编译器错误消息：CS1502

Question

对于以下linq查询，我添加了

w = document.tblTransmittalls.Select(dx => dx.tblFiles)

字段以及下面的函数我添加了“theDocument.w”参数，但我有错误，它显示了我：

IEnumerable<System.Data.Linq.EntitySet<tblFile>>

虽然我喜欢和其他论点一样：IEnumerable<tblFile> w 我不知道发生了什么。

  

编译器错误消息：CS1502

在将“theDocument.w”参数添加到我的函数之前，我没有错误。

private void DisplayDocument()
{
    var documents =
      from document in _DataContext.tblDocuments
      where document.DocId == _DocID
      select new
      {
          DocId = document.DocId,
          Title = document.TITLE,
          DocNo = document.DocumentNo,
          Originator = document.Originator,
          Type = document.Document_Type,
          Unit = document.Unit,
          MaterialCode = document.EQ_IN_Identify_Material_Code,
          Transmittals = document.tblTransmittalls.Select(dt => dt.tbltransmittalNo),
          x = document.tblTransmittalls.Select(dp => dp.tblDocTranstoCons.tblTranstoCon),
          //Authors = book.BookAuthors.Select(bookAuthor => bookAuthor.AuthorObject),
          y = document.tblTransmittalls,
          z = document.tblTransmittalls.Select(dp => dp.tblDocTranstoCons),
          w = document.tblTransmittalls.Select(dx => dx.tblFiles)
      }

DisplayTransmittals(theDocument.Transmittals, theDocument.x, theDocument.DocId, theDocument.y, theDocument.z, theDocument.w);


private void DisplayTransmittals(IEnumerable<tbltransmittalNo> transmittals, IEnumerable<tblTranstoCon> x, int d,
    IEnumerable<tblTransmittall> y, IEnumerable<tblDocTranstoCon> z, IEnumerable<tblFile> w)
{
    Transmittallistfortest transmittalList = (Transmittallistfortest)DetailsView1.FindControl("Transmittallistfortest1");
    GridView g3 = transmittalList.FindControl("GridViewTtransmittals") as GridView;
    transmittalList.Transmittals = transmittals;
    transmittalList.Doc = d;
    transmittalList.Transmittaltocons = x;
    transmittalList.DocTranstoCons = z;
    transmittalList.tblTransmittall = y;
    transmittalList.Efiles = w;
    transmittalList.DataBind();

}

Answer 1

在Google上搜索错误代码会返回this page，表示这是The best overloaded method match for 'declaration' has some invalid arguments错误的代码。

基于此以及添加导致错误的theDocument.w的结果，听起来theDocument.w不属于IEnumerable<tblFile>类型。