Set Array Size For All Variables Using Same Structure / Type
Oct 30, 2010
I found out that you cannot set the array size for a structure when you are making it, i.e
[Code]...
I have to fix this by making a variable with type made by Structure bullet and then redimming it, i.e
[Code]...
This means for every variable with the bullet type i create i have to redim. Is there a way i can set the size of .mesh with .capacity for every single variable created with the bullet type automatically?
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Dec 11, 2009
I am upgrading a project from VB6 to VB.NET. Unfortunately, I cannot include the DLL or even the name of the DLL that I am using here, I am under a confidentiality agreement. However, I hope I can post enough info here to get this frustrating problem solved.
In VB.net: Code:
So, if I run it as such, it errors out while calling SetParameters saying
The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
If I comment out the line m_Parameters.SProperties = New S_Properties(9) {...}, then it does not error out, however the function returns 0, which means it did not actually set the parameters to the device. Trying to ReDim SParameters(9) will also give the hresult error. Doing it with my example above, I put a watch on m_Parameters in both VB6 and VB.net and they look IDENTICAL. All data is the same. Why would I get this ArgumentException in VB.NET and not in VB6 when I am passing in the exact same arguments as in VB6?
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Mar 29, 2009
I have create a structure type array. sort the array so i can display the sorted array in a listbox. I want to be able to either sort by last name or the student with the highest score. Here's what I have so far:
Structure student
Dim firstName As String
Dim lastName As String
[Code]....
I heard about the IComparer thing but I didn't know how to implement it into my project.
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Nov 8, 2011
I epochly failed creating an array structure. How would I build it like I tried to do with values for each data type.
Structure PovertyGuidelines
Dim Id As Decimal
Dim NumberOfPersons As Decimal
Dim AnnualIncome As Decimal
End Structure
Private Data(20) As PovertyGuidelines
Private Id(,) As Decimal = {{1D, 2D, 3D}}
Private NumberOfPersons(,) As Decimal = {{6D, 9D, 7D}}
Private AnnualIncome(,) As Decimal = {{24000D, 32000D, 27000D}}
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Jul 23, 2009
I have to create an array of structure type in VB.net. but I am getting error while marshaling this error. I have to pass this array of structure type in to Dll function.
Code:
Structure declaration:
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _
Public Structure dx_entry
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=10)> _
Public dx As String
[Code] .....
I am getting the following error:
An unhandled exception of type 'System.ArgumentException' occurred in Audit_Demo_2307.exe
Additional information: Type dx_entry[] can not be marshaled as an unmanaged structure; no meaningful size or offset can be computed.
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Mar 4, 2010
I have a database table of company information.It's about 50 records and contains things like company id, company name, address, phone number, shipping rate1, shipping rate2,etc.I want to load that table into a structure that I can quickly search within my code.I want to search by id to find the company, and then use the company's data to update some records.My lazy way has always been to add a listbox for each piece of data, then do an indexof on the id, then access the same index on the other listboxes.[code]
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Jul 6, 2010
I want to write an extension method that works with all kinds of arrays (Integer, String, Decimal, ...). It returns an array of the same type and size as the input parameter array.[code]...
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Jan 4, 2010
how can I set the size of my integer array if it is determined at compile time?
Class Modlue
Private thisNumber() as integer
Private Sub Button1_Clicked(byval sender as object, byval e as EventArgs) Handles Button1.Click[code]......
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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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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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Jun 28, 2012
I have a structure type, as below
Code:
Public Structure StrFolder
Public isActive As Boolean
Public NameFolder As String[code]....
I would like to retrieve and print each variable name within a given structure (not its value). For example:
StrFolder(0).Name should print "isActive"
StrFolder(1).Name should print "NameFolder"
StrFolder(2).Name should print "URLIDNumber"
StrFolder(3).Name should print "DateOfFolder"
etc..
I would also like to know each type of an item within a structure. For example:
StrFolder(0).Type should print "Boolean"
StrFolder(1).Type should print "String"
StrFolder(2).Type should print "Integer"
StrFolder(3).Type should print "String"
etc..
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Apr 15, 2009
Whats the font size real meaning? since when i use Arial font size 10 in the report its gonna take different space than the textbox im using (Both using exactly same font type/size/unit) its kinda if i set 10 milimiters to the font size why would the i and M for example have so diferent size.
i wish it was like in the Notepad where all the letters take the same space. what i need its to give a certain texbox(in the report) with auto grow to have always the same lines of height but its not posible to calculate it from vb b4 being inputed to the report.
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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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Feb 7, 2012
I have the following structure:
Public Structure objKeys
Friend Shared [rsaPrivateKey] As String
Friend Shared [rsaPublicKey] As String
[Code]....
How can I check if these two variables have the same data?
