I am trying to do a conversion of a sting to an array name. I have a few arrays called "f2250", "f2255", "f2260" and so on. When a user enters say 2.50 into a textbox, the program needs to be able to reference the f2250 array. Now ive managed to sucessfully code the creation of the string ie "f2250(1)" (Ive added the (1) as a test to refrence an index). How can I use that string to now return the value that is in the array? Does the string need to be converted into something else?
I'm trying to convert a large array to a string, and then back into the array again after sending it over a network connection. No problems with that, but to keep my string as small as possible, I want to convert each array element into a single byte. I know that each element is going to contain a number no bigger than 100, so there will be no problems keeping them all 1 byte long. Problem is, I can't find the correct conversion commands. I think I should use 'Chr' to convert them into a string, but I can't work out how to convert that back into a number at the other end.
I want to convert an array of numbers to a string with a colon imbetween splitting it. I tried:
StringA = Join(Array(), ":")
I get the error: 'Number of indices is less than the number of dimensions of the indexed array.'I seem to get this error alot in my programming but don't exactly know what causes it. Even if I can fix this error I heard that Join only works for string arrays so this wouldn't work anyway.
I am working on a mini project that requires me to take a 8 byte hex string that I received from the Serial Port and convert it into a Byte Array and display it on the screen.An example of the string that I receive is 01050001FFFF8FFB
I am currently using the System.Text.ASCIIEncoding.ASCII.GetBytes(str) to help me achieve this. However I realised that if this does not support extended ASCII so whatever byte that is > 7F, I will not get the right value.My current code is as follows:
vb Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived Dim str As String
[code]There are 5 matches every time. I have another function that needs to use each match but as a string, not an array. I usually just use the .ToString but it is not working.
Okay I am working on a Voice Recognition Application that has a chat bot in it. When voice is recognized it converts the recognized string into an array and checks if the first or last value of the array is either computer or the Bot's Name. However, I am still very new to VB.NET only been programming in it for a few days. (I know ASP and VBscript really well though) When it goes through the check I get an exception how do I fix this? Here's my code with a comment on the line that it fails on:
Private Sub OnReco(ByVal StreamNumber As Integer, ByVal StreamPosition As Object, ByVal RecognitionType As SpeechRecognitionType, ByVal Result As ISpeechRecoResult) Handles RecoContext.Recognition Dim recoResult As String = Result.PhraseInfo.GetText 'Create a new string, and assign the recognized text to it.
So, I'm creating an array of labels. I have labels set up as: labal1 label2 label3 etc...
I've declared the array as such: Dim labelArray(5) As Label
Now, instead of assigning the labels one by one to the array (labelArray(0) = label1, labelArray(1) = label2, etc...), I was hoping to use a loop (there will be more than 5 labels). I have something like this, which obviously doesn't quite work: For i = 0 To labelArray(i) = "label" & i Next Is there a function that I can use to convert the labelName string to an object, or have vb.net see that as an object instead of a string?
I have a generic List(Of Customer). The customer class has a name, address, and phone number properties. I also have a property of another class that accepts a customer name array. I am able to do this by doing the following:
Dim names As String() Dim i As Integer = 0 'customer.GetCustomers is a List(of Customer)
[Code]....
Is there a better way to convert this to a string array?
I'm calling a Windows API that gives me a byte array which represents a unicode string - the problem is that if I call Text.Encoding.ASCII.Get String on it I just get the first letter of the string. The reason for this is that byte array has an empty byte between each character. I've verified that removing these empty bytes resolves the problem by just using a simple For loop to add the bytes that do have a value in into a new byte array, then calling Text.Encoding.ASCII.GetString on that and that gives me the full string I'm expecting.I'm just wondering if there is any easier way of getting the working string though without having to do a loop and create a new byte array etc?
I have a string of bytes which I am reading from a microcontroller via a serial port which is as follows : 02 10 18 14 CB 73 43 D3 14 00 0D 00 09 00 1B 00 04 B8 3C 00 00 24 00 30 AB
I would like to write some code to place each the bytes into an array with each element of the array consisting of one byte each.
