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editing html string having text and several images using regex

I am new to this forum and hoping to get some help.
I have a an HTML string having text and several base64 images.
I need to loop through all image tags adding a slash / before
the closing tag > so that each image ends with /> and return
a new html string with the changes.
so each
<IMG src="data:image/png;base64,iVBORw0KG....">
should then be
<IMG src="data:image/png;base64,iVBORw0KG...."/>
I am not versed with html and I am wondering how to do it
(using regex?).
Here is some pseudo code:
Function GetSourceImges(Sourcehtml As String) As List(Of String)
Dim listOfImgs As New List(Of String)()
'use regex to find image tags
'Return list of base64 image tags
End Function
For each image in list
insert a slash appropriately
next
Reconstitute a new html string with edited images
Thanks

Map all "IMG" tags using LINQ and use their indexes as an anchor to fix the missing "/" characters. please see my comments inside the code.
Sub Main()
Dim htmlstring As String = "<IMG src=""data:image/png;base64,iVBORw0KG....""> " & vbCrLf _
& "<img src=""data:image/png;base64,iVBORw0KG...."">" & vbCrLf _
& "<p>blahblah</p>" & vbCrLf _
& "<IMG src=""data:image/png;base64,iVBORw0KG...."">" & vbCrLf _
& "<p>blahblah</p>"
' find all indxes of img using regex and lambda exprations '
Dim indexofIMG() As Integer = Regex.Matches(htmlstring, "IMG", RegexOptions.IgnoreCase) _
.Cast(Of Match)().Select(Function(x) x.Index).ToArray()
' check from each index of "IMG" if "/" is missing '
For Each itm As Integer In indexofIMG
Dim counter As Integer = itm
While counter < htmlstring.Length - 1
If htmlstring(counter) = ">" Then
If htmlstring(counter - 1) <> "/" Then
' fix the missing "/" using Insert() method '
htmlstring = htmlstring.Insert(counter, "/")
End If
Exit While
End If
counter += 1
End While
Next
Console.WriteLine(htmlstring)
Console.ReadLine()
End Sub

