批处理文件来环路菜单 [英] Batch File To Loop Menu

问题描述

我创建一个批处理文件，当我登录到我的用户帐户将启动。我跟着本教程创建批处理文件的菜单。然而，它的工作原理，如果用户输入未列出一个数字，我希望它回到菜单。我将如何实现呢？

边注：我明白我可以使用一些更灵活的像PowerShell的，但是，我preFER批处理文件

下面是我到目前为止有：

  @ECHO OFF
CLS
：菜单
呼应欢迎％USERNAME％回声1  - 开始的KeePass
回声2  - 备份
回声3  - 退出SET / P M = 1,2,3型则preSS输入：
IF％M％== 1 GOTO StarKeePass
IF％M％== 2 GOTO备份
IF％M％== 3 GOTO：EOF
：StarKeePass
SET的KeePass =％USERPROFILE％\\ KeePass的\\ KeePass的-2.30 \\ KeePass.exe
SET KDB =％USERPROFILE％\\ KeePass的\\ PasswordDatabase \\ PasswordDatabase.kdbx回声我会开始KeePass的适合你
开始→％的KeePass％％KDB％GOTO MENU：备份
设置备份=％USERPROFILE％\\ BACKUP.BAT
打电话％备份％GOTO MENU
 

解决方案

要建立使用菜单设置/ P ，我建议以下变化：

• 所有的如果查询后，把转到：MENU 赶上意想不到的条目;


• 重置的东西选择变量如设置选择=的设置/ P 命令之前，因为设置/ P 保持变量的前值的情况下，用户presses只是<大骨节病> ENTER ;


• 把报价，围绕在如果语句前pressions避免的情况下，语法错误该变量为空或包含一些字符有特殊的含义（ ^ ＆安培; （ ） ＆LT; ＆GT; | ;的字符还是引起问题虽然）;


• 使用语法报价设置[/ p]SELECT =什么来避免特殊字符的麻烦;


• 在大小写字母的查询，添加 / I 开关置于如果来强制区分大小写的比较;


• 如果你愿意，你可以在后，把 CLS 命令：MENU 标签，让屏幕建成高达每次返回菜单;

下面是一个例子，演示了什么，我说什么：

 关闭@echo：菜单
CLS
回声---主菜单---
回声1  - 做点什么
回音2  - 做别的事情
回声Q  - 退出设置选择=
集/ PSELECT = 1型，2或Q＆LT;输入计算值：
如果SELECT％％= =1GOTO：某处
如果SELECT％％==2GOTO：SOMEWHERE_ELSE
如果/ ISELECT％％==QGOTO：EOF
转到：MENU：某处
REM做一些事情在这里...
回声。
回声打印一些文字。
暂停
转到：MENU：别的地方
REM做别的事情在这里...
回声。
回声打印一些其他文本。
暂停
转到：MENU
 

---

要避免与字符上述烦恼，修改设置/ P 块如下：

 设置选择=
集/ PSELECT = 1型，2或Q＆LT;输入计算值：
设置选择=％选择：=％
如果SELECT％％= =1GOTO：某处
如果SELECT％％==2GOTO：SOMEWHERE_ELSE
如果/ ISELECT％％==QGOTO：EOF
转到：MENU
 

I'm creating a batch file that will launch when I login to my user account. I followed this tutorial to create a batch file with a menu. It works, however, if the user enters a number that is not listed, I want it to go back to the menu. How would I implement that?

Side note: I understand I could use something more flexible like Powershell, however, I prefer batch files.

Here is what I have so far:

@ECHO OFF
CLS
:MENU
echo Welcome %USERNAME%

echo 1 - Start KeePass
echo 2 - Backup
echo 3 - Exit

SET /P M=Type 1,2,3 then press Enter:


IF %M%==1 GOTO StarKeePass
IF %M%==2 GOTO Backup
IF %M%==3 GOTO :EOF


:StarKeePass
SET keePass="%USERPROFILE%\KeePass\KeePass-2.30\KeePass.exe"
SET kdb="%USERPROFILE%\KeePass\PasswordDatabase\PasswordDatabase.kdbx"

echo I'll start KeePass for You
START "" %keePass% %kdb% 

GOTO MENU

:Backup
SET backup="%USERPROFILE%\backup.bat"
call %backup%

GOTO MENU

解决方案

To build a menu using set /P, I recommend the following changes:

• after all the if queries, put a goto :MENU to catch unintended entries;
• reset the selection variable by something like set "SELECT=" before the set /P command, because set /P keep the former value of the variable in case the user presses just ENTER;
• put quotes "" around the expressions in the if statements to avoid syntax errors in case the variable is empty or it contains some characters that have special meanings (^ & ( ) < > |; the " character still causes problems though);
• use the quoted syntax set [/P] "SELECT=anything" to avoid trouble with special characters;
• in case letters are queried, add the /I switch to if to force case-insensitive comparison;
• if you wish, you could put a cls command after the :MENU label to let the screen be built up every time you return to the menu;

Here is an example that demonstrates what I am talking about:

@echo off

:MENU
cls
echo --- MAIN MENU ---
echo 1 - do something
echo 2 - do something else
echo Q - quit

set "SELECT="
set /P "SELECT=Type 1, 2, or Q <Enter>: "
if "%SELECT%"=="1" GOTO :SOMEWHERE
if "%SELECT%"=="2" GOTO :SOMEWHERE_ELSE
if /I "%SELECT%"=="Q" GOTO :EOF
goto :MENU

:SOMEWHERE
rem do something here...
echo.
echo Print some text.
pause
goto :MENU

:SOMEWHERE_ELSE
rem do something else here...
echo.
echo Print some other text.
pause
goto :MENU

---

To avoid the above mentioned troubles with the " character, modify the set /P block as follows:

set "SELECT=""
set /P "SELECT=Type 1, 2, or Q <Enter>: "
set "SELECT=%SELECT:"=%"
if "%SELECT%"=="1" GOTO :SOMEWHERE
if "%SELECT%"=="2" GOTO :SOMEWHERE_ELSE
if /I "%SELECT%"=="Q" GOTO :EOF
goto :MENU

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