I need to find obsolute occurrence of a string in a file.
If a string "I_LOVE_INDIA" in a file.
If the input string is "I_LOVE" then search status should be false.
If the input string is "I_LOVE_INDIA" then search status should be true.
I am not able to get using below one:
System.IO.File.ReadAllText("D:\asdf\def.txt").IndexOf("string_to_search")
This will work:
System.IO.File.ReadAllText("D:\asdf\def.txt").IndexOf("I_LOVE_INDIA")
If you want it to fail when you look for "I_LOVE_INDIA_TOO" then you'll need to check for that, eg:
Dim s as String = System.IO.File.ReadAllText("D:\asdf\def.txt")
Dim success as Boolean = CheckStringContainsILoveIndia(s)
Public Function CheckStringContainsILoveIndia(Byval s as String) as Boolean
Dim success as Boolean = False
If s.IndexOf("I_LOVE_INDIA_TOO") == -1 AND s.IndexOf("I_LOVE_INDIA") > -1 Then
success = True
End If
return success
End Sub
Related
so..
I have a txt file with hundreds of sentences or strings.
I also have 4 comboboxes with options that a user can select from and
each combobox is part of a different selection criteria. They may or may not use all the comboboxes.
When a user selects an option from any combobox I use a For..Next statement to run through the txt file and pick out all the strings that contain or match whatever the user selected. It then displays those strings for the user to see, so that if they wanted to they could further narrow down the search from that point by using the 3 remaining comboboxes making it easier to find what they want.
I can achieve this by using lots of IF statements within the for loop but is that the only way?
No, there are other ways. You can leverage LINQ to get rid of some of those if statements:
Private _lstLinesInFile As List(Of String) = New List(Of String)
Private Function AddClause(ByVal qryTarget As IEnumerable(Of String), ByVal strToken As String) As IEnumerable(Of String)
If Not String.IsNullOrWhiteSpace(strToken) Then
qryTarget = qryTarget.Where(Function(ByVal strLine As String) strLine.Contains(strToken))
End If
Return qryTarget
End Function
Public Sub YourEventHandler()
'Start Mock
Dim strComboBox1Value As String = "Test"
Dim strComboBox2Value As String = "Stack"
Dim strComboBox3Value As String = String.Empty
Dim strComboBox4Value As String = Nothing
'End Mock
If _lstLinesInFile.Count = 0 Then
'Only load from the file once.
_lstLinesInFile = IO.File.ReadAllLines("C:\Temp\Test.txt").ToList()
End If
Dim qryTarget As IEnumerable(Of String) = (From strTarget In _lstLinesInFile)
'Assumes you don't have to match tokens that are split by line breaks.
qryTarget = AddClause(qryTarget, strComboBox1Value)
qryTarget = AddClause(qryTarget, strComboBox2Value)
qryTarget = AddClause(qryTarget, strComboBox3Value)
qryTarget = AddClause(qryTarget, strComboBox4Value)
Dim lstResults As List(Of String) = qryTarget.ToList()
End Sub
Keep in mind this is case sensitive so you may want to throw in some .ToLower() calls in there:
qryTarget = qryTarget.Where(Function(ByVal strLine As String) strLine.ToLower().Contains(strToken.ToLower()))
I think a compound If statement is the simplest:
Dim strLines() As String = IO.File.ReadAllText(strFilename).Split(vbCrLf)
Dim strSearchTerm1 As String = "Foo"
Dim strSearchTerm2 As String = "Bar"
Dim strSearchTerm3 As String = "Two"
Dim strSearchTerm4 As String = ""
Dim lstOutput As New List(Of String)
For Each s As String In strLines
If s.Contains(strSearchTerm1) AndAlso
s.Contains(strSearchTerm2) AndAlso
s.Contains(strSearchTerm3) AndAlso
s.Contains(strSearchTerm4) Then
lstOutput.Add(s)
End If
Next
I want to know if folder (subfolder) exist in google drive or not , after searching in this page , i try to do it , i create a boolean function which return true if folder exist .
here is a code of boolean function
Public Function exist(v As String) As Boolean
Dim pag As String
Dim req = Service.Files.List()
req.Q = "application/vnd.google-apps.folder"
req.PageToken = pag
Dim result = req.Execute()
If (result.NextPageToken IsNot Nothing) Then
Return False
Else
Return True
End If
End Function
and here how i call it
If (exist(dat_sauv.SelectedItem) = False) Then
MessageBox.Show("folder exist")
End If
the exception is
exception has declenched in exist method in this insctruction
Dim result = req.Execute()
is my method correct or not ? can you help me
There are two problems with your code.
