比较IEnumerable 的类型(Compare type of IEnumerable)

 我有字典，根据传入的值返回一个方法。定义如下： 
 
Dictionary<Type, IXmlWriterConverter>
 
 我现在添加了一个新的函数，其Key / type设置为IEnumerable，到目前为止一直很好。 但是当我使用包含两个DataTables的List执行单元测试但字典找不到密钥时，例如我的类型转换不同。 
 
 为什么？ 什么是解决我的问题的正确尝试？ 
 
 编辑：对不起，这是请求的代码;-) 
 
 生成测试值的函数： 
 
public IEnumerable<DataTable> CreateTestDataTableList()
{
    var resultDataTable = new List<DataTable>();

    resultDataTable.Add(CreateTestTable("testTable1", 2));
    resultDataTable.Add(CreateTestTable("testTable2", 3));

    return resultDataTable;
}
 
 单元测试调用的函数： 
 
public void Write(XmlWriter xmlWriter, object value)
{
    ...
    converter = FindConverter(value.GetType());
}
 
 检查字典的功能： 
 
public IXmlWriterConverter FindConverter(Type type)
{
    if(Converters.ContainsKey(type))
    {
        return Converters[type];
    }
    return null;
}
 
 2.Edit： 
 
 将值添加到Dictionary的代码： 
 
public void Add(IXmlWriterConverter xmlWriterConverter)
{
    if(Converters.ContainsKey(xmlWriterConverter.InputType))
    {
        Remove(xmlWriterConverter);
    }

    Converters.Add(xmlWriterConverter.InputType, xmlWriterConverter);
}
 
 InputType是转换器的只读（get）属性。 我检查了添加到字典中的类型，并注册为IEnumerable，但是当我在列表中传递时检查typeof时，类型是List而不是IEnumerable。 我被告知发生这种情况是因为我将值作为对象传递。 

I have dictionary that gives me back a method according to the value passed in. Defined as so:
 
Dictionary<Type, IXmlWriterConverter>
 
I have now added a new function that which has the Key/type set to IEnumerable, so far so good. But when I execute my unit test with a List containing two DataTables but the dictionary can not find the key e.g. my type conversion differs.
 
Why is that so? And what would be the right attempt to solve my problem?
 
Edit: Sorry here is the requested code ;-)
 
Function that generates the testvalues:
 
public IEnumerable<DataTable> CreateTestDataTableList()
{
    var resultDataTable = new List<DataTable>();

    resultDataTable.Add(CreateTestTable("testTable1", 2));
    resultDataTable.Add(CreateTestTable("testTable2", 3));

    return resultDataTable;
}
 
Function called by the unit test:
 
public void Write(XmlWriter xmlWriter, object value)
{
    ...
    converter = FindConverter(value.GetType());
}
 
Function checking the dictionary:
 
public IXmlWriterConverter FindConverter(Type type)
{
    if(Converters.ContainsKey(type))
    {
        return Converters[type];
    }
    return null;
}
 
2.Edit:
 
Code that adds the values to the Dictionary:
 
public void Add(IXmlWriterConverter xmlWriterConverter)
{
    if(Converters.ContainsKey(xmlWriterConverter.InputType))
    {
        Remove(xmlWriterConverter);
    }

    Converters.Add(xmlWriterConverter.InputType, xmlWriterConverter);
}
 
The InputType is a readonly (get) property of the converter. I checked the type added to the dictionary and that was registered as IEnumerable, however when I checked on the typeof when passing in my list the type was List and not IEnumerable. I was told that this happens because I pass in the values as object.

原文：https://stackoverflow.com/questions/3708917