protected void SaveImage()
{
string savedImageFileName = "";
FormatEncoderParams formatEncoderParams = null;
object source = null;
switch (this.ddlSourceType.SelectedIndex)
{
case 0:
// File system
source = this.imgLoaded.ImageUrl;
break;
case 1:
// Byte array
source = System.IO.File.ReadAllBytes(Server.MapPath(this.imgLoaded.ImageUrl));
break;
case 2:
// Stream
source = System.IO.File.OpenRead(Server.MapPath(this.imgLoaded.ImageUrl));
// Note: The stream will be automatically closed/disposed by the LoadedImage class
break;
}
using (LoadedImage loadedImage = ImageArchiver.LoadImage(source))
{
switch (this.ddlImageFormat.SelectedValue)
{
case "Auto":
formatEncoderParams = ImageArchiver.GetDefaultFormatEncoderParams();
break;
case "JPEG":
formatEncoderParams = new JpegFormatEncoderParams(int.Parse(this.txtJpegQuality.Text));
break;
case "GIF":
GifFormatEncoderParams gifFormatEncoderParams = new GifFormatEncoderParams();
formatEncoderParams = gifFormatEncoderParams;
gifFormatEncoderParams.QuantizeImage = this.cbGifQuantize.Checked;
if (this.cbGifQuantize.Checked)
{
gifFormatEncoderParams.MaxColors = int.Parse(this.ddlGifMaxColors.SelectedValue);
}
break;
case "PNG":
PngFormatEncoderParams pngformatEncoderParams = new PngFormatEncoderParams();
formatEncoderParams = pngformatEncoderParams;
pngformatEncoderParams.ConvertToIndexed = this.cbPngConvertToIndex.Checked;
if (this.cbPngConvertToIndex.Checked)
{
pngformatEncoderParams.MaxColors = int.Parse(this.ddlPngMaxColors.SelectedValue);
}
break;
}
savedImageFileName = "~/repository/output/Ex_A_103" + formatEncoderParams.FileExtension;
// IMPORTANT NOTE: Apply a Noop (No Operation) filter to prevent a known GDI+ problem with transparent images
// Example: http://forums.asp.net/t/1235100.aspx
switch (this.ddlOutputType.SelectedIndex)
{
case 0:
// File system
new NoopFilter().SaveProcessedImageToFileSystem(loadedImage.Image, savedImageFileName, formatEncoderParams);
break;
case 1:
// Byte array
byte[] imageBytes = new NoopFilter().SaveProcessedImageToByteArray(loadedImage.Image, formatEncoderParams);
System.IO.File.WriteAllBytes(Server.MapPath(savedImageFileName), imageBytes);
break;
case 2:
// Stream
using (System.IO.Stream stream = System.IO.File.OpenWrite(Server.MapPath(savedImageFileName)))
{
new NoopFilter().SaveProcessedImageToStream(loadedImage.Image, stream, formatEncoderParams);
}
break;
}
}
// Update the displayed image (add a timestamp parameter to the query URL to ensure that the image is reloaded by the browser)
this.imgSaved.ImageUrl = savedImageFileName + "?timestamp=" + DateTime.UtcNow.Ticks.ToString();
this.phOutputPreview.Visible = true;
// Display extension and size of both files
this.litLoadedImageFileDetails.Text = System.IO.Path.GetExtension(this.imgLoaded.ImageUrl).ToUpper() + " file (" + (new System.IO.FileInfo(Server.MapPath(this.imgLoaded.ImageUrl))).Length.ToString() + " bytes)";
this.litSavedImageFileDetails.Text = System.IO.Path.GetExtension(savedImageFileName).ToUpper() + " file (" + (new System.IO.FileInfo(Server.MapPath(savedImageFileName))).Length.ToString() + " bytes)";
}
protected void SaveImage()
{
string savedImageFileName = "";
FormatEncoderParams formatEncoderParams = null;
object source = null;
switch (this.ddlSourceType.SelectedIndex)
{
case 0:
// File system
source = this.imgLoaded.ImageUrl;
break;
case 1:
// Byte array
source = System.IO.File.ReadAllBytes(Server.MapPath(this.imgLoaded.ImageUrl));
break;
case 2:
// Stream
source = System.IO.File.OpenRead(Server.MapPath(this.imgLoaded.ImageUrl));
// Note: The stream will be automatically closed/disposed by the LoadedImage class
break;
}
using (LoadedImage loadedImage = ImageArchiver.LoadImage(source))
{
switch(this.ddlImageFormat.SelectedValue)
{
case "Auto":
formatEncoderParams = ImageArchiver.GetDefaultFormatEncoderParams();
break;
case "JPEG":
formatEncoderParams = new JpegFormatEncoderParams(int.Parse(this.txtJpegQuality.Text));
break;
case "GIF":
GifFormatEncoderParams gifFormatEncoderParams = new GifFormatEncoderParams();
formatEncoderParams = gifFormatEncoderParams;
gifFormatEncoderParams.QuantizeImage = this.cbGifQuantize.Checked;
if (this.cbGifQuantize.Checked)
{
gifFormatEncoderParams.MaxColors = int.Parse(this.ddlGifMaxColors.SelectedValue);
}
break;
case "PNG":
PngFormatEncoderParams pngformatEncoderParams = new PngFormatEncoderParams();
formatEncoderParams = pngformatEncoderParams;
pngformatEncoderParams.ConvertToIndexed = this.cbPngConvertToIndex.Checked;
if (this.cbPngConvertToIndex.Checked)
{
pngformatEncoderParams.MaxColors = int.Parse(this.ddlPngMaxColors.SelectedValue);
}
break;
}
savedImageFileName = "~/repository/output/Ex_A_103" + formatEncoderParams.FileExtension;
// IMPORTANT NOTE: Apply a Noop (No Operation) filter to prevent a known GDI+ problem with transparent images
// Example: http://forums.asp.net/t/1235100.aspx
switch (this.ddlOutputType.SelectedIndex)
{
case 0:
// File system
new NoopFilter().SaveProcessedImageToFileSystem(loadedImage.Image, savedImageFileName, formatEncoderParams);
break;
case 1:
// Byte array
byte[] imageBytes = new NoopFilter().SaveProcessedImageToByteArray(loadedImage.Image, formatEncoderParams);
System.IO.File.WriteAllBytes(Server.MapPath(savedImageFileName), imageBytes);
break;
case 2:
// Stream
using (System.IO.Stream stream = System.IO.File.OpenWrite(Server.MapPath(savedImageFileName)))
{
new NoopFilter().SaveProcessedImageToStream(loadedImage.Image, stream, formatEncoderParams);
}
break;
}
}
// Update the displayed image (add a timestamp parameter to the query URL to ensure that the image is reloaded by the browser)
this.imgSaved.ImageUrl = savedImageFileName + "?timestamp=" + DateTime.UtcNow.Ticks.ToString();
this.phOutputPreview.Visible = true;
// Display extension and size of both files
this.litLoadedImageFileDetails.Text = System.IO.Path.GetExtension(this.imgLoaded.ImageUrl).ToUpper() + " file (" + (new System.IO.FileInfo(Server.MapPath(this.imgLoaded.ImageUrl))).Length.ToString() + " bytes)";
this.litSavedImageFileDetails.Text = System.IO.Path.GetExtension(savedImageFileName).ToUpper() + " file (" + (new System.IO.FileInfo(Server.MapPath(savedImageFileName))).Length.ToString() + " bytes)";
}
