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FileDialog.FileOk Event

Occurs when the user clicks on the Open or Save button on a file dialog box.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

'Declaration
Public Event FileOk As CancelEventHandler

For information about handling events, see Handling and Raising Events.

The following code example demonstrates using the FileNames property, handling the FileOk event and using the Application.DoEvents method. When the example runs, a user can select graphics files from an OpenFileDialog object. The selected files are displayed in the form. The Application.DoEvents method forces a repaint of the form for each graphics file opened. To run this example paste the following code in a form containing a PictureBox named PictureBox1, an OpenFileDialog named OpenFileDialog1, and a Button named fileButton. Call the InitializePictureBox and InitializeOpenFileDialog methods from the form's constructor or Load method. When the example is running, display the dialog box by clicking the button.

    Private Sub InitializePictureBox()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.PictureBox1.BorderStyle = _
            System.Windows.Forms.BorderStyle.FixedSingle
        Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
        Me.PictureBox1.Location = New System.Drawing.Point(72, 112)
        Me.PictureBox1.Name = "PictureBox1" 
        Me.PictureBox1.Size = New System.Drawing.Size(160, 136)
        Me.PictureBox1.TabStop = False 
    End Sub 

    Private Sub InitializeOpenFileDialog()
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog

        ' Set the file dialog to filter for graphics files. 
        Me.OpenFileDialog1.Filter = _
        "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*" 

        ' Allow the user to select multiple images. 
        Me.OpenFileDialog1.Multiselect = True 
        Me.OpenFileDialog1.Title = "My Image Browser" 
    End Sub 

    Private Sub fileButton_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles FileButton.Click
        OpenFileDialog1.ShowDialog()
    End Sub 


    ' This method handles the FileOK event.  It opens each file  
    ' selected and loads the image from a stream into PictureBox1. 
    Private Sub OpenFileDialog1_FileOk(ByVal sender As Object, _
    ByVal e As System.ComponentModel.CancelEventArgs) _
     Handles OpenFileDialog1.FileOk

        Me.Activate()
        Dim file, files() As String
        files = OpenFileDialog1.FileNames

        ' Open each file and display the image in PictureBox1. 
        ' Call Application.DoEvents to force a repaint after each 
        ' file is read.         
        For Each file In files
            Dim fileInfo As System.IO.FileInfo = New System.IO.FileInfo(file)
            Dim fileStream As System.IO.FileStream = fileInfo.OpenRead()
            PictureBox1.Image = System.Drawing.Image.FromStream(fileStream)
            Application.DoEvents()
            fileStream.Close()

            ' Call Sleep so the picture is briefly displayed,  
            'which will create a slide-show effect.
            System.Threading.Thread.Sleep(2000)
        Next
        PictureBox1.Image = Nothing 
    End Sub

To run this example paste the following code in a form containing
a PictureBox named PictureBox1, an OpenFileDialog named OpenFileDialog1, 
and a button named fileButton.  Call the InitializePictureBox and 
InitializeOpenFileDialog methods from the form's constructor or 
Load method. When the example is running, display the dialog by clicking
the button.    

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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