C#中的日期时间添加天数 [英] Datetime in C# add days

问题描述

我想在某个日期添加天数.我有这样的代码:

I want to add days in some date. I have a code like this:

DateTime endDate = Convert.ToDateTime(this.txtStartDate.Text); 
Int64 addedDays = Convert.ToInt64(txtDaysSupp.Text); 
endDate.AddDays(addedDays); 
DateTime end = endDate; 
this.txtEndDate.Text = end.ToShortDateString();

但是这个代码不行，天数不加！我在做什么愚蠢的错误?

But this code is not working, days are not added! What the stupid mistake I'm doing?

推荐答案

DateTime 是不可变的.这意味着你不能改变它的状态，而必须将一个操作的结果赋给一个变量.

DateTime is immutable. That means you cannot change it's state and have to assign the result of an operation to a variable.

endDate = endDate.AddDays(addedDays);

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