namespace Frame.ITextSharp
{
/// <summary>
/// iTextSharp导出数据源到PDF
/// </summary>
public static class ITextSharp_PDFHelper
{
/// <summary>
/// 导出Pdf
/// </summary>
/// <param name="localFilePath">文件保存路径</param>
/// <param name="dtSource">数据源</param>
/// <param name="HorV">页面横竖（为空表示竖，有非空值为横）</param>
public static void ExportPDF(string localFilePath, DataTable dtSource, string HorV)
{
iTextSharp.text.io.StreamUtil.AddToResourceSearch("iTextAsian.dll");
iTextSharp.text.io.StreamUtil.AddToResourceSearch("iTextAsianCmaps.dll");
BaseFont bf;
string basepath = Application.StartupPath;
try
{
bf = BaseFont.CreateFont(basepath + "\FONTS\STSONG.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
}
catch
{
bf = BaseFont.CreateFont("C:\WINDOWS\Fonts\STSONG.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
}
iTextSharp.text.Font font = new iTextSharp.text.Font(bf);
iTextSharp.text.Document pdf;
if (string.IsNullOrEmpty(HorV))
{
pdf = new iTextSharp.text.Document();
}
else
{
pdf = new iTextSharp.text.Document(PageSize.A4.Rotate());
}
PdfPTable table = new PdfPTable(dtSource.Columns.Count);
table.HorizontalAlignment = Element.ALIGN_CENTER;
PdfPCell cell;
for (int i = 0; i < dtSource.Rows.Count + 1; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
if (i == 0)
{
cell = new PdfPCell(new Phrase(dtSource.Columns[j].ColumnName, font));
}
else
{
cell = new PdfPCell(new Phrase(dtSource.Rows[i - 1][j].ToString(), font));
}
table.AddCell(cell);
}
}
using (FileStream fs = new FileStream(localFilePath, FileMode.Create, FileAccess.Write))
{
PdfWriter.GetInstance(pdf, fs);
pdf.Open();
pdf.Add(table);
pdf.Close();
}
}
/// <summary>
/// 提取PDF文件的文本内容
/// </summary>
/// <param name="pdfFilepath"></param>
/// <returns></returns>
public static string ReadPdfContent(string pdfFilepath)
{
try
{
PdfReader pdfReader = new PdfReader(pdfFilepath);
int numberOfPages = pdfReader.NumberOfPages;
string pfdText = string.Empty;
for (int i = 1; i <= numberOfPages; ++i)
{
//ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
//pfdText += PdfTextExtractor.GetTextFromPage(pdfReader, i, strategy);
byte[] bufferOfPageContent = pdfReader.GetPageContent(i);
pfdText += Encoding.UTF8.GetString(bufferOfPageContent);
}
pdfReader.Close();
return pfdText;
}
catch
{
return string.Empty;
}
}
/// <summary>
/// 添加倾斜水印
/// </summary>
/// <param name="pdfStream">pdf文件流</param>
/// <param name="iTextSharpTextWaterMarkPara">水印参数</param>
public static MemoryStream SetPdfTextWaterMark(MemoryStream pdfStream, ITextSharpTextWaterMarkPara iTextSharpTextWaterMarkPara)
{
try
{
int span = 40;//设置垂直位移
MemoryStream outStream = new MemoryStream();
PdfReader pdfReader = new PdfReader(pdfStream);
PdfStamper pdfStamper = new PdfStamper(pdfReader, outStream);
pdfStamper.Writer.CloseStream = false;
int total = pdfReader.NumberOfPages + 1;
PdfContentByte content;
BaseFont font = BaseFont.CreateFont(@"C:WINDOWSFontsSTCAIYUN.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);//华文云彩字体
PdfGState gs = new PdfGState();
gs.FillOpacity = iTextSharpTextWaterMarkPara.Alpha;//透明度
int waterMarkNameLenth = iTextSharpTextWaterMarkPara.WaterMarkText.Length;
char c;
int rise = 0;
string spanString = " ";//水平位移
for (int i = 1; i < total; i++)
{
rise = waterMarkNameLenth * span;
content = pdfStamper.GetOverContent(i);//在内容上方加水印
//content = pdfStamper.GetUnderContent(i);//在内容下方加水印
content.SetGState(gs);
content.BeginText();
content.SetColorFill(BaseColor.GREEN);
content.SetFontAndSize(font, iTextSharpTextWaterMarkPara.FontSize);
int heightNumbert = (int)Math.Ceiling((decimal)iTextSharpTextWaterMarkPara.Height / (decimal)rise);//垂直重复的次数，进一发
int panleWith = (iTextSharpTextWaterMarkPara.FontSize + span) * waterMarkNameLenth;
int widthNumber = (int)Math.Ceiling((decimal)iTextSharpTextWaterMarkPara.Width / (decimal)panleWith);//水平重复次数
// 设置水印文字字体倾斜 开始
for (int w = 0; w < widthNumber; w++)
{
for (int h = 1; h <= heightNumbert; h++)
{
int yleng = rise * h;
content.SetTextMatrix(w * panleWith, yleng);//x,y设置水印开始的绝对左边，以左下角为x，y轴的起点
for (int k = 0; k < waterMarkNameLenth; k++)
{
content.SetTextRise(yleng);//指定的y轴值处添加
c = iTextSharpTextWaterMarkPara.WaterMarkText[k];
content.ShowText(c + spanString);
yleng -= span;
}
}
}
content.EndText();
}
if (pdfStamper != null)
pdfStamper.Close();
if (pdfReader != null)
pdfReader.Close();
return outStream;
}
catch (Exception ex)
{
throw ex;
}
}
}
/// <summary>
///
/// </summary>
public class ITextSharpTextWaterMarkPara
{
/// <summary>
///
/// </summary>
public ITextSharpTextWaterMarkPara()
{
Width = 0;
Height = 0;
XCoordinate = 0;
YCoordinate = 0;
}
/// <summary>
/// 水印文本
/// </summary>
public string WaterMarkText { get; set; }
/// <summary>
/// 透明度：0,10%，20%。。。。。90%，100%
/// 0,0.1f,0.2f,。。。。。0.9f,1
/// </summary>
public float Alpha { get; set; }
/// <summary>
/// 旋转度数
/// </summary>
public float RotateDegree { get; set; }
/// <summary>
/// 字体大小
/// </summary>
public int FontSize { get; set; }
/// <summary>
/// PDF的左边距离
/// </summary>
public float Width { get; set; }
/// <summary>
/// PDF的上边距离
/// </summary>
public float Height { get; set; }
/// <summary>
/// X坐标
/// </summary>
public float XCoordinate { get; set; }
/// <summary>
/// Y坐标
/// </summary>
public float YCoordinate { get; set; }
}
}