Ghostscript.NET pdf图像无法在windows azure上工作

时间:2015-08-10 10:05:26

标签: c# asp.net pdf azure ghostscript.net

我正在尝试使用Ghostscript.NET将pdf第一页转换为图像,但它在本地IIS上正常工作但在Azure网络应用上失败并出现以下错误:

  

[GhostscriptException:导出函数的委托不能   为符号'gsapi_revision'创建的。
  Ghostscript.NET.GhostscriptLibrary.Initialize()+ 865
  Ghostscript.NET.GhostscriptLibrary..ctor(GhostscriptVersionInfo   version,Boolean fromMemory)+178
  Ghostscript.NET.Interpreter.GhostscriptInterpreter..ctor(GhostscriptVersionInfo   version,Boolean fromMemory)+48
  Ghostscript.NET.Viewer.GhostscriptViewer.Open(String path,   GhostscriptVersionInfo versionInfo,Boolean dllFromMemory)+75
  Ghostscript.NET.Viewer.GhostscriptViewer.Open(Stream stream,   GhostscriptVersionInfo versionInfo,Boolean dllFromMemory)+59
  Ghostscript.NET.Rasterizer.GhostscriptRasterizer.Open(Stream stream,   GhostscriptVersionInfo versionInfo,Boolean dllFromMemory)+40
  VirtualWindow.Dropzone.Pages.Home.btnUpload_Click(Object sender,   EventArgs e)+270
  System.Web.UI.WebControls.Button.OnClick(EventArgs e)+116
  System.Web.UI.WebControls.Button.RaisePostBackEvent(字符串   eventArgument)+108
  System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(字符串   eventArgument)+12
  System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler   sourceControl,String eventArgument)+15
  System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)   +31 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,Boolean includeStagesAfterAsyncPoint)   3582

我的代码在

下面
protected void btnUpload_Click(object sender, EventArgs e)
{
    if (fileUpload.HasFile)
    {
        string ghostDllPath = HttpContext.Current.Server.MapPath("~/bin/External");
        GhostscriptRasterizer rasterizer = null;
        GhostscriptVersionInfo vesion = null;
        if (Environment.Is64BitProcess)
            vesion = new Ghostscript.NET.GhostscriptVersionInfo(new Version(0, 0, 0), ghostDllPath + @"\gsdll64.dll", string.Empty, Ghostscript.NET.GhostscriptLicense.GPL);
        else
            vesion = new Ghostscript.NET.GhostscriptVersionInfo(new Version(0, 0, 0), ghostDllPath + @"\gsdll32.dll", string.Empty, Ghostscript.NET.GhostscriptLicense.GPL);
        using (rasterizer = new Ghostscript.NET.Rasterizer.GhostscriptRasterizer())
        {
            rasterizer.Open(fileUpload.PostedFile.InputStream, vesion, false);
            if (rasterizer.PageCount > 0)
            {
                  int dpi = 90;
                  System.Drawing.Image img = rasterizer.GetPage(dpi, dpi, 1);
                  using (MemoryStream ms = new MemoryStream())
                  {
                       string file = Guid.NewGuid().ToString() + ".png";
                       img.Save(ms, ImageFormat.Png);
                       Response.ContentType = "image/png";
                       byte[] data = ms.ToArray();
                       Response.OutputStream.Write(data, 0, data.Length);
                       Response.AddHeader("Content-Disposition", "attachment;filename=" + file);
                       Response.Flush();
                   }
            }
            rasterizer.Close();
        }   
    }
}

我做错了什么?

1 个答案:

答案 0 :(得分:3)

好的发现了这个问题。包括路径在内的所有内容都已正确设置。我的网站托管在免费计划上,因此它被配置为32位环境。 我的本地环境是64位工作。所以我重新加载了gsdll32.dll。更新了azure,它也开始在azure上工作了。

问题是错误的gsdll32.dll