I was just wondering if a Web Service can save something i send to it as a string without resetting it everytime i call the WS?
<WebMethod()> _
Public Function sendLCDBrightnessLevel(ByRef command As String) As String
'This reads a number for the LCD brightness level and store it
'The phone will call this function every 5 minutes to see what the value is
'android phone->WS
Dim lcdLevel As String = ""
If command <> "READ" Then
lcdLevel = command
Return "Stored: " & lcdLevel
Else
Return lcdLevel
End If
End Function
Would lcdLevel retain the value in command if the app just checks it?
Example:
I send it 30 for the command and since its not READ it stores it in lcdLevel. Once the Android phone gets around to the "every 5 minutes" check, will it read 30 or will it be nothing?
I'm thinking that i need to move Dim lcdLevel As String = "" outside the function since its at the start of the function call each time? Do i just need to place that outside the function in order to keep the value stored or is there something else i also need to do?
Thanks!
<WebMethod()> _
Public Function sendLCDBrightnessLevel(ByRef command As String) As String
'This reads a number for the LCD brightness level and store it
'The phone will call this function every 5 minutes to see what the value is
'android phone->WS
Dim lcdLevel As String = ""
Dim path As String = "c:\temp\lcdValue.txt"
If command <> "READ" Then
lcdLevel = command
Dim objWriter As New System.IO.StreamWriter(path, False, Encoding.UTF8)
objWriter.WriteLine(lcdLevel)
objWriter.Close()
Return "Stored: " & lcdLevel
Else
Dim objReader As New System.IO.StreamReader(path, Encoding.UTF8)
lcdLevel = objReader.ReadToEnd
objReader.Close()
Return lcdLevel
End If
End Function
Guess this is the only way to store a value easily in a WS?
Seems to work as i needed it too.
Related
I want to calculate the number of words in a text file using a delimiter of a space (" "), however I am struggling.
Dim counter = 0
Dim delim = " "
Dim fields() As String
fields = Nothing
Dim line As String
line = Input
While (SR.EndOfStream)
line = SR.ReadLine()
End While
Console.WriteLine(vbLf & "Reading File.. ")
fields = line.Split(delim.ToCharArray())
For i = 0 To fields.Length
counter = counter + 1
Next
SR.Close()
Console.WriteLine(vbLf & "The word count is {0}", counter)
I do not know how to open the file and to get the do this, very confused; would like an explanation so I can edit and understand from it.
You're going to be reading a file as the source of the data, so let's create a variable to refer to its filename:
Dim srcFile = "C:\temp\twolines.txt"
As you have shown already, a variable is needed to hold the number of words found:
Dim counter = 0
To read from the file, a StreamReader will do the job. Now, we look at the documenation for it (yes, really) and notice that it has a Dispose method. That means that we have to explicitly dispose of it after we've used it to make sure that no system resources are tied up until the computer is next rebooted (e.g there could be a "memory leak"). Fortunately, there is the Using construct to take care of that for us:
Using sr As New StreamReader(srcFile)
And now we want to iterate over the content of the file line-by-line until the end of the file:
While Not sr.EndOfStream
Then we want to read a line and find how many items separated by spaces it has:
counter += sr.ReadLine().Split({" "c}, StringSplitOptions.RemoveEmptyEntries).Length
The += operator is like saying "add n to a" instead of saying "a = a + n". The {" "c} is a literal array of the character " "c. The c tells it that is a character and not a string of one character. The StringSplitOptions.RemoveEmptyEntries means that if there was text of "one two" then it would ignore the extra spaces.
So, if you were writing a console program, it might look like:
Imports System.IO
Module Module1
Sub Main()
Dim srcFile = "C:\temp\twolines.txt"
Dim counter = 0
Using sr As New StreamReader(srcFile)
While Not sr.EndOfStream
counter += sr.ReadLine().Split({" "c}, StringSplitOptions.RemoveEmptyEntries).Length
End While
End Using
Console.WriteLine(counter)
Console.ReadLine()
End Sub
End Module
Any embellishments such as writing out what the number represents or error checking are left up to you.
With Path.Combine you don't have to worry about where the slashes or back slashes go. You can get the path of special folders easily using the Environment class. The File class of System.IO is shared so you don't have to create an instance.