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'm converting a pretty large chunk of code into a Class so that it can be re-used more easily, but am having a problem with one of the Methods. I have a method that uses the following line:'GET HANDLE OF ANY POPUP WINDOW ASSOCIATED WITH MAIN FORM [code]The "Me.Handle" part won't work, but I don't know what to replace it with so that it knows to use the handle of the main application's form that is using the Class.Do I need to get all Process that match my application's and store the Process' handle?
n my project i am to enter a name and a test mark into two separate text boxes and then select the button to store the information into the arrays, one array for names and another for marks, but when it is reset using the Erase <Array> fuction andi try to re enter information, no matter what information is entered i get a "Null Reference Exception Unhandled" Error.I am using Visual Basic 2008.My code is as it says from now:
Public Class frmAdverageTestMarkCalculator Dim ClosingMsg As String Dim Closingtitle As String
This seems to work OK. Upon checking f_Data is indeed filled with 8 double type numbers.
I then try to convert this system.array to a double array as follows:
For i As Integer = 0 To f_NumberOfObservations - 1
f_Measures(i) = f_Data(i + 1, 1).value Next I then get an error pointing to the line ' f_Measures(i) = f_Data(i + 1, 1).value' of type MissingMemberException was unhandled by user code'
So strings are reference types right? My understanding is a reference to the string in the heap is passed even when you pass the string ByVal to a method.
I'm converting a stream of bytes from a network packet into a specific struct, and vice versa. For example, when converting a short back and forth, my method looks like this:
myShort = buf(0) + (buf(1) * 256) or the other direction: buf(0) = myShort mod 256 buf(1) = myShort 256
When it comes to a 4 byte integer, after some experimentation I found that converting from the byte array to integer is done this way:
I am having some trouble with creating a simple function that converts a column of a datatable to an array (containing all numbers). Upon running it, it says "Index was outside the bounds of the array"; however, I couldn't understand why my function would create this problem.Also since I do not usually program using VB.Net, I am not sure if my function has other errors (like syntax errors).
I have a hexadecimal value 07A5953EE7592CE8871EE287F9C0A5FBC2BB43695589D95E76A4A9D37019C8 Which I want to convert to a byte array. Is there a built in function in .NET 3.5 that will get the job done or will I need to write a function to loop through each pair in the string and convert it to its 8-bit integer equivalent?
I'm trying to wrap up a program I wrote in VB.NET and quick. I have a device that I am connected to through a serial port (COM4). It sent me 1056 binary bytes which I have stored in an array called newRecievedData. (see code below)
********** Start Code********* Dim numberOfBytesToRead As Integer numberOfBytesToRead = myComPort.BytesToRead Dim newRecievedData(numberOfBytesToRead - 1) As Byte
I have an application which take image from a folder through system, Io.filestream and convert it into bytes and store into database as byte data format and same I retrive from database as byte format and convert it into image into datagirdview. now I want to convert it into again bytes from datagridview. How to possible the value of image in datagridview into byte format.
I am needing to write data to a usb device. The USB device uses a byte array (DataArray() as byte) to store the data. How can I assign a struct object (myStruct(0)) to the byte array. I run into the error "Value of type byte cannot be converted to 1-dimensional array of byte" when I try to cast the struct as a byte.
Ok I've tried for a while now but i cannot figure this out.I want to be able to take a text file of any size and convert it to a 2 dimensional array. Doing arrays with a set size is what i understand but i cannot figure out how to write a loop to find the size of the text file to be put into an array.
I have just started using databases, but I am totally stuck. I made a database and table using MS Access. The table has three columns. ID, Code, and Letter. Basically, the Code column stores a number for each letter (eg. 1 = A, 2 = B, 3 = C, etc.)
This table is just for reference for my program, and I don't need to change any values. But I need a step by step guide to link this table to VB 2010 and convert the values of the table to an array. For example: convert the table into the array "example" which means that example(1) = A, example(2) = B, example(3) = C and so on.
