/// <summary>
/// Resolves the supplied <paramref name="typeName"/> to a
/// <see cref="System.Type"/>
/// instance.
/// </summary>
/// <param name="typeName">
/// The (possibly partially assembly qualified) name of a
/// <see cref="System.Type"/>.
/// </param>
/// <returns>
/// A resolved <see cref="System.Type"/> instance.
/// </returns>
/// <exception cref="System.TypeLoadException">
/// If the supplied <paramref name="typeName"/> could not be resolved
/// to a <see cref="System.Type"/>.
/// </exception>
private Type ResolveType(string typeName)
{
Guard.ArgumentNotNullOrEmpty("typeName", typeName);
TypeAssemblyInfo typeInfo = new TypeAssemblyInfo(typeName);
Type type = null;
try
{
type = (typeInfo.IsAssemblyQualified) ?
LoadTypeDirectlyFromAssembly(typeInfo) :
LoadTypeByIteratingOverAllLoadedAssemblies(typeInfo);
}
catch (Exception ex)
{
ThrowHelper.ThrowTypeLoadExcetpion(ex, "类型加载失败", typeName);
}
if (type == null)
{
ThrowHelper.ThrowTypeLoadExcetpion("类型加载失败", typeName);
}
return(type);
}
/// <summary>
/// Uses <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/>
/// to load an <see cref="System.Reflection.Assembly"/> and then the attendant
/// <see cref="System.Type"/> referred to by the <paramref name="typeInfo"/>
/// parameter.
/// </summary>
/// <remarks>
/// <p>
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> is
/// deprecated in .NET 2.0, but is still used here (even when this class is
/// compiled for .NET 2.0);
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> will
/// still resolve (non-.NET Framework) local assemblies when given only the
/// display name of an assembly (the behaviour for .NET Framework assemblies
/// and strongly named assemblies is documented in the docs for the
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> method).
/// </p>
/// </remarks>
/// <param name="typeInfo">
/// The assembly and type to be loaded.
/// </param>
/// <returns>
/// A <see cref="System.Type"/>, or <see lang="null"/>.
/// </returns>
/// <exception cref="System.Exception">
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/>
/// </exception>
private static Type LoadTypeDirectlyFromAssembly(TypeAssemblyInfo typeInfo)
{
Type type = null;
// assembly qualified... load the assembly, then the Type
Assembly assembly = Assembly.Load(typeInfo.AssemblyName);
if (assembly != null)
{
type = assembly.GetType(typeInfo.TypeName, true, true);
}
return(type);
}
/// <summary>
/// Check all assembly
/// to load the attendant <see cref="System.Type"/> referred to by
/// the <paramref name="typeInfo"/> parameter.
/// </summary>
/// <param name="typeInfo">
/// The type to be loaded.
/// </param>
/// <returns>
/// A <see cref="System.Type"/>, or <see lang="null"/>.
/// </returns>
private static Type LoadTypeByIteratingOverAllLoadedAssemblies(TypeAssemblyInfo typeInfo)
{
Type type = null;
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (Assembly assembly in assemblies)
{
type = assembly.GetType(typeInfo.TypeName, false, false);
if (type != null)
{
break;
}
}
return(type);
}
/// <summary>
/// Check all assembly
/// to load the attendant <see cref="System.Type"/> referred to by
/// the <paramref name="typeInfo"/> parameter.
/// </summary>
/// <param name="typeInfo">
/// The type to be loaded.
/// </param>
/// <returns>
/// A <see cref="System.Type"/>, or <see lang="null"/>.
/// </returns>
private static Type LoadTypeByIteratingOverAllLoadedAssemblies(TypeAssemblyInfo typeInfo)
{
Type type = null;
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (Assembly assembly in assemblies)
{
type = assembly.GetType(typeInfo.TypeName, false, false);
if (type != null)
{
break;
}
}
return type;
}
/// <summary>
/// Uses <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/>
/// to load an <see cref="System.Reflection.Assembly"/> and then the attendant
/// <see cref="System.Type"/> referred to by the <paramref name="typeInfo"/>
/// parameter.
/// </summary>
/// <remarks>
/// <p>
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> is
/// deprecated in .NET 2.0, but is still used here (even when this class is
/// compiled for .NET 2.0);
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> will
/// still resolve (non-.NET Framework) local assemblies when given only the
/// display name of an assembly (the behaviour for .NET Framework assemblies
/// and strongly named assemblies is documented in the docs for the
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/> method).
/// </p>
/// </remarks>
/// <param name="typeInfo">
/// The assembly and type to be loaded.
/// </param>
/// <returns>
/// A <see cref="System.Type"/>, or <see lang="null"/>.
/// </returns>
/// <exception cref="System.Exception">
/// <see cref="System.Reflection.Assembly.LoadWithPartialName(string)"/>
/// </exception>
private static Type LoadTypeDirectlyFromAssembly(TypeAssemblyInfo typeInfo)
{
Type type = null;
// assembly qualified... load the assembly, then the Type
Assembly assembly = Assembly.Load(typeInfo.AssemblyName);
if (assembly != null)
{
type = assembly.GetType(typeInfo.TypeName, true, true);
}
return type;
}
/// <summary>
/// Resolves the supplied <paramref name="typeName"/> to a
/// <see cref="System.Type"/>
/// instance.
/// </summary>
/// <param name="typeName">
/// The (possibly partially assembly qualified) name of a
/// <see cref="System.Type"/>.
/// </param>
/// <returns>
/// A resolved <see cref="System.Type"/> instance.
/// </returns>
/// <exception cref="System.TypeLoadException">
/// If the supplied <paramref name="typeName"/> could not be resolved
/// to a <see cref="System.Type"/>.
/// </exception>
private Type ResolveType(string typeName)
{
Guard.ArgumentNotNullOrEmpty("typeName", typeName);
TypeAssemblyInfo typeInfo = new TypeAssemblyInfo(typeName);
Type type = null;
try
{
type = (typeInfo.IsAssemblyQualified) ?
LoadTypeDirectlyFromAssembly(typeInfo) :
LoadTypeByIteratingOverAllLoadedAssemblies(typeInfo);
}
catch (Exception ex)
{
ThrowHelper.ThrowTypeLoadExcetpion(ex, "类型加载失败", typeName);
}
if (type == null)
{
ThrowHelper.ThrowTypeLoadExcetpion("类型加载失败", typeName);
}
return type;
}