Surprisingly it works with the console app but doesn't when I view it on a richtextbox as in btnEditHTML method below. The generated pdf has only one red dot and not two.
Can't say why.
I must say you have been very helpfull.
'SetTable and customimagetagprocessor borrowed from [here] iTextsharp base64 embedded image in header not parsing/showing
Imports System.IO
Imports iTextSharp.text
Imports iTextSharp.tool.xml
Imports iTextSharp.text.pdf
Imports iTextSharp.tool.xml.parser
Imports iTextSharp.tool.xml.pipeline.css
Imports iTextSharp.tool.xml.pipeline.html
Imports iTextSharp.tool.xml.pipeline.end
Imports iTextSharp.tool.xml.html
Imports System.Text.RegularExpressions
Public Class Form1
Dim dsktop As String = My.Computer.FileSystem.SpecialDirectories.Desktop
Public Function GetFormattedHTML(str As String) As String
'format images by changing > to />
' find all indxes of img using regex and lambda exprations '
Dim indexofIMG() As Integer = Regex.Matches(str.ToString, "IMG", RegexOptions.IgnoreCase) _
.Cast(Of Match)().Select(Function(x) x.Index).ToArray()
' check from each index of "IMG" if "/" is missing '
For Each itm As Integer In indexofIMG
Dim counter As Integer = itm
While counter < str.ToString.Length - 1
If str(counter) = ">" Then
If str(counter - 1) <> "/" Then
' fix the missing "/" using Insert() method '
str = str.ToString.Insert(counter, " /")
End If
Exit While
End If
counter += 1
End While
Next
Return str.ToString
End Function
Private Sub btnEditHTML_Click(sender As Object, e As EventArgs) Handles btnEditHTML.Click
Rtb.Text = String.Empty
'the 2 base64 images in the html below are actually just small red dots
Dim RawHTML As String = "<P>John Doe</P><IMG " &
"src=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==""> Jackson5<IMG " &
"src=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg=="">"
Rtb.Text = GetFormattedHTML(RawHTML)
'notice that the 2nd base64 string is not edited as required.
End Sub
Private Sub btnGenerate_Click(sender As Object, e As EventArgs) Handles btnGenerate.Click
'here I create a 2 column itextsharp table to parse my html into the cells
Dim doc As New iTextSharp.text.Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 30)
Dim wri As PdfWriter = PdfWriter.GetInstance(doc, New System.IO.FileStream(dsktop & "\testtable.pdf", System.IO.FileMode.Create))
doc.Open()
'set table columnwidths -------------------------------------------------------------
Dim MainTable As New PdfPTable(2) '2 column table
MainTable.WidthPercentage = 100
Dim Wth(1) As Single
Dim u As Integer = 2
For i As Integer = 0 To 1
Wth(i) = CInt(Math.Floor(2 * 500 / u))
Next
MainTable.SetWidths(Wth)
Dim htmlstr As String = GetFormattedHTML("<P>John Doe</P><IMG " &
"src=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==""> Jackson5<IMG " &
"src=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg=="">")
Dim Elmts = New ElementList()
Elmts = XMLWorkerHelper.ParseToElementList(htmlstr, Nothing)
Dim MinorTable As New PdfPTable(1)
MinorTable = SetTable(Elmts, htmlstr)
For i = 1 To 2
Dim Cell As New PdfPCell
Cell.AddElement(MinorTable)
MainTable.AddCell(Cell)
Next
doc.Add(MainTable)
doc.Close()
Process.Start(dsktop & "\testtable.pdf")
End Sub
Public Function SetTable(ByVal elements As ElementList, ByVal htmlcode As String) As PdfPTable
Dim tagProcessors As DefaultTagProcessorFactory = CType(Tags.GetHtmlTagProcessorFactory(), DefaultTagProcessorFactory)
tagProcessors.RemoveProcessor(HTML.Tag.IMG) ' remove the default processor
