Converting Structure Within Structure To Byte Array For Socket

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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VS 2005 Structure To Byte Array For Socket Send

Aug 28, 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.[code]

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Convert Structure To Byte Array In .NET?

Aug 17, 2009

I wish to write a structure made up of fixed length strings to a file using y.Computer.FileSystem.WriteAllBytes or the like.I am using a VB6 project with fixed length strings that I have converted in to VB.Net.

Structure Record
<VBFixedString(22),System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValArray,SizeConst:=22)> Public tim() As Char

[code].....

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VS 2010 - How To Read Byte Array Using Structure

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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Arraylist Of Structure Within Array Of Structure?

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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Assign Array Of Structure To Another Of Same Structure?

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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Structure With A Structure Array?

Sep 12, 2011

I have two structrures

Public Structure PhoneScheduleEntries
Dim Count As UInteger
Dim PhoneSchedule() As PhoneScheduleEntry
End Structure

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Pass A Structure That Contains 2D Arrays As Byte To A C++ Dll

May 16, 2012

am trying to pass a structure that contains 2D arrays as Byte from VB.net to a C++ dll. The dll returns the structure with the 1D arrays filled. I am using UnmanagedType.ByValArray to pass the arrays from VB.net to C++.

Sample :

----------------------------------------- Structure -------------------------------------------------------
<Serializable(), StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi, Pack:=1)> _

[Code].....

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Structure Inside Another Structure Receives Null Reference Error?

Jan 5, 2012

Module Module1
Public Structure structure1
Public TRANS() As structure2
End Structure
Public Structure structure2
Public X() As Integer
End Structure
End Module

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Class Structure - Large Structure That Has Lots Of Properties ?

Jan 5, 2010

I'm new to VB 2008 after having spent a long time with VB6, so I apologize if this is a stupid question. But I'd really like to have this straightened out.

Let's say I have a pretty large structure that has lots of properties.

Code:

Now say that I want an internal database with about 10 instances of this structure total, describing, say, 10 different products that a store sells. When these values are loaded from a database, they remain totally static. (However, they can be different each time a program loads)

Now say that I have a class. Each instance of this class is a type of that BaseProduct structure. Meaning, each instance of the class pertains to one of the 10 types of products that the store sells. However, this class has additional properties that pertain specifically to each instance, which are not static.

Code:

Now, the problem here is... If I have 200 different transactions, each one contains an instance of BaseProduct. BaseProduct is HUGE, and is largely redundant (only 10 types possible), so I think it's a little silly to include a whole copy of it with EVERY transaction. However, the Transaction class really needs information regarding the base product it pertains to. Is there a way to, instead of declaring a New BaseProduct in the Transaction class, to simply make one of the properties of the Transaction class a pointer to a BaseProduct variable?

In VB6, I would accomplish this by making a BaseProduct(10) array, and then giving each Transaction an ID number referring to an entry in that array. But in VB 2008, using class structure, this is impossible. I can't define the BaseProduct(10) array outside of a class in a namespace, and if I define it in the actual application's form, then the class loses modularity since it relies on the application that's using it.

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Invalid Structure Size When Marshalling C Structure To .NET

Apr 14, 2012

I'm experiencing a problem with the following c-structure:

typedef struct tagTEXTUREPROP
{
DWORD dwSize;

[Code].....

The Marshal.SizeOf obviously calculates a size of 76 and it works with the DLL function, but it leaves me with some bad feelings.

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VS 2008 Convert The XML Structure Into A Class Structure?

Apr 25, 2010

I'm having a problem that's driving me crazy; I can't understand how to convert the XML structure into a class structure (that I want to use to hydrate a XML document).

The XML document looks like this:

xml
<?xml version="1.0" encoding="utf-8"?>
<artists xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/" xmlns="http://www.spotify.com/ns/music/1">

[code]....

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Array.Sort Returns Blank Data When Sorting A Structure Array?

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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Passing A Structure Containing An Array Of String And An Array Of Integer Into A C++ DLL?

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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.net - Array Defaulting To 'nothing' Rather Than '0' In Structure?

Mar 29, 2012

I'm currently stuck on an issue regarding declaring an array of type short in a structure and having it default to 'nothing' rather than '0' after ReDim.'Declaring array and setting it's initial size

Private Structure Totals_T
Dim sTot_Desc As String
<VBFixedArray(10)> Dim iTot_Cnt() As Short
Public Sub Initialize()
ReDim iTot_Cnt(10)
End Sub

[Code]...

When calling m_Totals(0) the arrays returned have 10 records in the arry with sTot_Desc and iTot_Cnt having values of nothing in all records. When I ReDim m_Totals both the variables I declared in the structure(sTot_Desc and iTot_Cnt) are declared as nothing, it's fine for the String but I need the Short I declared to be declared as '0', which is what I thought happens when you ReDim. Can anyone see what's going on here and why it's declaring my variables as 'nothing' rather than defaulting to '0' for the short and ""/nothing for the string?

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Code An Array Of Structure?

