C＃ - 增量数量，并保持在前面的零 [英] C# - increment number and keep zeros in front

问题描述

我需要一个40位的计数器变量。它的开头应为 0000000000000000000000000000000000000001 结果
和增量结果
0000000000000000000000000000000000000002

I need to make a 40 digit counter variable. It should begin as 0000000000000000000000000000000000000001
and increment to
0000000000000000000000000000000000000002

当我使用 INT 类，它切断所有的零。问题是，我需要增加数量，然后将其转换为字符串，正确数量的前导零。总大小应为40位数字。所以，如果我打50为例，它应该是这样的：

When I use the int class, it cuts off all the zeros. Problem is I need to increment the number and then convert it to a string, with the correct number of leading zeros. The total size should be 40 digits. So if I hit 50 for example, it should look like this:

0000000000000000000000000000000000000050

我怎么能做到这一点，并保留了零？

How can I do that and retain the zeros?

推荐答案

使用的整数格式或垫当你转换为字符串的结果。如

Use the integer and format or pad the result when you convert to a string. Such as

int i = 1;
string s = i.ToString().PadLeft(40, '0');

请参阅叶普斯蒂格尼尔森的回答了解，我也永远记得格式化选项。

See Jeppe Stig Nielson's answer for a formatting option that I can also never remember.

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