I read a line from a text file with text as "ABC.txt", "XYZ.txt", "TEST.txt".I use code file = sr.ReadLine(); to assign the text to variable file. Now I want to initiate a string array likestring[] FileNames = {file}; it doesn't work. What should I do?
View 2 RepliesHow would I create a list of elements in VB.NET, save it to a .dat file, and make Ruby re-create such list (as an array) with such elements (they will be strings, booleans and integers)?
View 2 RepliesI have a program that continuously reads in hex values as part of an rfid reader. My question is: How would I write code that detects when this changes? i.e. I have a visual basic textbox that is continuously updated as so:
[Code]...
And it points to the name of my form. This occurs at the "newArray(p) = strangeCardNames" line of code. If anyone else has an idea for how I can either fix this or another method to detect a change and store it in a variable,
I have the following code to display filenames in a gridview. the variable filename contains the filenames that are present in a folder. now i want to store these filename values into a string array for further usage.[code]
View 2 RepliesI want to put all elements of a String array into a Queue(Of String). I have following code which using For...Each to put string into Queue(Of String):
Dim Files() As String = OpenFileDialog1.FileNames
'OpenFileDialog1 is an instance of OpenFileDialog control
Dim PendingFiles As New Queue(Of String)
[code]....
Is that possible to do it (i.e. put string array into Queue(Of String)) without using For...Each?
Let's say I have regular string called tempstring, and I want to change a specific item in that string. Like if tempstring = ";1;2;3" and I want to change the "2" to "Baboon." Here's my best solution on how to do it:
vb
Tempstring = ";1;2;3"
'Datasplit tempstring
Dim datasplit As String() = Tempstring.Split(New Char() {";"c})
[Code]....
This works, however, it feels a little heavy. Is there an easier way to do this? Perhaps a way to directly replace datasplits without readding them all to another string one by one using a loop?
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 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"
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 have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")
Else
[CODE]...
I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.
I am trying to write a program that reads values from a datafile and makes the data available in an array for further use in the program. The data consist of a description and then a value (COM_PORT=COM1, for example). My idea is to put the data in an array so that I can just search the array for COM_PORT and I will get COM1 back. Is that a good approach of handling it this way? What methods would I use to put the data (I use FileSystem.ReadAllText, the data is in a string) into an array? Would the split method work?
View 2 RepliesI have two lists of strings. One is a list of all students in a class and the other is a list of students in the class that completed an assignment. The two lists are part:whole. So we have two loops for copying elements and displaying them in a list box for only the students who did submit.
Dim f As Integer
f = 0
Dim h As Integer
h = 0
While (usersinclass.Count > f)
h = 0
While (usersidthatsubmittedassingments.Count > h)
[Code] .....
What I need is the remaining portion of the "usersinclass" list. (i.e. The students who did not submit). I tried an Else statement BUT with nested loops, every element is guaranteed not to match at least once, so I was getting elements that shouldn't be there. So, is there anyway to run the given lists against each other again to pull out the remaining students? (preferably with no repeats).
I'm trying to read the XML I generated. Here's my writing code:
'XML EXPORTATION BEGIN
'Create the file
Dim myXmlTextWriter As XmlTextWriter = New XmlTextWriter("C:Simple TimerProfiles" + timer_name + ".xml", System.Text.Encoding.UTF8)
'Choose Formatting
myXmlTextWriter.Formatting = System.Xml.Formatting.Indented
[Code] .....
I can't figure out the syntax for searching an array of stored words for a string matching an input string. I understand the pseudocode of it, but I'm tripping up over what variables I need to put where, and how they should be formatted. More than happy to provide more details should anyone request them.
[Code]...
what method should I be using to obtain all the form input elements during an httpwebresponse?I know that posting back to them can be done via editing the response using textbox1.text...but how can I obtain the input values during my request without having to manually go behind the scenes and peek at the html code?
View 1 RepliesI've got myself a CSV file with the following contents:
1,The Compact,1.8GHz,1024MB,160GB,440
2,The Medium,2.4GHz,1024MB,180GB,500
3,The Workhorse,2.4GHz,2048MB,220GB,650
It's a list of computer systems, basically, that the user can purchase.I need to read this file, line-by-line, into an array. Let's call this array csvline().The first line of the text file would stored in csvline(0). Line two would be stored in csvline(1). And so on. (I've started with zero because that's where VB starts its arrays). A drop-down list would then enable the user to select 1, 2 or 3 (or however many lines/systems are stored in the file). Upon selecting a number - say, 1 - csvline(0) would be displayed inside a textbox (textbox1, let's say). If 2 was selected, csvline(1) would be displayed, and so on.
It's not the formatting I need help with, though; that's the easy part. I just need someone to help teach me how to read a CSV file line-by-line, putting each line into a string array - csvlines(count) - then increment count by one so that the next line is read into another slot.So far, I've been able to paste the numbers of each system into an combobox:
Using csvfileparser As New Microsoft.VisualBasic.FileIO.TextFieldParser _
("F:folderprogramnameprogramnameinDebugsystems.csv")
Dim csvalue As String()[code]......
But this only selects individual values. I need to figure out how selecting one of these numbers in the combobox can trigger textbox1 to be appended with just that line (I can handle the formatting, using the string.format stuff). If I try to do this using csvalue = csvtranslator.ReadLine , I get the following error message:
"Error 1 Value of type 'String' cannot be converted to '1-dimensional array of String'."