Mar 26, 2009

I am once again struggling with my weekly project. I am assigned to write a program that converts a predetermined english sentence to both french and german. The code is to contain an Array and a structure. Also we have not covered retrieving array data from a TXT file, so we are to hard code in the array data. I coded the structure and the array, I added the array data, but am confused how to access the data. The examples I have found all deal with retrieving data from a TXT file. Can someone give me a nudge in the right direction.[code]....

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Create An Array Of A Structure?

May 1, 2009

The more I read my book the more confused I get, as the programming example is not even close to what this assignment is I am to modify my existing project to keep track of an order in an array.

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Multidimensional Array Within A Structure

Oct 23, 2009

I'm very new to VB.NET and I suppose this is a little big for a first project.I've done the same thing in other languages so I figured it wouldn't give me much trouble.I'm working on a map editor program for a 2D platformer game.The map will be an array of a structure which contains the width, height, and tile elements of each layer. the tile elements are stored in a 2D array within the structure.[code]That didn't give an exception but I'm not sure that it actually redimmed considering the second assignment command still crashed.

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Sort An Array Structure?

Oct 25, 2011

I have the following array structure defined and am having trouble figuring out how to sort it..

Public svrElements() As svrElementRec
Structure svrElementRec
Public ElemName As String

[Code]....

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Structure Containing An Array Element?

Jul 7, 2009

I am writing a class and room scheduling program, and would like to use an arraylist that will contain structures. The structure has a couple of arrays in it for when the class meets, and I am having difficulties figuring out the correct syntax to declare the array in the structure. Additionally, in the syntax to access the array. For instance, say I want the MeetingDays to be T, F, T, F, F, F, F; the Meeting Times to be "8:00AM", "", "8:00AM". "", "", "", "", ""; and the Duration to be 75, 0, 75, 0, 0, 0, 0

Public ClassList As ArrayList = New ArrayList
Public Structure MyStructure
Private _ClassName As String

[code].....

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Using An Array Inside Of A Structure In VB?

May 17, 2012

I'm trying to create a structure and inside it put an array of "Genres". This is my structure declaration:

Structure BookData
Dim strGenres() As String

[code]....

But I keep getting an error with the .strGenres(5). VB is telling me "End of statement expected"

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Using Indexof With Structure And Array

Mar 11, 2009

I'm having a bit of trouble trying to iterate or search through my array (or structure).I am reading in some values from a file, and populating my array.Then, I need to search to compare to one of the values in my array.[code]any pointers? should I use something else instead of arrays / structures ?

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.net - Sum Similar Element Of An Array Of Structure?

Feb 11, 2012

I have an array of structures:

[Code]...

An array of the above structure with 30 element. I want to sum the empsal of those emp elements whose emp.empName & emp.empAge is equal.

[Code]...

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Adding To An Established Array With A Structure

Feb 13, 2012

I am trying to be able to add to an established Array that is read in from a CSV file. I'm using structures and I get the concept, but I just can't seem to get it to store. I am using Visual Basic 2010. Sorry for posting in here, but I did not see a category for it.

[Code]...

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Declare A Array Within Structure And It Is Not Working

Nov 15, 2011

I am trying to declare a array within a structure, and it is not working. [code] So I want each league to have a single name and id and 20 players.Is there a way other than writing out dim player1, player2 etc.

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Declare An Array In A Structure (textboxes)

Jan 11, 2012

Can anyone tell me how I would declare an array for data that will come from textboxes? Every example I find seems to be data that comes from an input box, and the array name would just be strInputbox, for example. However, in my case the user will input data into several textboxes (each named txtBox1, txtBox2, txtBox3, etc.) and I'm not sure how to write this.

Thank you.

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Delete A Position On Structure Array?

Dec 8, 2011

I'm working with a structure array but I don't know how to delete a specific position...

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Function Return An Array Of A Certain Structure?

Apr 24, 2012

I've this code, but there is a problem with setting values. I get "null object" error. how to work properly with functions.

Public Structure Results
Dim Nickname As String
Dim Result As Integer

[Code].....

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Getting Error When Trying To ReDim Array Structure

Jun 27, 2011

This is my structure...
<Serializable()> _
Public Class AcctRecords
Public Amount() As Long
Public DateC() As String
[Code] .....

This is where I try to create a new instance but I get an error that states:
Overload Resolution Failed Because No Accessible "NEW" accepts this number of ArgumentsPrivate Sub FixMasterArraySize(ByVal Cnt As Integer)
ReDim Preserve Acct.Master(Cnt)
For I As Integer = 0 To Acct.Master.Length - 1
Acct.Master(I).AcctType =
New String
Next
End Sub

If Acct.Master(I).AcctType was a Boolean type there would be no error..

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Method Of Search In An Array Structure?

Jan 6, 2010

I have this as the structure

Public Structure TagInfo
Dim TagName as String
Dim hpt as Integer

[code]....

have the structures are populated and when the form opens up, I make a copy of the structure.on my form i have a textbox... that would have information matching the TagName(x).TagValue I am trying to figure out how i could find that value in my textbox quicker than doing a loop through the tagname structure.

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