未知的CS1003错误 [英] Unknown CS1003 Error

问题描述

我无法为超过特定时间的实体框架中的代码优先迁移而编译我的项目。我正在从xml中读取值以填充表。我有以下代码：

I can't compile my project for code-first migrations in entity framework past a certain point. I am reading in values from xml to populate a table. I have the following code:

        //EnrolmentProgramStartDate

        var programQuery = from r in context.EnrolmentPrograms
                           select r;

        var programList = programQuery.ToList<Entities.MetaData.Enrolment.EnrolmentProgram>();

        resourceName = "LearnLogicElicos_WebApi.SeedData.MetaData.Enrolment.enrolment_program_start_date.xml";
        stream = assembly.GetManifestResourceStream(resourceName);
        xml = XDocument.Load(stream);
        List<Entities.MetaData.Enrolment.EnrolmentProgramStartDate> enrolmentStartdates = new List<Entities.MetaData.Enrolment.EnrolmentProgramStartDate>();

        foreach (var e in xml.Root.Elements("StartDate"))
        {
            DateTime.TryParse((string)e.Element("Start"), out var startDate);

            enrolmentStartdates.Add(new Entities.MetaData.Enrolment.EnrolmentProgramStartDate()
            {
                PrgmCode = (string)e.Element("ProgramCode"),
                StartDate = startDate
            });
        }

        var programStartdateWithFk = (from t1 in enrolmentStartdates
                                      join t2 in programList
                                      on t1.PrgmCode equals t2.PrgmCode
                                      select new Entities.MetaData.Enrolment.EnrolmentProgramStartDate
                                      {
                                          PrgmCode = t1.PrgmCode,
                                          StartDate = t1.StartDate,
                                          EnrolmentProgramFk = t2.PrgmPk
                                      });

        context.EnrolmentProgramStartDates.AddRange(programStartdateWithFk);

        context.SaveChanges();

我在输出窗口中收到以下错误： Configuration.cs（ 179,71,179,80）：错误CS1003：语法错误，，预期，但我在错误列表中未收到任何错误，而且我一生无法看到丢失的，。

I am getting the following error in the output window: Configuration.cs(179,71,179,80): error CS1003: Syntax error, ',' expected but I am not receiving any errors in the error list and I cannot for the life of me see a missing ,.

xml如下：

<?xml version="1.0" encoding="utf-8" ?>
<Starts>
  <StartDate>
    <ProgramCode>DEC25</ProgramCode>
    <Start>2018,1,2</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC15</ProgramCode>
    <Start>2018,3,19</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC10</ProgramCode>
    <Start>2018,4,30</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC5W</ProgramCode>
    <Start>2018,6,4</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC5R</ProgramCode>
    <Start>2018,6,4</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC5S</ProgramCode>
    <Start>2018,6,4</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>DEC5L</ProgramCode>
    <Start>2018,6,4</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,1,2</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,1,8</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,1,15</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,1,22</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,1,29</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>GE</ProgramCode>
    <Start>2018,2,5</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,1,2</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,1,8</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,1,15</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,1,22</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,1,29</Start>
  </StartDate>
  <StartDate>
    <ProgramCode>ITP</ProgramCode>
    <Start>2018,2,5</Start>
  </StartDate>
</Starts>

有人可以告诉我：a）逗号在哪里，或b）真正的是导致我得到此错误的问题是。

Could someone please tell me either: a) where the missing comma is, or b) what the real issue leading me to get this error is.

谢谢。

推荐答案

错误在此行上：

DateTime.TryParse((string)e.Element("Start"), out var startDate);

由于 var 关键词。您必须将其删除。目前尚不清楚为什么要在其中使用它，但是如果要声明该变量，请在上一行进行操作：

And you get it because of the var keyword. You must remove it. It's not clear why you have it there, but if you are trying to declare the variable, then do it on a previous line:

DateTime startDate;
DateTime.TryParse((string)e.Element("Start"), out startDate);

前面已经说过，如果您稍等片刻，C＃版本7实际上将支持此功能（尽管目前尚不清楚如果您可以使用 var 来代替显式类型）。在此处查看建议的功能： https://blogs.msdn.microsoft.com/dotnet/2016/08/24/whats-new-in-csharp-7-0/

Having said that, if you wait a while, C# version 7 will actually support this (though it's unclear if you can use var instead of an explicit type just yet). Take a look here for the proposed features: https://blogs.msdn.microsoft.com/dotnet/2016/08/24/whats-new-in-csharp-7-0/

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