/// <summary>
/// Exports the chart to the specified output stream as binary. When
/// exporting to a web response the WriteToHttpResponse() method is likely
/// preferred.
/// </summary>
/// <param name="outputStream">An output stream.</param>
internal void WriteToStream(Stream outputStream)
{
switch (this.ContentType)
{
case "image/jpeg":
CreateSvgDocument(this.Svg).Draw().Save(
outputStream,
ImageFormat.Jpeg);
break;
case "image/png":
// PNG output requires a seekable stream.
using (MemoryStream seekableStream = new MemoryStream())
{
CreateSvgDocument(this.Svg).Draw().Save(
seekableStream,
ImageFormat.Png);
seekableStream.WriteTo(outputStream);
}
break;
case "application/pdf":
List <SvgDocument> svgDocs = CreateSvgDocuments(this.Svgs);
// Create PDF document.
using (Document pdfDoc = new Document())
{
// Scalar to convert from 72 dpi to 150 dpi.
float dpiScalar = 150f / 72f;
// Set page size. Page dimensions are in 1/72nds of an inch.
// Page dimensions are scaled to boost dpi and keep page
// dimensions to a smaller size.
pdfDoc.SetPageSize(new Rectangle(
svgDocs[0].Width / dpiScalar,
svgDocs[0].Height / dpiScalar));
// Set margin to none.
pdfDoc.SetMargins(0f, 0f, 0f, 0f);
// Create PDF writer to write to response stream.
using (PdfWriter pdfWriter = PdfWriter.GetInstance(
pdfDoc,
outputStream))
{
// Configure PdfWriter.
pdfWriter.SetPdfVersion(PdfWriter.PDF_VERSION_1_5);
pdfWriter.CompressionLevel = PdfStream.DEFAULT_COMPRESSION;
// Add meta data.
pdfDoc.AddCreator(PdfMetaCreator);
pdfDoc.AddTitle(this.Name);
// Output PDF document.
pdfDoc.Open();
pdfDoc.NewPage();
foreach (SvgDocument svgDoc in svgDocs)
{
// Create image element from SVG image.
Image image = Image.GetInstance(svgDoc.Draw(), ImageFormat.Bmp);
image.CompressionLevel = PdfStream.DEFAULT_COMPRESSION;
// Must match scaling performed when setting page size.
image.ScalePercent(100f / dpiScalar);
// Add image element to PDF document.
pdfDoc.Add(image);
}
pdfDoc.CloseDocument();
}
}
break;
case "image/svg+xml":
using (StreamWriter writer = new StreamWriter(outputStream))
{
writer.Write(string.Join(",", this.Svgs));
writer.Flush();
}
break;
case "application/msword":
case "application/vnd.openxmlformats-officedocument.wordprocessingml.document":
WordGenerator.CreateDocStreamBySvgs(CreateSvgDocuments(this.Svgs), outputStream);
break;
//case "application/vnd.ms-powerpoint":
// break;
case "application/vnd.openxmlformats-officedocument.presentationml.presentation":
PowerPointGenerator.CreatePowerPointXStreamBySvgs(CreateSvgDocuments(this.Svgs), outputStream);
break;
case "application/vnd.ms-excel":
if (this.Table == null)
{
ExcelGenerator.CreateExcelStreamBySvgs(CreateSvgDocuments(this.Svgs), outputStream);
}
else
{
ExcelGenerator.CreateExcelWithTableStreamBySvg(CreateSvgDocument(this.Svg), outputStream, this.Table);
}
break;
case "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet":
if (this.Table == null)
{
ExcelGenerator.CreateExcelXStreamBySvgs(CreateSvgDocuments(this.Svgs), outputStream);
}
else
{
ExcelGenerator.CreateExcelXWithTableStreamBySvg(CreateSvgDocument(this.Svg), outputStream, this.Table);
}
break;
break;
default:
throw new InvalidOperationException(string.Format(
"ContentType '{0}' is invalid.", this.ContentType));
}
outputStream.Flush();
}
