using System;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace SqlServerTypes
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{
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/// <summary>
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/// Utility methods related to CLR Types for SQL Server
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/// </summary>
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internal class Utilities
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{
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[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
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private static extern IntPtr LoadLibrary(string libname);
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/// <summary>
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/// Loads the required native assemblies for the current architecture (x86 or x64)
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/// </summary>
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/// <param name="rootApplicationPath">
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/// Root path of the current application. Use Server.MapPath(".") for ASP.NET applications
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/// and AppDomain.CurrentDomain.BaseDirectory for desktop applications.
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/// </param>
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public static void LoadNativeAssemblies(string rootApplicationPath)
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{
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var nativeBinaryPath = IntPtr.Size > 4
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? Path.Combine(rootApplicationPath, @"SqlServerTypes\x64\")
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: Path.Combine(rootApplicationPath, @"SqlServerTypes\x86\");
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LoadNativeAssembly(nativeBinaryPath, "msvcr100.dll");
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LoadNativeAssembly(nativeBinaryPath, "SqlServerSpatial110.dll");
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}
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private static void LoadNativeAssembly(string nativeBinaryPath, string assemblyName)
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{
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var path = Path.Combine(nativeBinaryPath, assemblyName);
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var ptr = LoadLibrary(path);
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if (ptr == IntPtr.Zero)
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{
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throw new Exception(string.Format(
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"Error loading {0} (ErrorCode: {1})",
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assemblyName,
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Marshal.GetLastWin32Error()));
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}
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}
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}
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}
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