I have a text file that I am reading from which is a list of first and last names. They are in order but they are on different lines of the text file. I am trying to read them into an array and put the first and last names together on separate lines.
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Why doesn't this work?:
Dim sarray() As String = Nothing
Dim inc As Integer = -1
For each something in something
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The following code in VBS works perfectly well.
Set objWMIService = GetObject("winmgmts:\.
ootvirtualization")
Set colItems = objWMIService.ExecQuery("SELECT * FROM Msvm_ResourceAllocationSettingData
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i am doing a small app where in one part i need to add certain lines of text ( from one variable ) to a richtexbox
i read a txt file line by line , i check something , if the condition its true then i add that line to a string variable , i need to add that variable contents to the richtexbox , i can't find the equivalent of textbox1.AppendText(textline) for the richtextbox .
I'll try to explain what i'm doing here, i wan't look through a text file, adding certain lines to an individual array element. So i want to build an array with mcode, mTitle, mCredits, mSemester, moduleStats, currentYear <--- this information as an array element. So here is my attempt at the code,
Dim sr As StreamReader = New StreamReader("datasource.txt")
Dim line = sr.ReadLine() ' get each line and store it
Dim currentYear As Integer
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I'm a complete programming nublet.I got nothing.But I'm trying to start learning. I figured the best idea was to figure out some things I'd like to be able to automate, pick some that sound relatively simple, find code that does it, and start picking it apart. I haven't found what I'm looking for on this one, so I figured I'd ask here.
What I am trying to do, is create an exe (so it can be run remotely with admin priveleges) that will read a file, determine if a couple lines exist, and if not, will write them in the correct spot in the file.
Am I being too ambitious on this? Can it be done? Can someone help me with how?
Total noobie when it comes to VB, but I'm jumping in. I have about 15 years with Business Basic and see many similar things between VB and BBx so hopefully the learning curve will not be to steep.
Anyway the project I wish to complete is: Use portable computers running Windows CE 5.0 to scan bar coded labels to capture data collected during a physical inventory. The labels have 2 fields - bin location and item. My form will have a textbox for 3 items - bin location, item and quantity. Also, the form will have 2 radio buttons to accept or reject entry. I plan on writing the records to a simple text file to import in to the current application I am running.
I downloaded Microsoft Visual Basic Express 2008 and have done a little prodding around so far. I know the Express version does not support mobile device application development so that needs to be upgraded. My question is, can someone recommend a good book that would cover the areas I need to be concerned with?
Also, any good online resources?
I'm using WinPcap to capture incoming data. Basically I'm dealing with a continuous stream of incoming data, either as byte array or as memorystream (pieces up to 64kb).
I need to check this data to see if there's a certain url and then extract it.
The url I need to find looks like this:http://201.122.38.5/data/today/798572987-589571?139805890582 The length of the 'code' after "/today/" is always the same. The IP address changes. What's the best/fastest/most efficient way to continuously check these byte arrays or memorystreams and extract the urls without hogging the CPU too much?
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below is a byte array to string encoder. It uses the yEnc algorithm that is used for Usenet binaries (Usenet only supports text).
Doing a performance analysis in VS2010 shows that this is the most CPU intensive part of the application.
The encoder function is used thousands of times, so I'd like to optimize it as much as possible.
I'm using 'ReDim Preserve' instead of 'Take()ToArray', because I'm targeting .NET Framework 2.0. Is there a more efficient way of getting only a part of a byte array?
vb.net
'Values for yEnc Encoder
Public Structure EncoderValues
Public lChar As Byte
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I can write a 1-d string array to file with:
Dim test() As String = {1, 2, 3, 4, 5}
File.WriteAllLines("C:MyFile.txt", test)
but can't see how to write a 2-d array to file.
I've tried this:
Dim test(,) As String = {{1, 2, 3, 4, 5}, {34, 22, 12, 33, 55}}
Dim myfile = File.CreateText("C:MyFile.txt")
Dim row, col As Integer
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I know there's ton of examples on the forum but i could not get it to work the way i want.
Sample CSV :-
Unused,172.22.21.2,SD103001
Unused,172.22.21.3,SD103002
Unused,172.22.21.4,SD103003
And what i wana do is change the Unused to Used so basically once this is done it will look like.
Used,172.22.21.2,SD103001
Unused,172.22.21.3,SD103002
Unused,172.22.21.4,SD103003
One thing to mention is i dont want to loop through the whole file and change all the Unused to Used. So basically software fires up opens the file and looks for Unused and changes it to Used and does the rest of the function and shuts down. Next time the software is fired up it goes through and does the same thing.
