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?
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
。