将double转换为字符串（C＃）

Question

Convert a double from 12.45 to a string like 00001245 (length of the string = 8).

How could I do that?

Answer 1

String.Format("{0:D8}", (int)(12.45 * 100));

Answer 2

You can do something like:

• Multiply it with 100, to get rid of the .

• Cast it to an int , to get rid of leftover decimals.

• Convert it to a string with ToString()

• And pad it on the left with a totalsize of 8 with '0'

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double d = 12.45;
string value = ((int)(d * 100)).ToString().PadLeft(8, '0');

Answer 3

If your double always has 2 digits after comma, looks like you need to multiply with 100 and use String.PadLeft method until you get 8 length of string.

double d = 12.45;
Console.WriteLine((d * 100).ToString().PadLeft(8, '0'));

Output will be;

00001245

Here a DEMO .

Answer 4

也可以这样做：

String.Format("{0:00000000}", 12.45 * 100)