填充輸出

可以格式化字串以接受填充引數，該引數將指定插入的字串將使用的字元位置數：

${value, padding}

注意： 正填充值表示左填充，負填充值表示右填充。

左邊填充

左邊填充為 5（在數字值之前新增 3 個空格，因此在結果字串中總共佔用 5 個字元位置。）

var number = 42;
var str = $"The answer to life, the universe and everything is {number, 5}.";
//str is "The answer to life, the universe and everything is    42.";
//                                                           ^^^^^
System.Console.WriteLine(str);

輸出：

The answer to life, the universe and everything is    42.

.NET 小提琴現場演示

右邊填充

右邊的填充（使用負填充值）將在當前值的末尾新增空格。

var number = 42;
var str = $"The answer to life, the universe and everything is ${number, -5}.";
//str is "The answer to life, the universe and everything is 42   .";
//                                                           ^^^^^
System.Console.WriteLine(str);

輸出：

The answer to life, the universe and everything is 42   .

.NET 小提琴現場演示

使用格式說明符填充

你還可以將現有格式說明符與填充結合使用。

var number = 42;
var str = $"The answer to life, the universe and everything is ${number, 5:f1}";
//str is "The answer to life, the universe and everything is 42.1 ";
//                                                           ^^^^^

.NET 小提琴現場演示