VS 2010 - What Is An Integer And A String - Code An Own Sub
Mar 8, 2012
Just started programming with visual basic 2010 after programming a lot with vbs (Visual Basic script) it looks a lot like each other but there are a couple of differnces so here are a couple of questions.
1. What is a integer and what is a string?
2. Can i code an own sub? so it works at all times and not only when i " do something" (press a button or something like that)
for example: if progressbar1.value = 10 then msgbox " well done" now i can only add this line when i connect it to a button or something but i want to connect it to all the lines.
3. whats wrong with this line?: WebBrowser1.Navigate [URL]
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Jun 22, 2010
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.
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Dec 4, 2011
I have an InputBox where I want someone to input a number. The number would be an integer. The line looks like this amount1 = InputBox("how many?", "how many?")If they click cancel, it errors out because it can't convert blank ("") to an int. How can I do this with InputBox and not get that error?
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Sep 19, 2011
I have a LINQ2Entity problem, I want to get the value, string, from a database, so I select FProducts.Serial_number, and to end the query, I do .ToDictionary. The problem is, it tells me that it doesn't have sufficient parameters, to convert ToDictionary. So I need something like select FProducts.Serial_number, Nothing). ToDictionary. Also FProducts.Serial_number, 0).ToDictionary doesn't work.
Sub GetStatistics(ByVal ProductNumbers As List(Of String), ByRef Passed As Integer, ByRef FailedProducts As List(Of String))
Passed = 0
FailedProducts = Nothing
[Code]...
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Apr 5, 2009
I'm trying to set an Integer value from my.settings.The values comes frpm a listbox, and then inserted to settings (set to specialized.StringCollection)The problem is when i'm trying to get the values and apply them to my function.Error code: Conversion from string "65 & 71" to type 'Integer' is not valid.To me it looks right, but maybe i'm missing something.
Code: Dim test2 As Integer Dim test As System.Windows.Forms.Keysm trigglist As New StringBuilderor Each item As String In
[code].....
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Jun 17, 2011
I have a random generator with a textbox where the user selects the number of randoms they want from a text file that is loaded into a listbox. I want some code to prevent the user from trying to randomly generate more items than what they entered in the text file. I have a messagebox that informs them they entered a higher number than what is in the file, which appears to work until I hit the backspace key to change the number in the textbox. Then I get this error. "Conversion from string "" to type 'Integer' is not valid." I currently have the code in the textbox, text_changed event, not sure if this is the right place. Basically what I want to do is have the message box pop up to inform the user, then reset the textbox back to empty so the user can choose a new number. I already have a textbox keypress event to only accept numbers, no letters. Not sure if I can combine the code to do both.
Private Sub tbxRandom_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles tbxRandom.KeyPress
'only allows numbers to be entered into tbxrandom textbox
[code]....
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Jun 2, 2011
Say I have something like this
Dim Level1 as Integer = 83
Dim Goal as String
Goal = InputBox(" What level is your goal?")
[code].....
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Feb 25, 2011
Im trying to create an app that can Compile and run vb.net code while running. Like I will have a multiline textbox and a button that runs the code. The code should run as if it Were to be in a normal Sub. I've heard of system.reflection but all the examples microsoft provided have failed.
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Sep 1, 2010
how can i convert these datatypes: date to string and integer to string.Because it must be in a string datatype when I display it in a datetimepicker and textbox.
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Jan 23, 2011
I have written a C++ code to modify a string, the code is:
int Len = (nString.length());
char *szString = (char*)(nString.c_str()); // Convert to C string
for (int i = 0; i < Len; i++)
[code].....
I have this so far, but it is not working:
Dim i As Integer
Dim chrArray() As Char
chrArray = EncryptIn.ToCharArray
[code]....
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May 22, 2010
I need to know how to crypt that:
Const FileSplit = "@vorfin@"
Cause its appearing on HEX Source.
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Sep 28, 2009
Depending on a specific string, how would I retrieve a random color-code?
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Jun 29, 2010
I have a lot of strings on my frm and integers so how can rest the value of them to the original. With out going this. The Progress is a string. [code]
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Jul 10, 2011
Basicall, all i need is some simple code that will check if the value in a textbox is a positive integer or not. Something like this:
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Oct 10, 2011
How do I convert from a string to an integer? Here's what I tried:
Price = CInt(Int(txtPrice.Text))
I took out the Int and I still got an exception.
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Oct 8, 2010
I know this is a proper enum:
Private Enum Months
JANUARY = 1
FEBRUARY = 2
...
End Enum
However, I want to have an enum where the string will solely be integers.
