我可以有一个通用的此[]属性？ [英] Can I have a generic this[] property?

问题描述

我有一个包含一组对象从DataElement所有派生的DICOM字典。
本字典有一个int作为重点，而DataElement财产。
我的DICOM字典包含此[]属性在那里我可以访问DataElement，像这样的：

I have a DICOM dictionary that contains a set of objects all deriving from DataElement. The dictionary has an int as a key, and the DataElement as property. My DICOM dictionary contains a this[] property where I can access the DataElement, like this:

public class DicomDictionary
{
  Dictionary<int, DataElement> myElements = new Dictionary<int, DataElement>();
  .
  .
  public DataElement this[int DataElementTag]
  {
    get
    {
      return myElements[int];
    }
  }
}

一个现在的问题是我有不同类型的DataElement全部来自DataElement派生，像DataElementSQ，DataElementOB等。我想现在要做的是以下作出书面形式在C＃中稍微容易一些：

A problem now is that I have different DataElement types all deriving from DataElement, like DataElementSQ, DataElementOB and so on. What I wanted to do now is the following to make writing in C# a little bit easier:

 public T this<T>[int DataElementTag] where T : DataElement
 {
   get
   {
      return myElements[int];
   }
 }

但是，这是不是真的有可能。是不是我错过了什么？当然，我可以用getter方法做到这一点，但它会好得多有这样的看法。

But this is not really possible. Is there something I have missed? Of course I could do it with Getter method, but it would be much nicer to have it this way.

推荐答案

它是一个？情况下，你

public class DicomDictionary<TElement> 
{
        Dictionary<int, TElement> myElements = new Dictionary<int, TElement>();
        public TElement this[int DataElementTag]   
        {     
              get     
              {       
                 return myElements[int];     
              }   
        } 
}

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