csharp: Cyotek.GhostScript.Pdf Conversion pdf convert image

from:https://www.ghostscript.com/download/gsdnld.html

https://www.codeproject.com/Articles/317700/Convert-a-PDF-into-a-series-of-images-using-Csharp

https://www.cyotek.com/blog/convert-a-pdf-into-a-series-of-images-using-csharp-and-ghostscript

https://github.com/mephraim/ghostscriptsharp   gsdll32.dll，有32位和64位的。把它放在相应的BIN文件夹下。

 https://archive.codeplex.com/?p=ghostscriptnet

https://archive.codeplex.com/?p=ghostscriptstudio

把gsdll32.dll 放在BIN下

 

Safari for Windows 5.1.7 http://appldnld.apple.com/Safari5/041-5487.20120509.INU8B/SafariSetup.exe

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<form id="form1" runat="server"> <div>     <p>         <asp:LinkButton runat="server" ID="previousLinkButton" Text="Previous" OnClick="previousLinkButton_Click" />         <asp:LinkButton runat="server" ID="nextLinkButton" Text="Next" OnClick="nextLinkButton_Click" />     </p>     <p>         <asp:Image runat="server" ID="pdfImage" ImageUrl="~/PdfImage.ashx?fileName=sample.pdf&page=1" />     </p> </div> </form>

　　

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/// <summary>   ///   /// </summary> public partial class _Default : System.Web.UI.Page {         /// <summary>     ///     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>   protected void previousLinkButton_Click(object sender, EventArgs e)   {     this.IncrementPage(-1);   }     /// <summary>     ///     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>   protected void nextLinkButton_Click(object sender, EventArgs e)   {     this.IncrementPage(1);   }   /// <summary>   /// /   /// </summary>   /// <param name="increment"></param>   private void IncrementPage(int increment)   {     NameValueCollection queryString;     int pageNumber;     string pdfFileName;     Pdf2Image converter;       queryString = HttpUtility.ParseQueryString(pdfImage.ImageUrl.Substring(pdfImage.ImageUrl.IndexOf("?")));     pdfFileName = queryString["fileName"];     pageNumber = Convert.ToInt32(queryString["page"]) + increment;     converter = new Pdf2Image(this.Server.MapPath("~/" + pdfFileName));       if (pageNumber > 0 && pageNumber <= converter.PageCount)       pdfImage.ImageUrl = string.Format("~/PdfImage.ashx?fileName={0}&page={1}", pdfFileName, pageNumber);   }

　　

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using System; using System.Drawing; using System.Drawing.Imaging; using System.Web; using Cyotek.GhostScript.PdfConversion;   namespace GhostScriptWebTest {   public class PdfImage : IHttpHandler   {     public void ProcessRequest(HttpContext context)     {       string fileName;       int pageNumber;       Pdf2Image convertor;       Bitmap image;         fileName = context.Server.MapPath("~/" + context.Request.QueryString["fileName"]);       pageNumber = Convert.ToInt32(context.Request.QueryString["page"]);         // convert the image       convertor = new Pdf2Image(fileName);       image = convertor.GetImage(pageNumber);         // set the content type       context.Response.ContentType = "image/jpeg";// "image/png";         // save the image directly to the response stream       image.Save(context.Response.OutputStream, ImageFormat.Jpeg);  //     }       public bool IsReusable     { get { return true; } }   } }

　　

	IE6	IE 8.0	Chrome	Firefox
png	image/x-png	image/x-png	image/png	image/png
jpg	image/pjpeg	image/jpeg	image/jpeg	image/jpeg
jpeg	image/pjpeg	image/pjpeg	image/jpeg	image/jpeg
bmp	image/bmp	image/bmp	image/bmp	image/bmp