MetaDataReader(string moduleName)
{
CLRMetaHost mh = new CLRMetaHost();
CLRRuntimeInfo highestInstalledRuntime = null;
foreach (CLRRuntimeInfo runtime in mh.EnumerateInstalledRuntimes())
{
if (highestInstalledRuntime == null ||
string.Compare(highestInstalledRuntime.GetVersionString(), runtime.GetVersionString(), StringComparison.OrdinalIgnoreCase) < 0)
{
highestInstalledRuntime = runtime;
}
}
if (highestInstalledRuntime == null)
{
throw new ApplicationException("Could not enumerate .NET runtimes on the system.");
}
IMetaDataDispenser metaDataDispenser = highestInstalledRuntime.GetIMetaDataDispenser();
Guid IMetaDataImport2_Guid = Guid("7DAC8207-D3AE-4c75-9B67-92801A497D44");
object metaDataImportObj;
metaDataDispenser.OpenScope(moduleName, 0, ref IMetaDataImport2_Guid, out metaDataImportObj);
m_metaDataImport = metaDataImportObj as IMetadataImport2;
}
/// <summary>
/// Given the full path to a binary, finds the CLR runtime version which
/// it will bind to.
/// </summary>
/// <param name="filePath">The full path to a binary.</param>
/// <returns>The version string that the binary will bind to; null if unknown.</returns>
/// <remarks>If ICLRMetaHostPolicy can be asked, it is used. Otherwise
/// fall back to mscoree!GetRequestedRuntimeVersion.</remarks>
public static String GetDefaultRuntimeForFile(String filePath)
{
String version = null;
CLRMetaHostPolicy policy;
try
{
policy = new CLRMetaHostPolicy();
}
catch (NotImplementedException)
{
policy = null;
}
catch (System.EntryPointNotFoundException)
{
policy = null;
}
if (policy != null)
{
// v4 codepath
StringBuilder ver = new StringBuilder();
StringBuilder imageVer = new StringBuilder();
CLRRuntimeInfo rti = null;
String configPath = null;
if (System.IO.File.Exists(filePath + ".config"))
{
configPath = filePath + ".config";
}
try
{
rti = policy.GetRequestedRuntime(CLRMetaHostPolicy.MetaHostPolicyFlags.metaHostPolicyHighCompat,
filePath,
configPath,
ref ver,
ref imageVer);
}
catch (System.Runtime.InteropServices.COMException)
{
Debug.Assert(rti == null);
}
if (rti != null)
{
version = rti.GetVersionString();
}
else
{
version = null;
}
}
else
{
// v2 codepath
try
{
version = CorDebugger.GetDebuggerVersionFromFile(filePath);
}
catch (System.Runtime.InteropServices.COMException)
{
// we could not retrieve dee version.
// Leave version null;
Debug.Assert(version == null);
}
}
return(version);
}
