如何在异常中打印完整堆栈跟踪？

Question

例如,在一个地方......

//---------------a
try
{
    // some network call
}
catch(WebException we)
{
    throw new MyCustomException("some message ....", we);
}

......在另一个地方......

//--------------b
try
{
    // invoke code above
}
catch(MyCustomException we)
{
    Debug.Writeline(we.stacktrace);   // <----------------
}

我打印的堆栈跟踪,它只从a到b开始,它不包含WebException的内部堆栈跟踪.

如何打印所有堆栈跟踪???

Answer 1

我通常在异常上使用.ToString()方法在文本中显示完整的异常信息(包括内部堆栈跟踪):

catch (MyCustomException ex)
{
    Debug.WriteLine(ex.ToString());
}

样本输出:

ConsoleApplication1.MyCustomException: some message .... ---> System.Exception: Oh noes!
   at ConsoleApplication1.SomeObject.OtherMethod() in C:\ConsoleApplication1\SomeObject.cs:line 24
   at ConsoleApplication1.SomeObject..ctor() in C:\ConsoleApplication1\SomeObject.cs:line 14
   --- End of inner exception stack trace ---
   at ConsoleApplication1.SomeObject..ctor() in C:\ConsoleApplication1\SomeObject.cs:line 18
   at ConsoleApplication1.Program.DoSomething() in C:\ConsoleApplication1\Program.cs:line 23
   at ConsoleApplication1.Program.Main(String[] args) in C:\ConsoleApplication1\Program.cs:line 13

Answer 2

使用这样的函数:

    public static string FlattenException(Exception exception)
    {
        var stringBuilder = new StringBuilder();

        while (exception != null)
        {
            stringBuilder.AppendLine(exception.Message);
            stringBuilder.AppendLine(exception.StackTrace);

            exception = exception.InnerException;
        }

        return stringBuilder.ToString();
    }

然后你可以像这样调用它:

try
{
    // invoke code above
}
catch(MyCustomException we)
{
    Debug.Writeline(FlattenException(we));
}

Answer 3

如果将异常传递给以下函数,它将为您提供所有方法和详细信息,这些都是异常的原因.

public string GetAllFootprints(Exception x)
{
        var st = new StackTrace(x, true);
        var frames = st.GetFrames();
        var traceString = new StringBuilder();

        foreach (var frame in frames)
        {
            if (frame.GetFileLineNumber() < 1)
                continue;

            traceString.Append("File: " + frame.GetFileName());
            traceString.Append(", Method:" + frame.GetMethod().Name);
            traceString.Append(", LineNumber: " + frame.GetFileLineNumber());
            traceString.Append("  -->  ");
        }

        return traceString.ToString();
}

结果:

文件:c:\ MyProject\Program.cs,方法:MyFunction,LineNumber:29 - >
文件:c:\ MyProject\Program.cs,方法:Main,LineNumber:16 - >