public static void PreViewPage(object sender, PrintPageEventArgs e, PdfiumViewer.PdfDocument pdfDocument, ref int?pages)
{
PageSettings settings = e.PageSettings;
var paperHeight = settings.PaperSize.Height;
var paperWidth = settings.PaperSize.Width;
int margin = 10;
var imgHeight = 0;
var imgWidth = 0;
//int? pages = 0;
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if ((double)image.Width / (double)image.Height > (double)paperWidth / (double)paperHeight) // 图片等比例放大，宽度超出了，先确定宽度
{
imgWidth = (int)(paperWidth - margin * 2);
imgHeight = (int)((double)image.Height * (double)imgWidth / (double)image.Width - margin * 2);
}
else
{
imgHeight = (int)(paperHeight - margin * 2);
imgWidth = (int)((double)image.Width / (double)image.Height * imgHeight - margin * 2);
}
e.Graphics.DrawImage(image, margin, margin, imgWidth, imgHeight);
}
if (pages < pdfDocument.PageCount - 1)
{
e.HasMorePages = true; //HaeMorePages属性为True时，PrintPage的回调函数就会被再次调用，打印一个页面。
pages++;
}
else
{
//预览界面点击打印需要把索引重新初始化
pages = 0;
}
}
public static void PreViewPage(object sender, PrintPageEventArgs e, PdfiumViewer.PdfDocument pdfDocument, string direction, ref int?pages)
{
PageSettings settings = e.PageSettings;
var paperHeight = settings.PaperSize.Height;
var paperWidth = settings.PaperSize.Width;
int margin = 10;
var imgHeight = 0;
var imgWidth = 0;
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
ImageScaling(image, paperHeight, paperWidth, margin, direction, ref imgHeight, ref imgWidth);
if (direction == "2") //2:横向打印（html转pdf的有问题，html转pdf不考虑宽度，转出来标准的pdf页，分页也已经完成，在这部分就处理不了）
{
e.Graphics.TranslateTransform(0, paperHeight); //旋转原点
e.Graphics.RotateTransform(-90.0F); //旋转角度
}
e.Graphics.DrawImage(image, margin, margin, imgWidth, imgHeight);
}
if (pages < pdfDocument.PageCount - 1)
{
e.HasMorePages = true; //HaeMorePages属性为True时，PrintPage的回调函数就会被再次调用，打印一个页面。
pages++;
}
else
{
//预览界面点击打印需要把索引重新初始化
pages = 0;
}
}
/// <summary>
/// Определить кол-во страниц документа с помошью pdfSharp
/// </summary>
/// <param name="doc"></param>
/// <returns></returns>
public int GetCountPages(Document doc)
{
int pageCount = 0;
PdfiumViewer.PdfDocument documentV = PdfiumViewer.PdfDocument.Load(doc.File.FullName);
pageCount = documentV.PageCount;
return(pageCount);
}
private void DocForm_Load(object sender, EventArgs e)
{
try
{
PdfiumViewer.PdfDocument pdfDocs = PdfiumViewer.PdfDocument.Load(this, FilePath);
pdfviewer.Document = pdfDocs;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private async Task LoadPdf(PdfFile pdf)
{
try
{
PdfiumViewer.PdfDocument doc = await Task.Run(() =>
{
return(PdfiumViewer.PdfDocument.Load(pdf.GetFullPath()));
});
pdfViewer.Document?.Dispose();
pdfViewer.Document = doc;
CurrentPdf = pdf;
}
catch (Exception ex)
{
Trace.Fail(ex.ToString());
}
}
private BitmapImage GetPdfPageImage(PdfiumViewer.PdfDocument pDoc, int pageNum)
{
BitmapImage image = new BitmapImage();
Bitmap img;
MemoryStream stream = new MemoryStream();
img = (Bitmap)pDoc.Render(pageNum, 96.0f, 96.0f, true);
img.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = stream;
image.EndInit();
image.Freeze();
return(image);
}
public Sprite GetPage(PdfiumViewer.PdfDocument doc, int pageNum)
{
if (pageNum >= doc.PageCount)
{
return(null);
}
var tempPath = Application.persistentDataPath + _targetFolder + "_tempImage_.png";
if (FileBrowserHelpers.FileExists(tempPath))
{
FileBrowserHelpers.DeleteFile(tempPath);
}
var image = doc.Render(pageNum, 72, 72, false);
image.Save(tempPath, System.Drawing.Imaging.ImageFormat.Png);
var sprite = LoadSprite(tempPath);
return(sprite);
}
private List <BitmapImage> GetPdfPageImages(string fName)
{
BitmapImage img;
List <BitmapImage> images = new List <BitmapImage>();
PdfiumViewer.PdfDocument pDoc = PdfiumViewer.PdfDocument.Load(fName);
for (int i = 0; i < pDoc.PageCount; i++)
{
img = GetPdfPageImage(pDoc, i);
if (img != null)
{
images.Add(img);
}
else
{
images.Add(new BitmapImage());
}
}
pDoc.Dispose();
return(images);
}
public static void Pdf2Jpg(PdfiumViewer.PdfDocument pdfDocument, string targetPath, int?pages, string folderName)
{
if (string.IsNullOrEmpty(targetPath))
{
throw new ArgumentNullException("targetPath");
}
var dir = Path.GetDirectoryName(targetPath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
if (pdfDocument.PageCount == 1)
{
pages = 1;
}
var imageDir = Path.Combine(dir, string.IsNullOrEmpty(folderName) ? Guid.NewGuid().ToString() : folderName);
Directory.CreateDirectory(imageDir);
