So far I have made a program that can find all the factors of a number (e.g type in 24 and you'll get 1 * 24, 2*12, 3*8, 4*6,). What I would like to do now is add a check box (called Show_Prime_Factors_chk) that when checked it will also show all the prime factors below all the normal factors.
View 2 RepliesI needed to make a program for finding prime numbers. The logic is that you have to put limits n & m and then LOOP and odd-integer P between n & m inclusive. I have a button to click on my form that displays 2 message boxes, one saying " enter upper limit" and the other say "enter lower limit". I need now to get the results of the odd prime numbers between the limits into a list box!
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
I need my published vb 2008 application to open a helpfile that I wrote. It is a simple .txt-file and this piece of code does the trick as long as the program is not published because I already know where I placed the Helpfile:
System.Windows.Forms.Help.ShowHelp(Me, "C:Helpfile.txt", HelpNavigator.TableOfContents)
After it is published on another pc, the helpfile is not on the root of the c-drive but in the application folder of the program. However, I can not know where the path to the program folder of someone else's pc is. It all depends on where they decide to place the program when they install, right?
It seems I need to replace this little: "C:Helpfile.txt" with some code that searches all the drives and directories and/or points directly to the Helpfile's placement - i.e. the parent directory of the program.
I need my published vb 2008 application to open a helpfile that I wrote. It is a simple .txt-file and this piece of code does the trick as long as the program is not published because I already know where I placed the Helpfile:
System.Windows.Forms.Help.ShowHelp(Me, "C:Helpfile.txt", HelpNavigator.TableOfContents)
After it is published on another pc, the helpfile is not on the root of the c-drive but in the application folder of the program. However, I can not know where the path to the program folder of someone else's pc is. It all depends on where they decide to place the program when they install, right?
It seems I need to replace this little: "C:Helpfile.txt" with some code that searches all the drives and directories and/or points directly to the Helpfile's placement - i.e. the parent directory of the program.
how to find the factor of a number using textboxes and arrays? i dont seem to understand the whole layout
View 2 RepliesI am working on a code where I need to add 21 years to the date 02/15/1957 and have it display the week day of that year. I have been looking at different web sites for visual basic
View 1 RepliesIm trying to add a checkbox to a gridview so that users can select multiple items, but the checkbox is not showing up. Here is my code below. I dont have datafield b/c its tie into a particular column.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:CheckBoxField HeaderText="SELECT" />
[code].....
Have a unbound Datagridview with first column set as a checkbox and second column just has text.When adding a row the checkbox does not show, what am I doing wrong.Code to add Row:
DataGridView2.Rows.Add(False, FolderBrowserDialog1.SelectedPath)
The code that adds the rows also saves to a file and then there is seperate code to load datagridview at the start of the programme.If I close and reopen programme it displays the checkboxes.
objdataAdapter.SelectCommand = New SqlCommand()
objdataAdapter.SelectCommand.Connection = objconnection
objdataAdapter.SelectCommand.CommandText = "Select SerialNumber, EmailAddress, Results FROM Email WHERE SerialNumber='" & txtCriteria.Text & "'"
[code]....
What I want to do is for every row of data in the datagridview, i want to add a column for checkbox. The checkbox will be enabled or disabled based on the value found in the field results. The first time I am pressing the button, it works fine. But the second time i query, it keeps adding another checkbox to the same row. Even for the nth time. Everytime i press the button, a checkbox is added. I just want one checkbox every time i query the dataset.
is there any real advantage to run a GC.collect after that our application has used a large quantity of memory or it is just a psychological factor?
View 17 RepliesI am assigning a 'ds' dataset to datagrid.In addition to that I want to add new column with check boxes.That new column will be first column of datagrid. Currently I am using below code,
DataGrid1.DataSource = dsResult.Tables("Result")
Result table has 4 column....in addtion to that i want to column "Selection" with check boxes
I just want to ask the following infor from you in relation to gridview... I have 3 Grids,
Grid A
Grid B
Grid C
Grid a has already a data but aside from the data in my grid A I want to add another column for a checkBox. Next, when the checkbox is check and I hit the button "Transfer" the row in the grid in where the additional column checkbox has been check will be transfer to grid B and the remaining data will be move to Grid C?
I have a datagridview that I've added a checkbox column to. When I preview my data without the checkbox it works fine. when I run the program and try to load the datatable, I get a data error. I'm not sure what may be causing this. Where can I look to figure out what's causing this error?
View 1 RepliesI am trying to add a checkbox column to a DataGridView in a simple window forms application.
I am pulling back some data from a database using ADO.NET, putting into a datatable, and then setting the datagridview datasource to the datatable. I then want to add a checkbox column as the second column. So far I have this code that seems to work:
' Code here to connect to database
Dim da As New SqlDataAdapter(cmd)
Dim dt As New DataTable
[Code].....
This code 'works' and I get MyDataGridView to show the data with the checkbox column in the correct position in the table.
However, for some reason, I cannot check any of the check boxes in the DataGridView? I have tried lots of things (e.g.altering the readonly state of the column) but cannot get it to work.
