日期时间在C＃中添加天 [英] Datetime in C# add days

问题描述

我想在某些日期添加天。我有一个code是这样的：

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code不工作，天不会添加！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

日期时间是不变的。这意味着你不能改变它的状态，并有一个操作的结果分配给一个变​​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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