如果<condition>表达式为 false,则执行<if-false>表达式 例如: PowerShell复制 $message= (Test-Path$path) ?"Path exists":"Path not found" 在此示例中,当 返回 时,$message的值为Path exists。Test-Path$true$false返回 时Test-Path,的$messagePath
53410 SQL Server判断表中是否存在记录的SQL语句 SQL Server数据库判断记录是否存在,要不是语句不够简洁,要不就是性能有很大问题,简直就是忍无可忍!...如果只是判断记录是否存在,而不需要获取实际表中的记录数,推荐做法: IF EXISTS (SELECT 1 FROM dbo.TableName) BEGIN PRINT '1'; --存在记录 5.4K20 ...
if (Test-Path -Path "$registryPath\$subKey") { $value = Get-ItemProperty -Path "$registryPath\$subKey" -Name $valueName -ErrorAction SilentlyContinue if ($value -ne $null) { Write-Output "找到注册表项 $registryPath\$subKey 中的值 $valueName" $exists = $true } } } # 如果不存在...
powerline 字体letg:airline#extensions#tabline#enabled=1""显示窗口tab和buffer"let g:airline_theme='moloai' "murmur配色不错if!exists('g:airline_symbols')letg:airline_symbols={}endifletg:airline_left_sep='▶'letg:airline_left_alt_sep='❯'letg:airline_right_sep='◀'letg:airline_right_alt...
Hence all tables in the drive represented will have to be // returned if (PathIsDrive(path)) { foreach (DatabaseTableInfo table in GetTables()) { WriteItemObject(table, path, true); // if the specified item exists and recurse has been set then // all child items w...
如果<condition>運算式為 False,就會執行<if-false>運算式 例如: PowerShell $message= (Test-Path$path) ?"Path exists":"Path not found" 在此範例中,如果路徑存在,就會顯示Path exists。 如果路徑不存在,則會顯示找不到路徑。 如需詳細資訊,請參閱關於 If。
得知处理进程的命令有这些 然后再用Get-Help Get-Process -full就能得到Get-Process的详细用法以及使用范例 基本语法 背景 PowerShell是一个强类型(变量一旦定义,其本身类型不可改变就是强类型,反之就是弱类型)的动态脚本语言,支持面向对象,支持调用系统API和.NET库。 受到了Python,Ksh,Perl,C#,CL,DCL,SQL,Tcl,Tk...
protectedoverrideboolItemExists(stringpath){// check if the path represented is a driveif(PathIsDrive(path)) {returntrue; }// Obtain type, table name and row number from pathstringtableName;introwNumber; PathType type = GetNamesFromPath(path,outtableName,outrowNumber); DatabaseTableInfo tabl...
functionGet-Pipeline{process{"The value is:$_"} }1,2,4|Get-Pipeline Output The value is: 1 The value is: 2 The value is: 4 If you want a function that can take pipeline input or input from a parameter, then theprocessblock needs to handle both cases. For example: ...
If the profile exists this command will return True; if it doesn’t exist, the command will return False. If this command returns False, you need to create the profile. Creating a profile in Windows XP is really easy. Simply type this at the command prompt: ...