I am working on a little project and am having some issues with a checkbox. I am adding a number of checkboxes to an ASP table via code by adding rows and columns dynamically. This all works fine except for when I go to check them based on loading a preexisting record. For some reason some of the checkboxes are getting set to TRUE when the new row is added to the table. [Code]
View 1 RepliesI am trying to add a checkbox to a toolstrip using the msdn sample of adding a datetime control [URL]...
Protected Overrides Sub OnUnsubscribeControlEvents(ByVal c As Control)
Call the base method so the basic events are unsubscribed.
MyBase.OnUnsubscribeControlEvents(c)
Cast the control to a MonthCalendar control.
[Code]...
I am pulling information out of my Access Database and reading to a webpage. I need to add a update, delete, and email function to this page. I am trying to do this with the selection of a check box and buttons for each one. But I am unable to get the delete to do anything but redirect back to the orignal page. For the update I want to be able to pull the info in text boxes and just change the info and click update and it gets changed. I also want to be able to pull their email from the database and put it into a text box to be able to email right from the page. Code for show page and delete page below.
[Code]...
I'm ready to start adding sound to a 3D game and I'm looking for a decent Free library.it would not require DX and be something like:
dim MySound as SoundLib.Sound
MySound = SoundLib.LoadSound("soundfile.wav")
SoundLib.Play3DWorld(Location.X, Location.Y, Location.Z, VolumeModifier, MySound)so far all Im finding is expensive, C#, old, or not .NET compatible.
I have a problem with the RichTextBox on my form. The problem is that the zoom factor of the RichTextBox control does not work if I call the "Display()" sub more than ones. Does any one know what would be the problem? Here is the sub I am using to set the text on the control.
VB
Private Sub Display()
' Enable users to select entire word when double clicked.
DisplayRTB.AutoWordSelection = True
[code]....
I have this number x and i wanted to find all numbers which are relatively prime to it.
My code so far:
For i = 1 To x-1
if [number n is relatively prime to x] Then
ListBox1.Items.Add(x)
End If
Next
I want to rite an application that will print first n prime numbers. For example if user enters 7 you should display: 2 3 5 7 11 13 17 Assume that the user will enter only integer values from 1 to 100.
this is what I have so far
Dim intNum As Integer
Dim intX As Integer
Dim strOut As String
[Code]....
I've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work.[code...]
View 11 RepliesI've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work
View 3 Replies[URL]
Each set of ( 1 million ) prime numbers is in a ZIP file just click on say 1st Million
on the left to download a list as a ZIP file.
Here is a similar page which is a lot easier on the eyes:>>
[URL]
These are of course great to use in any security application or as part of any password.
However with the list so readily available on the internet is it such a good idea to use a prime number as part of a password? Food for thought perhaps? ....
I guess it depends on how long it is too. :-)
You could try to remember one that is close to an important date or other number that you know maybe?
If you are more paranoid use more than one prime number in a password with other characters ( UPPER and lower case letters etc ).
[URL]
I'm working on a console application in VB .net that checks a number that the user has inputted, and tells you whether the number is prime.
The number that has to be inputted has to be between 1 and 100. I have all the code so far and at the moment it can check whether the number is or isn't within the boundries.
What i'm trying to do is compute whether an integer number is prime or not. The program performs this analysis for all odd numbers from 3 up to an input integer limit, for example 100. If the integer in the range 3 to limit is prime, a message stating so is printed. Otherwise, a message is printed that lists at least one other integer divisor. The output for each analyzed number consumes one line of text.
A sample output is shown below:
Limit is 100:
Number 3: is prime
Number 5: is prime
Number 7: is prime
[CODE]...
I understand I need to use loops, boolean functions, vbmath(), strings and multi-line out via concatenation. So I can put this is words how I think it should be done but not so great putting the code together
Test all integers up to the SQRT of the number (100)
limit = math.sqrt(100) + 1
Followed by 1 For statement
For c = 0 to 100 step 2?
And an If statement
If ......
result = false
i need to alter the code to determine if an integer entered by a user is prime preferably to determine if the number entered (between 1 and 50 is even or odd and prime from 51 to 100) i have the code for listing primes from 51-100 (or whatever range needed)but can i condense the code to a smaller foot print rather than have three different sections for each request
[Code]...
I just started to use visual basic last month and I only know the basic codes. No matter how hard I try to understand the codes given by the other member, I can't understand it.So the program I'm making is to show all the inputted values and determine the even numbers, the odd numbers and the prime numbers.I don't know how to get the prime numbers.
Private Sub op1_Click()
a = InputBox("Input Endpoint: ")
For x = 1 To a
[code]....
I am suppose to write a program using if statements and loops: Create an application that reads an integer number from the user and then displays in the List Box all prime numbers (for this project we are going to violate "positive" rule and make our prime numbers be negative as well) between user's number and zero 5 numbers in one row. The application also displays how many prime numbers there are between user's number and zero, and the total sum of all these prime numbers.
View 1 RepliesI'm having a serious brain fart over this but I need a looping statement that will display all prime number from 6 to 10000.
View 3 Replies