I have a function which takes in an integer value. I want to be able to grab the first digit (or the first and second digits in some cases) of this integer and do something with it.What is the best way in VB.NET to get the first digit of an integer (or the first and second)?
View 6 RepliesI run a "make table" query to gather some numbers from a database. I then display a list that contains the numbers that I have gathered. The list will very from 1 number up to 20 numbers. I then want to run a report (print it, not display) using each number in the list. When I get to the end of the list I want to stop and close the list. I can do this if my list were say 10 numbers long each time but the list varies. The below is what I have. I repeat this 20 times(changing the # in the () ) to cover the list if it returns 20 but I want to stop if it is shorter than 20.
List0.Set Focus
DoCmd.GoToControl List0.Name
List0.Selected(0) = True
DoCmd.OpenReport "rptPM SORT REPORT"
The following process determines the squared digit length of an integer. Take any integer and add up the squares of its digits. This will give you another integer. Repeat this procedure until the number you end up with is 1 or 4.The number of times this process has to be repeated before it gets to one or 4 is the squared digit length. For example, if we start with 48, we get:
4^2 + 8^2 = 80
8^2 + 0^2 = 64
6^2 + 4^2 = 52
5^2 + 2^2 = 29
2^2 + 9^2 = 85
8^2 + 5^2 = 89
8^2 + 9^2 = 145
1^2 + 4^2 + 5^2 = 42
4^2 + 2^2 = 20
2^2 + 0^2 = 4
1
This process shows that the squared digit length of 48 is 10.
I'm populating a checkedlistbox with this loop.
Dim week As Integer
For week = 1 To 51 Step 2
CheckedListBox1.Items.Add(week)
Next
And get this result 1 3 5 7 9 11 13 etc.
This is how I want it 01 03 05 07 09 11 13 etc.
Im wondering if how to convert 02/14/2012 to this format '20120214'
I want do save date in my database in that format...because I see it more flexible
I just finished this application where you enter a five-digit credit card number, with the fifth digit being the check digit. everything seems to work except, I can't seem to get it to determine that any number is "valid". Every 5-digit combination that I enter returns "The credit card number is not valid". Im using visual basic 2008 express
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I'm trying to convert an integer (0 to 255) into a 2-value hex string. For instance, if the integer was 255, the hex string would be "ff", if the integer was 15, the hex string would be "0f". The issue I'm having is trying to keep the leading 0. I've been able to overcome this by using an if statement to determine if the length is less than 2, in which I would concatenate a 0, but this is pretty inefficient I think. Here's my
Dim get_integer as Integer = TextBox1.Text Dim hex_value As String = Convert.ToString(get_integer, 16)
If hex_value.Length < 2 Then
hex_value = String.Concat(0, hex_value)
End If
how to improve this? I really would like to get away from using the if statement.
I am just trying to display three payment types of the different mortgage interest rates and terms listed in the arrays. the loan amount is constant.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
I have a problem when debugging a code. On top of class I declare an array, and the length of array is an integer variable which is applied value below declaration of array.
E.g. class declaration
Dim array1 (2, integer) as string
Public Sub
integer = 5
End Sub
So basically, array is created with integer being 0 or whatever, because it is declared before integer was assigned a value. But the problem is, I need it to be declared at class variable so I can use array in different subs.
I was working on editing a code for a simple text program, but when running the program for multiple lines, the text being read gets too long or too many lines, the computer slows down alot and almost stops functioning. I am using standard integers like document.lines.length or listbox.lines.count. I think these are standard integers and I need to know how to enable them as Long of Float Integers.
I'm assuming I just change
Dim X as integer to
Dim X as long
or Dim X as int16
But I'm not sure as everytime I change something I get cannot convert to double. The code I'm interested in changing is ...