Public Sub Main()
Dim p As String = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "Chapters.txt")
Debug.Print(Environment.SpecialFolder.MyDocuments.ToString)
Dim count As Integer = GetCount(p)
Console.WriteLine(count)
Console.ReadKey()
End Sub
Private Function GetCount(Path As String) As Integer
Dim s = File.ReadAllText(Path)
Return s.Split().Length
End Function
Use Split function, then Directly get the length of result array and add 1 to it.
I'm working on a Timer program, that allows the user to set up a timer for each individual user account on the computer. I'm having some trouble writing the settings to a text file and reading from it. I want to know if it's possible to write it in this fashion --> username; allowedTime; lastedLoggedIn; remainingTime; <-- in one line for each user, and how would I go about doing that? I also wanted to know if it's possible to alter the text file in this way, in the case that there's already an entry for a user, only change the allowedTime, or the remainingTime, kinda just updating the file?
Also I'm also having trouble being able to read from the text file. First of all I can't figure out how to determine if a selected user is in the file or not. Form there, if the user is listed in the file, how can access the rest of the line, like only get the allowedTime of that user, or the remaining time?
I tried a couple of ways, but i just can't get it to do how I'm imaging it, if that makes sense.
here's the code so far:
Public Sub saveUserSetting(ByVal time As Integer)
Dim hash As HashSet(Of String) = New HashSet(Of String)(File.ReadAllLines("Settings.txt"))
Using w As StreamWriter = File.AppendText("Settings.txt")
If Not hash.Contains(selectedUserName.ToString()) Then
w.Write(selectedUserName + "; ")
w.Write(CStr(time) + "; ")
w.WriteLine(DateTime.Now.ToLongDateString() + "; ")
Else
w.Write(CStr(time) + "; ")
w.WriteLine(DateTime.Now.ToLongDateString() + "; ")
End If
End Using
End Sub
Public Sub readUserSettings()
Dim currentUser As String = GetUserName()
Dim r As List(Of String) = New List(Of String)(System.IO.File.ReadLines("Settings.txt"))
'For Each i = 0 to r.lenght - 1
'Next
'check to see if the current user is in the file
MessageBox.Show(r(0).ToString())
If r.Contains(selectedUserName) Then
MessageBox.Show(selectedUserName + " is in the file.")
'Dim allowedTime As Integer
Else
MessageBox.Show("the user is not in the file.")
End If
'if the name is in the file then
'get the allowed time and the date
'if the date is older than the current date return the allowed time
'if the date = the current date then check thhe remaning time and return that
'if the date is ahead of the current date return the reamining and display a messgae that the current date needs to be updated.
End Sub
edit: I just wanted to make sure if I'm doing the serialization right and the same for the deserialization.
this is what i got so far:
Friend userList As New List(Of Users)
Public Sub saveUserSetting()
Using fs As New System.IO.FileStream("Settings.xml", IO.FileMode.OpenOrCreate)
Dim bf As New BinaryFormatter
bf.Serialize(fs, userList)
End Using
End Sub
Public Sub readUserSettings()
Dim currentUser As String = GetUserName()
Dim useList As New List(Of Users)
Using fs As New System.IO.FileStream("Settings.xml", IO.FileMode.OpenOrCreate)
Dim bf As New BinaryFormatter
useList = bf.Deserialize(fs)
End Using
MessageBox.Show(useList(0).ToString)
End Sub
<Serializable>
Class Users
Public userName As String
Public Property allowedTime As Integer
Public Property lastLoggedInDate As String
Public Property remainingTime As Integer
Public Overrides Function ToString() As String
Return String.Format("{0} ({1}, {2}, {3})", userName, allowedTime, lastLoggedInDate, remainingTime)
End Function
End Class
edit 2:
I'm not too familiar with try/catch but would this work instead?
Public Sub readUserSettings()
If System.IO.File.Exists("Settings") Then
Using fs As New System.IO.FileStream("Settings", FileMode.Open, FileAccess.Read)
Dim bf As New BinaryFormatter
userList = bf.Deserialize(fs)
End Using
Else
MessageBox.Show("The setting file doesn't exists.")
