From 6969d256ce37efa818d0c58640eda21d16aa243c Mon Sep 17 00:00:00 2001
From: Michal Blaha <michal@michalblaha.cz>
Date: Sun, 30 Jul 2023 12:00:05 +0200
Subject: [PATCH] Update NativeMethods.cs

In Docker (ubuntu/Debian), when .net console app with PDFtoImage is call from another application, workingDirectory is not setup.

Assembly.GetExecutingAssembly().Location returns empty string, not null and new Uri(workingDirectory) than failes with exception "empty Uri"
---
 src/PDFtoImage/PdfiumViewer/NativeMethods.cs | 27 +++++++++++---------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/src/PDFtoImage/PdfiumViewer/NativeMethods.cs b/src/PDFtoImage/PdfiumViewer/NativeMethods.cs
index 04f2dc7e..bee78e68 100644
--- a/src/PDFtoImage/PdfiumViewer/NativeMethods.cs
+++ b/src/PDFtoImage/PdfiumViewer/NativeMethods.cs
@@ -12,20 +12,23 @@ static NativeMethods()
         {
             // Load the platform dependent Pdfium.dll if it exist.
 #if NET7_0_OR_GREATER
-            var workingDirectory =
-                Assembly.GetExecutingAssembly().Location
-                ?? Environment.ProcessPath!
-                ?? AppContext.BaseDirectory;
+            string workingDirectory = Assembly.GetExecutingAssembly().Location;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory = Environment.ProcessPath!;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory = AppContext.BaseDirectory;
 #elif NET6_0_OR_GREATER
-            var workingDirectory =
-                Assembly.GetExecutingAssembly().GetName(false).CodeBase
-                ?? Environment.ProcessPath!
-                ?? AppContext.BaseDirectory;
+            var workingDirectory = Assembly.GetExecutingAssembly().GetName(false).CodeBase;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory = Environment.ProcessPath!;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory = AppContext.BaseDirectory;
 #else
-            var workingDirectory =
-                Assembly.GetExecutingAssembly().GetName(false).CodeBase
-                ?? Process.GetCurrentProcess().MainModule!.FileName!
-                ?? AppContext.BaseDirectory;
+            var workingDirectory =Assembly.GetExecutingAssembly().GetName(false).CodeBase;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory =  Process.GetCurrentProcess().MainModule!.FileName!;
+            if (string.IsNullOrWhiteSpace(workingDirectory))
+                workingDirectory = AppContext.BaseDirectory;
 #endif
 
             LoadNativeLibrary(Path.GetDirectoryName(new Uri(workingDirectory).LocalPath)!);