I'm trying to write some of my own linear algebra methods, and I'd like them to work independent of the number of dimensions of the array. However, there doesn't seem to be any generic method, that I can see, for looking up a particular element in an array of arbitrary size. I mean I could write code to find the rank and then use (), (,), (,,), (,,,), etc, but that seems rather cumbersome.
View 4 RepliesI'm upgrading my VB6 project to VB.NET and I found one of the problem below relating to dimensional array.Here's my VB6 coding :
Private Function ConvertMatrixToBase0(ByVal MyMat() As Double) As Double()
Dim i, j As Long
Dim ConvMat() As Double[code.]...
When i port it over to VB.NET, i encountered error message 'ReDim' cannot change the number of dimensions of an array. for the line highlighted in red. And I suspect that VB.NET need to always define the exact dimension of the array during the declaration. But for the function above, for the array of 'MyMat()', I do not know what is the exact dimension every time it runs, and that is why i need to check the dimension of the array.My question is do we have any solution in dealing unknown dimension array in VB.NET? As in VB6, we can just define Array() instead of Array (,) in VB.NET.
I have the following function,
Dim results() As Object = Me.Invoke("webdirect", New Object() {Company, LocationCode, CustomerNumber, OrderNumber, OrderRef, OrderDate, WebLines})
o_Company = CType(results(1),System.Nullable(Of Integer))
o_LocationCode = CType(results(2),String)
o_CustomerNumber = CType(results(3),String)
[Code] .....
So the return type of this function is a string, but I would like to get it back to its original form so I can access the individual sections i.e. o_LocationCode,o_CustomerNumber, etc how can I do that ?
Entire functions looks like this
Public Function webdirect(<System.Xml.Serialization.XmlElementAttribute(IsNullable:=true)> ByVal Company As System.Nullable(Of Integer), <System.Xml.Serialization.XmlElementAttribute(IsNullable:=true)> ByVal LocationCode As String, <System.Xml.Serialization.XmlElementAttribute(IsNullable:=true)> ByVal CustomerNumber As String,
[Code] .....
Called like this
Dim returnArray As String
returnArray = client.webdirect(10, "123", "123", "123", "147", "2011-11-1", webLinesArray, 10, "", "", "", "", "", webRespArray)
No errors on run time but the string seems to be just blank, thats why i was wondering how I convert the string back to the array so I can access the individual elements.
I've managed to get my CSV file opened and the individual elements of each line read into an array. I've also managed to count and list the number of elements in the first row (i.e. the column headers).
[code]...
listOfNewFileRecords.Add(currentRow)' ADD EACH RECORD TO THE LIST AS THE FILE IS BEING READ Now the next stage is to access various cells within the whole opened file, so that I can condition/modify the text.So does 'ListOfNewFileRecords' have a way/method of accessing a particular element, in each record of the 'List'? I've tried using the intellisense, but can't make enough sense out of it to get anything to work.
how to search XML trees with LINQ using VB.net. I've found some very helpful posts for C#, but none for VB.net?How would I use LINQ to XML to get the value from example XML Getting a set of elements using linq How to get elements value with Linq To XML I want to get the inputlocation for the process where name = "MyProcess1" Based on the example links above, I have been trying code like this:
Dim inputLocation As String = xdocument.Descendants("Configurations").Descendants("process").First(Function(c) c.Element("name").Value = "MyProcess1").Element("inputLocation").Value
But the code is not returning any values. here is the xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Configurations>
<process>
[code]....
I am trouble in sorting 2 dimensions array in vb.net. One row has 5 columns. Original array have 3000 rows.How can I get the effective sorting with pdtId. I tried to find googling, cannot get the right answer to me.
(0, 0) = pdtId "string"
(0, 1) = brand name
(0, 2) = category Id
(0, 3) = url
(0, 4) = date
[Code]...
I wounder if there is a way to get the values from array's dimensions, without knowing how many dimensions the array has.I know how to do if I know the array's dimensions, but not a clue if I don't
know the array's dimensions.
[Code]...
Public Sub LoadFromFile()
Dim sr As New StreamReader("CoverageArea.dat")
Dim strAreaLine As String[code].....
I have a question about that strAreaInfo()...I left the () with no number in it so that it wouldn't have a set # of values, and then I tried to give it 3 values, but I get the error in the title. Am I doing something wrong when I declare it?
I have an array declared:
[Code]...
This statement works fine in ASP, but when I switch to ASP.Net, it give errors 'ReDim' cannot change the number of dimensions of an array.
After user entered a value into textbox (for example 4), datargidview must be create automatically(number of datargidview's columns and rows must be textbox value). And, user enter some values that among 0 and 1 into datagridview's cells. So i want to assing these values (values that are written in datgridview cells). For example, if user enter 0.25 in datagridview's cell 1, and 0.34 cell 2, 0.67 cell 3, and etc, in this instance array(1,1)=0.25, array(1,2)=0.34, array(1,3)=0.67 must be assigned. i hope, i could understand :) i illustrate this example below. i want to assign such as indexs that is written into following example table.
View 1 RepliesI have this recently converted application from vb6 to vb.net 2008. One of the errors stated is:'Point' is not a member of 'System. Windows. Forms. PictureBox'.I have searched and not found an alternative to this.Also, it says ReDim cannot change the number of dimensions in an array.
View 8 RepliesHere's my json:
{"d":{"key1":"value1",
"key2":"value2"}}
Is there any way of accessing the keys and values (in javascript) in this array without knowing what the keys are?
The reason my json is structured like this is that the webmethod that I'm calling via jquery is returning a dictionary. If it's impossible to work with the above, what do I need to change about the way I'm returning the data?
