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vb.net - progress bar

Posted on 2011-03-02
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Last Modified: 2012-05-11
Hello there,
I am using this code to create directories based on the date that the picture was taken. it looks for all of the images in a directory and then it moves them.
when I select a dir that contains about 3k pictures it gets frozen for about 3 minutes saying "not responding" and then all the pictures are sorted out correctly..
I would like to prevent that and have a progress bar showing the percentage done.. how can I do that exactly?
Imports System.IO
Imports System.Text
Imports System.Drawing.Imaging
Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If FolderBrowserDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
            ProcessFiles(FolderBrowserDialog1.SelectedPath, "*.jpg")
        End If
    End Sub

    Private Sub ProcessFiles(ByVal Folder As String, ByVal Pattern As String)
        Dim di As New DirectoryInfo(Folder)
        For Each fi As FileInfo In di.GetFiles(Pattern, SearchOption.AllDirectories)
            Dim values() As String = FindDateTaken(fi.FullName).Split(":")
            If values.Length >= 2 Then
                values(2) = values(2).Split(" ")(0)
                Try
                    Dim dt As New DateTime(values(0), values(1), values(2))
                    Dim SubDi As New DirectoryInfo(Path.Combine(di.FullName, dt.Year))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If
                    SubDi = New DirectoryInfo(Path.Combine(SubDi.FullName, dt.Month.ToString("00")))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If
                    SubDi = New DirectoryInfo(Path.Combine(SubDi.FullName, dt.Day.ToString("00")))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If

                    Dim NewFileName As String = Path.Combine(SubDi.FullName, fi.Name)
                    fi.MoveTo(NewFileName)
                Catch ex As Exception

                End Try
            End If
        Next
    End Sub

    Private Function FindDateTaken(ByVal strPicture As String) As String
        Const DATE_TAKEN As Integer = &H9003
        Dim dateTaken As String = ""
        Using img As Image = Image.FromFile(strPicture)
            If img.PropertyIdList.Contains(DATE_TAKEN) Then
                Dim pitem As PropertyItem = img.GetPropertyItem(DATE_TAKEN)
                dateTaken = Encoding.UTF8.GetString(pitem.Value, 0, pitem.Value.Length)
            End If
        End Using
        Return dateTaken
    End Function

End Class

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Question by:XK8ER
2 Comments
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 35024194
Add a BackgroundWorker() and a ProgressBar() control to your form:
Imports System.IO
Imports System.Text
Imports System.Drawing.Imaging
Public Class Form1

    Private Class ProcessFolder
        Public Folder As String
        Public Pattern As String
    End Class

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If FolderBrowserDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
            Button1.Enabled = False
            ProgressBar1.Visible = True
            BackgroundWorker1.WorkerReportsProgress = True
            BackgroundWorker1.RunWorkerAsync(New ProcessFolder() With {.Folder = FolderBrowserDialog1.SelectedPath, .Pattern = "*.jpg"})
        End If
    End Sub

    Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim pf As ProcessFolder = CType(e.Argument, ProcessFolder)
        ProcessFiles(pf.Folder, pf.Pattern)
    End Sub

    Private Sub ProcessFiles(ByVal Folder As String, ByVal Pattern As String)
        Dim fi As FileInfo
        Dim di As New DirectoryInfo(Folder)
        Dim Files As New List(Of FileInfo)
        Files.AddRange(di.GetFiles(Pattern, SearchOption.AllDirectories))

        For i As Integer = 0 To Files.Count - 1
            BackgroundWorker1.ReportProgress(CInt(CDbl(i) / CDbl(Files.Count - 1) * CDbl(100)))
            fi = Files(i)
            Dim values() As String = FindDateTaken(fi.FullName).Split(":")
            If values.Length >= 2 Then
                values(2) = values(2).Split(" ")(0)
                Try
                    Dim dt As New DateTime(values(0), values(1), values(2))
                    Dim SubDi As New DirectoryInfo(Path.Combine(di.FullName, dt.Year))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If
                    SubDi = New DirectoryInfo(Path.Combine(SubDi.FullName, dt.Month.ToString("00")))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If
                    SubDi = New DirectoryInfo(Path.Combine(SubDi.FullName, dt.Day.ToString("00")))
                    If Not SubDi.Exists() Then
                        SubDi.Create()
                    End If

                    Dim NewFileName As String = Path.Combine(SubDi.FullName, fi.Name)
                    fi.MoveTo(NewFileName)
                Catch ex As Exception
                End Try
            End If
        Next
    End Sub

    Private Function FindDateTaken(ByVal strPicture As String) As String
        Const DATE_TAKEN As Integer = &H9003
        Dim dateTaken As String = ""
        Using img As Image = Image.FromFile(strPicture)
            If img.PropertyIdList.Contains(DATE_TAKEN) Then
                Dim pitem As PropertyItem = img.GetPropertyItem(DATE_TAKEN)
                dateTaken = Encoding.UTF8.GetString(pitem.Value, 0, pitem.Value.Length)
            End If
        End Using
        Return dateTaken
    End Function

    Private Sub BackgroundWorker1_ProgressChanged(ByVal sender As Object, ByVal e As System.ComponentModel.ProgressChangedEventArgs) Handles BackgroundWorker1.ProgressChanged
        ProgressBar1.Value = e.ProgressPercentage
    End Sub

    Private Sub BackgroundWorker1_RunWorkerCompleted(ByVal sender As Object, ByVal e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles BackgroundWorker1.RunWorkerCompleted
        MessageBox.Show("Done!")
        Button1.Enabled = True
        ProgressBar1.Visible = False
    End Sub

End Class

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by:XK8ER
ID: 35027346
beautiful.. perfection at its max.. thanks so much!
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