动态Linq Groupby SELECT键，列表<T>

Question

我正在使用Dynamic Linq助手来分组数据。我的代码如下：

Employee[] empList = new Employee[6]; 
empList[0] = new Employee() { Name = "CA", State = "A", Department = "xyz" }; 
empList[1] = new Employee() { Name = "ZP", State = "B", Department = "xyz" }; 
empList[2] = new Employee() { Name = "AC", State = "B", Department = "xyz" }; 
empList[3] = new Employee() { Name = "AA", State = "A", Department = "xyz" }; 
empList[4] = new Employee() { Name = "A2", State = "A", Department = "pqr" }; 
empList[5] = new Employee() { Name = "BA", State = "B", Department = "pqr" }; 

var empqueryable = empList.AsQueryable(); 
var dynamiclinqquery = DynamicQueryable.GroupBy(empqueryable, "new (State, Department)", "it"); 

我怎样才能找回分组的项目中的重点和相应的清单即{重点，列出}的IEnumerable的从dynamiclinqquery？

Answer 1

我定义的问题解决了一个选择器，用于投影Key以及Employees List。

 var eq = empqueryable.GroupBy("new (State, Department)", "it").Select("new(it.Key as Key, it as Employees)"); 
     var keyEmplist = (from dynamic dat in eq select dat).ToList(); 

     foreach (var group in keyEmplist) 
     { 
      var key = group.Key; 
      var elist = group.Employees; 

      foreach (var emp in elist) 
      { 

      }           
     } 

Answer 2

该GroupBy方法仍应返回实现IEnumerable<IGrouping<TKey, TElement>>的东西。

虽然你可能无法真正投它（我假设它是dynamic），你当然可以仍就调用它，就像这样：

foreach (var group in dynamiclinqquery) 
{ 
    // Print out the key. 
    Console.WriteLine("Key: {0}", group.Key); 

    // Write the items. 
    foreach (var item in group) 
    { 
     Console.WriteLine("Item: {0}", item); 
    } 
}