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Ok, so someone I know said in order to do this, I need to do WebRequests.So I have this site for example: [url]Say I want to post to that textbox("Hello"), then I want to click the button. So far, this is all I know [url]
View 3 RepliesI'm trying to get a string from a byte array previously read from memory
i can get the string like this
dim mem as string= ASCIIEncoding.ASCII.GetString(memory) or dim mem as string= UTF8Encoding.UTF8.GetString(memory) but when i try to concatenate this with another string i get a strange result dim result as string = "this is you memory string " & mem & " problem string" no matter what comes after mem in the concatenation it seems like it is not there when in fact it is because when i try this (mem has two chars in it) dim result as string = "this is you memory string " & mem(0) & mem(1) & " problem string" problem string appears so what i assume is that there are some vbCrLf chars in the string after reading (or is it from the conversion?)
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What am I doing wrong or do I use a incorrect way to extract text from an array? Using += takes up a lot of computing power when it reaches like 50000 characters so I want a method with much better performance
Administrator Console I am Making a Noob-Proof GUI Administration Control Panel,and I Have,Log Off User Shutdown (With User Selected Amount Of Time)Quick Shutdown (Shell ("shutdown -s -t 00") )Reboot Computer and I Need the following:
-Disable TaskManager
-Disable Command Prompt
-Disable internet
-Disable My Computer
-Disable Regedit
my code is :
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The error is Value of type '1-dimensional array of string' cannot be converted to 'String'.
I have an array of people stored in a custom structure array... how can i copy this array to a temp array so that the temp array has all the same values as the original custom array?
View 4 Repliesi have an array contains a-z.Then i have a textbox and when click on the button, it will replace the text inside the textbox to the index number of the array.Example, from "abc" will become "0 1 2" The code below do the job.how to do so that i can replace the text inside the textbox from "0 1 2" back to "abc" based on the array?
Dim txtKey As String = readKeyTxt.Text
readKeyTxt.Text = ""
For Each b As String In txtKey[code].....
I need to append STRINg to Array and cast it 1-dimensionalArray
Dim remoteFileNames(0)
As
String
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Here "FtpRemoteDirectory" is a string and ftpFileNames() is the Array String which list the FileNames.
and remoteFileNames is 1-dimension array
I am writing an OPC Client in VB.NET (2008) and I am using an OPC wrapper from Graybox. I am having some problems with the data types. I have an Array of String that contains all of the OPC Items that I wish to read from the OPC Server. When I attempt to use the Array of String, Option Strict causes the following compile error message:Error 5 Option Strict On disallows narrowing from type 'System.Array' to type '1-dimensional array of String' in copying the value of 'ByRef' parameter 'ItemIDs' back to the matching argument. How do I pass the Item ID's (all strings) in an array?
View 1 RepliesI'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
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I have an array defined As string and the value stored in site is like "7E", "A1" and so on. But in order to send out this array through serial port. I need to change the the array to As Byte instead of using As String. How can I convert it?
View 8 RepliesI've been working with a sig capture application sample on a windows mobile device, The data is sent via IP to a host as a byte array and is then drawn onto the screen of the host as it appeared on the client. I was able to get this into the form of a bitmap object so I could print it or save to a jpg file. That all works well. The problem now is that I need to store this data in a database and then be able to recall it at a later time and recreate the signature image.
The byte array data is much smaller than the actual image so I would like to store it in that form. My issue is that when I convert this byte array into a string and back again my program can no longer re-create the image. Once I saw the problem I created the code below as a test and added the msgboxes to get an idea what was happened to my data.
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i have 2 string arrays and I want to merge them together then put the elements into a third string array ..
for an example :
string1="a","b","c"
string2="d","e","f"
after merging:
string3="a","b","c","d","e","f"
Im working on a program and I get this "Value of type '1-dimensional array of String' cannot be converted to 'String'." heres the code that gets this error:
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I don't understand why the line final.join etc pops up with these errors!! Value of type 'String' cannot be converted to '1-dimensional array of String' And Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated This is my code.
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I want the Function to accept List(Of String), Array & String and similarly return List(Of String), Array & String respectively. The Function simply adds a string (month) to the input collection. I just want to use it for string, array and list with needing to think of conversions.
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I need to do this to every line in a file and save the # five Element in an array. I keep getting (error code 1 Value of type '1-dimensional array of String' cannot be converted to 'String'.)
NOTE: if I change ( Dim Lineoftext(1) to Dim Lineoftextt works) (It does't seem to work with arrays)
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I am trying to the copy the value from string to char array using String.CopyTo() method.
Here's my code
Dim strString As String = "Hello World!"
Dim strCopy(12) As Char
strString.CopyTo(0, strCopy, 0, 12)
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Edit : I get the this error at runtime.ArgumentOutOfRangeException Index and count must refer to a location within the string. Parameter name: sourceIndex
Try
Dim authTicket As FormsAuthenticationTicket = _
FormsAuthentication.Decrypt(authCookie.Value)
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Error1Value of type 'String' cannot be converted to '1-dimensional array of String'.C:xxx