tagProcessors.AddProcessor(HTML.Tag.IMG, New CustomImageTagProcessor()) ' use our new processor
Dim cssResolver As ICSSResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(True)
cssResolver.AddCssFile(Application.StartupPath & "\pdf.css", True)
'see sample css file at https://learnwebcode.com/how-to-create-your-first-css-file/
'Setup Fonts
Dim xmlFontProvider As XMLWorkerFontProvider = New XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS)
xmlFontProvider.RegisterDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "assets/fonts/"))
Dim cssAppliers As CssAppliers = New CssAppliersImpl(xmlFontProvider)
Dim htmlContext As HtmlPipelineContext = New HtmlPipelineContext(cssAppliers)
htmlContext.SetAcceptUnknown(True)
htmlContext.SetTagFactory(tagProcessors)
Dim pdf As ElementHandlerPipeline = New ElementHandlerPipeline(elements, Nothing)
Dim htmlp As HtmlPipeline = New HtmlPipeline(htmlContext, pdf)
Dim css As CssResolverPipeline = New CssResolverPipeline(cssResolver, htmlp)
Dim worker As XMLWorker = New XMLWorker(css, True)
Dim p As XMLParser = New XMLParser(worker)
'Dim holderTable As New PdfPTable({1})
Dim holderTable As PdfPTable = New PdfPTable({1})
holderTable.WidthPercentage = 100
holderTable.HorizontalAlignment = Element.ALIGN_LEFT
Dim holderCell As New PdfPCell()
holderCell.Padding = 0
holderCell.UseBorderPadding = False
holderCell.Border = 0
p.Parse(New MemoryStream(System.Text.Encoding.ASCII.GetBytes(htmlcode)))
For Each el As IElement In elements
holderCell.AddElement(el)
Next
holderTable.AddCell(holderCell)
'Dim holderRow As New PdfPRow({holderCell})
'holderTable.Rows.Add(holderRow)
Return holderTable
End Function
End Class
Public Class CustomImageTagProcessor
Inherits iTextSharp.tool.xml.html.Image
Public Overrides Function [End](ctx As IWorkerContext, tag As Tag, currentContent As IList(Of IElement)) As IList(Of IElement)
Dim attributes As IDictionary(Of String, String) = tag.Attributes
Dim src As String = String.Empty
If Not attributes.TryGetValue(iTextSharp.tool.xml.html.HTML.Attribute.SRC, src) Then
Return New List(Of IElement)(1)
End If
If String.IsNullOrEmpty(src) Then
Return New List(Of IElement)(1)
End If
If src.StartsWith("data:image/", StringComparison.InvariantCultureIgnoreCase) Then
' data:[<MIME-type>][;charset=<encoding>][;base64],<data>
Dim base64Data As String = src.Substring(src.IndexOf(",") + 1)
Dim imagedata As Byte() = Convert.FromBase64String(base64Data)
Dim image As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(imagedata)
Dim list As List(Of IElement) = New List(Of IElement)()
Dim htmlPipelineContext As pipeline.html.HtmlPipelineContext = GetHtmlPipelineContext(ctx)
list.Add(GetCssAppliers().Apply(New Chunk(DirectCast(GetCssAppliers().Apply(image, tag, htmlPipelineContext), iTextSharp.text.Image), 0, 0, True), tag, htmlPipelineContext))
Return list
Else
If File.Exists(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, src)) Then
Dim imagedata As Byte() = File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, src))
Dim image As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, src))
Dim list As List(Of IElement) = New List(Of IElement)()
Dim htmlPipelineContext As pipeline.html.HtmlPipelineContext = GetHtmlPipelineContext(ctx)
list.Add(GetCssAppliers().Apply(New Chunk(DirectCast(GetCssAppliers().Apply(image, tag, htmlPipelineContext), iTextSharp.text.Image), 0, 0, True), tag, htmlPipelineContext))
Return list
End If
Return MyBase.[End](ctx, tag, currentContent)
End If
End Function
End Class

