如何获取当前行号?

问题描述：

这是我想做的一个例子:

Here is an example of what I want to do:

MessageBox.Show("Error line number " + CurrentLineNumber);

在CurrentLineNumber上面的代码中，应该是这段代码的源代码中的行号.

In the code above the CurrentLineNumber, should be the line number in the source code of this piece of code.

我该怎么做?

答

在 .NET 4.5/C# 5 中，您可以通过编写使用新调用者属性的实用方法，让编译器为您完成这项工作:

In .NET 4.5 / C# 5, you can get the compiler to do this work for you, by writing a utility method that uses the new caller attributes:

using System.Runtime.CompilerServices;

static void SomeMethodSomewhere()
{
    ShowMessage("Boo");
}
...
static void ShowMessage(string message,
    [CallerLineNumber] int lineNumber = 0,
    [CallerMemberName] string caller = null)
{
     MessageBox.Show(message + " at line " + lineNumber + " (" + caller + ")");
}

这将显示，例如:

第 39 行的嘘声(SomeMethodSomewhere)

Boo at line 39 (SomeMethodSomewhere)

还有 [CallerFilePath] 告诉你原始代码文件的路径.

There's also [CallerFilePath] which tells you the path of the original code file.

如何获取当前行号?

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