如何在c#中将Int 0设置为null [英] How to set Int 0 to null in c#
本文介绍了如何在c#中将Int 0设置为null的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
亲爱的所有人,
请建议一些方法或示例,将Int = 0设置为null,如果Int字段为null或相应为零,则将日期设置为null在C#。
Dear All,
Please suggest some methods or example, to set Int = 0 to null and set the date also null if Int field is null or zero correspondingly in C#.
推荐答案
除非通过在声明中添加?后缀将它们特别声明为可空类型,否则整数不能为空:
Integers cannot be null unless you declare them specifically as a "nullable type" by adding the '?' Suffix to the declaration:
int? myNullableInt = null;
它们是在c#.Net中将int声明为Nullable的两种方法。
第一个是
Nullable< int> i = null;
和第二个是
int? d = null;
Their are two ways to declare int as Nullable in c# .Net.
First one is
Nullable<int> i = null;
and the Second is
int? d = null;
你也可以这样做:
You could also do something like:
public class NullableIntExample
{
private int i = 0;
private DateTime dt = DateTime.Now;
public int? I
{
get
{
if (this.i == 0)
{
return null;
}
else
{
return this.i;
}
}
public DateTime? DT
{
get
{
if (this.i == 0)
{
return null;
}
else
{
return this.dt;
}
}
}
这篇关于如何在c#中将Int 0设置为null的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文