I highly recommend just using AngleSharp to parse the HTML, edit the document if required, and save it again.
There are many posts on here about why trying to parse HTML with regular expressions is a bad idea.
var doc = new HtmlParser().Parse(html);
As you aren't actually changing the HTML content, just fixing up the tags, your should be able to just parse it and save it with no changes to fix the tags.

How to: Check if current user is member of ‘domain admins’

I need to verify that a provided username is a Domain Administrator in c#.
Any idea's on how to do this?

You can use WindowsIdentity to get the current user.
Then create a WindowsPrincipal with the WindowsIdentity.
And check WindowsPrincipal.IsInRole(WindowsBuiltInRole.Administrator)
Hope this can help you.
EDIT : I just see the ASP tag now... This link could help you, same thing but for ASP.

Function ADUserInfo(sLogonUser, cOption)
Dim oConnection
Dim oCommand
Dim oRoot
Dim oDomain
Dim sADsPath
Dim sDomain
sDomain = Mid(sLogonUser, 1, Instr(1, sLogonUser, "\") - 1)
Set oConnection = CreateObject("ADODB.Connection")
With oConnection
.Provider = "ADsDSOObject"
.Mode = "1" 'Read
.Properties("Encrypt Password") = True
.Open "Active Directory Provider"
End With
Set oCommand = CreateObject("ADODB.Command")
oCommand.ActiveConnection = oConnection
Set oRoot = GetObject("LDAP://" & sDomain & "/rootdse")
Set oDomain = GetObject("LDAP://" & sDomain & "/" & oRoot.Get("defaultNamingContext"))
sADsPath = "<" & oDomain.ADsPath & ">"
Select Case lcase(cOption)
Case "groups"
ADUserInfo = ADUserGroups(sLogonUser, oConnection, oCommand, oRoot, oDomain, sADsPath)
Case "name"
ADUserInfo = ADUserName(sLogonUser, oConnection, oCommand, oRoot, oDomain, sADsPath)
Case "supervisor"
End Select
End Function
Function ADUserGroups(sLogonUser, oConnection, oCommand, oRoot, oDomain, sADsPath)
Dim sFilter
Dim sAttribsToReturn
Dim sDepth
Dim sDomainSID
Dim vObjectSID
Dim sObjectSID
Dim sGroupRID
Dim iPrimaryGroupID
Dim oPrimaryGroup
Dim oRS
Dim value
Dim cGroups
Dim sDomain
Dim sLogonName
sDomain = Mid(sLogonUser, 1, Instr(1, sLogonUser, "\") - 1)
sLogonName = Mid(sLogonUser, Instr(1, sLogonUser, "\") + 1)
sFilter = "(&(objectCategory=Person)(objectClass=user)(sAMAccountName=" & sLogonName & "))"
sAttribsToReturn = "memberOf,primaryGroupID,objectSID"
sDepth = "subTree"
ocommand.CommandText = sADsPath & ";" & sFilter & ";" & sAttribsToReturn & ";" & sDepth
Set oRS = ocommand.Execute
' Only one user should meet the criteria
If (oRS.RecordCount = 1) Then
' Get that user's info
For i = 0 To oRS.Fields.Count - 1
If (oRS.Fields(i).Name = "memberOf") Then
' I've never seen this field come back with more than
' ONE value, but the original code I started with
' treated the memberOf property as though it was a
' collection. So, I've left it a collection until
' I can verify it. KLW
cGroups = ""
For Each value In oRS.Fields(i).Value
cGroups = cGroups & replace(split(value,",")(0),"CN=","") & ";"
Next
ElseIf (oRS.Fields(i).Name = "primaryGroupID") Then
' need this to get the PrimaryGroup after other group membership has been obtained
' (Primary Group ID and Object SID ID needed to get the primary group)
iPrimaryGroupID = oRS.Fields(i).Value
ElseIf (oRS.Fields(i).Name = "objectSID") Then
