I am trying to convert pdf first page to image using Ghostscript.NET it works fine on local IIS but fails on the Azure web app with the following error:
[GhostscriptException: Delegate of an exported function couldn't be created for symbol 'gsapi_revision']
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(String eventArgument) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String 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
My code is below
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();
}
}
}
What I am doing wrong?
