写一个小的命令行工具,用不同的颜色输出会很好。这可能吗?


当前回答

一种同时给多个单词上色的示例方法。

private static void WriteColor(string str, params (string substring, ConsoleColor color)[] colors)
{
    var words = Regex.Split(str, @"( )");

    foreach (var word in words)
    {
        (string substring, ConsoleColor color) cl = colors.FirstOrDefault(x => x.substring.Equals("{" + word + "}"));
        if (cl.substring != null)
        {
            Console.ForegroundColor = cl.color;
            Console.Write(cl.substring.Substring(1, cl.substring.Length - 2));
            Console.ResetColor();
        }
        else
        {
            Console.Write(word);
        }
    }
}

用法:

WriteColor("This is my message with new color with red", ("{message}", ConsoleColor.Red), ("{with}", ConsoleColor.Blue));

输出:

其他回答

class Program
{
    static void Main()
    {
        Console.BackgroundColor = ConsoleColor.Blue;
        Console.ForegroundColor = ConsoleColor.White;
        Console.WriteLine("White on blue.");
        Console.WriteLine("Another line.");
        Console.ResetColor();
    }
}

从这里拍的。

我发现给控制台输出片段着色的最简单方法是在Windows控制台中使用ANSI转义序列。

public static int Main(string[] args)
{
    string NL          = Environment.NewLine; // shortcut
    string NORMAL      = Console.IsOutputRedirected ? "" : "\x1b[39m";
    string RED         = Console.IsOutputRedirected ? "" : "\x1b[91m";
    string GREEN       = Console.IsOutputRedirected ? "" : "\x1b[92m";
    string YELLOW      = Console.IsOutputRedirected ? "" : "\x1b[93m";
    string BLUE        = Console.IsOutputRedirected ? "" : "\x1b[94m";
    string MAGENTA     = Console.IsOutputRedirected ? "" : "\x1b[95m";
    string CYAN        = Console.IsOutputRedirected ? "" : "\x1b[96m";
    string GREY        = Console.IsOutputRedirected ? "" : "\x1b[97m";
    string BOLD        = Console.IsOutputRedirected ? "" : "\x1b[1m";
    string NOBOLD      = Console.IsOutputRedirected ? "" : "\x1b[22m";
    string UNDERLINE   = Console.IsOutputRedirected ? "" : "\x1b[4m";
    string NOUNDERLINE = Console.IsOutputRedirected ? "" : "\x1b[24m";
    string REVERSE     = Console.IsOutputRedirected ? "" : "\x1b[7m";
    string NOREVERSE   = Console.IsOutputRedirected ? "" : "\x1b[27m";

    Console.WriteLine($"This is {RED}Red{NORMAL}, {GREEN}Green{NORMAL}, {YELLOW}Yellow{NORMAL}, {BLUE}Blue{NORMAL}, {MAGENTA}Magenta{NORMAL}, {CYAN}Cyan{NORMAL}, {GREY}Grey{NORMAL}! ");
    Console.WriteLine($"This is {BOLD}Bold{NOBOLD}, {UNDERLINE}Underline{NOUNDERLINE}, {REVERSE}Reverse{NOREVERSE}! ");
}

输出:

NOBOLD代码实际上是“正常强度”。详见维基百科链接页面上的“SGR(选择图形再现)参数”部分。

重定向测试避免将转义序列输出到文件中,如果输出被重定向。如果用户有一个非黑白配色方案,它将不会被重置,但你可以使用控制台功能来保存/恢复用户的配色方案在程序的开始和结束,如果这很重要的话。

下面是一个优雅的实现,它使用了dotnet新的字符串插值特性。

[InterpolatedStringHandler]
public ref struct ConsoleInterpolatedStringHandler
{
    private static readonly Dictionary<string, ConsoleColor> colors;
    private readonly IList<Action> actions;

    static ConsoleInterpolatedStringHandler() =>
        colors = Enum.GetValues<ConsoleColor>().ToDictionary(x => x.ToString().ToLowerInvariant(), x => x);

    public ConsoleInterpolatedStringHandler(int literalLength, int formattedCount)
    {
        actions = new List<Action>();
    }

    public void AppendLiteral(string s)
    {
        actions.Add(() => Console.Write(s));
    }

    public void AppendFormatted<T>(T t)
    {
        actions.Add(() => Console.Write(t));
    }

    public void AppendFormatted<T>(T t, string format)
    {
        if (!colors.TryGetValue(format, out var color))
            throw new InvalidOperationException($"Color '{format}' not supported");

        actions.Add(() =>
        {
            Console.ForegroundColor = color;
            Console.Write(t);
            Console.ResetColor();
        });
    }

    internal void WriteLine() => Write(true);
    internal void Write() => Write(false);

    private void Write(bool newLine)
    {
        foreach (var action in actions)
            action();

        if (newLine)
            Console.WriteLine();
    }
}

要使用它,创建一个类,例如ExtendedConsole:

internal static class ExtendedConsole
{
    public static void WriteLine(ConsoleInterpolatedStringHandler builder)
    {
        builder.WriteLine();
    }

    public static void Write(ConsoleInterpolatedStringHandler builder)
    {
        builder.Write();
    }
}

然后,像这样使用它:

        var @default = "default";
        var blue = "blue";
        var green = "green";
        ExtendedConsole.WriteLine($"This should be {@default}, but this should be {blue:blue} and this should be {green:green}");

是的,这很简单,也有可能。定义第一个默认颜色。

Console.BackgroundColor = ConsoleColor.Black;
Console.ForegroundColor = ConsoleColor.White;
Console.Clear();

console . clear()对于设置新的控制台颜色很重要。如果不执行此步骤,则在使用Console.ReadLine()请求值时可以看到组合颜色。

然后你可以改变每个打印的颜色:

Console.BackgroundColor = ConsoleColor.Black;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Red text over black.");

当完成程序时,记得在完成时重置控制台颜色:

Console.ResetColor();
Console.Clear();

现在对于netcore,我们有另一个问题,如果你想“保留”用户体验,因为终端在每个操作系统上有不同的颜色。

我正在制作一个库,用文本格式解决这个问题:颜色,对齐和更多。请随意使用和贡献。

https://github.com/deinsoftware/colorify/,也可作为NuGet包

Windows/Linux的颜色(深色):

MacOS的颜色(浅色):

只是补充上面的答案,所有使用控制台。要改变同一行文本的颜色,可以这样写:

Console.Write("This test ");
Console.BackgroundColor = bTestSuccess ? ConsoleColor.DarkGreen : ConsoleColor.Red;
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine((bTestSuccess ? "PASSED" : "FAILED"));
Console.ResetColor();