if (pages != null)
{
pages--;//PdfiumViewer.PdfDocument的页数是从0开始的
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if (ConfigDefine.Pdf2JpgScaleRatio != 0)
{
Stream imageStream = new MemoryStream();
image.Save(imageStream, ImageFormat.Jpeg);
int imgWidth = Convert.ToInt32(image.Width * ConfigDefine.Pdf2JpgScaleRatio);
int imgHeight = Convert.ToInt32(image.Height * ConfigDefine.Pdf2JpgScaleRatio);
using (var imgScaleStream = ImageScale2Stream(imageStream, imgWidth, imgHeight, ""))
{
using (var imgScale = System.Drawing.Image.FromStream(imgScaleStream))
{
imgScale.Save(Path.Combine(imageDir, folderName + ".jpg"));
//imgScale.Save(targetPath);
}
}
}
else
{
image.Save(Path.Combine(imageDir, folderName + ".jpg"));
//image.Save(targetPath);
}
}
}
else
{
for (pages = 0; pages < pdfDocument.PageCount; pages++)
{
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if (ConfigDefine.Pdf2JpgScaleRatio != 0)
{
Stream imageStream = new MemoryStream();
image.Save(imageStream, ImageFormat.Jpeg);
int imgWidth = Convert.ToInt32(image.Width * ConfigDefine.Pdf2JpgScaleRatio);
int imgHeight = Convert.ToInt32(image.Height * ConfigDefine.Pdf2JpgScaleRatio);
using (var imgScaleStream = ImageScale2Stream(imageStream, imgWidth, imgHeight, ""))
{
using (var imgScale = System.Drawing.Image.FromStream(imgScaleStream))
{
imgScale.Save(Path.Combine(imageDir, pages + ".jpg"));
}
}
}
else
{
image.Save(Path.Combine(imageDir, pages + ".jpg"));
}
}
}
//图片拼接
//MergerImage(imageDir, targetPath);
/*
* try
* {
* //删除文件夹
* Directory.Delete(imageDir, true);
* }
* catch (Exception ex)
* {
* //Send(string.Format("删除临时目录出错：{0};其他错误信息：{1}", imageDir, ex));
* throw new ArgumentNullException(string.Format("删除临时目录出错：{0};其他错误信息：{1}", imageDir, ex));
* }
* */
}
}
public static void Pdf2Jpg(PdfiumViewer.PdfDocument pdfDocument, string targetPath, int?pages)
{
Pdf2Jpg(pdfDocument, targetPath, pages, "");
}
private void modifyPDF(string path)
{
string output = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\DocAuth";
//string output = Directory.GetCurrentDirectory() + "\\pdfcache";
if (!Directory.Exists(output))
{
Directory.CreateDirectory(output);
}
#region clean Existing cache files
System.IO.DirectoryInfo di = new DirectoryInfo(output);
foreach (FileInfo file in di.GetFiles())
{
file.Delete();
}
foreach (DirectoryInfo dir in di.GetDirectories())
{
dir.Delete(true);
}
#endregion
_documentLastGuid = Guid.NewGuid();
string uId = _documentLastGuid.ToString();
using (Stream inputPdfStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (Stream outputPdfStream = new FileStream(output + uId + ".pdf", FileMode.Create, FileAccess.Write, FileShare.None))
{
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(uId, QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);
string QRSize = System.Configuration.ConfigurationManager.AppSettings["QRSize"];
int QRCodeSize = 1;
if (!string.IsNullOrWhiteSpace(QRSize) && int.TryParse(QRSize, out QRCodeSize))
{
QRCodeSize = Convert.ToInt32(QRSize);
}
Bitmap qrCodeImage = qrCode.GetGraphic(1);
string storeQRCode = System.Configuration.ConfigurationManager.AppSettings["storeQRCode"];
bool storeQRCodeBoolean = false;
if (!string.IsNullOrWhiteSpace(storeQRCode) && bool.TryParse(storeQRCode, out storeQRCodeBoolean))
{
storeQRCodeBoolean = Convert.ToBoolean(storeQRCode);
}
if (storeQRCodeBoolean)
{
Bitmap qrCodeImageSave = qrCode.GetGraphic(20);
qrCodeImageSave.Save(output + uId + ".png");
}
PdfReader reader = new PdfReader(inputPdfStream);
PdfStamper stamper = new PdfStamper(reader, outputPdfStream);
Image image = Image.GetInstance(qrCodeImage, ImageFormat.Bmp);
float qrWidth = image.Width;
for (int i = 1; i <= reader.NumberOfPages; i++)
{
PdfContentByte pdfContentByte = stamper.GetOverContent(i);
image.SetAbsolutePosition(pdfContentByte.PdfDocument.PageSize.Width - qrWidth, 0);
pdfContentByte.AddImage(image);
var image2 = Image.GetInstance(Properties.Resources.docscanstamp, ImageFormat.Png);
image2.ScaleAbsolute(130f, 20f);
image2.SetAbsolutePosition((pdfContentByte.PdfDocument.PageSize.Width - (qrWidth + 140)), 5);
pdfContentByte.AddImage(image2);
}
stamper.Close();
PdfiumViewer.PdfDocument pdfDocs = PdfiumViewer.PdfDocument.Load(this, output + uId + ".pdf");
uploadedFile = output + uId + ".pdf";
fileName = Path.GetFileName(path);
pdfviewer.Document = pdfDocs;
}
}
void View(string fileName)
{
documentV = PdfiumViewer.PdfDocument.Load(fileName);
pdfRenderer.Load(documentV);
}
