我如何获得当前行号? [英] How do I get the current line number?
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问题描述
下面是我所想要做的例子:
Here is an example of what I want to do:
MessageBox.Show("Error line number "+CurrentLineNumber);
当前行号将在这片code的来源$ C $ c中的行数。
Current line number will be the line number in the source code of this piece of code.
我怎么能这样做?
推荐答案
在.NET 4.5 / C#5,可以让编译器做这个工作对你来说,通过编写使用新的呼叫者属性的实用方法:
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:
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:
在嘘39行(SomeMethodSomewhere)
Boo at line 39 (SomeMethodSomewhere)
还有 [CallerFilePath]
它告诉你原来的code文件的路径。
There's also [CallerFilePath]
which tells you the path of the original code file.
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