使用func<t,treult>delegate

我有以下创建csv的方法。

var csv =  new CsvResult<MatrixCampaignLine>(matrixCampaignLines, fileName, CsvHelper.GetMatrixHeader(), x => x.RegionName,
                             x => x.CustomerSku.ToString(),
                             x => x.ProductName.ToString(),
                             x => x.Quantity.ToString()
 );

快乐的日子,直到我需要在最后一个属性调用中嵌套一个foreach。我需要通过matrixcampaignlines.products迭代。想象一下,在x之后,我加了这样的东西。

x => x.Quantity.ToString(),
 foreach(var products in x => x.ProductQuantites)
        {
           x.Quantity,
         }

下面是调用的方法。

public CsvResult(IEnumerable<T> data, string fileName, List<string> headers, params Func<T, string>[] columns)
{
    Data = data;
    Columns = columns;
    FileName = fileName;
    Headers = headers;
}   

编辑:

  public IEnumerable<T> Data { get; private set; }
    public Func<T, string>[] Columns { get; private set; }
    public Func<T, string[]>[] Cols { get; private set; }
    public string FileName { get; private set; }
    public List<string> Headers { get; private set; }



    public CsvResult(IEnumerable<T> data, string fileName, List<string> headers, string userName, params Func<T, string[]>[] columns)
    {
        Data = data;
        Cols = columns;
        FileName = fileName;
        Headers = headers;
    }