Example:
Private Enum ColumnCounts
01 = 5
02 = 4
03 = 40[code].....
Essentially, I didn't want to put the f in there, just wanted to do 01. The way this will be called is:
Select Case (nRecordType)
Case "01"
...
Case "02"[code].....
Because I'm not making an instance of it and not calling a constructor, there's no way to autopopulate a Dictionary.And I don't want to convert to integer so I'm not going to do an array. That is just in case eventually the value gets above 99 and the next value would be A0.I'm trying to think of easy future changes to this and backwards compatability.If you need more explanations, let me know.
Edit 2:This is what I've done now and I think it should work:
Public Class Part
Private Shared columnCounts As Dictionary(Of String, Integer) = New Dictionary(Of String, Integer)
Public Shared Function ValidateColumns(ByRef lstFiels As List(Of String)) As Boolean[code]....
I can't verify that it's going to do what I want to, but it doesn't give me an error when I build it so I'm crossing my fingers.
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Apr 10, 2010
[code]This code wont work, it claims it cant be converted from a string to integer, i have tried CInt, but that doesnt work either.
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Nov 8, 2009
I get an InvalidCastException was unhandled on converting the .value to .text but I can't figure out how to convert it. Tried a few different ways but nothing seems to work. load a file from disk and have that be assigned to the trackbar.value?
Dim FileName = (App_Path() & "SettingsPingTimeout.txt")
If File.Exists(FileName) Then
lblPingTimeout.Text = "Ping Timeout: " &
[Code]....
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Feb 23, 2012
I would like to convert for example the string "98" to the integer 98. Also, is there a way to specify that the value contained in the string is in hexadecimal and that "98" gets converted to 152?
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Jun 21, 2010
How would I ask the user to input what type of engine they want and getting an output of $150
Console.WriteLine("Enter EngineChoice for your vehicle:")
Response = Console.ReadLine()
EngineChoice = Convert.ToString(Response)
[code].....
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Jun 5, 2011
If strCardNum.Length <> 5 Then
MessageBox.Show("Please enter a 5 numbers.", _
"Georgetown Credit", _
[code]....
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Mar 1, 2010
[URL].. and why it wont let me convert string to integer? i was following tutorial learning VB 2008 using 3.5 framework
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Jan 22, 2009
I have a textbox which the user will enter a number into. I then have a label control which will perform a maths operation and write out the resulting answer; atleast this is whant I want anyway however this is not happening.
The code I have so far is
Protected Sub btnWork_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnWork.Click
Dim Work As Integer
[Code].....
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Feb 2, 2010
I am working on a form of copy protection for some software i am developing. In order to generate a unique license for a machine i am aquiring information about the hardware the software is running on. For this task i aquire the 'BIOS version' of the machine using the Win32 libaries. As the BIOS version format can vary from machine to machine i need to be able to convert a string value to a integer so i can perform a mathmatical calculation on it.
A typical BIOS version output may look like 'GBT42302e31' for eg once all the spaces and characters are removed. However this output can change dramatically between motherboard manufacturers.How do i convert the value 'GBT42302e31' to a integer like '5356243' for eg so i can then perform a calculation or hexidecimal conversion on it?.
I have tried the following and they all fail with numerous conversion errors:Cint Convert.ToInt64()
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Nov 25, 2009
I want to take each character in a string and multiply it by 7 then 3 then 1. And then loop back to 7 etc. This is what I got but it doesn't work
For Each ch As Char In row("SCAN2").ToString
product = Convert.ToInt64(ch) * 7
Next
Lets say the first character is 8. It should be 8 * 7 = 56
but I get 392.
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Dec 1, 2010
i'm trying to have a message box show information from a map. granted i am quite new to VB, but i have a good amount of experience in php and some in java.
[code]...
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Jan 16, 2010
I am writing some code which needs me to parse the integer from a string. For example:
Dim str as String = "300ML"
I need to store the 300 to an Integer and discard the "ML" from the end. I can't seem to find a sensible way of doing this other than using RegEx. However, for the life of me I can not get my head around RegEx.
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Dec 8, 2010
Im working with a file and need to set the value of a variable from an integer(which it is in the file) to a String(to be consoled out). Im receiving an error in the if statements.
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Nov 9, 2009
what should I write to validate that my textbox.text include string only or integer only
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Apr 25, 2011
I am trying to write a function which accepts a string as input and gives the integer as output,The string can be in any of these format for ex:2,500.75 or 2.500,7501 or 2'500.7513 or 2500,254 the output of function should be like 2500.56 Basically trying to get rid of the thousand separator which can be either a comma,or apostrophe. ..
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