End If
End Sub
You have a few typos and such in your code, but it is pretty close for your first try:
Friend userList As New List(Of Users)
Public Sub saveUserSetting()
' NOTE: Using the BINARY formatter will write a binary file, not XML
Using fs As New System.IO.FileStream("Settings.bin", IO.FileMode.OpenOrCreate)
Dim bf As New BinaryFormatter
bf.Serialize(fs, userList)
End Using
End Sub
Public Sub readUserSettings()
' this doesnt seem needed:
Dim currentUser As String = GetUserName()
' do not want the following line - it will create a NEW
' useRlist which exists only in this procedure
' you probably want to deserialize to the useRlist
' declared at the module/class level
' Dim useList As New List(Of Users)
' a) Check if the filename exists and just exit with an empty
' useRlist if not (like for the first time run).
' b) filemode wass wrong - never create here, just read
Using fs As New System.IO.FileStream("Settings.bin",
FileMode.Open, FileAccess.Read)
Dim bf As New BinaryFormatter
' user list is declared above as useRList, no useList
useList = bf.Deserialize(fs)
End Using
' Console.WriteLine is much better for this
MessageBox.Show(useList(0).ToString)
End Sub
<Serializable>
Class Users
' I would make this a property also
Public userName As String
Public Property allowedTime As Integer
Public Property lastLoggedInDate As String
Public Property remainingTime As Integer
Public Overrides Function ToString() As String
Return String.Format("{0} ({1}, {2}, {3})", userName, allowedTime, lastLoggedInDate, remainingTime)
End Function
End Class
ToDo:
a) decide whether you want XML or binary saves. With XML, users can read/edit the file.
b) Use a file path created from Environment.GetFolder(); with a string literal it may end up in 'Program Files' when deployed, and you cannot write there.
c) when reading/loading the useRlist, use something like
FileStream(myUserFile, FileMode.Open, FileAccess.Read)
It wont exist the first time run, so check if it does and just leave the list empty. After that, you just need to open it for reading. For saving use something like:
FileStream(myUserFile, FileMode.OpenOrCreate, FileAccess.Write)
You want to create it and write to it. You might put the Load/Save code inside a Try/Catch so if there are file access issues you can trap and report them, and so you know the list did not get saved or read.
Using a serializer, the entire contents of the list - no matter how long - will get saved with those 3-4 lines of code, and the entire list read back in the 2-3 lines to load/read the file.
I don't have the answer to all your questions however I've been also working on a timer application and just recently started using text file to read and write information. The method I'm using has proven itself fairly easy to use and not very confusing. Here is an extract of my code:
Dim startup As String = "C:\Users\DigiParent\Desktop\Project data\Digitimeinfo.txt"
Dim reader As New System.IO.StreamReader(startup, Encoding.Default)
Dim data As String = reader.ReadToEnd
Dim aryTextFile(6) As String
aryTextFile = data.Split(",")
This will read everything in the text file and in sort separate everything in between the , and store them individual in the array. To put the code back in one line use
Dim LineOfText As String
LineOfText = String.Join(",", aryTextFile)
so you could write someting like this to write your info to a text file:
Dim startup As String = "C:\Users\DigiParent\Desktop\Project data\Digitimeinfo.txt"
Dim objWriter As New System.IO.StreamWriter(startup, False)
Dim aryTextFile(2) As String
aryTextFile(0) = pasword
aryTextFile(1) = user
aryTextFile(2) = remainingtime
LineOfText = String.Join(",", aryTextFile)
objWriter.WriteLine(LineOfText)
objWriter.Close()
and to read it you could use steam reader.
I am having issues.
The script runs and builds the String and can Parse the Results, It receives a Accept Automatically then it searches for a value for RedirectURL.
How do i add a URL value to be build in the build version of my script.
