C#.NET将WEB页面导出生成pdf文件(支持外部CSS样式不缺失)
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将html文本或者html网页生成pdf,我常用的2种方式:TuesPechkin,wkhtmltopdf。 一、使用TuesPechkin转pdf 首先引用TuesPechkin.dll,我使用的是1.0.3,也可以使用最新稳定版: /// <summary> /// 将网页转为pdf文件 /// </summary> /// <param name="filePath">文件路径/目录</param> /// <param name="fileName">文件名</param> /// <param name="url">网页url</param> public bool ConvertWebpageToPDF(string filePath, string fileName, string url) { if (Directory.Exists(filePath) == false) Directory.createDirectory(filePath); try { HtmlToPdfDocument htmlToPdfDocument = new HtmlToPdfDocument(); GlobalSettings globalSettings = new GlobalSettings(); globalSettings.ProduceOutline = new bool?(true); double width = 100; double.TryParse(txt_width.Text, out width); double height = 120; double.TryParse(txt_height.Text, out height); double proportion = 1.26; width /= proportion; height = Math.Floor(height / proportion); string Width = width.ToString(); string Height = height.ToString(); globalSettings.PaperSize = new PechkinPaperSize(Width, Height); globalSettings.Margins.Top = 0; globalSettings.Margins.Right = 0; globalSettings.Margins.Bottom = 0; globalSettings.Margins.Left = 0; globalSettings.Margins.Unit = Unit.Centimeters; string pageUrl = url; ObjectSettings objectSettings = new ObjectSettings(); double value = 1; objectSettings.HtmlText = string.Empty; objectSettings.PageUrl = pageUrl; objectSettings.LoadSettings.BlockLocalFileAccess = true; objectSettings.LoadSettings.ZoomFactor = new double?(value); objectSettings.WebSettings.PrintMediaType = new bool?(true); objectSettings.WebSettings.PrintBackground = new bool?(false); htmlToPdfDocument.GlobalSettings = globalSettings; htmlToPdfDocument.Objects.Add(objectSettings); IPechkin pechkin = Factory.create(); byte[] array = pechkin.Convert(htmlToPdfDocument); string path = string.Empty; if (array == null) { return false; } path = Path.Combine(filePath, fileName); using (FileStream fileStream = new FileStream(path, FileMode.create)) { fileStream.Write(array, 0, array.Length); fileStream.Flush(); fileStream.Close(); FileStream fs = new FileStream(path, FileMode.Open); byte[] file = new byte[fs.Length]; fs.Read(file, 0, file.Length); fs.Close(); return true; } } catch (Exception ex) { return false; } }
二、使用wkhtmltopdf转pdf wkhtmltopdf是一个插件,首先要下载https://wkhtmltopdf.org/downloads.html 下载后有使用说明:需要使用cmd安装到本地目录 public void wkhtmltopdf(string filePath, string fileName, string url) { Process p = new Process(); string dllstr = AppDomain.CurrentDomain.BaseDirectory + "wkhtmltopdf\\wkhtmltopdf.exe"; if (System.IO.File.Exists(dllstr)) { string savepath = Path.Combine(filePath, fileName); p.StartInfo.FileName = dllstr; StringBuilder paramsBuilder = new StringBuilder(); paramsBuilder.Append("--page-width " + txt_width.Text + "mm "); paramsBuilder.Append("--zoom 1.2 "); paramsBuilder.Append("--disable-smart-shrinking "); paramsBuilder.Append("--page-height " + txt_height.Text + "mm "); paramsBuilder.Append("--margin-bottom 0mm "); paramsBuilder.Append("--margin-left 0mm "); paramsBuilder.Append("--margin-right 0mm "); paramsBuilder.Append("--margin-top 0mm "); paramsBuilder.AppendFormat("\"{0}\" \"{1}\"", url, savepath); p.StartInfo.Arguments = paramsBuilder.ToString(); p.StartInfo.UseShellexecute = false; p.StartInfo.RedirectStandardInput = true; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.RedirectStandardError = true; p.StartInfo.createNoWindow = true; p.Start(); p.WaitForExit(); } } 备注: 以上2种方法生成pdf效果都非常好,css也能完美支持。 都是通过请求网页url,将整个网页生成pdf。 如果你是客户端,只有html文本,没有网页,可以先用html文本在本地生成一个html文件,本地html文件也是可以生成的pdf的哦。 该文章在 2023/5/15 10:02:13 编辑过 |
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