' adVarBinary -- need this to get the PrimaryGroup.
' It is not included in the memberOf group list
vObjectSID = oRS.Fields(i).Value
sObjectSID = SDDL_SID(vObjectSID)
End If
Next
' The primary group is not included in memberOf...
' We have the SDDL form of the user's SID.
' Remove the user's RID ( the last sub authority)
' up to the "-"
'
sDomainSID = Mid(sObjectSID, 1, (InStrREV(sObjectSID,"-")))
' Build the SID of the Primary group
' from the domainSID and the Primary Group RID in
' the PrimaryGroupID.
'
sGroupRID = StrRID(iPrimaryGroupID)
sDomainSID = sDomainSID & sGroupRID
' Get the primary group
'
set oPrimaryGroup = GetObject("LDAP://" & sDomain & "/<SID=" & sDomainSID & ">")
cGroups = replace(split(oPrimaryGroup.Get("DistinguishedName"),",")(0),"CN=","") & ";" & cGroups
ADUserGroups = cGroups
End If
End Function
Function ADUserName(sLogonUser, oConnection, oCommand, oRoot, oDomain, sADsPath)
Dim sFilter
Dim sAttribsToReturn
Dim sDepth
Dim sDomainSID
Dim vObjectSID
Dim sObjectSID
Dim sGroupRID
Dim iPrimaryGroupID
Dim oPrimaryGroup
Dim oRS
Dim value
Dim sDomain
Dim sLogonName
sDomain = Mid(sLogonUser, 1, Instr(1, sLogonUser, "\") - 1)
sLogonName = Mid(sLogonUser, Instr(1, sLogonUser, "\") + 1)
sFilter = "(&(objectCategory=Person)(objectClass=user)(sAMAccountName=" & sLogonName & "))"
sAttribsToReturn = "distinguishedName"
sDepth = "subTree"
ocommand.CommandText = sADsPath & ";" & sFilter & ";" & sAttribsToReturn & ";" & sDepth
Set oRS = ocommand.Execute
' Only one user should meet the criteria
If (oRS.RecordCount = 1) Then
' Get that user's info
For i = 0 To oRS.Fields.Count - 1
If (oRS.Fields(i).Name = "distinguishedName") Then
ADUserName = replace(split(oRS.Fields(i).Value,",")(0),"CN=","")
End If
Next
End If
End Function
function SDDL_SID ( oSID )
dim IssueAuthorities(11)
Dim SubAuthorities
Dim strSDDL
Dim IssueIndex
Dim Revision
Dim i, j, k, index, p2, subtotal, dblSubAuth
IssueAuthorities(0) = "-0-0"
IssueAuthorities(1) = "-1-0"
IssueAuthorities(2) = "-2-0"
IssueAuthorities(3) = "-3-0"
IssueAuthorities(4) = "-4"
IssueAuthorities(5) = "-5"
IssueAuthorities(6) = "-?"
IssueAuthorities(7) = "-?"
IssueAuthorities(8) = "-?"
IssueAuthorities(9) = "-?"
' First byte is the revision value
'
Revision = ascb(midB(osid,1,1))
' Second byte is the number of sub authorities in the
' SID
'
SubAuthorities = CInt(ascb(midb(oSID,2,1)))
strSDDL = "S-" & Revision
IssueIndex = CInt(ascb(midb(oSID,8,1)))
strSDDL = strSDDL & IssueAuthorities(IssueIndex)
index = 9
i = index
for k = 1 to SubAuthorities
p2 = 0
subtotal = 0
for j = 1 to 4
dblSubAuth = CDbl(ascb(midb(osid,i,1))) * (2^p2)
subTotal = subTotal + dblSubAuth
p2 = p2 + 8
i = i + 1
next
' Convert the value to a string, add it to the SDDL Sid and continue
'
strSDDL = strSDDL & "-" & cstr(subTotal)
next
SDDL_SID = strSDDL
end function
function Get_HexString( oSID )
Dim outStr, i, b
outStr = ""
for i = 0 to Ubound(oSid)
b = hex(ascb(midb(oSid,i+1,1)))
if( len(b) = 1 ) then b = "0" & b
outStr = outStr & b
next
Get_HexString = outStr
end function
function StrRID( inVal )
dim dLocal
if( (inVal and &H80000000) <> 0 ) then
dLocal = CDbl((inval and &H7FFFFFFF))
dLocal = dLocal + 2^31
StrRID = cstr(dLocal)
else
StrRID = Cstr(inVal)
end if
end function

