Initial commit

PartSource.Entities/SqlServerTypes/Loader.cs

@@ -0,0 +1,45 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace SqlServerTypes
+{
+    /// <summary>
+    /// Utility methods related to CLR Types for SQL Server 
+    /// </summary>
+    public class Utilities
+    {
+        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        private static extern IntPtr LoadLibrary(string libname);
+
+        /// <summary>
+        /// Loads the required native assemblies for the current architecture (x86 or x64)
+        /// </summary>
+        /// <param name="rootApplicationPath">
+        /// Root path of the current application. Use Server.MapPath(".") for ASP.NET applications
+        /// and AppDomain.CurrentDomain.BaseDirectory for desktop applications.
+        /// </param>
+        public static void LoadNativeAssemblies(string rootApplicationPath)
+        {
+            var nativeBinaryPath = IntPtr.Size > 4
+                ? Path.Combine(rootApplicationPath, @"SqlServerTypes\x64\")
+                : Path.Combine(rootApplicationPath, @"SqlServerTypes\x86\");
+
+            LoadNativeAssembly(nativeBinaryPath, "msvcr120.dll");
+            LoadNativeAssembly(nativeBinaryPath, "SqlServerSpatial140.dll");
+        }
+
+        private static void LoadNativeAssembly(string nativeBinaryPath, string assemblyName)
+        {
+            var path = Path.Combine(nativeBinaryPath, assemblyName);
+            var ptr = LoadLibrary(path);
+            if (ptr == IntPtr.Zero)
+            {
+                throw new Exception(string.Format(
+                    "Error loading {0} (ErrorCode: {1})",
+                    assemblyName,
+                    Marshal.GetLastWin32Error()));
+            }
+        }
+    }
+}