Lets say I declare a public array for a structure, and initially I give it 99 indexes (well 100 with base 0), how would I get the first empty index? I thought of doing it like this but a structure array cannot be nothing:
Dim index As Integer
Dim RecipeItem As New RecipeItem
RecipeItem.name = InventoryList.SelectedIndex
RecipeItem.amount = AddItemAmount.Value
For index = 0 To _recipe_item.GetUpperBound(0)
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Trying to input a high setpoint, low setpoint, a % load, and number of compressors, then calculate the temp that all compressors are off. Then build a datagridview with the staging of compressors from all off to all on for each compressor up to 10 compressors.I am trying to insert headers from 1 to 10 compressors (Variable) with the text "Comp1", "Comp2", etc....Two rows with header. I am trying to use an array with index number to insert the text, but that is where my problem happens."Index was out of range".Here is my code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer, num1, num2, num3, num4, alloff As Single, stg As Single
TextBox1.Focus()[code].....
I am coding a program for a movie trivia game that randomly shows a movie quote and the the user selects a movie name from a combo box that matches. I used a array for the movie quotes and a comboBox for the movie names. I have coded a portion of the program but I am stuck on how to compare the array quote being shown to what movie the user selects from the comboBox. I have tried numerous different things but none seem to work right. The way I have it coded now it shows that every movie I pick that it is right even if it is wrong. I am going to show part of the code here and also attach the entire solution for anyone that needs it .
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Per this UserControl that can be added to a blank form, I would like to use the HorizUnits array below to map custom grid x coordinate from a mouse x position.For a given input value 13, what syntax would I use to obtain a value of 2 where 13 lies between Value 10 and 16 for which 2 (Name) would be the custom grid's displayed coordinate position?
View 1 Repliesi 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].....
I'm working on a program to delete files from a certain folder after they have aged a certain amount of time and either match via regex or extension. I'm running into an issue where files() could be:
files(0) = Nothing
files(1) = Nothing
files(2) = Nothing
etc....
Right now the way it is written, I could place
Else
log(1) = data(1)
log(3) = "Array field empty"
InsertLog(log)
And the program would log as many files as file(i) = Nothing holds. This would create redundant database records and is not wanted. Is there a way to figure out if ALL files(i) = Nothing and then place code in there to insert into the database?
'If log(3) is successful that means no files were old enough or deleted successfully
If log(3) = "Success" And IsArray(files) Then
For Each file In files
If Not file.IsNullOrEmpty(file) Then
'If files is actually something insert into the log
log(1) = file
[Code] .....
On a button click I need to test whether or not an array has been filled, if it has the user gets linked to a new form otherwise they receive a message box telling them to first assign values to the array.
I've tried 'If MyArray Is Nothing Then....' and 'If MyArray.Length < 1 Then...' but neither seemed to have worked.
find the first empty value on an array?Say I have a directory and will occasionally be adding and removing items from an array to represent this. How would I go about making a loop until the entry is empty. I've tried various things like if null and that sort of thing but none of them seem to work- the problem is I guess that this array value is empty and the system can't deal with it without throwing an error message.Creating an array of a set size from the start isn't an option as I've no idea how big the directory will ultimately be.
View 19 RepliesWhat is the best way to take an array in VB.NET which can either be Nothing or initialised and give it a length of zero?The three options I can think of are:
ReDim oBytes(-1)
oBytes = New Byte(-1) {}
oBytes = New Byte() {}
The first example is what most of the developers in my company (we used to do VB 6) have always used.
Given
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i noticed a problem with a program i made that occurs when an array element is called to use but is empty under a certain condtion therefor throwing an exception. i tried to define that element after the array was initialized to give it a default to use, but its not workin for me?
View 8 RepliesHow do you declare an array when the array is initially empty?? I am taking multiple measurements from a meter that I want to put into an array. How would I declare that?? Here is my code to accept the last measured value.
HTML
Dim measResult as string
For I as Integer = 1 to 4
measResult = objDevice.gpibRead(i, 30) ''30 is the buffer size
Next
How can I set up measResult so it is an array that will hold all of the measurements from the meter?? I have tried Dim measResult() as string, Dim measResult() as String = objDevice.gpibRead(1, 30) but no luck.
So I have a function that looks up values in a jagged array, and it goes like this:
Private Function Lookup(ByVal Search_path As String) As Integer
Dim i As Integer = 0
Do Until MasterIndex(i) Is Nothing 'throws an exception here
[Code]....
Problem is, when I test this with an empty array, it gives me the error of Index was outside the bounds of the array at line 3. How do I fix this?
Remove empty elements from char arrayI have this [code]...
