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大家好，我有方法将一些参数传递给存储过程，当我执行它时，我得到了这个错误

[从具体化的“System.Int32”类型到“System.String”类型的指定转换无效。]

这就是我如何调用我的存储过程

  public JsonResult CreatedBugs()
    {
        int year;
        int month;
        int projectid;
        year = 2012;
        month = 8;
        projectid = 16;
        var loggedbugs = db.ExecuteStoreQuery<LoggedBugs>("LoggedBugs @Year,@Month,@ProjectID", new SqlParameter("@Year",year ), new SqlParameter("@Month",  month ), new SqlParameter("@ProjectID", projectid )).ToList();
        var ClosedBugs = db.ExecuteStoreQuery<LoggedBugs>("ClosedBugs @Year,@Month,@ProjectID", new SqlParameter("@Year", year), new SqlParameter("@Month", month), new SqlParameter("@ProjectID", projectid)).ToList();
        var model = new LoggedBugs
        {
            LoggedBugsCount = loggedbugs,
            ClosedBugs = ClosedBugs
        };
        return Json(model, JsonRequestBehavior.AllowGet);
    }

这是我的存储过程

      alter procedure LoggedBugs
      (
      @Year int,
      @Month int,
      @ProjectID int
      )
      as
      begin
       SELECT projectName,
    ProjectYear,
    ProjectMonth, 
      Week1, Week2, Week3, Week4, Week5
          FROM (
 Select  p.projectName,YEAR(b.CreatedDate) ProjectYear, MONTH(b.CreatedDate) ProjectMonth,
        'Week' + CAST(DATEDIFF(week, DATEADD(MONTH, DATEDIFF(MONTH, 0, b.CreatedDate), 0), b.CreatedDate)+1 AS VARCHAR) as [Weeks],
        b.BUGID
From    BUGS b inner join projects p on b.ProjectId = p.ProjectId
Where   DatePart(year, CreatedDate) = @Year and datepart(month, Createddate) = @Month and b.projectid = @ProjectID 
  ) p
   PIVOT (COUNT(BUGID) FOR [Weeks] IN (WEEK1, WEEK2, WEEK3, Week4, Week5)) AS pvt
 end

我在哪里做错了

编辑1

这是我的 LoggedBug 类

 public class LoggedBugs
{
    public string projectName { get; set; }
    public string ProjectYear { get; set; }
    public string ProjectMonth { get; set; }
    public string Week1 { get; set; }
    public string Week2 { get; set; }
    public string Week3 { get; set; }
    public string Week4 { get; set; }
    public string Week5 { get; set; }
    public IEnumerable<LoggedBugs> LoggedBugsCount { get; set; }
    public IEnumerable<LoggedBugs> ClosedBugs { get; set; }
}
4

2 回答 2

1

ProjectYear和可能有问题ProjectMonth。在数据库端它们是int，所以在 .NET 端它们可能会被拆箱为System.Int32. 在您的实体中，它们是string. 尝试将其转换为varchar您的 sp 或将实体中的类型更改为int.

于 2012-08-28T18:03:09.040 回答
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将 ProjectYear 和 ProjectMonth 属性更改为在 LoggedBugs 类中键入 int。您的 sql 将它们作为 int 返回，请参阅YEAR SQL MSDN 描述，因为 YEAR 和 MONTH sql 函数都返回 int 类型的值。您的 C# 代码需要一个字符串，因此您会收到类型不匹配异常。

于 2012-09-03T21:15:28.260 回答