是否有内置的方法来确定递归级别？ [英] Is there a built in way to determine the recursion level?

问题描述

在SQL Server中有@@ NESTLEVEL，它在递归函数调用中返回当前的

级别数。是否有一个C＃等价物来获得递归方法调用的当前级别

？我希望能够在任何给定的时间点告诉我多少级别。


谢谢


JIM

In SQL Server there is @@NESTLEVEL which returns the current number of
levels down in a recursive function call. Is there a C# equivilant to get
the current level of a recursive method call? I would like to be able to
tell how many levels down I am at any given point.

thanks

JIM

推荐答案

" james" <无**** @ hypercon.net>在消息中写道

新闻：uT ************** @ TK2MSFTNGP15.phx.gbl ...

"james" <no****@hypercon.net> wrote in message
news:uT**************@TK2MSFTNGP15.phx.gbl...

在SQL Server中有@@ NESTLEVEL，它在递归函数调用中返回当前的
级别数。是否有一个C＃等效来获得递归方法调用的当前级别？我希望能够告诉我在任何给定点上有多少级别。

In SQL Server there is @@NESTLEVEL which returns the current number of
levels down in a recursive function call. Is there a C# equivilant to get
the current level of a recursive method call? I would like to be able to
tell how many levels down I am at any given point.

不是真的，但你可以访问这个电话stack：


StackTrace trace = new StackTrace（true）;

int stackFrames = trace.FrameCount;


这与@@ NESTLEVEL不一样，但每个方法都会增加

来电。


-

Mickey Williams

作者，Visual C＃.NET Core Ref，MS Press
www.neudesic.com
www.servergeek.com

没有AFAIK，您可以尝试使用StackTrace并浏览StackFrames

计数。


或者您可以使用计数器实现它并将其作为参数传递。


欢呼，

-

Ignacio Machi n，

ignacio.machin AT dot.state.fl.us

佛罗里达州交通局


" james" <无**** @ hypercon.net>在消息中写道

新闻：uT ************** @ TK2MSFTNGP15.phx.gbl ...

Hi,

NO AFAIK, you could try to use StackTrace and go over the StackFrames
counting.

Or you could implement it using a counter and passing it as a parameter.

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"james" <no****@hypercon.net> wrote in message
news:uT**************@TK2MSFTNGP15.phx.gbl...

在SQL Server中有@@ NESTLEVEL，它在递归函数调用中返回当前的
级别数。是否有一个C＃等效来获得递归方法调用的当前级别？我希望能够告诉我在任何给定点上有多少级别。

感谢

JIM

In SQL Server there is @@NESTLEVEL which returns the current number of
levels down in a recursive function call. Is there a C# equivilant to get
the current level of a recursive method call? I would like to be able to
tell how many levels down I am at any given point.

thanks

JIM

我通常只是通过添加一个类变量计数器来编写代码。例如


private int m_iMRGLevel;

private void FnCallingMRF（）

{

m_iMRGLevel = 0 ;

MyRecursiveFunction（）;

}

private void MyRecursiveFunction（）

{

m_iMRFLevel ++;

//更多代码

if（someCondition）

MyRecursiveFunction（）;

}


当然，你也可以使用这样的ref参数：

private void FnCallingMFR（）

{

int iLevel = 0;

MyRecursiveFunction（ref iLevel）;

}

private void MyRecursiveFunction（ref int level）

{

level ++;

if（someCondition）

MyRecursiveFunction（ref level）;

}


" james" <无**** @ hypercon.net>在消息中写道

新闻：uT ************** @ TK2MSFTNGP15.phx.gbl ...

I usually just code it by adding a class variable counter. E.g.

private int m_iMRGLevel;
private void FnCallingMRF()
{
m_iMRGLevel = 0;
MyRecursiveFunction();
}
private void MyRecursiveFunction()
{
m_iMRFLevel++;
// More code
if( someCondition )
MyRecursiveFunction();
}

Of course, you can also use a ref parameter like this:
private void FnCallingMFR()
{
int iLevel = 0;
MyRecursiveFunction( ref iLevel );
}
private void MyRecursiveFunction( ref int level )
{
level++;
if( someCondition )
MyRecursiveFunction( ref level );
}

"james" <no****@hypercon.net> wrote in message
news:uT**************@TK2MSFTNGP15.phx.gbl...

在SQL Server中有@@ NESTLEVEL，它在递归函数调用中返回当前的
级别数。是否有一个C＃等效来获得递归方法调用的当前级别？我希望能够告诉我在任何给定点上有多少级别。

感谢

JIM

In SQL Server there is @@NESTLEVEL which returns the current number of
levels down in a recursive function call. Is there a C# equivilant to get
the current level of a recursive method call? I would like to be able to
tell how many levels down I am at any given point.

thanks

JIM

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