For i As Int16 = 0 To ListBox1.Items.Count - 2
The list box will only get to about 3000 items or so.
and
For iPos = 1 To xy
If Mid(sString, iPos, Len(Text1)) = Text1 Or Mid(sString, iPos, Len(Text2)) = Text2 Then
JJ = TextBox1.GetLineFromCharIndex(iPos)
This read box will read documents above 32,000 lines, which is the reason for not wanting to use Integer.
I'm supposed to write a program that validates an inputted ten digit ISBN number using the check-digit at the end to ensure that the sum is a multiple of eleven. Before calculating this and detecting if the entered number is indeed a valid ISBN, we're required to check the first nine digits and see if they are indeed integers. After this the tenth digit is checked to see if it is "X" (for ten) or 0-9.
With the code I've written it keeps returning false for whether or not the ISBN is valid, even with valid numbers. I feel like its something to do with the hyphens; have I misused the replace function?I'm a little lost on how to make my code work, but I'm fairly certain my logic is okay so far.
[Code]...
I'm making a project that randomly picks a number from an array, but if it picks a number less than 10 then the number is a single instead of a double.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim N(2) As Integer
N(0) = "0" & 1
N(1) = "0" & 2
N(2) = "0" & 3
[Code]...
Ok, I have like this:
Public basic_numbers(10) As Integer
basic_numbers(0) = 0
basic_numbers(1) = 1
[code].....
i want a button to perform a function of checking the last digit number in a field of a table in and add a digit to it and display it in a textbox.
View 1 RepliesI'm using Visual Studio and table adapters using an Access DB as the backend. I need the minimum 4 digit value. I want to get next available 4 or 5 digit number. And this will change depending upon the users request. Currently I use a table adabpter query. But how would I write a query. I suppose I could do a long iterative loop through all values until I see a 4 digit.But I'm trying to think of something more efficient.
Function GetNextAvailableNumber(NumofDigits) as Long
'SQL Code Here ----
'Query Number Table
[code]....
this is not working?
[Code]...
End WhileI am trying to read from the ": " to the end of the line. I keep getting this error: Index and length must refer to a location within the string. Parameter name: length
am getting the above exception while swaping Items in the list(lstRoutePriority).PFB my code
if (lstRoutePriority.SelectedIndex > 0)
{
//Swap the two items
[Code].....
I am working on a VB application in Visual Studio 2005. I have a number of fields where the user needs to enter currency amounts. I am using a MaskedTextBox with the following currency mask. msktxtAssessedVal.Mask = "$ #######.99"
The problem that I am having is that when the users type in the value, the cursor always starts at the leftmost position and appears to force that many digits. The typical data values can vary anywhere between 9,999,999.99 and 20,000.00. If the users do NOT have a value that has 7 digits left of the decimal point, they need to move the cursor to the correct position before they start typing in the value. These users are used to quickly typing in their data, then tabbing to the next field so the current behavior is not acceptable.
Does anyone know if there is a way for the maskedtextbox or any text control to detect where the user types the decimal and format the data accordingly?
I am looking for a way to make my forms fit varying sizes of monitors. I am guessing that I need to determine the screen size.
View 3 RepliesCurrently I have two tables in a Database (Temp, Main), currently I have four fields in Temp(ID, Qty, LastDate, AddRem), and Three in Main, (ID, Qty, LastDate). I have the program set up to enter in all the information minus AddRem into Temp, then my thought was to either tag the item to remove, or add to the Main table. I'm assuming this could be done by import then update, however every avenue I've attempted has been meet with Exception errors.For the add/remove field it is linked to a Combo Box, which brings me to my other question, how would you link a specific field to say hey if it's this option then add, and if's the other remove?
View 11 RepliesI want to do is blend two images together with a varying amount of transparency using a scroll bar/trackbar. In software I can do it by drawing an image into a picture box and blending another image on top with a varying amount of transparency but it is using gdi which of course is very slow. I would have thought that it should be very easy with fairly basic modern graphics cards but I am so bogged down with examples of how to draw fancy rotating rectangles etc with direct x that I can't see through it all. Should I look at directdraw, direct3d, opengl?
