Rendering Images Using C1FlashCanvas

To render images using the C1FlashCanvas class, complete the following tasks:

Note: You can draw any image which is supported by the .NET framework onto the C1FlashCanvas, since the Flash only supports JPEG and BMP, C1Flash does the necessary conversion if not supported (specifically, JPEG, BMP, GIF, TIFF, PHG, ICON and WMF).

Place an OpenFileDialog control, Button and Label control, and two RadioButton controls to the form.
Here is what the form will look like:

Add the following code to the Button_Click event handler:

To write code in Visual Basic

Visual Basic	Copy Code
Private Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click Me.OpenFileDialog1.InitialDirectory = Application.StartupPath Me.OpenFileDialog1.Filter = _ "All Image Files\|.png;.emf;wmf;tif;tiff;.gif;_ .jpg;.jpe;.jpeg;.bmp;.dib;.rle" & _ "\|BMP (.bmp;.dib;.rle)\|.bmp;.dib;.rle" & _ "\|JPEG (.jpg;.jpe;.jpeg)\|.jpg;.jpe;.jpeg" & _ "\|WMF(.wmf;.emf)\|.wmf;.emf" & _ "\|TIFF(.tif;tiff)\|.tif;tiff" & _ "\|GIF(.gif)\|.gif" & _ "\|PNG(.png)\|.png" & _ "\|ICON(.ico)\|.ico" If Me.OpenFileDialog1.ShowDialog() = DialogResult.OK Then ' Dim filename As String = Me.OpenFileDialog1.FileName.Trim() If Not (filename Is Nothing) And filename.Length > 0 Then Dim image As Image = Image.FromFile(filename) Me.C1FlashCanvas1.Clear(Color.White) Dim width As Single = image.Width Dim height As Single = image.Height If Me.rbBestFit.Checked Then Dim ratio As Single = CSng(image.Width) / CSng(image.Height) If image.Width > image.Height Then width = Me.C1FlashCanvas1.Width height = CInt(width / ratio) If height > Me.C1FlashCanvas1.Height Then height = Me.C1FlashCanvas1.Height width = height * ratio End If Else height = Me.C1FlashCanvas1.Height width = CInt(height * ratio) If width > Me.C1FlashCanvas1.Width Then width = Me.C1FlashCanvas1.Width height = width / ratio End If End If End If Dim x As Single = (Me.C1FlashCanvas1.Width - width) / 2 Dim y As Single = (Me.C1FlashCanvas1.Height - height) / 2 Me.C1FlashCanvas1.DrawImage(image, New RectangleF(x, y, width, height)) image.Dispose() Me.C1FlashCanvas1.RenderToFile("c:\WindowsApplication1.swf") LaunchViewer("c:\WindowsApplication1.swf") End If End If End Sub

Visual Basic

Copy Code

Private Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
   Me.OpenFileDialog1.InitialDirectory = Application.StartupPath
   Me.OpenFileDialog1.Filter = _
        "All Image Files|*.png;*.emf;*wmf;*tif;*tiff;*.gif;_
        *.jpg;*.jpe;*.jpeg;*.bmp;*.dib;*.rle" & _
        "|BMP (*.bmp;*.dib;*.rle)|*.bmp;*.dib;*.rle" & _
        "|JPEG (*.jpg;*.jpe;*.jpeg)|*.jpg;*.jpe;*.jpeg" & _
        "|WMF(*.wmf;*.emf)|*.wmf;*.emf" & _
        "|TIFF(*.tif;*tiff)|*.tif;*tiff" & _
        "|GIF(*.gif)|*.gif" & _
        "|PNG(*.png)|*.png" & _
        "|ICON(*.ico)|*.ico"
 
   If Me.OpenFileDialog1.ShowDialog() = DialogResult.OK Then '
           Dim filename As String = Me.OpenFileDialog1.FileName.Trim()
      If Not (filename Is Nothing) And filename.Length > 0 Then
         Dim image As Image = Image.FromFile(filename)
         Me.C1FlashCanvas1.Clear(Color.White)
         
         Dim width As Single = image.Width
         Dim height As Single = image.Height
         If Me.rbBestFit.Checked Then
            Dim ratio As Single = CSng(image.Width) / CSng(image.Height)
            If image.Width > image.Height Then
               width = Me.C1FlashCanvas1.Width
               height = CInt(width / ratio)
               
               If height > Me.C1FlashCanvas1.Height Then
                  height = Me.C1FlashCanvas1.Height
                  width = height * ratio
               End If
            Else
               height = Me.C1FlashCanvas1.Height
               width = CInt(height * ratio)
               
               If width > Me.C1FlashCanvas1.Width Then
                  width = Me.C1FlashCanvas1.Width
                  height = width / ratio
               End If
            End If
         End If
         