Here's an outline of my webmethod:
<WebMethod()> _
Public Function Foo(ByVal Input As String) As Dictionary(Of String, String)
Dim Results As New Dictionary(Of String, String)
[Code]....
I have a multidimensional array which will hold 3 bits of value and value will be added through a loop by reading from db. When it come this line of code:
*MenuAccess(.Fields("GROUPNO").Value, .Fields("ITEMNO").Value, .Fields("SUBITEMNO").Value) = OKNO*
It's hitting error, 'Object reference not set to an instance of an object.'
Public MenuAccess(100, 30, 50) As Boolean
Private Sub RtGetMenu_Access()
Try
[Code]....
Hi can someone show me an example of a multidimensional associative array in vb.net. Need array to hold peoples name, there age and a few other settings. Want to be able to use a Dictionary to use People.Add.
View 1 RepliesI've got a 3-dimensional array that I'd like to clear.
View 1 RepliesI'm writing a game in visual basic 2008 and things are going fairly well with it for the most part.. well until today.. I can declare a 1 dimensional array of a class just fine but cannot for the life of me get the syntax right for a multidimensional array. I usually don't have many issues in writing in VB but this is the first large scale program I have ever written in VB2008 and the 1st large scale uses of classes in VB as well
Here is my code to better illustrate my problem here is the class..minus most of the properties Public Class Objectives private zone as Integer private TZone as integer Public Property TargetZone As Integer Get Return TZone End Get Set(ByVal value As Integer)
[Code]...
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.
View 1 RepliesI am writting a vb.net program that I want to read in data from Excel and then populate a multidim array with it.I have been able to import the Excel data into a DataGridView (haven't been able to go directly to an array). Now I am trying to loop through the DataGridView to populate the array.This is were I am having troubles.[code]
View 2 Repliesvb.net 2005.
I have profitMarginArray(29,3) <29 is actually a variable, but figured I'd put in a number for the example> and what I need is to retreive elements 0 and 3 sorted on 3 in some way shape or form. The biggest problem is element 3 isn't unique so there could be 5 that have the same value (56.34 for instance) so a sorted list is out.
The current array could look something like
Item1, .34, .75, 54.67
Item2, .32, .75, 57.33
Item3, .29, .5, 42
[Code]....
Is there at all a way to sort (numerically) a multidimensional array?
I have an array that is as follows `dim points(23,1) as String`
The first dimension of the array has the players names in, the second dimension of it has their cumulative points, so I want to sort the array by points and maintaing the correlation of players name to points
* I posted this in VB forum at first by accident instead of .Net* I am trying to create a console application that computes the row and column sum and prints the elements with the resulting sums for each row and column.
[Code]....
My column sum code is currently showing the row sums. I need the column sums to display in descending order. So i know it would require a sorted array, but i'm not sure how to go about doing that given i can't get the correct values to show up. So I would need it to display as "Column sums are 12, 20, 13, 24, 51. " and then the next line would be "Column indexes are 1, 3, 2, 4, 5."
The code below is the entire class that has the error in it... the errored code is highlighted in red. The error is,'ReDim' cannot change the number of dimensions of an array.
Code:
Public Class clsMap
Dim SR As System.IO.StreamReader
Public Width As Integer
Public Height As Integer
[code]....
I'm trying to build up a multidimensional array which will hold two bits of info for each record in a database e.g. id, description.[code]...
View 2 RepliesI need to count number of repeating and position where they repeat of all number in multidimensional array like this:
1 2 1
1 1 2
2 3 1
And result need to be:
Number 1- two times on position 1, one time on position 2, two times on position 3
Number 2- one time on position 1, two times on position 2, one times on position 3
Number 3- 0 on position 1, one time on position 2, 0 on position 3
if i have a multidimensional array:
dim test(,,) as string
how can i loop through the array to find if another variable is contained in the second dimension of the array
dim x as integer = test.indexof(OtherVariable)
obviously above won't work
If I have the following array:
Dim Array(4, 10) As String
Array(0, 0) = "100"
Array(0, 1) = "200"
[code]....
How do I get the following count:
0 = 2
1 = 4
I can't seem to get the code structure I'm looking for when importing a csv file into an array. The CSV format in question is 69 columns, and unknown rows since it depends on the time length of the data capture. Over the past 3 days I have tried many methods and can output it all to a listbox, as shown below (column headers appear in order), however when I try to put it into an array it only reads the first column. Am I missing something in the declaration of the array, or do I need to use an arraylist? Every permutation doesn't seem to get the results I seek, or I just plain crash the program.
[Code]...
I have a 2 dimensional array and also a 2 column listview box. I am able to insert array (0,i) into column A, but i do not know how to insert Array(1,i) into column B.
[Code]...
I am trying to make a jagged array that has,
3 columns
with 5,4,4 rows respectively
that each have 2 rows
that have a varying number of rows, for example 6,9,5,6,4 I have the first part setup but I don't know how to get to another level of the jagged array.
Dim potentialStructure()() As Short = {New Short() {0, 1, 2, 3, 4}, New Short() {0, 1, 2, 3}, New Short() {0, 1, 2, 3}}
And how would I access an element at say, the lowest level?
I have a multidimensional array (not jagged array) that saves data from rows and columns of an excel spreadsheet. After it completes recording the data from Excel, I need to pass the array to another function.I understand how to pass a jagged array, but not a true multidimensional array.
Can someone point me in the right direction? I've done some searching on this site, and others, but most of the info only includes single dimension arrays or jagged arrays.