filesystemwatcher chrome cache in Visual basic [duplicate]

I've made a program in Visual Basic 2010, that monitors and write down changes in a folder eg. when a file deletes, when a file renames, when a file creates and which files, but it's a problem. I've writed the code to make a new line when another change is made, when a change is made, it writes it down to a file named log.txt, but the log only looks like "File log.txt has been modified" because the program, when it write changes to the log, it changes the log.txt to write down the log, but the strange is, it deletes everything in the document and writes "File log..txt has been modified" even if I have writed in the code to make a new line before writing. Can someone help me with this problem? Here's the code:
Imports System.IO
Imports System.Diagnostics
Public Class Form1
Public watchfolder As FileSystemWatcher
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
watchfolder = New System.IO.FileSystemWatcher()
'this is the path we want to monitor
watchfolder.Path = TextBox1.Text
'Add a list of Filter we want to specify
'make sure you use OR for each Filter as we need to
'all of those
watchfolder.NotifyFilter = IO.NotifyFilters.DirectoryName
watchfolder.NotifyFilter = watchfolder.NotifyFilter Or _
IO.NotifyFilters.FileName
watchfolder.NotifyFilter = watchfolder.NotifyFilter Or _
IO.NotifyFilters.Attributes
' add the handler to each event
AddHandler watchfolder.Changed, AddressOf logchange
AddHandler watchfolder.Created, AddressOf logchange
AddHandler watchfolder.Deleted, AddressOf logchange
' add the rename handler as the signature is different
AddHandler watchfolder.Renamed, AddressOf logrename
'Set this property to true to start watching
watchfolder.EnableRaisingEvents = True
Button1.Enabled = False
Button2.Enabled = True
'End of code for btn_start_click
End Sub
Private Sub logchange(ByVal source As Object, ByVal e As _
System.IO.FileSystemEventArgs)
If e.ChangeType = IO.WatcherChangeTypes.Changed Then
Dim writer As New IO.StreamWriter("log.txt")
writer.WriteLine(Chr(13) & "File" + " " + e.FullPath + " " + "has been modified")
writer.Close()
End If
If e.ChangeType = IO.WatcherChangeTypes.Created Then
Dim writer As New IO.StreamWriter("log.txt")
writer.WriteLine(Chr(13) & "File" + " " + e.FullPath + " " + "has been created")
writer.Close()
End If
If e.ChangeType = IO.WatcherChangeTypes.Deleted Then
Dim writer As New IO.StreamWriter("log.txt")
writer.WriteLine(Chr(13) & "Filde" + " " + e.FullPath + " " + "has been deleted")
writer.Close()
End If
End Sub
Public Sub logrename(ByVal source As Object, ByVal e As _
System.IO.RenamedEventArgs)
Dim writer As New IO.StreamWriter("log.txt")
writer.WriteLine(Chr(13) & "File" + " " + e.FullPath + "has been renamed to" + " " + e.Name)
writer.Close()
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
' Stop watching the folder
watchfolder.EnableRaisingEvents = False
Button1.Enabled = True
Button2.Enabled = False
End Sub
End Class

When you open your streamwriter, you are not telling it to append, so it overwrites:
Dim writer As New IO.StreamWriter("log.txt", True)
Also, you dont need a new stream for each activity:
Dim msg as string= Environment.NewLine & "File " & e.FullPath & " "
Select case e.ChangeType
case IO.WatcherChangeTypes.Created
msg &= "has been created"
case IO.WatcherChangeTypes.Deleted
msg &= "has been deleted"
...etc
End Select
Dim writer As New IO.StreamWriter("log.txt", True)
writer.WriteLine(msg)
writer.Close()
..you could also leave the stream open until the watcher ends
You probably should exempt logging changes to log.txt, so test e.FullPath:
If System.Io.Path.GetFileName(e.FullPath).ToLower = "log.text" Then Exit Sub