Friend Overrides Function Filter() As String
Dim sb As New StringBuilder()
Return sb.ToString() '' Returning an empty string allows the applicant to be passed to the lender; otherwise the applicant is not sent
If app.BankAccount = String.Empty Then
sb.Append("Bank Account must be present;")
End If
If app.BankSortCode = String.Empty Then
sb.Append("Sort Code must be present;")
End If
If app.LoanAmount = String.Empty Then
sb.Append("Loan Amount must be present;")
End If
End Function
Friend Overrides Function Build() As String
Dim sb As New StringBuilder()
sb.AppendLine("&first_name=" & app.FirstName)
sb.AppendLine("&surname=" & app.LastName)
sb.AppendLine("&dob=" & app.DOB.ToString)
sb.AppendLine("&email=" & app.Email)
sb.AppendLine("&home_phone=" & app.LandPhone)
sb.AppendLine("&mobile_phone=" & app.MobilePhone)
sb.AppendLine("&postcode=" & app.PostCode)
sb.AppendLine("&affid=" & app.affID)
sb.AppendLine("&subid=" & lendertier.Credential1)
sb.AppendLine("&leadid=" & lendertier.Credential2)
sb.AppendLine("&bk_no=" & app.BankAccount)
sb.AppendLine("&bk_s=" & app.BankSortCode)
sb.AppendLine("&ar=" & app.LoanAmount.ToString)
Return sb.ToString()
End Function
Friend Overrides Function ParseResult(ByVal sResult As String) As Boolean
app.Outcome.RedirectURL = sResult
AcceptLead()
Return True
End Function
This question isn't overly clear but I'll give it a shot...
I think you are after retrieving the application version number and including it in the paramaterse in which case you will need something like:-
Dim versionNumber As Version
versionNumber = Assembly.GetExecutingAssembly().GetName().Version
You will have to import System.Reflection for this to work.
We perform a protocol based data sending to device where the device requires a formatted data packets.
the sample packet data is XXFSXXXFSXXXXXXXFSXXXXXX. The X mentioned is the max length size of each string. if data is less than string max length it should be filled with NULL character like ..11FS123FS1234XXXX (the remaining X will be filled with NULL).
I am just trying to convert one of VB6 function to VB.Net and below is the converted statement where i am facing issue
Option Strict Off
Option Explicit On
Imports Microsoft.VisualBasic.Compatibility.VB6
Imports System
Imports System.Runtime.InteropServices
Module FunctionCmd_Msg
Public FunCommand_Msg As Fun_CommandMessage = Fun_CommandMessage.CreateInstance()
'Function Command Message
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto)> _ _
Public Structure Fun_CommandMessage
<VBFixedString(1)> Public one As String
<VBFixedString(1)> Public two As String
<VBFixedString(3)> Public three As String
Dim five As String
<VBFixedString(8)> Public four As String
Public Shared Function CreateInstance() As Fun_CommandMessage
Dim result As New Fun_CommandMessage
result.one = String.Empty
result.two = String.Empty
result.three = String.Empty
result.four = String.Empty
result.five = String.Empty
End Function
End Structure
End Module
assuming:
one = "1"
two = "1"
three = "123"
four = "5678"
five = "testing"
FS = character (field separator)
on concatenating the strings i need a fixed length string such like this:
one & two & FS & three & FS & five & FS & four
output: since four is a fixed length string of 8 length remaining 4 characters should be filled with null as below
11 FS 123 FS testing FS 5678XXXX
Fixed-length strings simply make no sense in .NET any more. Microsoft tried to provide a similar class for easier upgrade but the truth is that you should change your code depending on usage:
What did the fixed-length string do in your VB6 code? Was it for no good reason? Then use a normal String in .NET.
Was it for interop with a C API? Then use marshalling to set a size for an array in the C API call.
Just forget about the fixed length, and use regular vb.net strings. They will return fine to whatever calls that code, including interop.
So, just pad your strings, and you off to the races.
In fact, build a Msg class that does the dirty work for you.
This looks quite nice to me:
NOTE how I set this up that you ONLY define the length of the string in ONE place. (so I use len(m_string) to determine the length from THEN on in the code.
Also, for debug and this example, in place of vbcharNull (which you should use), I used X for testing.
Now, in your code?
Just use this:
Dim Msg As New MyMsg
With Msg
.one = "A"
.two = "B"
.three = "C"
.four = "D"
.Five = "E"
End With
Debug.WriteLine(Msg.Msg("*") & vbCrLf)
Debug.WriteLine("total lenght = " & Len(Msg.Msg("X").ToString))
Output:
A*B*CXX*EXXXXXXX*DXXXXXXX
total lenght = 25
I note in your code that you have FIVE before FOUR - but if that is what you want, then no problem
Note that the class ALWAYS maintains the lengths for you.
