Question

这是我得到的错误。这是一种搜索方法。

错误CS1929＆＃39; SiteLocation＆＃39;不包含的定义＆＃39;包含＆＃39;和最好的扩展方法重载＆＃39; Queryable.Contains（IQueryable，string）＆＃39;需要一个接收器类型＆＃39; IQueryable＆＃39;

public ActionResult Index(string projectname)
    {
        var projects = db.Projects.Include(p => p.Engineer).Include(p => 
p.SiteLocation);

        var a = from p in db.Projects.Include(p => p.Engineer).Include(p => 
p.SiteLocation)
                select p;
        if (!String.IsNullOrEmpty(projectname))
        {
            //NumberMCP = c.NumberMCP,
            //Engineer = c.Engineer,
            //Plink = c.Plink,
            a = a.Where(c => c.SiteLocation.Contains(projectname));
            a = a.Where(c => c.NumberMCP.Contains(projectname));
            a = a.Where(c => c.nameProject.Contains(projectname));
            //Ptype = c.Ptype,
              //       Pyear = c.Pyear,
                //     SiteLocationID = c.SiteLocationID
                 }


        return View(a.ToList());

    }

我认为我的问题可能是这样的：iqueryable将int转换为字符串

Answer 1

问题：调用INT而不是String

解决： 如果需要，转换类型ToString

  a = a.Where(c => c.NumberMCP.Contains(projectname)
                     || c.nameProject.Contains(projectname)
                    || c.Engineer.ToString().Contains(projectname)
                    || c.Plink.Contains(projectname)
                    || c.Pyear.ToString().Contains(projectname)
                    || c.SiteLocation.ToString().Contains(projectname)
                    || c.Ptype.Contains(projectname)

扩展方法重载Queryable.contains

1 个答案: