VS 2010 Saving A Intptr Array In Structure To File?
Jul 16, 2010
i need to save an array of intptrs as a part of a structure in a file, vb.net gives me "File I/O of a structure with field 'pList' of type 'IntPtr' is not valid." error, ok i figured and tried to convert them to integers and while it worked for other singular intptrs it did not for the array as it just throws me a conversion error. I then tried rebuilding the array in the new sub of the save structure and while that sorta worked(i think) it then gives a "bad size" error when saving. Im out of ideas, saving the array elements one by one would be suicide as the amount varies and is well in hundreds,
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Oct 13, 2009
how to save an array of structure to binary file. I tried the binary formatter but it still aint workin. My code attached
Dim directoryList As String()
Dim fileData() As myData
Dim myFile As myProps
[Code].....
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Mar 23, 2010
I need to explicitly convert my byte array into IntPtr to pass it to the third-party api. I've been looking through Runtime.InteropServices namespace but didn't find anything suitable.
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Dec 9, 2011
I have a byte array and I want to read it using a structure. This is a common situation with structured files having information in various places in the file and it's much easier to read the data if it's mapped with a structure. BitConverter would be great if it worked with Structures, but it doesn't. Basically, I want to read the same memory address either as a byte array or as a structure, or have a function that works like
vb.net
MyStructure = BitConverter.ToStructure(bytearray(), position)
Maybe there's a pointer method to do this?
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Feb 12, 2012
Currently I am saving data from my applications by saving a text file via a stream reader as a string. I have come to a problem. In my current application, I have an array of the following structure:
[Code]...
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Nov 30, 2010
I have a .txt file i want to read that has states by abbreviation and states by name. In that text file some are territories and some are states.
I want to read from that file and put the abbreviations into one structure array and the states into another structure array.
I then want to lookup up the states by abbreviation or state name. The lookup will simply be selected by a radio button which will flag either the states full name array, or the abbreviation array.
all I have is the structures created:
Public Class Form1
Structure Lookup
Dim Abbreviation As String
[Code]....
How can I read from the .txt file and store into an array
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May 10, 2009
currently working through a project using VB 2008 windows form application and having a little trouble with the code. I need to read data from a text file into an array of a structure, displayed in a list box and have a number of searches conducted on the data and these results displayed on the form. The test data is of rainfall across a number of areas and is in the format:
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Jul 6, 2010
How can i write and read a array of a structure to a file? I have the following structure
[Code]...
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Aug 3, 2011
I have an array of structure like this:
Structure Planner
Dim Type As String
Dim Circuit As String
Dim Socket As String
Dim StepCMDText As String
End Structure
how do i write it into a file? (also read it later
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Dec 4, 2009
This code get the data into the file, but no back out.Where am I going wrong?
Code: Function test() As Boolean sFileName = "Carrier.dat" iFileNumber = FreeFile() FileSystem.FileOpen(iFileNumber, sFileName, OpenMode.Binary, OpenAccess.ReadWrite)
If FileSystem.FileLen(sFileName) = 0 Then ReDim tMyStructure(7) tMyStructure(1).name =
[code]....
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Aug 29, 2009
I am trying to communicate with an external device and i am trying to send a byte array to the external device via sockets but i am always getting a response the message size is too small so i am not sure what i have done wrong. Between the data type there should be no alignment present and all numbers are represented in little endian format. The char array is not null terminated as mentioned in the protocol specifications.
I have to send data based on a struct that embeds 2 other struct. So here's my vb.net code for the struct used to convert to byte array and the sending part.
Public Structure MESSAGETYPE_OIP_Login
Dim Header() As COMMANDHEADER
Dim UserName() As PSTRING
[Code]....
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Mar 29, 2010
I'm trying to build something called a structure which will store data it retrieves from a text file. I have the structure set up like this:
Structure Employee
Dim FirstName As String
Dim LastName As String
Dim ID As String
Dim Hours As Integer
Dim Wage As Decimal
Dim EarnedPay As Decimal
End Structure
[Code] .....
How to set these operations up?
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Nov 27, 2008
Define a structure named product, The structure should contain 2 variables one as a string and the other as a decimal. The decimal is used to store the price and the string is used to store the item number.
Declare a module level array that contains 5 product structure variables
Code the main forms load event procedure so that it reads the item number and prices from the itemInfo.txt file The procedure should store the item numbers and prices in the module level array. It also should add the item numbers to the list box.
When the user selects an item in the list box the items price should appear in the xPriceLabel. code the appropriate procedure.
The code I have is as follows
' Project name: Glovers Project
' Project purpose: The project displays the price of an item.