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Sep 19, 2011
I have created a structure with some variables that I'm trying to update during the course of a sub routine but they are not updating, when I cycle though them at the end all the variables are still set to 0.
Imports System.Data
Imports System.Collections
Structure Team
[code]....
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Apr 18, 2012
I have this structure:
<StructLayout(LayoutKind.Sequential)>
Public Structure ContFileHeader
Public MagicID As UInteger ' 4 bytes
[code]....
Why then:
Dim header As New ContFileHeader
Debug.WriteLine(Marshal.SizeOf(ContFileHeader))
gives me 32 ? Is there a way go get 23 as the size of this structure?
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Mar 22, 2010
In VB6 I can open a file for binary read/write and then use Put and Get to write Type structures straight to disk and subsequently retrieve that information straight from disk and right back into the structure. The syntax is pretty straightforward, and it works fast and without flaw.
In VB.NET I've tried the same thing. But in absence of a "Type" variable, I've tried using Structure ... End Structure, which should basically be the same thing.The problem is, though we can write the structure to disk:
Dim FileNo as Integer
Dim FilePath as String
FileNo = FreeFile()
FilePath = "C:TestFile.dat"
[code]....
I need to create an extremely large and complex structure that will be used in a whole slough of ways, and when all work is done I need to write that structure straight to disk using a binary mode. When that information is needed again, I need to be able to get it back just the way it was saved and continue working with it again. The basic outline of the concept is illustrated above, which works--as I mentioned above--flawlessly in VB6.
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Apr 21, 2009
Im trying to load a price of an item from a prices file (Items). The variable (ItemName) is taken from a listox populated from the file on another form. And (Item) is the structure which i saved the prices information for into (Items).
What im trying to do is take the string from the listbox and change the textbox (txtCurrentPrice) text into the price for the highlighted item, which is also the name of the (txtItem) textbox.
However i cant find a way to reference the Item.(ItemName) to get the correct price from within the file, as ItemName isnt a member of the Items structure Item instance.
ChangeItemForm
Private Sub ChangeItemForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
ItemName holds the name of one of the variables saved in the structure. So say if ItemName was holding "IridescentRoll" As its string I would be trying to find Item.IridescentRoll, which would show me the price of IridescentRoll which im trying to put into the textbox. and As Item.IridescentRoll = 3.35 it would display 3.35 in the textbox.
As you have probably guessed, the Item.ItemName doesnt work ('ItemName is not a member of...'
Is there any way to write this without having to create a new record for each item? As that would take a while, and im not sure i have the time x.X
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Sep 28, 2011
I am using simple Serialize Structure to save files with some information in one file like this:
<Serializable()> Structure MyFileSystemStructure
Public FilesNames() As String
Public FilesBytes()() As Byte
[Code].....
The problem that is the result file size when saving structure of image 200KB, will be 400KB
All generated bytes after number 200 are clean (zero value).
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Mar 6, 2009
I am making a class that has a property that I want to be of type System.Drawing.Size. I don't seem to be able to reference system.drawing from within my class, and therefor can't set my property's data type to Size. Anyone know how I might do this?
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Feb 17, 2011
I'm using a Listview in VirtualMode, so I can 'add' a lot of files almost instantly. A Listview in VirtualMode does not allow sorting, so I need to sort the data myself. The data is stored as a List of Structure (it's faster to load than a List of ListViewItem). The code below works fine, but I need to sort based on multiple variables in the Structure. 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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Aug 11, 2011
I am writing a scripting language which used .net for execution. Now I have written a function which accepts an object and return a set of numeric values. I wanted user to pass any numeric array (e.g. integer,single,double,long) and I could return values in that format. I mean user can retrieve value in any numeric array type rather than specifying an array type. E.g.
[Code]...
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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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Sep 22, 2009
I have an object that I know was originally declared was an enum, but I need tothe specificnum type. I'm aware of the GetType method and it appears to work correctly, but I can't figure out how to go from there to a direct type comparison For reference types, you can use Typeof(object1) Is Class1, but this doesn't seem to work for value types.
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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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Nov 9, 2010
After gathering the Machine names on the (sealed) LAn i am then getting the ip addresses, MAc address and Macine User name of each machine on the LAn..These details will need to be accessed seperately for use in the security testing and i am unsure how best to store the active data (though eventually in a database) Am i best to create a Multidimensinal arrayList or array(bearing in mind that all the data is convereted to "String" (arrays can only store one data type??) The data found on the live network is allways changing making an array a difficult choice? I have read some tutorials mentioning making a structure with the data and storing this in an arraylist but i dont know whether this will make accessing the individual data items (ip,MAc,HostName etc) a difficult procedure?
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Mar 7, 2010
Is the integer data type is structure? And if yes what is the original code of it?
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