Limitation The Length Of Double Variable?
Mar 22, 2009I need to truncate to sertain amount of decimals for example : dim x as double;x= 6.98455 textbox1.text = x that mean textbox1.text= 6.98455 I need textbox1.text= 6.99
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VS 2010 Get Double Fractional Part Length
Nov 20, 2011I am creating a math related class and one of the problems I have been having was how to create a function to return the fractional part of a double as an integer. I could easily do that if there was a way I could get the length of the digits.
-3.141 should return 3
-0.125 should return 3
-0.5 should return 1
-0.4545 should return 4
I would like to do this without using string manipulation. So far all I have gotten on the web is unanswered questions. I thought of using log, but it doesn't give the desired result when working with numbers < 0
Limit A Variable Length
Jun 9, 2011I have an integer that is storing the result of a division between two numbers. I usually receive an result that looks like 5,2496874654. How can I limit the variable length so it looks more 'approximated', like 5,25?
View 11 RepliesVS 2008 Variable Name Length?
Aug 6, 2009Me and my coworker were discussing variable names today because we both have completely different naming conventions...but we were wondering is the a limit on the length of the variable name??? is it posible to do this: dim
ItsPeanutButterJellyTimePeanutButterJellyTimePeanutButterJellyPeanutButterJellyPeanutButterJellyWithABaseBallBatPeanutButterJellyPeanutButterJellyPeanutButterJellyWithABaseBallBat as string = "lol"
Declaring A Variable Length Array?
Apr 26, 2010I am new to VB.NET but used to write a lot of code in VB 6.
How do i declare a variable length array in VB.NET?
In VB6, i would just put:
Dim sArrayList() As String
But when I do that in VB.NET, it highlights my array name and says "unused local variable". What do I need to do to get it to work without an error?
Forms :: Variable Length Text?
Mar 19, 2009G10L41T20P0C15D1.2S1I0E1.2H4.7262K0.J0Q1450N000000 01
G10L41T21P0C19D0.87S1I0E0.875H5.9386K0.J0Q884N0000 0001
G10L41T22P0C2D0.53S1I0H7.3233K0.159B0J0Q236N000000 01A0.
[code]......
Marshal Variable Length Array?
Jun 8, 2010I'm trying to call the GetInterfaceInfo Windows API - it accepts a structure as one of its parameters and this structure has a member that is an array. The API populates the contents of the array when it is called and there can be any number of items in the array. How can I define such an array in my structure?
If I just use a normal .NET array like so then the program just crashes (no exception thrown)
<StructLayoutAttribute(LayoutKind.Sequential)> _
Public Structure IP_INTERFACE_INFO
Public NumAdapters As Integer
[Code]...
and this works fine, but the problem is I have to define the SizeConst attribute as you can see to something large (64 in this example) so that the API doesnt fail because the array wasnt big enough. Firstly this is a waste of memory as in most cases the number of items the API sticks in the array will be less than 10, but secondly if there was ever a case where the API wanted to put more than 64 items in then it would fail.
Using ReDim to set the length of the array at runtime seems to have no effect, and that SizeConst attribute has to be set to a constant value so there's no way I can dynamically set it.
Variable Length Multidimensional Arrays?
Mar 2, 2009Is it possible to have a 2 dimensional array of a type struct such that the size of the last dimension can vary by element of the first?eg:-structure mydatadim param1 as integerdim param2 as byteend structuredim main_array(100,10) as mydataThen at anytime change the size of the last dimension like...redim main_array(10, 5)redim main_array(15,7)leaving all other array entrys' last dimension unchanged and independent??VB2005 starter
View 3 RepliesDetermine The Length Of A String Variable In VB10
Mar 6, 2012I try to determine the lenght of a string variable, but get the wrong outcome when using: testje = Len(testSTR). When I insert the following line of code: testje = testSTR.Length the answer is still wrong but when I click "Length" I see the correct value. How to get at that value, so I can use it?
View 11 RepliesTransfer An Array Of Variable Length Between Subroutines?
Feb 3, 2011I have 2 arrays X(n) and Y(n). I would like to pass them between subroutines:
Sub sub1()
...
call sub2(X,Y)[code]...
The problem comes when n can be changed in sub1 say a textbox. How do you transfer an array of variable length between subroutines?
VS 2005 - Length Of Array Is Integer Variable
Apr 26, 2009I 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.
VS 2010 Variable Length Rows In Table?
Dec 26, 2011I am wanting to create 2 tables called Stores and Locations. Locations is a table containing a unique location_code and a location. Stores is a table containing a unique store_code a store name and a variable number of location_code's and a relationship is set up between the 2 tables.
creating the Stores table in particular the location_ code. Can rows in a table have differing numbers of columns? as a particular store type could be in many diferent locations. I feel it should be possible to set up some sort of array of Location_code's in the Stores table.
VS 2010 Conversion From String "Length - Ft" To Type 'Double' Is Not Valid?
Sep 6, 2011I'm new to this board and I was wondering if you guys could help me out. I have a problem that needs to be resolved before 9:30PM tonight.
I'm a bit of a sloppy coder so work with me. Here's the code that's giving me problems:
[Code]...
I have 6 text boxes, 5 of which accept input. When they're focused on they become blank for a number to be typed in and upon losing focus, they add the labels etc. on their own.
Declare Fixed Length Variable Arrays In Structure?
May 25, 2012How do I declare a fixed length variable array?[code]...
View 1 RepliesDeclaring Fixed Length Variable Arrays In Structure?
May 25, 2012How do I declare a fixed length variable arra
Structure MyInformation
<VBFixedString(4),System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr,SizeConst:=4)> Public ReturnStatus As String
[code]....
