IFEXISTfilename( delfilename. )ELSE( echofilename missing. ) 2)IF [NOT] EXIST filename command 如果指定的文件名存在,指定条件为 true。 IF [NOT] ERRORLEVEL number command 如果最后运行的程序返回一个等于或大于指定数字的退出代码,指定条件为 true。 IF [NOT] string1==string2 command 如果指定的文...
Performs conditional processing in batch programs. Syntax if[not]errorlevelnumbercommand[elseexpression] if[not]string1**==**string2command[elseexpression] if[not]existFileNamecommand[elseexpression] If command extensions are enabled, use the following syntax: ...
)The following would NOT work because the del command needs to be terminated by a newline:由于 del 命令需要用新的一行终止,因此以下子句不会有效:IF EXIST filename. del filename. ELSE echo filename. missingNor would the following work,since the ELSE command must be on the same line as the...
Performs conditional processing in batch programs. Syntax if [not] errorlevel Number Command [else Expression] if [not] String1**==**String2 Command [else Expression] if [not] exist FileName Command [else Expression] If command extensions are enabled, use the following syntax: if [/i] Strin...
Performs conditional processing in batch programs. Syntax Copy if [not] ERRORLEVEL <number> <command> [else <expression>] if [not] <string1>==<string2> <command> [else <expression>] if [not] exist <filename> <command> [else <expression>] If command extensions are enabled, use the ...
Performs conditional processing in batch programs. For examples of how to use this command, see Examples. Syntax 复制 if [not] ERRORLEVEL <Number> <Command> [else <Expression>] if [not] <String1>==<String2> <Command> [else <Expression>] if [not] exist <FileName> <Command> [else <...
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'Set-ExecutionPolicy' is not recognized as an internal or external command 'Unshare' 100+ dead print queues "Get-AzureVM" Powershell Command not recognized in application after deploying to IIS. "Get-EventLog : Requested registry access is not allowed." is returned after adding a where-object...
The file specified for :r command was not found error, please help. A file activation error occurred. The physical file name may be incorrect while creating database A practical approach the Nested Sets when creating hierarchies. A question about regular expressions in T-SQL A stored procedure ...
This behaviour relies on a % command \cmd{\urldoi} provided in the \texttt{.bbl} file. If % needed, this command may be redefined by the user. % \item The command \cmd{\urlprefix} is empty. Again, this may be % redefined by the user. % \item The quotes «~» are typeset...