winform 按顺序连续打印多个PDF文件
关于PDF打印的问题，前面有篇文章（点这里查看）也叙述过，今天来谈谈另外一种方法
其实方法很简单，因为需要把多个PDF文档按顺序连续打印，为此我们为什么不把要打印的pdf文档按顺序合并成一个PDF打印呢？如此就简单多了哦。
这里文章写出来并不是为了炫耀什么，只是觉得发现些好东西就分享出来而已，同时也做个记录，方便以后查找
开始正文
1、为了方便，打印方法就不另寻他路了，和前面一致，具体如下：
View Code
Process proc = new Process();
proc.StartInfo.CreateNoWindow = false;
proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
proc.StartInfo.UseShellExecute = true;
proc.StartInfo.FileName = itemPath;//打印文件路径（本地完整路径包括文件名和后缀名）
proc.StartInfo.Verb = "print";
proc.Start();
proc.Close();
2、就是重点了，合并PDF文档，方法很简单，网上一搜一大把，因为我的需求需要把jpg图片和pdf一起打印，因此合并方法中包含图片
使用此方法需要第三方控件iTextSharp.dll(点击这里下载)
View Code
/// <summary>
/// 把多个PDF文件和JPG/PNG图合并成一个PDF文档
/// </summary>
/// <param name="fileList">需要合并文件的完整路径列表</param>
/// <param name="outMergeFile">输出文件完整路径</param>
public static void MergePDFFile(List<string> fileList, string outMergeFile)
{
PdfReader reader;
Document document = new Document();
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outMergeFile, FileMode.Create));
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage newPage;
foreach (var itemFile in fileList)
{
if (!File.Exists(itemFile))
{
string fileName = Path.GetFileName(itemFile);
LogMessageWrite.WriteMessage(string.Format("文件打印合并__{0} 文件不存在", fileName));
continue;
}
FileInfo fInfo = new FileInfo(itemFile);
if (fInfo.Length < 1)
{
string fileName = Path.GetFileName(itemFile);
LogMessageWrite.WriteMessage(string.Format("文件打印合并__文件内容为空，无法打印，{0}", fileName));
return;
}
var ext = Path.GetExtension(itemFile).ToLower();
if (".pdf".Equals(ext))
{
reader = new PdfReader(itemFile);
int iPageNum = reader.NumberOfPages;
for (int j = 1; j <= iPageNum; j++)
{
document.NewPage();
newPage = writer.GetImportedPage(reader, j);
cb.AddTemplate(newPage, 0, 0);
}
}
else if (".jpg".Equals(ext) || ".jpge".Equals(ext) || ".png".Equals(ext))
{
FileStream rf = new FileStream(itemFile, FileMode.Open, FileAccess.Read);
int size = (int)rf.Length;
byte[] imext = new byte[size];
rf.Read(imext, 0, size);
rf.Close();
Image img = Image.GetInstance(imext);
//调整图片大小，使之适合A4
var imgHeight = img.Height;
var imgWidth = img.Width;
if (img.Height > iTextSharp.text.PageSize.A4.Height)
{
imgHeight = iTextSharp.text.PageSize.A4.Height;
}
if (img.Width > iTextSharp.text.PageSize.A4.Width)
{
imgWidth = iTextSharp.text.PageSize.A4.Width;
}
img.ScaleToFit(imgWidth, imgHeight);
//调整图片位置，使之居中
img.Alignment = iTextSharp.text.Image.ALIGN_MIDDLE;
document.NewPage();
document.Add(img);
}
}
document.Close();
}
3、打印合并后的文件
View Code
try
{
var mergeFilePath = string.Format("{0}mergepdf.pdf", tempDownDir);
PDFPrintHelper.MergePDFFile(pdfList, mergeFilePath);
Process proc = new Process();
proc.StartInfo.CreateNoWindow = false;
proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
proc.StartInfo.UseShellExecute = true;
proc.StartInfo.FileName = mergeFilePath;//打印文件路径（本地完整路径包括文件名和后缀名）
proc.StartInfo.Verb = "print";
proc.Start();
proc.Close();
}
catch (Exception ex)
{
LogMessageWrite.WriteMessage(ex.Message);
}
至此 大功告成
一、CSS兼容代码
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.transparent { filter:alpha(opacity=50); /* IE */ -moz-opacity:0.5; /* FireFox old version*/ -khtml-opacity: 0.5; /* Sarfari old version */ opacity: 0.5; /* FireFox */} |
二、Javascript兼容代码
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if (!window.jasen.core.Util) { window.jasen.core.Util = {}; } var $ = function (id) { return document.getElementById(id); } function style(element, key, value) { if (typeof element == "string") { element = $(element); } if (value) { element.style[key] = value; } else { return element.style[key]; } }; function opacity(element, /*0-100*/opacityValue) { var opacityValue = parseInt(opacityValue); style(element, "filter", "alpha(opacity=" + opacityValue + ")"); opacityValue /= 100.0; style(element, "MozOpacity", opacityValue); style(element, "KhtmlOpacity", opacityValue); style(element, "opacity", opacityValue); }; var Util = window.Util = window.jasen.core.Util; Util.opacity = opacity; Util.style = style; |
三、范例
<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <style type="text/css"> #content { width:300px; margin:20px auto; } </style> <script src="Scripts/jasen.Core.Util.js" type="text/javascript"></script> <script type="text/javascript"> window.onload = function () { var seletor = document.getElementById("opacitySeletor"); seletor.options.add(new Option("--请选择--", "100")); for (var i = 0; i <= 100; i++) { seletor.options.add(new Option(i, i)); } seletor.onmousewheel = function (event) { event = event || window.event; var currentIndex = seletor.selectedIndex - event.wheelDelta / 120; if (currentIndex < 0) { seletor.selectedIndex = seletor.options.length - 1; } else if (currentIndex > seletor.options.length - 1) { seletor.selectedIndex = 0; } else { seletor.selectedIndex = currentIndex; } seletor.onchange(); return false; } } function changeOpacity() { var element = document.getElementById("opacitySeletor"); if (element.selectedIndex < 0) { return; } var opacityValue = element[element.selectedIndex].value; if (opacityValue != "") { Util.opacity("opacityImg", opacityValue); } } </script> </head> <body> <form id="form1" runat="server"> <div> <div id="content"> <select id="opacitySeletor" onchange="return changeOpacity();"></select> <img id = "opacityImg" src="Images/car.jpg" title="car opacity" alt="car opacity" /> </div> </div> </form> </body> </html>