Regex Replace All Characters In Variable Length String?
Oct 6, 2010Using VB or C#, I am getting a string of variable length from the database. This information is sensitive information that only certain users will be able to see.I have two cases that will use the same logic (I think).scenario 1: replace all characters with xscenario 2: replace all characters with x except the last 4 characters (assume length > 4 - this check is being done).I thought that this would be easiest using Regex.Replace(input, pattern, replacestring). As opposed to a lot of string handling with substrings and forcing a length of 'x's.
View 2 RepliesSocket.Receive Method - Increasing The Length Of Variable
Nov 28, 2009While using the Socket.Receive method to receive messages through network, you should define a variable as the buffer and you have to specify the length like this: Code: Dim _ReadBuffer As Byte() = New Byte(LENGTH) {} My question is: What is the bad thing about increasing the length of this variable even if the received messages are sometimes shorter? (i.e. if some body let it 10000).
View 1 RepliesC++ - What Is A Variable With & -> Double&
Sep 12, 2011So I have a class made in c++ and need to convert it into vb.net but I got problem converting a certain part of a function. [Code] What type of variable is "double&", I know a double but what's with the "&"? It isn't " double &dec_deg" so it isn't an address (pointers etc.)? and how would i convert that to vb.net?
View 5 RepliesInterface And Graphics :: Program Generated Variable Length Form?
May 10, 2011I have an existing vb.net application which uses a home grown database. The database has over 60,000 unique multi-field records in it.The user can search in each field using drill-down to find a record, and then can add that record to a separate database.(60,000 collectibles described in a master database. User can drill down by category, manufacturer, year produced, etc. to find a record and then add it to their own 'collection', 'wanted', 'have for sale', or 'spares' database for record keeping.)
Instead of having them drill down, I would like for them to be able to perform a search and have all of the results (any amount of matches from 1 to 60,000+) appear on a scrolling form with a checkbox next to each so that they can simply check any that they want and do a mass add to their list databases.
The part I cannot figure out is how to have vb.net (2008) create a variable length scrolling form with the results, and how to identify the checkboxes (generated by the system for search matches) to see which, if any, have been checked by the user.
Clear A Variable Set To Double?
Sep 12, 2009When the clear button is clicked on my interface I need my variables that are set as doubles to clear...I tried setting them to zero but that messed up my equations and caused more problems. Is there some method in double that clears them out or sets it back to nothing.here's the coding
'button i need to clear my textboxs and variables
Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
[code]....
Computation Error Variable Double
Jul 2, 2011im having a simple computation problem here....
[Code]....
Dividing Integers With Double Variable
Apr 4, 2012I've came across to quite an unusual problem with dividing integers with double variable. I've created For loop where to sum-integer interval -double is added. When sum reaches certain number text is displayed as showed below:
[Code]...
Double A Number For Every Time A Variable Is Used?
Sep 18, 2011If i have a variable '12'
and a variable 'hello'
how can i double the '12' each time the variable is used?
What im trying to do is have a textbox which the user writes in a number, the number they enter then determines the amount of times a variable is written in a textbox.
so if the user were to put '3' into the textbox and click go, it would print hello12hello12hello12, how can i increase the number 12?
what i want it to do is look like this when the user presses go: hello12hello24hello36
How To Maintain Variable Value In Double DataType
Jun 22, 2012Datatable contain some values like 0.0,10000.00,54678.94. I am getting that values using for loop and store it in a variable in double datatype. I want to add these nos and store it in a variable. Each time variable value changed.
for loop
Dim ds5 As dataset1.pro_dtsumDataTable = TA5.GetData(TextBox1.Text, users)
If (ds5.Rows.Count > 0) Then
Dim y As Double
y = Double.Parse(ds5(0)("sum(fld_primary)").ToString())
Dim y1 As Double
y1 = 0 + y
End If
Next
First time y1=0.0
Next time the value of y1 is not added to previous value.
I want the result y1=64679.34
How To Plot A Double Variable Function
Mar 14, 2012I'm currently working on an assignment for university and I could really use a hand.I need to plot the equation y=0.2*sqrt(1-(0.25/x)^2)
View 5 RepliesHow To Check If Variable Is String Or Double Type
Jun 16, 2009I want to see if a variable's type is string or double type. How to do it in vb.net immediate window?
View 1 RepliesHow To Take 3 Or 4 Decimal Points Of A Double Variable Without Round Off
Apr 18, 2012I have a double value like 3768.595863. if i round this value then i will get 3768.596 but i want 3768.595.how can i get that?please reply.
View 7 RepliesMake A Variable That Holds Double Qoutes
Feb 10, 2011How do I define a variable which holds double quotes. when I try to define the variable like this [code]...
View 2 RepliesPreserving NULL Values In A Double Variable?
Apr 15, 2010I'm working on a vb.net application which imports from an Excel spreadsheet.
If rdr.HasRows Then
Do While rdr.Read()
If rdr.GetValue(0).Equals(System.DBNull.Value) Then
[Code]....
But when passing the value to the SQL insert I get: "Nullable object must have a value."
Solution:
Fixed by changing the datatype of the parameter in the sub I was calling and then using Variable.HasValue to do the conditional DBNull insert.
Put Data Containing Double-quotes In String Variable?
Oct 14, 2011How to put data containing double-quotes in string variable? Aug 01, 2003 02:30 AM | LINK I need to store a string that contains words in double quotes. The complete string data is presented to the variable in double quotes, but the next double quotes within the data ends the string and the remaining text gives a syntax error. How can I place literal double-quotes in a string variable? For example:
[Code]...