/// <summary>读取镜像信息</summary>
/// <param name="file"></param>
/// <returns></returns>
public static PEImage Read(String file)
{
if (String.IsNullOrEmpty(file))
{
return(null);
}
if (!File.Exists(file))
{
return(null);
}
try
{
using (var fs = new FileStream(file, FileMode.Open, FileAccess.Read))
{
return(PEImage.Read(fs));
}
}
catch (Exception ex)
{
if (XTrace.Debug)
{
XTrace.WriteLine("PEImage.Read({0})出错 {1}", file, ex);
}
return(null);
}
}
/// <summary>只反射加载指定路径的所有程序集</summary>
/// <param name="file"></param>
/// <param name="ver"></param>
/// <returns></returns>
public static Assembly ReflectionOnlyLoadFrom(String file, Version ver = null)
{
// 仅加载.Net文件，并且小于等于当前版本
var pe = PEImage.Read(file);
if (pe == null || !pe.IsNet)
{
return(null);
}
if (ver == null)
{
ver = new Version(Assembly.GetExecutingAssembly().ImageRuntimeVersion.TrimStart('v'));
}
// 只判断主次版本，只要这两个相同，后面可以兼容
var pv = pe.Version;
if (pv.Major > ver.Major || pv.Major == ver.Major && pv.Minor > ver.Minor)
{
if (XTrace.Debug)
{
XTrace.WriteLine("程序集 {0} 的版本 {1} 大于当前运行时 {2}", file, pv, ver);
}
return(null);
}
// 必须加强过滤，下面一旦只读加载，就再也不能删除文件
if (!pe.ExecutableKind.Has(PortableExecutableKinds.ILOnly))
{
// 判断x86/x64兼容。无法区分x86/x64的SQLite驱动
//XTrace.WriteLine("{0,12} {1} {2}", item, pe.Machine, pe.ExecutableKind);
//var x64 = pe.ExecutableKind.Has(PortableExecutableKinds.Required32Bit);
//var x64 = pe.Machine == ImageFileMachine.AMD64;
var x64 = pe.Machine == ImageFileMachine.AMD64;
if (Runtime.Is64BitProcess ^ x64)
{
if (XTrace.Debug)
{
XTrace.WriteLine("程序集 {0} 的代码特性是 {1}，而当前进程是 {2} 进程", file, pe.Machine, Runtime.Is64BitProcess ? "64位" : "32位");
}
return(null);
}
}
try
{
return(Assembly.ReflectionOnlyLoadFrom(file));
}
catch { return(null); }
//return null;
}
