日期:2014-05-17 浏览次数:20466 次
using System; using System.IO; using System.Text; using System.Collections; using System.Data; namespace aa { /// <summary> /// 导出PDF /// </summary> public class PDFGenerator { static float pageWidth = 594.0f; static float pageDepth = 828.0f; static float pageMargin = 30.0f; static float fontSize = 20.0f; static float leadSize = 10.0f; static StreamWriter pPDF = new StreamWriter("E:\\myPDF.pdf"); static MemoryStream mPDF = new MemoryStream(); private void ConvertToByteAndAddtoStream(string strMsg) { Byte[] buffer = null; buffer = ASCIIEncoding.ASCII.GetBytes(strMsg); mPDF.Write(buffer, 0, buffer.Length); buffer = null; } private string xRefFormatting(long xValue) { string strMsg = xValue.ToString(); int iLen = strMsg.Length; if (iLen < 10) { StringBuilder s = new StringBuilder(); int i = 10 - iLen; s.Append('0', i); strMsg = s.ToString() + strMsg; } return strMsg; } public void ExportPdf(DataTable dt) { ArrayList xRefs = new ArrayList(); //Byte[] buffer=null; float yPos = 0f; long streamStart = 0; long streamEnd = 0; long streamLen = 0; string strPDFMessage = null; //PDF文档头信息 strPDFMessage = "%PDF-1.1\n"; ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length); strPDFMessage = "1 0 obj\n"; ConvertToByteAndAddtoStream(strPDFMessage); strPDFMessage = " < < /Length 2 0 R >>\n"; ConvertToByteAndAddtoStream(strPDFMessage); strPDFMessage = "stream\n"; ConvertToByteAndAddtoStream(strPDFMessage); ////////PDF文档描述 streamStart = mPDF.Length; //字体 strPDFMessage = "BT\n/F0 " + fontSize + " Tf\n"; ConvertToByteAndAddtoStream(strPDFMessage); //PDF文档实体高度 yPos = pageDepth - pageMargin; strPDFMessage = pageMargin + " " + yPos + " Td\n"; ConvertToByteAndAddtoStream(strPDFMessage); strPDFMessage = leadSize + " TL\n"; ConvertToByteAndAddtoStream(strPDFMessage); //实体内容 for (int i = 0; i < dt.Rows.Count; i++) { for (int j = 0; j < dt.Columns.Count; j++) { strPDFMessage = "(" + dt.Rows[i][j].ToString() + ")Tj\n" + "\n"; ConvertToByteAndAddtoStream(strPDFMessage); } } strPDFMessage = "ET\n"; ConvertToByteAndAddtoStream(strPDFMessage); streamEnd = mPDF.Length; streamLen = streamEnd - streamStart; strPDFMessage = "endstream\nendobj\n"; ConvertToByteAndAddtoStream(strPDFMessage); //PDF文档的版本信息 xRefs.Add(mPDF.Length); strPDFMessage = "2 0 obj\n" + streamLen + "\nendobj\n"; ConvertToByteAndAddtoStream(strPDFMessage); xRefs.Add(mPDF.Length); strPDFMessage = "3 0 obj\n < </Type/Page/Parent 4 0 R/Conte