If I then put it as an array, ie: csvalue() = csvtranslator.ReadLine , I then get a different error message:"Error 1 Number of indices is less than the number of dimensions of the indexed array."
Structure systemstructure
Dim number As Byte
Dim name As String[code]............
I've come up with the following and it's partly working.
Public serial1, serial2, serial3, serial4, serial5 As SerialPort
Public serialports() As Object = New Object() {serial1, serial2, serial3, serial4, serial5}
dComPort = "COM4"[code]....
The above code works fine! But im having trouble trying to now retreive whats stored in the array.In the above example, an entry will be stored in serialports(4), all other array elements will be blank.If I do this it works.
MsgBox(serialports(4).PortName) ' this retuns the value COM4
But I'd like to loop though all array elements and print out ALL the PortNames, The below code doesnt work, I get an error Object variable or With block variable not set.
For i = 0 To serialports.Length - 1
MsgBox(serialports(i).portname)
Next
Assume I have an array myArray1 = { A, B, C, D, E, F, ., T}I have another that contains a subset of the elements of myArray1 but where the order may vary
View 3 RepliesI'm migrating from VB6 to VB.NET, in hence my questions below:
I have to write a function that returns array of strings.
How can I initiate it to empty array? I need it since I have to check if it's empty array after it returns from this function.
Is list of arrays better for this purpose? If I use a list - Is it empty when it firstly defined? How can I check it it's empty?
I feel quite silly asking this, but I couldn't find a definite answer anywhere. in vb.net, how are the array elements defined (if they are defined) for, for example:
Dim myarray(5) as int
does, at this point in time, myarray(3) for example have a defined value? If so, what is it?
check if array consist of only elements from another array
View 3 RepliesI have a one-dimensional array that has one number per element. I also have a variable number, var. I need to take the number of elements from the first array that equals the var and put it into a second array with commas between the numbers. I would also like to have a title element in the second array. [Code]
View 4 RepliesI am new to VB and seeking to create a visual basic program which controls the display of several on-screen elements depending on a single value input by a user. The user can enter anyone of 2500 values and depending on the value entered, five different display elements on the screen will change color or text. The program's response to a given input value never changes, in other words if the user enters 279, the five different display items will always be the same. However, there is no real pattern to the display items that would allow for programming an anticipated response to the input value.
My thinking is to create a large and ponderous "lookup table" in visual basic - I am assuming this an be done but perhaps there is a different or better method. I plan on creating the lookup file in Excel but was assuming I'd need to export it to something that VB could easily read. Any suggestions on the best way to do this? Does the lookup table reside as a separate .txt files someplace or something like that? [Code]
Dim str As String
Dim str2 As Array
str = "blabla duhduh"
str2 = str.Split(" ")
I have a list of strings. For each string in that list, I want to prepend another string. I wrote a method to do it, but I was wondering if there was something already in .NET I could use to do this. It seems like something that could be built in, but I was not able to find anything.
Here is the method I wrote:
Private Function PrependToAllInList(ByRef inputList As List(Of String), ByRef prependString As String) As List(Of String)
Dim returnList As List(Of String) = New List(Of String)
For Each inputString As String In inputList
returnList.Add(String.Format("{0}{1}", prependString, inputString))
[code].....
It works, but I would rather use built in functions whenever possible.
I have tried a few things like converting HTML to XML and then using an XML navigator to get input elements but I get lost whenever I start this process.What I am trying to do is to navigate to a website which will be loaded using textbox1.text.Then download the html and parse out the input elements like . username, password, etc and place the element by type (id or name) into the richtextbox with the attribute beside the name.[code]Any clues or how to properly execute an HTML to XML conveter, reader, parser?
View 2 RepliesI am trying to add the values in my array.. and this is my code
dim totals(6) as decimal
public function AddIBNRTotal(byval Amt as decimal,srvcdesc as string) as decimal
if srvcdesc = "ZZ_TOTAL" then
[Code]....
I know the addIBNRfunction works fine cause it is displaying the correct amounts in my textbox
but when i call the Sumnumber() i am getting 70000 dollars short...
So is this the right way to add values or elements to a array...
How would you code this so that it adds up the first column, and then the second column?
Dim intSales(,) As Integer = {{100000, 150000}, _
{90000, 120000}, _
{75000, 210000}, _
[Code].....
I am trying to create a array and then add elements to it based on some conditions and then add the elements in the array and display it...
but i am getting a larger number that expected..
this is my code
Dim IBNRTotal as decimal
dim element as integer
dim totals(6) as decimal -- create a array3
[Code]....
i know the amt value correct cause in return amt.. i am seeing the right value but somehow when it goes to the array and when i add the whole thing it doesnt seems right...
I am just starting VB at 60 years old and with no programming experience and nobody to ask for help...except here, of course. So needless to say I am hitting brickwalls. I am using "Murach's Visual Basic 2008" and it seems to be a good book. This is what I am up to I have to declare an array with 5 elements with an index. I think that part is OK. Then add code that adds each element to the next one every time a user clicks a button. I have had many tries but the best I can get is just the grand total of the elements. Here is the code I came up with:-
[Code]...
Is anyone able to show me how the button click would reveal a progressive total of the elements each time a user clicked on it? It would be good if the book came with answers or had a forum for their readers.