try { var mergeFilePath = string.Format("{0}mergepdf.pdf", tempDownDir); PDFPrintHelper.MergePDFFile(pdfList, mergeFi

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:

 
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)

 
/// <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

 
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

try             {     var mergeFilePath = string.Format("{0}mergepdf.pdf", tempDownDir);                  PDFPrintHelper.MergePDFFile(pdfList, mergeFi
<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>
try             {     var mergeFilePath = string.Format("{0}mergepdf.pdf", tempDownDir);                  PDFPrintHelper.MergePDFFile(pdfList, mergeFi
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