and 5 images, how can i randomly display the images in different pictureboxes each time i click a button ?
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Dec 22, 2011
I have a question about an array of string and random. I have an arry of string i.e Dim testArrayString() As String = {"Orange", "Apple", "London", "Sydney", "anything"} I want to show the each element of the above array randomly one by one in a message box....and also stores that randomly generated string from that array into an another variable... How would i do that... i have no clue
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Sep 30, 2009
Im working on a roguelike console RPG. For those of you that dont know, just google search it.What I need help with is that I have an string array called ArrMap(0 to 19) that holds the 20 rows of each map for display. I also have an array of the same size called VisibleMap that needs to hold which portions of the map are visible and which arent so that when the player switches screens [IE goes from map, to inventory] they can go back to the map and it will look the same. I was thinking of using an array, but if you can think of another way to do it, that's fine.Here are the subs that deal with the map reading and display, so you know how I have things set up at the moment.
Code:
Public Sub ReadMap(ByVal location As String)
Dim ioFile As New StreamReader(location)
Dim ioLine As String
Dim intX As Integer
[code].....
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Dec 21, 2010
I have 22 images and I am trying to add them into an array and then assign them randomly to a button so when the button is pressed it will change to the assigned image. Also is it possible to randomize the array.
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Jan 26, 2009
My program is supposed to display a randomly generated sentence on the screen (something like a screensaver) Then 'wait' for a random period between 1 and 5 minutes before cycling through to generate another sentence. How do I do that?
[Code]...
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May 17, 2010
How do I randomly select 1 string from some Text? For example: Main text:
[Code]....
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Dec 23, 2010
I have a quite simple application that is having some random locks up. It's just a few text fields that the user fill it up, 3 sets of Radio buttons, one of them with flags to chose the language and click the PDF button. The application uses iTextsharp to load a PDf template, insert the text into it, depending on the language loads some extra text from a .xml file, and depending on the radio button removes the images from the PDF, closes the pdfstamper and uses [Code] to open the file with whatever PDF application the user have installed and closes itself.
Sounds simple, but after the application is installed in the machine (never in debugging mode) it randomly locks up the application. I tried re-publish the application commenting out the Start(filename) line and the thing stopped locking. And I double checked it, re-publish with the line again and it locked after just a few attempts. [Code]
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Jan 28, 2011
Basically, I'm not sure if I'm thinking along the correct lines when trying to break this down. The program is supposed to display the question "How much is _ x _?" with _ being a randomly generated number between 0-9 which I have in a label. The student inputs the answer and clicks the "Answer" button. If he gets it right, the label below outputs "Very Good!" and automatically puts a new question in the above label. If the student gets it incorrect, the output is "No, Please try again." and the student keeps trying until the question is answered correctly.
My method of thinking on this is that the random.object generator is input first so the question with the numbers are output in the first label. Then, under the Sub answer.button, enter the statements that will either check and refer to the above statements to get a new question or have the student try again until it's answered correctly. One of the other criteria for this is that I have to use a function for the calculation. Would the function statement, because it has to return a value, go before the answer.button code or after?
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Feb 12, 2011
I have 4 set of words store in array and wan randomly selects and scramble its letters in a label. i just know how to do the coding part of randomly display the words in the label but it no scramble i have no idea to do the scramble part, any expert can give the solution or example?
Below is my code:
Dim word(4) As String
Dim random As New Random
word(0) = "superman"
[CODE]...
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Mar 6, 2012
randomly select a single student out of the student array based on their subscript number. This will be accomplished by the following:
[Code]...
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Mar 11, 2010
I need to randomly pick an element from an array and I can only use that element three times,I can randomly pick the element but how do I go about only using it three times.
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Nov 13, 2010
I have to search within an array and display the number of occurrences that a value within the array appears. I know that my code is incorrect but this is what I have so far. If anyone can point out what I am doing wrong that would be great.
Private Sub btnResult_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnResult.Click
Dim intSearchAmount As Integer
Dim intCounter As Integer
Dim intIndex As Integer
[code].....
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Mar 11, 2010
my code is :
[Code]...
The error is Value of type '1-dimensional array of string' cannot be converted to 'String'.
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Jul 13, 2010
i have an array contains a-z.Then i have a textbox and when click on the button, it will replace the text inside the textbox to the index number of the array.Example, from "abc" will become "0 1 2" The code below do the job.how to do so that i can replace the text inside the textbox from "0 1 2" back to "abc" based on the array?
Dim txtKey As String = readKeyTxt.Text
readKeyTxt.Text = ""
For Each b As String In txtKey[code].....
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Aug 25, 2010
I need to append STRINg to Array and cast it 1-dimensionalArray
Dim remoteFileNames(0)
As
String
[Code]....
Here "FtpRemoteDirectory" is a string and ftpFileNames() is the Array String which list the FileNames.
and remoteFileNames is 1-dimension array
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Feb 24, 2009
I am writing an OPC Client in VB.NET (2008) and I am using an OPC wrapper from Graybox. I am having some problems with the data types. I have an Array of String that contains all of the OPC Items that I wish to read from the OPC Server. When I attempt to use the Array of String, Option Strict causes the following compile error message:Error 5 Option Strict On disallows narrowing from type 'System.Array' to type '1-dimensional array of String' in copying the value of 'ByRef' parameter 'ItemIDs' back to the matching argument. How do I pass the Item ID's (all strings) in an array?
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May 27, 2010
I'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
[code].....
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Oct 7, 2009
I have an array defined As string and the value stored in site is like "7E", "A1" and so on. But in order to send out this array through serial port. I need to change the the array to As Byte instead of using As String. How can I convert it?
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