View 6 RepliesI have an array set up to receive the names of forms when they open. The form name is sent as a Form not a String therefore when I run my code I cannot check for whether the field is empty in the normal way (ie. array(1) = "") as the "" are only usable with strings!
Dim Forms(24) As Form
Dim i As Integer
Dim Free As Integer = -1
[CODE]...
I only need a solution to do the same as array(1)="" but for windows forms.
I have a large one dimensional array that is called ArrayHold which is populated at runtime. I run a loop to scan through the array to find out which elements need to be removed based on a few parameters. This all works great, now I am left with two arrays. The original one and a new one which contains the locations of the elements to be removed.
Original Array: ("A")("B")("C")("D")("E")("F")("G")("H")
Second Array with index/count of elements that needs to be removed: ("0")("3")("5")("7")
End result should be preferably not in a new array but a "ReDim" of the original array:("B")("C")("E")("G")
What would be the simplest way to achieve this? I could run a loop to make all the elements that need to be removed "0" or ""? Would there be an easy way of resizing and array by dropping/removing all the white space or empty elements?
I keep getting "Index was outside the bounds of the array." error when I run the exe from Debug and Release, but if I put my parameter -dev in a shortcut I do not get this error.Here is the code causing the problem
Dim cmdLine() As String
cmdLine = Environment.GetCommandLineArgs()
If cmdLine(1) = "-dev" Then 'problem[code].....
At the line `If aryTemp(1) < aryTemp2(1) Then the Index was outside the bounds of the array.
error appears. Can't identify why would it be outside array's bounds. Basically trying to compare Last Names to sort the records and place em back into list box.A student record looks like this: FirstName[space]LastName[space]Major[space]Telephone[space]Email[space]GPA
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This is the code for my array (which is working)
Public numUsers As Integer
Public fNameUsers As String = ("......users.txt")
Public UserRecords As Usersclass() 'note... this line is in a module '
reader = New System.IO.StreamReader(fNameUsers)
numUsers = 0
'Split the array up at each delimiter of "," and add new objects '
Do While reader.Peek <> -1
ReDim Preserve UserRecords(numUsers)
oneline = reader.ReadLine
[Code]...
Can I use Long for array indexing? If no what could be done to manipulate large byte arrays (>32bit)?
View 5 Repliesjust wanna get that simple problem.,but i am confused bout this i cant get the index location of an array>
my problem is have to display 5 elements so the index is 0 to 4 right?
example i entered 1 2 3 4 5 then i searched 3 the location should be index 2?right?
how can i get the index location of the searched number?if you can make me understand sub and functions too..
i have a 1 dimension boolean array and i need to get the index of the array element value = true.Anyone can point me a direction?I know i have to use.indexof() but when i try to use Variable.indexof(True) but it won't work.
View 28 Repliesi have created a string array from A-Z, which will contain index from 0-25. Then i have a textbox and when i enter text into the textbox, how can i get the index number of the array associated with the text i entered? For example, i enter "AB" into the textbox, the index return should be 0 and 1. The code below only able to return the index if i enter only 1 letter alphabet. how to return the index number for many alphabets.
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i have created a string array from A-Z, which will contain index from 0-25.
Then i have a textbox and when i enter text into the textbox, how can i get the index number of the array associated with the text i entered?
For example, i enter "AB" into the textbox, the index return should be 0 and 1.
The code below only able to return the index if i enter only 1 letter alphabet. how to return the index number for many alphabets.
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
Dim abc(25) As String
[Code]....
Under VB2 I could create a form with many charts (One form had 12 graphs). You could define the chart once and cut and paste it the required number of times on the form. Each chart had an index and the code used the index to create and update the desired chart with the appropriate x,y data. Is it possible to do this in VB2010?
View 5 RepliesAnother error and I'm not sure where it is comming from:
Structure structHours
Dim StdHours As Integer
Dim OvHours As Integer
[Code]....
Shows i to have a value of 30. Where is this errors comming from?
Every time that to form loads, the tab control loads all information for each element in the array into the tab controls at once, instead of stepping through Error says index outside of bounds of array
Private Sub fillTabControl()
Try
AlbumTextbox.Text = strAlblumNameArray(intCurrentIndex)
[Code].....
I am getting an error when trying to read the second Application. If I remove 'x += 1' then there is no error, but then there's only one item in the array.Private Sub btnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoad.Click
[Code]...
Private Sub btnCount_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCount.Click
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I'm trying to check if a user is logged on on another computer, but when it runs the check I get the following error.
Error: MySql.Data - Index was outside of the bounds of the array.
Public Function StaatOpenRegLogOpAndereMachineByWerknemer(ByVal RegLog As clsRegistratieLogin) As Integer
StaatOpenRegLogOpAndereMachineByWerknemer = 0
[Code].....