Question

我正在尝试使用LINQ来比较用户在搜索栏中输入的内容与表格的对比。

 public ActionResult GetLibrary(string searchString, string lib)
    {
        var libraries = Database.Session.Query<Library>().ToArray();

        string searchedLib = (from l in libraries
                              where l.CR_Name.Contains(searchString)
                              select new Library()
                              {
                                  CR_Name = l.CR_Name
                              }).ToString();

        lib = searchedLib;

        return RedirectToAction(actionName: "GetLibInfo",
            controllerName: "Home",
            routeValues: new { lib });
    }

而不是返回实际值，而是返回此信息： “System.Linq.Enumerable + WhereSelectArrayIterator'2 [Models.ModelName，Models.ModelName]”

Answer 1

WhereSelectArrayIterator是表示一组结果的IEnumerable。如果你只想要/期望一个＆＃34;行，＆＃34;使用Single()或First()。

var searchedLib = (from l in libraries
                      where l.CR_Name.Contains(searchString)
                      select l).First();

var name = searchedLib.CR_Name;

最简单的方法：

var name = libraries.First(l => l.CR_Name.Contains(searchString)).CR_Name

LINQ查询不返回实际值

1 个答案: