任何人都可以知道如何使用C#.
下面是我的代码，它正在检索PDF流并旋转图像，但我的问题是我们如何识别方向？
public static string ReadPdfFile(string fileName)
{
StringBuilder text = new StringBuilder();
if (File.Exists(fileName))
{
byte[] bytes = System.IO.File.ReadAllBytes(fileName);
using (MemoryStream ms = new MemoryStream())
{
Document doc = new Document();
PdfWriter writer = PdfWriter.GetInstance(doc, ms);
doc.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page;
PdfReader reader;
reader = new PdfReader(bytes);
int pages = reader.NumberOfPages;
// loop over document pages
for (int i = 1; i <= pages; i++)
{
page = writer.GetImportedPage(reader, i);
//Rectangle pagesize = …我有一个倒计时器,但是当我重新加载页面时倒计时从头开始倒计时.
这是我的HTML.
<!DOCTYPE html>
<html>
<head>
<title>DrugStore.pk | Under Construction</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="application/x-javascript"> addEventListener("load", function() { setTimeout(hideURLbar, 0); }, false); function hideURLbar(){ window.scrollTo(0,1); } </script>
<!--css-->
<link rel="stylesheet" href="css/style.css" type="text/css">
<link rel="stylesheet" href="css/jquery.countdown.css" />
<!--/css-->
<!--js-->
<script src="js/jquery.min.js"></script>
<script src="js/jquery.countdown.js"></script>
<script src="js/script.js"></script>
<!--js-->
<!-- webfonts -->
<link href='http://fonts.googleapis.com/css? family=Open+Sans:400,300,700,800' rel='stylesheet' type='text/css'>
<!-- webfonts -->
</head>
<body>
<div class="banner">
<div class="wrap">
<div class="banner-text">
<h1>Drug Store</h1>
<h2>Something awesome is coming your way !<br/>Our website is under construction but we …