' Created/revised: <your name> on <current date>
[Code].....
Seems the problem I am having is this line is returning a value less than 0.
itemprice = (itemnumber.Substring(productIndex, newLineIndex - productIndex))
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Aug 2, 2011
This sounds like a silly question, and it may not even be possible, but say I have a MemoryStream in my code. Is it possible to get the IntPtr of said MemoryStream?
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May 31, 2012
how to retrive the raw data of the image pointed by an intptr.The thing is the detector gives the pointer to the acquired image and I need to retrieve the image rawdata from the given intptr.
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May 2, 2011
I'm working on a program that when you click a button called new it pops up a new form asking for you to enter a directory location. If the directory exists it saves it into this file:
"C:WindowsSettingsButtonVariableSaves.ini"
I already have working code that saves each directory entered into the ini file on its own line.
Now in this code I'm trying to call each variable back from the ini file when form1_loads and set it to an array called ary() so later I can set the first 10 saved within the array.
So later:
button1.text = ary(1)
button2.text = ary(2)
and so on to
button10.text = ary(10)
and the reason I set the array to record all lines even if theres more than 10 because I want to be able to add more buttons later on.
Here's my current code for saving lines to an array:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim FILE_NAME As String = "C:WindowsSettingsButtonVariableSaves.ini"
[Code]....
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Aug 24, 2010
i want to save and load an array as and xml file. what is the easiers way to do so.
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Jun 9, 2009
I'm working on a project with a large multidimensional array
resrv(200,12,31,33) it keeps track of information on specific dates within a 200 year range.
What I'm looking to do is save the array to a file so that I can load it again when the program is started.
In VB 6 I used to be able to use a simple for next loop into an open file and load it the same way. It doesn't seem to work the same way with Fthe filestream class in VB.net
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Sep 11, 2009
How to save a 2-dimensional array to Excel file. The result would be two columns in one Excel sheet.
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May 23, 2010
I want to make a structure within a structure. Basically it will appear like this:
Structure ID
dim CardType as string
im CardCode as string
[code]......
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Oct 12, 2010
In Vb.net I am trying to assign an array of structure to another array of same structure[code]...
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May 20, 2011
[Code]...
How do I convert this proper? (Option Strict On)
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Jan 16, 2010
I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
[code]....
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Feb 7, 2012
The file structure is fine for retrieving data from the file but when I go to write data to the elements and hit any of the fixed array elements, I get an exception error. this has got to be a sytax problem I am just not seeing.
It seems that I am not addressing the array member correctly yet the same logic pulls it properly from existing records on file.
in a Module I have the structure as follows:
Structure INVOICE
<VBFixedString(6)> Public NUM As String
<VBFixedString(2)> Public SYMBOL As String
[Code]....
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Jun 19, 2009
I'm trying to sort an array based on a structure but whenever I do this, it basically erases all the data in the entire array.I have verified that the array is populated correctly, it is when using array.sort that everything returns blank.
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Jun 20, 2012
I am quite new to VB.NET and I am attempting to create a console application that can write, save, load and edit sets of data. Lets say I have something like this:
[Code]...
However, I have no idea how to load the data so I can manipulate it in the EMPLOYEE structure system. I am not sure if I have made my question clear enough, for as you can see I'm quite new to programming and am not essentially familiar with the terms of speech.
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May 27, 2010
I'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
[code].....
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Mar 23, 2011
How can i read an object "Structure" data from saved file into an array?" I saved my data by (FilePut) Function "this is part of the code I used
Dim MyFile As String = SaveFileDialog.FileName
Dim X As Integer = FreeFile()
FileOpen(X, MyFile, OpenMode.Binary)
[code]......
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Dec 2, 2009
Here's the data I'm trying to work with
Spark Plugs
column 1: PR214,PR223,PR224,PR246,PR247,PR248,PR324,PR326,PR444
Brands:
column 2: MR43T,R43,R43N,R46N,R46TS,R46TX,S46,SR46E,47L
column 3: RBL8,RJ6,RN4,RN8,RBL17Y,RBL12-6,J11,XEJ8,H12
column 4L 14K22,14K24,14K30,14K32,14K33,14K35,14K38,14K40,14K44
Here is what i came up with for my code so far
Public Class frmMain
Private strSpark() As String = {"PR214","PR223","PR224","PR246","PR247","PR248","PR324", "PR326","PR444"}
Private strBrands As String(,) = { { } }
End Class
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Sep 12, 2011
I have two structrures
Public Structure PhoneScheduleEntries
Dim Count As UInteger
Dim PhoneSchedule() As PhoneScheduleEntry
End Structure
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