dynamics 365 Entites转成DataTable DataCollection＜Entity＞转成DataTable

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        //怎么把entity转化成datatable
        public static DataTable EntitiesToDatatable(this DataCollection<Entity> entities)
        {
            DataTable dataTable = new DataTable();

            if (entities.Count > 0)
            {

                foreach (var item in entities[0].Attributes)
                {

                    if (item.Value.ToString().Contains("EntityReference"))
                    {

                        dataTable.Columns.Add(item.Key.Replace("id", "name"), typeof(string));
                    }
                    dataTable.Columns.Add(item.Key, typeof(string));
                }

                foreach (Entity item in entities)
                {

                    DataRow dr = dataTable.NewRow();
                    foreach (var Attributes in item.Attributes)
                    {
                        if (Attributes.Value.ToString().Contains("EntityReference"))
                        {

                            dr[Attributes.Key.Replace("id", "name")] = item.EntityGetValue(Attributes.Key, true);//通过名称赋值

                        }

                        dr[Attributes.Key] = item.EntityGetValue(Attributes.Key);//通过名称赋值
                    }
                    dataTable.Rows.Add(dr);
                }



            }





            return dataTable;
        }
        public static string EntityGetValue(this Entity entity, string AttrName, bool ValueType = false)
        {

            string str = "";

            ICollection<string> keys = entity.Attributes.Keys;
            ICollection<object> Values = entity.Attributes.Values;

            int keysindex = 0;
            int Valuesindex = 0;

            foreach (string keysitem in keys)
            {
                keysindex++;
                if (keysitem == AttrName)
                {

                    foreach (object Valuesitem in Values)
                    {
                        Valuesindex++;
                        if (keysindex == Valuesindex)
                        {
                            Type type = Valuesitem.GetType();
                            if (type.ToString().ToLower().Contains("boolean"))
                            {

                                Boolean S = entity.GetAttributeValue<Boolean>(AttrName);

                                if (S)
                                {
                                    str = "是";
                                }
                                else
                                {
                                    str = "否";
                                }
                            }
                            else if (type.ToString().ToLower().Contains("entityreference"))
                            {
                                if (ValueType)
                                    str = entity.GetAttributeValue<EntityReference>(AttrName).Name;
                                else
                                    str = entity.GetAttributeValue<EntityReference>(AttrName).Id.ToString();
                            }
                            else if (type.ToString().ToLower().Contains("optionsetvalue"))
                            {
                                if (ValueType)
                                    str = entity.FormattedValues[AttrName];
                                else
                                    str = entity.GetAttributeValue<OptionSetValue>(AttrName).Value.ToString();

                            }
                            else if (type.ToString().ToLower().Contains("guid"))
                            {
                                str = entity[AttrName].ToString();
                            }
                            else if (type.ToString().ToLower().Contains("datetime"))
                            {
                                str = DateTime.Parse(entity[AttrName].ToString()).AddHours(8).ToString();
                            }
                            else if (type.ToString().ToLower().Contains("string"))
                            {
                                str = entity[AttrName].ToString();
                            }
                            else if (type.ToString().ToLower().Contains("money"))
                            {
                                str = entity.GetAttributeValue<Money>(AttrName).Value.ToString("N");

                            }
                            else if (type.ToString().ToLower().Contains("decimal"))
                            {
                                str = entity.GetAttributeValue<decimal>(AttrName).ToString("N");

                            }
                            else if (type.ToString().ToLower().Contains("double"))
                            {
                                str = entity.GetAttributeValue<Double>(AttrName).ToString("N");

                            }
                        }

                    }

                }
            }

            return str;
        }