创建c# System.Type子类的最简单方法

本文关键字：最简单方法子类 Type System 创建 | 更新日期: 2023-09-27 18:02:02

我需要从System.Type继承一个定点数字类

class FixedPoint : Type
{
    public bool Signed { get; set; }
    public int Width { get; set; }
    public int IntegerWidth { get; set; }
    public FixedPoint(Boolean signed = false, int width = 16, int integerWidth = 8)
    {
        Signed = signed;
        Width = width;
        IntegerWidth = integerWidth;
    }
}

当我试图编译这段代码时，我得到的错误消息说，我需要实现的方法类型是抽象类。

userdef.cs(3,7): error CS0534: 'FixedPoint' does not implement inherited abstract member 'System.Type.GUID.get'
userdef.cs(3,7): error CS0534: 'FixedPoint' does not implement inherited abstract member 'System.Type.Namespace.get'
c:'Windows'Microsoft.NET'Framework'v4.0.30319'mscorlib.dll: (Location of symbol related to previous error)
userdef.cs(3,7): error CS0534: 'FixedPoint' does not implement inherited abstract member
        'System.Type.AssemblyQualifiedName.get'

如何避免这些错误信息?有什么简单的方法子类类型?我必须实现所有的方法吗?如果有，有什么参考资料吗?

或

子类化Type的工作值得尝试吗?由于某些原因，我确实需要子类化Type，如果这真的很难做到的话。我最好早点放弃，另找办法。

创建c# System.Type子类的最简单方法

你说你有你从System.Type继承的理由，尽管我同意@mootinator，这里是你其他问题的一些答案:

是否有任何简单的方法子类类型?

号

我必须实现所有的方法吗?

是的。

如果有，有什么参考资料吗?

将override -关键字分别添加到Properties和Methods

这是一个如何开始的例子，你需要override每个abstract属性和方法。

public class Test : Type
{
    public override Guid GUID
    {
        get { throw new NotImplementedException(); }
    }
}

这是一个完整的可编译的class，覆盖了所有需要的properties和methods，但没有实现。

public class Test : Type
{
    public override Guid GUID
    {
        get { throw new NotImplementedException(); }
    }
    public override bool IsDefined(Type attributeType, bool inherit)
    {
        throw new NotImplementedException();
    }
    public override object[] GetCustomAttributes(bool inherit)
    {
        throw new NotImplementedException();
    }
    public override string Name
    {
        get { throw new NotImplementedException(); }
    }
    protected override bool HasElementTypeImpl()
    {
        throw new NotImplementedException();
    }
    public override object[] 
           GetCustomAttributes(Type attributeType, bool inherit)
    {
        throw new NotImplementedException();
    }
    public override Type UnderlyingSystemType
    {
        get { throw new NotImplementedException(); }
    }
    public override Type GetElementType()
    {
        throw new NotImplementedException();
    }
    protected override bool IsCOMObjectImpl()
    {
        throw new NotImplementedException();
    }
    protected override bool IsPrimitiveImpl()
    {
        throw new NotImplementedException();
    }
    protected override bool IsPointerImpl()
    {
        throw new NotImplementedException();
    }
    protected override bool IsByRefImpl()
    {
        throw new NotImplementedException();
    }
    protected override bool IsArrayImpl()
    {
        throw new NotImplementedException();
    }
    protected override System.Reflection.TypeAttributes 
                       GetAttributeFlagsImpl()
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.MemberInfo[] 
           GetMember(string name, System.Reflection.BindingFlags bindingAttr)
    {
        return base.GetMember(name, bindingAttr);
    }
    public override Type 
           GetNestedType(string name, System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.PropertyInfo[] 
           GetProperties(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    protected override System.Reflection.PropertyInfo 
              GetPropertyImpl(string name, System.Reflection.BindingFlags bindingAttr, 
                              System.Reflection.Binder binder, Type returnType, Type[] types, 
                              System.Reflection.ParameterModifier[] modifiers)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.MemberInfo[] 
           GetMembers(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override Type[] GetNestedTypes(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.EventInfo[] GetEvents()
    {
        return base.GetEvents();
    }
    public override Type[] GetInterfaces()
    {
        throw new NotImplementedException();
    }
    public override Type GetInterface(string name, bool ignoreCase)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.EventInfo[] 
           GetEvents(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.FieldInfo[] 
           GetFields(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.EventInfo 
           GetEvent(string name, System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.FieldInfo 
           GetField(string name, System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.MethodInfo[] 
           GetMethods(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    protected override System.Reflection.MethodInfo 
              GetMethodImpl(string name, System.Reflection.BindingFlags bindingAttr,
                            System.Reflection.Binder binder, System.Reflection.CallingConventions callConvention, 
                            Type[] types, System.Reflection.ParameterModifier[] modifiers)
    {
        throw new NotImplementedException();
    }
    public override System.Reflection.ConstructorInfo[] GetConstructors(System.Reflection.BindingFlags bindingAttr)
    {
        throw new NotImplementedException();
    }
    protected override System.Reflection.ConstructorInfo 
              GetConstructorImpl(System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder,
                                 System.Reflection.CallingConventions callConvention, Type[] types, 
                                 System.Reflection.ParameterModifier[] modifiers)
    {
        throw new NotImplementedException();
    }
    public override Type BaseType
    {
        get { throw new NotImplementedException(); }
    }
    public override string AssemblyQualifiedName
    {
        get { throw new NotImplementedException(); }
    }
    public override string Namespace
    {
        get { throw new NotImplementedException(); }
    }
    public override string FullName
    {
        get { throw new NotImplementedException(); }
    }
    public override System.Reflection.Assembly Assembly
    {
        get { throw new NotImplementedException(); }
    }
    public override System.Reflection.Module Module
    {
        get { throw new NotImplementedException(); }
    }
    public override object 
           InvokeMember(string name, System.Reflection.BindingFlags invokeAttr, 
                        System.Reflection.Binder binder, object target, object[] args, 
                        System.Reflection.ParameterModifier[] modifiers, 
                        System.Globalization.CultureInfo culture, string[] namedParameters)
    {
        throw new NotImplementedException();
    }
}

这些是你需要实现的属性

GUID
BaseType
AssemblyQualifiedName
FullName
装配/gh><
模块/gh>
UnderlyingSystemType
名称/gh>

这些是你需要实现的方法

InvokeMember
GetConstructorImpl
GetConstructors
GetMethodImpl
GetMethods
GetField
GetEvent
GetFields
GetEvents
GetInterface
getinterface
GetEvents
GetNestedTypes
GetMembers
GetPropertyImpl
getproperty
GetNestedType
GetMember
GetAttributeFlagsImpl
IsArrayImpl
IsByRefImpl
IsPointerImpl
IsPrimitiveImpl
IsCOMObjectImpl
GetElementType
GetCustomAttributes
HasElementTypeImpl
GetCustomAttributes
IsDefined

正如你所看到的，有相当多的你需要重写，以消除所有的编译错误，所以你有一个很好的理由想要这样做，或者你应该考虑从另一个类/结构重写，或者只是创建一个新的类/结构。

如果你想要做的是创建一个新的值类型，只需使用struct而不是class(不需要子类化Type)。

否则，你想通过子类化Type来完成typeof(TypeName)做不到的事情吗?