servicio timer elapsed

SystemTimers.Timer

Timer1_Elapsed(Me, Nothing)

ordenar elementos combobox

ComboBox1.Sorted = True

Buscar todos los archivos en todos los directorios

Dim array() As String = Directory.GetFiles(ruta_carpeta, "*", SearchOption.AllDirectories)

buscar texto en string con regex

Dim rgx As String = ".PDF"

Dim rx As Regex = New(rgx)

If rx.IsMatch("c:\archivo.PDF") Then

End If

carpetas directorios

Public Function get_fecha(ByVal f As String) As String
        Dim t As FileInfo = New FileInfo(f)
        Return t.Directory.Parent.Parent.ToString & t.Directory.Parent.ToString & t.Directory.Name
    End Function

boleta declaración de cumplimiento

https://www4.sii.cl/certBolElectDteInternet

tabla en html

tr: table row (fila de tabla)
td: table data (celda de una tabla)


<table border="5" bordercolor="#ff0000">
<tr>
<td>Cell A</td>
<td>Cell B</td>
<td>Cell C</td>
</tr>
</table>

lista de procesos

Imports System.IO



Public Class Form1

    Public t As Timer

    Private mtimers() As Timer


    Private sc1 As New Object
    Private sc2 As New Object

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim max As Integer = 2

        ReDim mtimers(max)
        For i As Integer = 0 To max
            t = New Timer

            If i = 0 Then
                t.Interval = 100 * 1
            ElseIf i = 1 Then
                t.Interval = 1000 * 1
            ElseIf i = 2 Then
                t.Interval = 1000 * 30
            End If

            t.Enabled = True
            t.Tag = i + 1
            AddHandler t.Tick, AddressOf Timer_Tick
            mtimers(i) = t
        Next

    End Sub

    Private Sub Timer_Tick(ByVal sender As Object, ByVal e As EventArgs)
        Dim timer As Timer = DirectCast(sender, Timer)
        Select Case timer.Tag
            Case "1"

                Dim th1 As Threading.Thread
                'th1 = New Threading.Thread(AddressOf function1)
                th1 = New Threading.Thread(Sub() Me.function1(7))
                th1.Start()

                'Dim sw As New StreamWriter("test1.txt", True)
                'sw.WriteLine(Now.ToString("HH:mm:ss"))
                'sw.Close()

                'While True
                'End While

                'timer.Stop()
            Case "2"
                'MessageBox.Show("TAG 2")
                Dim th2 As Threading.Thread
                th2 = New Threading.Thread(AddressOf function2)
                th2.Start()


                'Dim sw As New StreamWriter("test2.txt", True)
                'sw.WriteLine(Now.ToString("HH:mm:ss"))
                'sw.Close()


            Case 3
                Dim th3 As Threading.Thread
                th3 = New Threading.Thread(AddressOf function3)
                th3.Start()


        End Select
    End Sub


    Private Sub function1(ByVal id As Integer)

        SyncLock sc1

            'If id = 1 Then
            '    Exit Sub
            'End If

            'While True
            '    Threading.Thread.Sleep(1000)
            'End While


            Dim sw As New StreamWriter("test1.txt", True)
            sw.WriteLine(Now.ToString("HH:mm:ss"))
            sw.Close()

        End SyncLock
    End Sub

    Private Sub function2()
        SyncLock sc1
            Dim sw As New StreamWriter("test1.txt", True)
            'sw.WriteLine(Now.ToString("HH:mm:ss"))
            sw.WriteLine("hola!")
            sw.Close()

        End SyncLock
    End Sub


    Private Sub function3()
        Dim sw As New StreamWriter("test3.txt", True)
        sw.WriteLine(Now.ToString("HH:mm:ss"))
        sw.Close()
    End Sub


    Private Sub btn_cancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_cancel.Click
        For Each t As Timer In mtimers
            t.Stop()
        Next
    End Sub

End Class
' https://www.dreamincode.net/forums/topic/140657-how-to-use-the-timer-as-array/
' http://vbcity.com/forums/t/36812.aspx
' https://social.msdn.microsoft.com/Forums/vstudio/en-US/ce7214c3-2116-4cfa-bb70-58ba2997cea7/stop-all-timers-at-once?forum=vbgeneral

threads con parámetros

 Dim th1 As Threading.Thread
th1 = New Threading.Thread(Sub() Me.function(1))
th1.Start()



Private Sub function1(ByVal id As Integer)
End Sub

fuente

lista de funciones con timer

Imports System.IO

Public Class Form1

    Public t As Timer

    Private mtimers() As Timer

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ReDim mtimers(1)
        For i As Integer = 0 To 1
            t = New Timer
            t.Interval = 1000 * (i + 1)
            t.Enabled = True
            t.Tag = i + 1
            AddHandler t.Tick, AddressOf Timer_Tick
            mtimers(i) = t
        Next

    End Sub

    Private Sub Timer_Tick(ByVal sender As Object, ByVal e As EventArgs)
        Dim timer As Timer = DirectCast(sender, Timer)
        Select Case timer.Tag
            Case "1"
                Dim sw As New StreamWriter("test1.txt", True)
                sw.WriteLine(Now.ToString("HH:mm:ss"))
                sw.Close()
                'timer.Stop()
            Case "2"
                'MessageBox.Show("TAG 2")
                Dim sw As New StreamWriter("test2.txt", True)
                sw.WriteLine(Now.ToString("HH:mm:ss"))
                sw.Close()
        End Select
    End Sub

    Private Sub btn_cancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_cancel.Click
        For Each t As Timer In mtimers
            t.Stop()
        Next
    End Sub

End Class

fuente1
fuente2
fuente3