c# - 我怎样才能得到日期的年份

Question

我想从mongodb. 这是我的简单脚本：

DateTime sDate = DateTime.SpecifyKind(new DateTime(2013, 1, 15, 00, 00, 00), DateTimeKind.Utc);
DateTime eDate = DateTime.SpecifyKind(new DateTime(2014, 12, 31, 23, 59, 59), DateTimeKind.Utc);

string map = @ "function(){
                                emit (_id.OwnerId, _id.Date {
                                    Date: Value.Date.getYear(),
                                    PurchaseAmount: parseFloat(Value.PurchaseAmount),
                                    PurchaseReturnAmount: parseFloat(Value.PurchaseReturnAmount),
                                    TotalAmount: parseFloat(Value.TotalAmount)
                                });
                           }";
string reduce = @ "function (key, values) {
                        var outValue = {purchsaeAmount:0 , purchaseReturnAmount:0, totalAmount:0 }
                        values.forEach(function (value) {
                        outValue.PurchaseAmount +=parseFloat(value.PurchaseAmount);
                        outValue.PurchaseReturnAmount +=parseFloat(value.PurchaseReturnAmount);
                        outValue.TotalAmount +=parseFloat(value.TotalAmount);
                        });
                            return outValue;
                        }";

在地图中我只想得到年份，我怎样才能得到开始年份（2013）和结束年份（2014）？

Answer 1

var d = new Date();
var n = d.getFullYear();
var next_year = d.getFullYear()+1

出去：

2013 2014