View 2 RepliesWhat's the best way to convert a varying size byte array to a string, and then to convert it back?
View 3 RepliesBasically. I enter a name and a score. And my program will store them in an array. Then i press "grades" and it provides me with a grade for each name and score entered.BUTi now need an array that will give me a count of how many numbers are in the array.e.g.
1 | James | 56 | Pass
2 | Bob | 98 | High Distinction
..
[code].....
I need to display 3 columns and a varying amount of rows (typically around 50) in a windows form, kinda like excel. The data will likely be longer than the window, so a scroll bar will have to come into play somewhere.
View 1 RepliesI have a number of unrelated subs and functions that do various things on my server (e.g. Lighting control, data caching, server maintenance, etc). They are all in various classes which I have coalesced into a single solution.My goal is to create a single, simple interface which each of these disparate classes can be integrated and called from a command line interface. Instead of hard-coding a longish case statement which parses arguments and passes them to the various subs, I wanted to make a generic class which can be instantiated with a minimum of information and put into a data structure. Ideally, adding a new function would involve:
1.) Providing the function pointer (Delegate). The delegates will have various signatures. This is the crux of the question.
2.) Providing ancillary info such as the command-line callable name, number of arguments, argument types, etc.
I have a 100% working class called "node" which is basically a hierarchical tree of node instances. I can use this to simply organize function calls in related branches. All is working quite well.NodeFunctionDelegate(ByVal args As String) As String.The node takes the arguments passed to it by the command line and sends it as the "args" string as comma-separated. The delegate function then needs to know how to split up these comma-separated values, type them, tryparse them and etc. It then must return some string.It works, but it involves writing a middle-man function stub which can receive the argument string from the node class, do the parsing and type checking, and then call the destination function.My goal is to eliminate this trivial middle-man function. The problem is, I can't figure out how to create a variable-signature delegate for the node class.
I have a field displaying on a datagrid that the user has asked to be variable length based on the data that is returned. Is there an easy way to determine how many characters are returned for a field and then converting that to a pixel length so that I can change the length of the field in the code.
View 2 RepliesI am working on a Windows application written in VB with Visual Studio 2005. I have a number of fields where the user needs to enter currency amounts. I am using a MaskedTextBox with the following currency mask. msktxtAssessedVal.Mask = "$ #######.99"
The problem that I am having is that when the users type in the value, the cursor always starts at the leftmost position and appears to force as many digits as the mask. The typical data values can vary anywhere between 9,999,999.99 and 20,000.00. If the users do NOT have a value that has 7 digits left of the decimal point, they need to move the cursor to the correct position before they start typing in the value. These users are used to quickly typing in their data, then tabbing to the next field so the current behavior is not acceptable. We previously used a ComponentOne MaskedTextbox, however, their controls now are no longer free and the boss will not pay!!!
Does anyone know if there is a way for the maskedtextbox or any text control to detect where the user types the decimal and format the data accordningly?
I wanted to get your feedback on a design/coding issue. I have a treeview which represents the device tree in device manager. I also have two listviews which display information about the currently selected device on the treeview. I'm only concerned with the first listview at this point. The information displayed in the listview varies depending on the selected device. I'm using the node index to track which device class and device is selected and I pass this into the device class Display method. I hate the idea of a big Select Case statement. Then there is also the dynamic nature of the device tree to consider.
View 2 Replies"Index and length must refer to a location within the string. Parameter name: length" whenever I run this code
[Code]...
If using the following in an if statement I get an error: If trg.Name.Substring(4, 6).ToUpper <> ("ABCDEF") Then I get the error: "Index and length must refer to a location within the string. Parameter name: length"
I assume this is because the string (trg.name) is too small for the 4, 6 substring. What would be the correct method of working around this problem? VB.net Studio 2008.