我想在一个数字的千位上加一个逗号。
String.Format()是正确的路径吗?我应该使用什么格式?
我想在一个数字的千位上加一个逗号。
String.Format()是正确的路径吗?我应该使用什么格式?
当前回答
c# 7.1(也许更早?)通过字符串插值使这变得简单而美观:
var jackpot = 1_000_000; // underscore separators in numeric literals also available since C# 7.0
var niceNumberString = $"Jackpot is {jackpot:n}";
var niceMoneyString = $"Jackpot is {jackpot:C}";
其他回答
int number = 1000000000;
string whatYouWant = number.ToString("#,##0");
//You get: 1,000,000,000
这是最好的格式。适用于所有这些情况:
String.Format( "{0:#,##0.##}", 0 ); // 0
String.Format( "{0:#,##0.##}", 0.5 ); // 0.5 - some of the formats above fail here.
String.Format( "{0:#,##0.##}", 12314 ); // 12,314
String.Format( "{0:#,##0.##}", 12314.23123 ); // 12,314.23
String.Format( "{0:#,##0.##}", 12314.2 ); // 12,314.2
String.Format( "{0:#,##0.##}", 1231412314.2 ); // 1,231,412,314.2
$"{1234:n}"; // Output: 1,234.00
$"{1234:n0}"; // No digits after the decimal point. Output: 9,876
c# 7.1(也许更早?)通过字符串插值使这变得简单而美观:
var jackpot = 1_000_000; // underscore separators in numeric literals also available since C# 7.0
var niceNumberString = $"Jackpot is {jackpot:n}";
var niceMoneyString = $"Jackpot is {jackpot:C}";
String.Format("0,###.###"); also works with decimal places