LINQ查询与变量在哪里条款

Question

我一直在这个几个小时，倾吐了多个类似的问题。我该如何做这个代码才能工作？

public void DoSomething(List<TheObj> objs, string lnameStr) 
    { 
     var pQuery = (from o in objs 
         where o.Lname.Contains(lnameStr) 
         select o).ToList(); 

     foreach (var theObj in pQuery) 
     { 
      Trace.WriteLine(theObj.Fname); 
     } 
    } 

感谢

Answer 1

public void DoSomething(List<TheObj> objs, string lnameStr) 
    { 
     if(objs != null && !string.IsNullOrEmpty(lnameStr)) 
     { 
     var pQuery = (from o in objs 
         where !string.IsNullOrEmpty(p.Lname) && 
          o.Lname.Contains(lnameStr) 
         select o).ToList(); 

     foreach (var theObj in pQuery) 
     { 
      Trace.WriteLine(theObj.Fname); 
     } 
     } 
    }