将Decimal转换为非默认格式的字符串

Question

我需要将十进制转换为字符串,在此标尺中:

120.00 - "120"
120.01 - "120.01"
120.50 - "120.50"

Answer 1

您可以使用decimal.ToString覆盖指定格式.

decimal amount = 120.00m;
string str = amount.ToString("0.00");

使用时也可以使用String.Format.

Console.WriteLine("{0:0.00}", amount); 

在第一条规则的情况下,不能在一行上完成.

decimal amount = 120.00m;
string str = amount.ToString("0.00").Replace(".00", String.Empty);

Answer 2

decimal.ToString根据您想要的格式,有不同的重载.

例

decimal d = 5.00
Console.WriteLine(d.ToString("C")); // for currency

请参阅下面的其他重载... specifier是你投入的ToString(specifier)

关于Decimal.ToString的MSDN文档

十进制值= 16325.62m; 字符串说明符;

// Use standard numeric format specifiers.
specifier = "G";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    G: 16325.62
specifier = "C";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    C: $16,325.62
specifier = "E04";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    E04: 1.6326E+004
specifier = "F";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    F: 16325.62
specifier = "N";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    N: 16,325.62
specifier = "P";
Console.WriteLine("{0}: {1}", specifier, (value/10000).ToString(specifier));
// Displays:    P: 163.26 %

// Use custom numeric format specifiers.
specifier = "0,0.000";
Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));
// Displays:    0,0.000: 16,325.620
specifier = "#,#.00#;(#,#.00#)";
Console.WriteLine("{0}: {1}", specifier, (value*-1).ToString(specifier));
// Displays:    #,#.00#;(#,#.00#): (16,325.62)