我正在尝试创建一个显式的接口声明索引属性。例如:
public interface IFoo
{
int this[int i]
}
public abstract class Foo : IFoo
{
int IFoo.this[int i]
}
我编写了以下代码来执行此操作(这适用于普通索引属性,但不适用于显式接口声明索引属性):
var iface = typeof(IFoo);
var method = iface.GetMethod("Item"); // get the indexer
CodeMemberProperty memberIndexer = new CodeMemberProperty();
memberIndexer.Name = iface.Name + ".Item";
memberIndexer.Type = new CodeTypeReference(method.ReturnType.Name);
memberIndexer.HasSet = true;
memberIndexer.HasGet = true;
foreach (var param in method.GetParameters())
{
memberIndexer.Parameters.Add(
new CodeParameterDeclarationExpression(
new CodeTypeReference(param.ParameterType), param.Name));
}
// Explicit interface declaration cannot have any modifiers
memberIndexer.Attributes = ~MemberAttributes.Private;
// add to both set/get to NotImplementedException
var exceptionStatement = new CodeThrowExceptionStatement(
new CodeObjectCreateExpression(
new CodeTypeReference(typeof(System.NotImplementedException)),
new CodeExpression[] { }));
memberIndexer.GetStatements.Add(exceptionStatement);
memberIndexer.SetStatements.Add(exceptionStatement);
TargetClass.Members.Add(memberIndexer);
但是,这会生成以下代码:
int IFoo.Item
{
get
{
throw new System.NotImplementedException();
}
set
{
throw new System.NotImplementedException();
}
}
有关如何正确执行此操作的任何想法?
答案 0 :(得分:1)
您不应该通过更改Name
来执行此操作。相反,您应该使用完全用于此目的的属性:PrivateImplementationType
:
memberIndexer.PrivateImplementationType = new CodeTypeReference(iface);