Now the program in working! Thank you MPelletier and Plutonix for the amazing help! Here is the complete code:
Imports System.IO
Imports System.Diagnostics
Public Class Form1
Public watchfolder As FileSystemWatcher
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
watchfolder = New System.IO.FileSystemWatcher()
watchfolder.IncludeSubdirectories = True
watchfolder.Path = TextBox1.Text
watchfolder.NotifyFilter = IO.NotifyFilters.DirectoryName
watchfolder.NotifyFilter = watchfolder.NotifyFilter Or _
IO.NotifyFilters.FileName
watchfolder.NotifyFilter = watchfolder.NotifyFilter Or _
IO.NotifyFilters.Attributes
AddHandler watchfolder.Changed, AddressOf logchange
AddHandler watchfolder.Created, AddressOf logchange
AddHandler watchfolder.Deleted, AddressOf logchange
AddHandler watchfolder.Renamed, AddressOf logrename
watchfolder.EnableRaisingEvents = True
Button1.Enabled = False
Button2.Enabled = True
End Sub
Private Sub logchange(ByVal source As Object, ByVal e As _
System.IO.FileSystemEventArgs)
If System.IO.Path.GetFileName(e.FullPath).ToLower = "log.txt" Then Exit Sub
Dim msg As String = Environment.NewLine & "File " & e.FullPath & " "
Select Case e.ChangeType
Case IO.WatcherChangeTypes.Created
msg &= "has been created" + " " + "Time:" + " " + Format(TimeOfDay)
Case IO.WatcherChangeTypes.Deleted
msg &= "has been deleted" + " " + "Time:" + " " + Format(TimeOfDay)
Case IO.WatcherChangeTypes.Changed
msg &= "has been modified" + " " + "Time:" + " " + Format(TimeOfDay)
End Select
Dim writer As New IO.StreamWriter("log.txt", True)
writer.WriteLine(msg)
writer.Close()
End Sub
Public Sub logrename(ByVal source As Object, ByVal e As _
System.IO.RenamedEventArgs)
Select e.ChangeType
Case IO.WatcherChangeTypes.Created
Exit Sub
Case IO.WatcherChangeTypes.Changed
Exit Sub
Case IO.WatcherChangeTypes.Deleted
Exit Sub
Case Else
Dim msgrn As String = Environment.NewLine & "File " + e.OldName + " "
msgrn &= "has been renamed to" + " " + e.Name + " " + "Time:" + " " + Format(TimeOfDay)
Dim writer As New IO.StreamWriter("log.txt", True)
writer.WriteLine(msgrn)
writer.Close()
End Select
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
watchfolder.EnableRaisingEvents = False
Button1.Enabled = True
Button2.Enabled = False
End Sub
Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click
Me.Hide()
MsgBox("To close it later, don't open the program again, press CTRL+ALT+DELETE and press Start Task Manager or something like that, and go to processes and kill FolderMonitor.exe or what you have named the file", 0 + 64, "FolderMonitor")
End Sub
End Class

C# to VB AddressOf

I'm more of a VB guy than c# so i have this code in c#:
MouseGesture _mg;
public Form1()
{
InitializeComponent();
// b) Load a file with the commands and keys once in your application
MouseGestureData.Instance.Commands.ReadFile(
Environment.CurrentDirectory + #"\MouseGestureCommands.xml" );
// c) For each Form you want to use mouse gestures...
_mg = new MouseGesture( this, null );
_mg.MouseGestureEntered += new MouseGestureEventHandler(
OnMouseGestureEntered );
}
private void OnMouseGestureEntered( object sender, MouseGestureEventArgs e )
{
// d) In your registered MouseGestureEventHandler, handle the commands
// you want
MessageBox.Show( string.Format( "OnMouseGestureEntered:\n" +
" Command:\t{0}\n" +
" Key:\t\t{1}\n" +
" Control:\t\t{2}\n" +
" Bounds:\t\t{3}",
e.Command, e.Key, e.Control,
e.Bounds.ToString() ) );
}
This is what i can come up with from VB.net:
Private _mg As MouseGesture
Public Sub New()
InitializeComponent()
MouseGestureData.Instance.Commands.ReadFile(Environment.CurrentDirectory + "\MouseGestureCommands.xml")
_mg = New MouseGesture(Me, Nothing)
_mg.MouseGestureEntered += New MouseGestureEventHandler(AddressOf OnMouseGestureEntered)
End Sub
Private Sub OnMouseGestureEntered(sender As Object, e As MouseGestureEventArgs)
' d) In your registered MouseGestureEventHandler, handle the commands
' you want
MessageBox.Show(String.Format("OnMouseGestureEntered:" & vbLf & " Command:" & vbTab & "{0}" & vbLf & " Key:" & vbTab & vbTab & "{1}" & vbLf & " Control:" & vbTab & vbTab & "{2}" & vbLf & " Bounds:" & vbTab & vbTab & "{3}", e.Command, e.Key, e.Control, e.Bounds.ToString()))
End Sub
Problem being is the line _mg.MouseGestureEntered its saying:
Public Event MouseGestureEntered(sender As Object, e As DcamMouseGesture.MouseGestureEventArgs)' is an event, and cannot be called directly. Use a 'RaiseEvent' statement to raise an event.
What would i need to convert it to in order for it to work in VB?

