Apply Change To Instance Of Structure Within Array?
Nov 5, 2011
So I have an array which holds instances of a structure. The structure contains various string properties.
I'm looking to modify each instance of a structure within this array by doing the following:
For Each stuInstance As StuInstance In arrStuInstances stuInstance.strCarName = "Benz"
But I found that this in fact fails to really change it permanently. If I do the following loops in the given order:For Each stuInstance As StuInstance In arrStuInstances
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
I have a 2d array and I want to do a calculation on each element in the array and then return the index which results in the smallest value.
I have tried iterating through each element in the 2d array and running the calculation. If the calculated result is smaller than the currently stored minimum I set that to the minimum.
This works but it runs so slowly it makes the solution a non starter. It performs each calculation quickly but because of the number of elements in the array the calculation for the whole array is stupidly long.
I just change the country from "US" TO "French(Canada)" through control panel, then run the code.But the display name is still as "English(United States)", if I shut down the app then restart it. The name becomes "French(Canada)" then.Why?
If (System.Threading.Thread.CurrentThread.CurrentCulture.DisplayName) = "French (Canada)" Then ' do something
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.
When you change some date or time settings in Regions and Languages from Control Panel, Windows will apply and refresh the Notification Area right now. Now i change some date setting from Registry and want Explorer refresh right now, using the API SHChangeNotify, like below
viewManager.DataViewSettings(tableFoood).RowFilter = ""viewManager.DataViewSettings(tableFoood).RowStateFilter = DataViewRowState.OriginalRows viewManager.DataViewSettings(tableFoood).RowFilter = "ftype=" & type & "" In table food, I have different type of food, according I want to display in datagridview but dataview on first time show content of food, not change content in grid.
I was knowing that For Each loop can only be applied to those classes that implement IEnumerable interface . But recently i accidentally wrote a code that is using For Each on my class's objects collection and my that class is not implementing IEnumerable interface .Below is the sample code that i am testing on :
Sub Main() Dim personList() As Person = New Person(2) {} personList(0) = New Person("s1", "s2")
Public Class frmMain Private strSpark() As String = {"PR214","PR223","PR224","PR246","PR247","PR248","PR324", "PR326","PR444"} Private strBrands As String(,) = { { } } End Class
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?
How do I change the program path '"logic.txt", "G:"' in the code below to the OpenFileDialog.FileName? Cos when I tried it, I receive String conversion errors and I tried altering the codes but it didn't work out well. [code]...
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?
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]....
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.
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.
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
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 ?
I am using asp.net with vb for my scripts.I want to use an array of a Structure to store data parsed from an xml file.[code]All appears to work fine until I add the code that is in bold, I then get the Object reference not set to an instance of an object.
I have a question: How can I make a function or sub run inside a structure when a variable in this structure changes? As example I have this function: Public Structure Texture Sub New(ByVal TexturePath As String) Me.Path = TexturePath Me.Image = LoadImage(TexturePath) End Sub Public Path As String Public Image As Image End Structure
And somewhere this happens: Dim t As New Texture("path ooldfilename.tga") t.Path = "path o ewfilename.tga" I want it to automatically load the image when the "Path" variable changes. Is the only solution making an extra sub and run that? It would really decrease my code size if it changes on variable change.
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.
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
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.