So just paste this code into your module or even a new separate class.
Public Class MyMsg
'Dim cPad As Char = vbNullChar
Dim cPad As Char = "X"
Private m_one As String = New String(cPad, 1)
Private m_two As String = New String(cPad, 1)
Private m_three As String = New String(cPad, 3)
Private m_four As String = New String(cPad, 8)
Private m_five As String = New String(cPad, 8)
Public Property one As String
Get
Return m_one
End Get
Set(value As String)
m_one = MyPad(value, m_one)
End Set
End Property
Public Property two As String
Get
Return m_two
End Get
Set(value As String)
m_two = MyPad(value, m_two)
End Set
End Property
Public Property three As String
Get
Return m_three
End Get
Set(value As String)
m_three = MyPad(value, m_three)
End Set
End Property
Public Property four As String
Get
Return m_four
End Get
Set(value As String)
m_four = MyPad(value, m_four)
End Set
End Property
Public Property Five As String
Get
Return m_five
End Get
Set(value As String)
m_five = MyPad(value, m_five)
End Set
End Property
Public Function Msg(FS As String) As String
Return m_one & FS & m_two & FS & m_three & FS & m_five & FS & m_four
End Function
Private Function MyPad(str As String, strV As String) As String
Return Strings.Left(str & New String(Me.cPad, Len(strV)), Len(strV))
End Function
End Class
As noted, change the commented out line of "X" for the char back to vbCharNull.
And of course you STILL get to choose the delimiter. I used
Msg.Msg("*")
so I used a "*", but you can use space, or anything you want.
I have a userform in 2008 vb express edition. A part number is created from user input via a concat string. I want to then check if a certain portion of the part number exists in the existing file names in a directory. Below is a more detailed explanation.
This is my code for creating a part number from the user input on the form.
L_PartNo.Text = String.Concat(CB_Type.Text, CB_Face.Text, "(", T_Width.Text, "x", T_Height.Text, ")", mount, T_Qty.Text, weep, serv)
I then have the following code to tell the user if the configuration (part no) they just created exists
L_Found.Visible = True
If File.Exists("Z:\Cut Sheets\TCS Products\BLANK OUT SIGN\" & (L_PartNo.Text) & ".pdf") Then
L_Found.Text = "This configuration exists"
Else
L_Found.Text = "This configuration does NOT exist"
End If
This is where I need help. The part no will look like this BX002(30x30)A1SS I want to compare 002(30x30) (just this part of the file name) to all the files in one directory. I want a yes or no answer to the existance and not a list of all matching files. The code below is everything I've tried, not all at the same time.
Dim b As Boolean
b = L_PartNo.Text.Contains(NewFace)
Dim NewFace As String = String.Concat(CB_Face.Text, "(", T_Width.Text, "x", T_Height.Text, ")")
Dim NewFace = L_PartNo.Text.Substring(2, 10)
If filename.Contains(NewFace) Then
lNewFace.Visible = False
Else
lNewFace.Visible = True
End If
The code below was a translation from the answer in C# but it does not work either
Dim contains As Boolean = Directory.EnumerateFiles(path).Any(Function(f) [String].Equals(f, "myfilethree", StringComparison.OrdinalIgnoreCase))
Here's an example of how you can do it without the fancy LINQ and Lambda which seem to be confusing you:
Public Function FileMatches(folderPath As String, filePattern As String, phrase As String) As Boolean
For Each fileName As String In Directory.GetFiles(folderPath, filePattern)
If fileName.Contains(phrase) Then
Return True
End If
Next
Return False
End Function
Or, if you need it to be case insensitive:
Public Function FileMatches(folderPath As String, filePattern As String, phrase As String) As Boolean
For Each fileName As String In Directory.GetFiles(folderPath, filePattern)
If fileName.ToLower().Contains(phrase.ToLower()) Then
Return True
End If
Next
Return False
End Function
You would call the method like this:
lNewFace.Visible = FileMatches(path, "*.pdf", NewFace)
Try this:
lNewFace.Visible = IO.Directory.GetFiles(path, "*.pdf").Where(Function(file) file. _
Substring(2, 10) = NewFace).FirstOrDefault Is Nothing
Consider that the substring function will throw an exception if its arguments exceed the length of the string it is parsing