首先是把 HTML 转换为图片。
public partial class Form1 : Form{public Form1(){InitializeComponent();}WebBrowser webBrowser = null;public void ConvertToImg(){webBrowser = new WebBrowser();//是否显式滚动条webBrowser.ScrollBarsEnabled = false;//加载HTML页面的地址webBrowser.Navigate("http://www.baidu.com");//页面加载完成执行事件webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);}private void webBrowser_DocumentCompleted(object sender, EventArgs e)//这个就是当网页载入完毕后要进行的操作{//获取解析后HTML的大小System.Drawing.Rectangle rectangle = webBrowser.Document.Body.ScrollRectangle;int width = rectangle.Width;int height = rectangle.Height;//设置解析后HTML的可视区域webBrowser.Width = width;webBrowser.Height = height;Bitmap bitmap = new System.Drawing.Bitmap(width, height);webBrowser.DrawToBitmap(bitmap, new System.Drawing.Rectangle(0, 0, width, height));//设置图片文件保存路径和图片格式,格式可以自定义string filePath = AppDomain.CurrentDomain.BaseDirectory + "../../SaveFIle/" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png";bitmap.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);}private void button1_Click(object sender, EventArgs e){ConvertToImg();}}
上面这种方法是解析指定URL地址的HTML,然后转换为图片。当然,也可以直接写一些HTML标签。如下:
View Code
public partial class Form1 : Form{public Form1(){InitializeComponent();}WebBrowser webBrowser = null;public void ConvertToImg(){string html = "<div><table border = \"1\" cellspacing = \"0\" cellpadding = \"3\" style = \"text-align:center;\"><tr><th style = \"width:60px;\">字段1</th><th style = \"width:60px;\">字段2</th><th style = \"width:60px;\">字段3</th></tr><tr style = \"color:green;\"><td>小明</td><td>22</td><td>185</td></tr><tr style = \"color:red;\"><td>小青</td><td>21</td><td>170</td></tr></table></div>";webBrowser = new WebBrowser();//是否显式滚动条webBrowser.ScrollBarsEnabled = false;//加载 htmlwebBrowser.DocumentText = html;//页面加载完成执行事件webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);}private void webBrowser_DocumentCompleted(object sender, EventArgs e)//这个就是当网页载入完毕后要进行的操作{//获取解析后HTML的大小System.Drawing.Rectangle rectangle = webBrowser.Document.Body.ScrollRectangle;int width = rectangle.Width;int height = rectangle.Height;//设置解析后HTML的可视区域webBrowser.Width = width;webBrowser.Height = height;Bitmap bitmap = new System.Drawing.Bitmap(width, height);webBrowser.DrawToBitmap(bitmap, new System.Drawing.Rectangle(0, 0, width, height));//设置图片文件保存路径和图片格式,格式可以自定义string filePath = AppDomain.CurrentDomain.BaseDirectory + "../../SaveFIle/" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png";bitmap.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);}private void button1_Click(object sender, EventArgs e){ConvertToImg();}}
然后把图片转换为PDF,这里需要用到 iTextSharp.dll 这个组件。
View Code
public partial class Form1 : Form{public Form1(){InitializeComponent();}WebBrowser webBrowser = null;public void ConvertToImg(){string html = "<div><table border = \"1\" cellspacing = \"0\" cellpadding = \"3\" style = \"text-align:center;\"><tr><th style = \"width:60px;\">字段1</th><th style = \"width:60px;\">字段2</th><th style = \"width:60px;\">字段3</th></tr><tr style = \"color:green;\"><td>小明</td><td>22</td><td>185</td></tr><tr style = \"color:red;\"><td>小青</td><td>21</td><td>170</td></tr></table></div>";webBrowser = new WebBrowser();//是否显式滚动条webBrowser.ScrollBarsEnabled = false;//加载 htmlwebBrowser.DocumentText = html;//页面加载完成执行事件webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);}private void webBrowser_DocumentCompleted(object sender, EventArgs e)//这个就是当网页载入完毕后要进行的操作{//获取解析后HTML的大小System.Drawing.Rectangle rectangle = webBrowser.Document.Body.ScrollRectangle;int width = rectangle.Width;int height = rectangle.Height;//设置解析后HTML的可视区域webBrowser.Width = width;webBrowser.Height = height;Bitmap bitmap = new System.Drawing.Bitmap(width, height);webBrowser.DrawToBitmap(bitmap, new System.Drawing.Rectangle(0, 0, width, height));//设置图片文件保存路径和图片格式,格式可以自定义string filePath = AppDomain.CurrentDomain.BaseDirectory + "../../SaveFIle/" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png";bitmap.Save(filePath, System.Drawing.Imaging.ImageFormat.Png);//创建PDFFileStream fileStream = new FileStream(AppDomain.CurrentDomain.BaseDirectory + "../../SaveFIle/" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".pdf", FileMode.Create);byte[] result = CreatePDF(bitmap, width, height);fileStream.Write(result, 0, result.Length);fileStream.Close();fileStream.Dispose();}private void button1_Click(object sender, EventArgs e){ConvertToImg();}public byte[] CreatePDF(Bitmap bitmap, int width, int height){using (MemoryStream ms = new MemoryStream()){Document doc = new Document(new iTextSharp.text.Rectangle(0, 0, width, height), 3, 3, 3, 3); // 左右上下PdfWriter writer = PdfWriter.GetInstance(doc, ms);writer.CloseStream = false;doc.Open();iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(bitmap, System.Drawing.Imaging.ImageFormat.Png);img.ScalePercent(100); // 放缩比例doc.Add(img); // 添加图片对像doc.Close();return ms.ToArray();}}}
不过这种生成图片之后再转成PDF,会造成像素的丢失,所以看起来要比图片模糊一点。
还有一种办法就是直接生成PDF,这里需要安装 ABCpdf。不过,这个是收费的。。。
View Code
public partial class Form1 : Form{public Form1(){InitializeComponent();}public void ConvertToPDF(){string html = "<div><table border = \"1\" cellspacing = \"0\" cellpadding = \"3\" style = \"text-align:center;\"><tr><th style = \"width:60px;\">字段1</th><th style = \"width:60px;\">字段2</th><th style = \"width:60px;\">字段3</th></tr><tr style = \"color:green;\"><td>小明</td><td>22</td><td>185</td></tr><tr style = \"color:red;\"><td>小青</td><td>21</td><td>170</td></tr></table></div>";//创建一个Doc对象Doc doc = new Doc();//Rect默认是文档整个页面大小,这里的Inset表示将Rect左右留出15的空白,上下留出20的空白doc.Rect.Inset(15, 20);//直接设置htmlint docID = doc.AddHtml(html);//设置URL//int docID = doc.AddImageUrl("http://www.baidu.com");//设置字体doc.AddFont("Arial");while (true){//判断是否还有内容if (!doc.Chainable(docID)){break;}//如果还有内容就添加一页doc.Page = doc.AddPage();//根据ID添加内容并返回页面上该内容对应的新IDdocID = doc.AddImageToChain(docID);}string filePath = AppDomain.CurrentDomain.BaseDirectory + "../../SaveFIle/" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".pdf";doc.Save(filePath);doc.Clear();doc.Dispose();}private void button1_Click(object sender, EventArgs e){ConvertToPDF();}}