Instead of:
_mg.MouseGestureEntered += New MouseGestureEventHandler(AddressOf OnMouseGestureEntered)
Try using:
AddHandler _mg.MouseGestureEntered, AddressOf OnMouseGestureEntered

Why does DirectoryEntry("WinNT://") not show group everyone?

The below function (is supposed to) lists all groups on the local machine.
Now the question: Why does the "everyone" group not show up ?
If I change directory permissions as user, I see the "everyone" group, so it must be there, somewhere.
Public Shared Function GetAllGroups() As DataTable
Return GetAllGroups(System.Environment.MachineName)
End Function
' Tools.Permissions.Local.GetAllGroups() '
Public Shared Function GetAllGroups(ByVal strDomain As String) As DataTable
Dim dt As New DataTable
Dim dr As DataRow = Nothing
Try
Dim bException As Boolean = False
Dim deLocalMachine As System.DirectoryServices.DirectoryEntry = New System.DirectoryServices.DirectoryEntry("WinNT://" + strDomain)
'Dim deRootObject As System.DirectoryServices.DirectoryEntry = GetDirectoryEntry(strPath, strUserName, strPassword, bException) '
If bException Then
Return Nothing
End If
For Each child As System.DirectoryServices.DirectoryEntry In deLocalMachine.Children
Try
If StringComparer.OrdinalIgnoreCase.Equals(child.SchemaClassName, "group") Then
If Not dt.Columns.Contains("Members") Then
dt.Columns.Add("Members", GetType(System.String))
End If
For Each strPropertyName As String In child.Properties.PropertyNames
If Not dt.Columns.Contains(strPropertyName) Then
dt.Columns.Add(strPropertyName, GetType(System.String))
End If
Next strPropertyName
dr = dt.NewRow
Dim strMembers As String = ""
For Each member As Object In DirectCast(child.Invoke("Members"), IEnumerable)
Using memberEntry As New System.DirectoryServices.DirectoryEntry(member)
Try
strMembers += memberEntry.Properties("Name").Value.ToString() + Environment.NewLine
Console.WriteLine(memberEntry.Path)
Catch exFixMeIsNotNullNotWorking As Exception
End Try
End Using
Next
dr("Members") = strMembers
For Each strPropertyName As String In child.Properties.PropertyNames
If StringComparer.OrdinalIgnoreCase.Equals(strPropertyName, "objectSid") Then
Dim strSID As String = ""
Try
Dim sidThisSid As New System.Security.Principal.SecurityIdentifier(child.Properties(strPropertyName).Value, 0)
strSID = sidThisSid.ToString()
' http://stackoverflow.com/questions/1040623/convert-a-username-to-a-sid-string-in-c-net '
' NTAccount ntAccount = (NTAccount)sid.Translate( typeof( NTAccount ) ); '
' Dim ntAccount As Security.Principal.NTAccount = CType(sidThisSid.Translate(GetType(Security.Principal.NTAccount)), Security.Principal.NTAccount) '
Catch ex As Exception
End Try
dr(strPropertyName) = strSID
Else
dr(strPropertyName) = child.Properties(strPropertyName).Value.ToString()
End If
Next strPropertyName
dt.Rows.Add(dr)
End If
Catch ex As Exception ' Don't finish just because one fails
Console.WriteLine(ex.Message.ToString & vbLf & vbLf & ex.StackTrace.ToString, MsgBoxStyle.Critical, "FEHLER ...")
End Try
Next
Catch ex As Exception
Console.WriteLine(ex.Message.ToString & vbLf & vbLf & ex.StackTrace.ToString, MsgBoxStyle.Critical, "FEHLER ...")
End Try
Return dt
End Function ' ListEverything

The Everyone group isn't a standard group but rather an implicit group or built-in principal. If you open your local "Users and Groups" you won't see it listed there either. The same is true of other "groups" such as Authenticated Users. If you want to access these you need to use the System.Security.Principal.WellKnownSidType enumeration. This Windows 2008 article is really relevant for older versions of Windows, too.