FileDialog.FileOk 事件
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
發生於使用者按一下 [檔案] 對話方塊上的 [開啟] 或 [儲存] 按鈕時。
public:
event System::ComponentModel::CancelEventHandler ^ FileOk;
public event System.ComponentModel.CancelEventHandler FileOk;
member this.FileOk : System.ComponentModel.CancelEventHandler
Public Custom Event FileOk As CancelEventHandler
事件類型
範例
下列程式碼範例示範如何使用 FileNames 屬性、處理 FileOk 事件,以及使用 Application.DoEvents 方法。 執行範例時,使用者可以從 OpenFileDialog 物件中選取圖形檔案。 選取的檔案會顯示在表單中。 方法 Application.DoEvents 會強制開啟每個圖形檔案的表單重繪。 若要執行此範例,請將下列程式碼貼到表單中, PictureBox 其中包含名為 的 、 OpenFileDialog 名為 PictureBox1
OpenFileDialog1
的 ,以及 Button 名為 fileButton
的 。
InitializePictureBox
從表單的建構函式或 Load
方法呼叫 和 InitializeOpenFileDialog
方法。 執行範例時,按一下按鈕來顯示對話方塊。
void InitializePictureBox()
{
this->PictureBox1 = gcnew System::Windows::Forms::PictureBox;
this->PictureBox1->BorderStyle =
System::Windows::Forms::BorderStyle::FixedSingle;
this->PictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;
this->PictureBox1->Location = System::Drawing::Point( 72, 112 );
this->PictureBox1->Name = "PictureBox1";
this->PictureBox1->Size = System::Drawing::Size( 160, 136 );
this->PictureBox1->TabIndex = 6;
this->PictureBox1->TabStop = false;
}
void InitializeOpenFileDialog()
{
this->OpenFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog;
// Set the file dialog to filter for graphics files.
this->OpenFileDialog1->Filter =
"Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
"All files (*.*)|*.*";
// Allow the user to select multiple images.
this->OpenFileDialog1->Multiselect = true;
this->OpenFileDialog1->Title = "My Image Browser";
}
void fileButton_Click( System::Object^ sender, System::EventArgs^ e )
{
OpenFileDialog1->ShowDialog();
}
// This method handles the FileOK event. It opens each file
// selected and loads the image from a stream into PictureBox1.
void OpenFileDialog1_FileOk( Object^ sender,
System::ComponentModel::CancelEventArgs^ e )
{
this->Activate();
array<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 ( String^ file in files )
{
System::IO::FileInfo^ fileInfo = gcnew System::IO::FileInfo( file );
System::IO::FileStream^ 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 );
}
PictureBox1->Image = nullptr;
}
private void InitializePictureBox()
{
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.pictureBox1.BorderStyle =
System.Windows.Forms.BorderStyle.FixedSingle;
this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
this.pictureBox1.Location = new System.Drawing.Point(72, 112);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(160, 136);
this.pictureBox1.TabIndex = 6;
this.pictureBox1.TabStop = false;
}
private void InitializeOpenFileDialog()
{
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
// Set the file dialog to filter for graphics files.
this.openFileDialog1.Filter =
"Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
"All files (*.*)|*.*";
// Allow the user to select multiple images.
this.openFileDialog1.Multiselect = true;
this.openFileDialog1.Title = "My Image Browser";
}
private void fileButton_Click(System.Object sender, System.EventArgs e)
{
openFileDialog1.ShowDialog();
}
// This method handles the FileOK event. It opens each file
// selected and loads the image from a stream into pictureBox1.
private void openFileDialog1_FileOk(object sender,
System.ComponentModel.CancelEventArgs e)
{
this.Activate();
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.
foreach (string file in files )
{
System.IO.FileInfo fileInfo = new System.IO.FileInfo(file);
System.IO.FileStream 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);
}
pictureBox1.Image = null;
}
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
備註
如需處理事件的資訊,請參閱 處理和引發事件。