Improper query
Your line req.Q = "application/vnd.google-apps.folder"
should be
req.Q = "mimeType='application/vnd.google-apps.folder' and name = '"+v+"' and trashed=false"
You'll probably need to tidy up the quoting and escaping (ie Don't copy/paste and expect it to work first time)
use of nextPageToken
The presence of the folder will not be indicated by the presence of nextpageToken. Instead, you need to check the files array within the response for >0 elements.
Function checkIsAuthorized(ByVal users As String) As Boolean
Dim UserJobCode As String = dcChris.getJobCode(users)
Dim values As String = My.Settings.canResendJobcode
Dim usersCode As String() = values.Split(",")
Return usersCode.Contains(UserJobCode)
'If usersCode.Contains(UserJobCode) Then
' canResend = True
' Return True
'End If
'canResend = False
'Return False
End Function
The commented portion of the function works, I was just trying to make the code more efficient with the return statement. But it does not return a bool because the global is still reading false. Doing it the old way worked.
Any ideas?
Dim canResend As Boolean
Function checkIsAuthorized(ByVal users As String) As Boolean
Dim UserJobCode As String = dcChris.getJobCode(users)
Dim values As String = My.Settings.canResendJobcode
Dim usersCode As String() = values.Split(",")
Return usersCode.Contains(UserJobCode)
End Function
This is what I settled on. It works great for my needs. Thanks everyone.
I need to add this encryptdecrypt code ÄÖÅ characters, but i don't know how?
Here's my code:
Public Function EncryptDecryptString(ByVal inputString As String, Optional ByVal decrypt As Boolean = False) As String
Dim sourceChars As String = " ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
Dim resultChars As String = "36N8lkXruq94jMZInPpshR xHc2mTQb7eYai5vGWDzFdoC0wKSBt1EOgVALJfUy"
Dim result As String
If decrypt Then
result = New String(inputString.Select(Function(c) sourceChars(resultChars.IndexOf(c))).ToArray())
Else
result = New String(inputString.Select(Function(c) resultChars(sourceChars.IndexOf(c))).ToArray())
End If
Return result
End Function
You current code will work (as well as it does for English characters) if you simply add the Swedish characters to both sourceChars and resultChars like this.
Dim sourceChars As String = " ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÅabcdefghijklmnopqrstuvwxyz0123456789äöå"
Dim resultChars As String = "äöå36N8lkXruq94jMZInPpshR xHc2mTQb7eYai5ÄÖÅvGWDzFdoC0wKSBt1EOgVALJfUy"
However, your code will fail if the input string contains any character that you are not expecting (for example a tab character or newline). Here is a version of the function that doesn't throw an exception on an unexpected character, but simply uses it without encrypting that character (for serious encryption, it would be better to get an exception).
Public Function EncryptDecryptString(ByVal inputString As String, Optional ByVal decrypt As Boolean = False) As String
Dim sourceChars As String = " ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÅabcdefghijklmnopqrstuvwxyz0123456789äöå"
Dim resultChars As String = "äöå36N8lkXruq94jMZInPpshR xHc2mTQb7eYai5ÄÖÅvGWDzFdoC0wKSBt1EOgVALJfUy"
Dim result() As Char = inputString
Dim inChars As String = If(decrypt, resultChars, sourceChars)
Dim outChars As String = If(decrypt, sourceChars, resultChars)
For i As Integer = 0 To inputString.Length - 1
Dim pos As Integer = inChars.IndexOf(inputString(i))
If pos >= 0 Then result(i) = outChars(pos)
Next
Return result
End Function
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