linq 查询结果转换成DataTable 方法

转换方法代码：

代码

  private  DataTable ConvertToTable(IQueryable query)
        {
            DataTable dtList  =   new  DataTable();
             bool  isAdd  =   false ;
            PropertyInfo[] objProterties  =   null ;
             foreach  (var item  in  query)
            {
                 if  ( ! isAdd)
                {
                    objProterties  =  item.GetType().GetProperties();
                     foreach  (var itemProterty  in  objProterties)
                    {
                        Type type  =   null ;
                         if  (itemProterty.PropertyType  !=   typeof ( string )  &&  itemProterty.PropertyType  !=   typeof ( int )  &&  itemProterty.PropertyType  !=   typeof (DateTime))
                        {
                            type  =   typeof ( string );
                        }
                         else
                        {
                            type  =  itemProterty.PropertyType;
                        }
                        dtList.Columns.Add(itemProterty.Name, type);
                    }
                    isAdd  =   true ;
                }
                var row  =  dtList.NewRow();
                 foreach  (var pi  in  objProterties)
                {
                    row[pi.Name]  =  pi.GetValue(item,  null );
                }
                dtList.Rows.Add(row);
            }

             return  dtList;
        }

调用方法：

// linq查询语句
var queryData  =
                            from dv  in  emcsDataContext.DailyVals
                            join vrb  in  emcsDataContext.Variables on dv.VariableID equals vrb.VariableID
                             where  dv.VariableID  ==  variableId  &&  dv.CollectTime  >=  selectDate  &&  dv.CollectTime  <  selectDate.AddDays( 1 )
                            orderby dv.CollectTime
                            select  new
                            {
                                dv.ID,
                                dv.VariableID,
                                dv.CollectTime,
                                dv.VariableValue,
                                vrb.UpLimite,
                                vrb.LowLimite,
                                statDate  =  dv.CollectTime.ToShortTimeString()
                            };
// 转换
ConvertToTable(queryData)