         Dim x As Single = (Me.C1FlashCanvas1.Width - width) / 2
         Dim y As Single = (Me.C1FlashCanvas1.Height - height) / 2
         
         Me.C1FlashCanvas1.DrawImage(image, New RectangleF(x, y, width, height))
         image.Dispose()
Me.C1FlashCanvas1.RenderToFile("c:\WindowsApplication1.swf")
        LaunchViewer("c:\WindowsApplication1.swf")
      End If
   End If
End Sub

To write code in C#

C#	Copy Code
private void button1_Click(object sender, System.EventArgs e) { this.openFileDialog1.InitialDirectory = Application.StartupPath; this.openFileDialog1.Filter = "All Image Files\|.png;.emf;wmf;tif;tiff;.gif;.jpg;.jpe;.jpeg;.bmp;.dib; .rle\|BMP(.bmp;.dib;.rle)\|.bmp;.dib;.rle\|JPEG(.jpg;.jpe;.jpeg) \|.jpg;.jpe;.jpeg\|WMF(.wmf;.emf)\|.wmf;.emf\|TIFF(.tif;tiff)\| .tif;tiff\|GIF(.gif)\|.gif\|PNG(.png)\|.png\|ICON(.ico)\|.ico"; if(this.openFileDialog1.ShowDialog() == DialogResult.OK) { string filename = this.openFileDialog1.FileName.Trim(); if (filename != null && filename.Length > 0) { Image image = Image.FromFile(filename); this.c1FlashCanvas1.Clear(Color.White); float width = image.Width; float height = image.Height; if (this.rbBestFit.Checked) { float ratio = (float)image.Width/(float)image.Height; if (image.Width > image.Height) { width = this.c1FlashCanvas1.Width; height = (int)(width/ratio); if (height > this.c1FlashCanvas1.Height) { height = this.c1FlashCanvas1.Height; width = height * ratio; } } else { height = this.c1FlashCanvas1.Height; width = (int)(height * ratio); if (width > this.c1FlashCanvas1.Width) { width = this.c1FlashCanvas1.Width; height = width / ratio; } } } float x = (this.c1FlashCanvas1.Width - width)/2; float y = (this.c1FlashCanvas1.Height - height)/2; this.c1FlashCanvas1.DrawImage(image, new RectangleF(x, y, width, height)); image.Dispose(); this.c1FlashCanvas1.RenderToFile(@"c:\WindowsApplication1.swf"); LaunchViewer(@"c:\WindowsApplication1.swf"); }

Copy Code

private void button1_Click(object sender, System.EventArgs e)
{
  this.openFileDialog1.InitialDirectory = Application.StartupPath;
  this.openFileDialog1.Filter = "All Image Files|*.png;*.emf;*wmf;*tif;*tiff;*.gif;*.jpg;*.jpe;*.jpeg;*.bmp;*.dib;
*.rle|BMP(*.bmp;*.dib;*.rle)|*.bmp;*.dib;*.rle|JPEG(*.jpg;*.jpe;*.jpeg)
|*.jpg;*.jpe;*.jpeg|WMF(*.wmf;*.emf)|*.wmf;*.emf|TIFF(*.tif;*tiff)|
*.tif;*tiff|GIF(*.gif)|*.gif|PNG(*.png)|*.png|ICON(*.ico)|*.ico";
  if(this.openFileDialog1.ShowDialog() == DialogResult.OK)
  {
    string filename = this.openFileDialog1.FileName.Trim();
    if (filename != null && filename.Length > 0)
    {
      Image image = Image.FromFile(filename);
      this.c1FlashCanvas1.Clear(Color.White);
 
      float width = image.Width;
      float height = image.Height;
      if (this.rbBestFit.Checked)
      {
         float ratio = (float)image.Width/(float)image.Height;
         if (image.Width > image.Height)
      {
         width = this.c1FlashCanvas1.Width;
         height = (int)(width/ratio);
 
         if (height > this.c1FlashCanvas1.Height)
        {
         height = this.c1FlashCanvas1.Height;
         width = height * ratio;
        }
     }
   else
     {
        height = this.c1FlashCanvas1.Height;
        width = (int)(height * ratio);
 
        if (width > this.c1FlashCanvas1.Width)
        {
         width = this.c1FlashCanvas1.Width;
         height = width / ratio;
        }
     }
}
 
float x = (this.c1FlashCanvas1.Width - width)/2;
float y = (this.c1FlashCanvas1.Height - height)/2;
 
this.c1FlashCanvas1.DrawImage(image, new RectangleF(x, y, width, height));
image.Dispose();
this.c1FlashCanvas1.RenderToFile(@"c:\WindowsApplication1.swf");
   LaunchViewer(@"c:\WindowsApplication1.swf");
}

Save and run your application.
Click the button.

This topic illustrates the following:

Here is what your chosen image (Best Fit and Actual Size, respectively) will look like: