Exportovat (0) Tisk
Rozbalit vše

Choice

Aktualizováno: duben 2012

Rozsah platnosti: Windows Server 2008, Windows Vista

Prompts the user to select one item from a list of single-character choices in a batch program, and then returns the index of the selected choice. If used without parameters, choice displays the default choices Y and N.

For examples of how to use this command, see Examples.

choice [/c [<Choice1><Choice2><…>]] [/n] [/cs] [/t <Timeout> /d <Choice>] [/m <"Text">]

 

Parameter Description

/c <Choice1><Choice2><…>

Specifies the list of choices to be created. Valid choices include a-z, A-Z, 0-9, and extended ASCII characters (128-254). The default list is "YN", which is displayed as [Y,N]?.

/n

Hides the list of choices, although the choices are still enabled and the message text (if specified by /m) is still displayed.

/cs

Specifies that the choices are case-sensitive. By default, the choices are not case-sensitive.

/t <Timeout>

Specifies the number of seconds to pause before using the default choice specified by /d. Acceptable values are from 0 to 9999. If /t is set to 0, choice does not pause before returning the default choice.

/d <Choice>

Specifies the default choice to use after waiting the number of seconds specified by /t. The default choice must be in the list of choices specified by /c.

/m <"Text">

Specifies a message to display before the list of choices. If /m is not specified, only the choice prompt is displayed.

/?

Displays help at the command prompt.

  • The ERRORLEVEL environment variable is set to the index of the key that the user selects from the list of choices. The first choice in the list returns a value of 1, the second a value of 2, and so on. If the user presses a key that is not a valid choice, choice sounds a warning beep. If choice detects an error condition, it returns an ERRORLEVEL value of 255. If the user presses CTRL+BREAK or CTRL+C, choice returns an ERRORLEVEL value of 0.

notePoznámka
When you use ERRORLEVEL values in a batch program, list them in decreasing order.

To present the choices Y, N, and C, type the following line in a batch file:

choice /c ync

The following prompt appears when the batch file runs the choice command:

[Y,N,C]?

To hide the choices Y, N, and C, but display the text "Yes, No, or Continue", type the following line in a batch file:

choice /c ync /n /m "Yes, No, or Continue?"

The following prompt appears when the batch file runs the choice command:

Yes, No, or Continue?
notePoznámka
If you use the /n parameter, but do not use /m, the user is not prompted when choice is waiting for input.

To show both the text and the options used in the previous examples, type the following line in a batch file:

choice /c ync /m "Yes, No, or Continue"

The following prompt appears when the batch file runs the choice command:

Yes, No, or Continue [Y,N,C]?

To set a time limit of five seconds and specify N as the default value, type the following line in a batch file:

choice /c ync /t 5 /d n

The following prompt appears when the batch file runs the choice command:

[Y,N,C]?
notePoznámka
In this example, if the user does not press a key within five seconds, choice selects N by default and returns an error value of 2. Otherwise, choice returns the value corresponding to the user's choice.

Byl tento obsah pro vás užitečný?
(Zbývající počet znaků: 1500)
Děkujeme za váš názor.

Obsah vytvořený komunitou

Zobrazit:
© 2014 Microsoft