{"id":33111,"date":"2010-11-20T17:45:04","date_gmt":"2010-11-20T16:45:04","guid":{"rendered":"https:\/\/www.fuhaijun.com\/?p=33111"},"modified":"2024-11-06T11:22:38","modified_gmt":"2024-11-06T03:22:38","slug":"windows-powershell-2-0%e4%b9%8b%e8%84%9a%e6%9c%ac%e5%9d%97%e5%8f%98%e9%87%8f%e4%bd%9c%e7%94%a8%e5%9f%9f","status":"publish","type":"post","link":"https:\/\/www.fuhaijun.com\/?p=33111","title":{"rendered":"Windows PowerShell 2.0\u4e4b\u811a\u672c\u5757\u53d8\u91cf\u4f5c\u7528\u57df"},"content":{"rendered":"

\u53d8\u91cf\u4f5c\u7528\u57df\u7528\u6765\u5b9a\u4e49\u7a0b\u5e8f\u4e2d\u54ea\u4e9b\u90e8\u5206\u53ef\u4ee5\u4f7f\u7528\u67d0\u4e2a\u53d8\u91cf\u3002PowerShell\u4e2d\u5bf9\u8c61\u7684\u4f5c\u7528\u57df\u89c4\u5219\u8bbe\u8ba1\u5f97\u5f88\u5de7\u5999\uff0c\u7c7b\u4f3c\u53d8\u91cf\uff0c\u4f46\u662f\u5374\u66f4\u5f3a\u5927\uff0c\u5728\u811a\u672c\u5757\u3001\u51fd\u6570\u548c\u811a\u672c\u8fb9\u754c\u4f20\u9012\u3002\u672c\u6587\u4ec5\u7ed9\u51fa\u811a\u672c\u5757\u4e2d\u4f5c\u7528\u57df\u7684\u6e05\u6670\u5b9a\u4e49\uff0c\u5176\u4ed6\u6709\u5173\u51fd\u6570\u548c\u811a\u672c\u6587\u4ef6\u7684\u4f5c\u7528\u57df\u4f1a\u5206\u5176\u4ed6\u7cfb\u5217\u6587\u7ae0\u4e2d\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n

\u53d8\u91cf\u4f5c\u7528\u57df\u5b9a\u4e49<\/b><\/p>\n

\u4f5c\u7528\u57df\u662f\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\u7528\u4e8e\u5b9a\u4e49\u53d8\u91cf\u53ef\u4ee5\u5728\u54ea\u4e9b\u4ee3\u7801\u533a\u57df\u4e2d\u8d77\u4f5c\u7528\uff0c\u7c7b\u4f3c\u4e8e\u547d\u540d\u7a7a\u95f4\u3002\u8fd9\u79cd\u673a\u5236\u5141\u8bb8\u7528\u4e8e\u5728\u4e0d\u540c\u7684\u73af\u5883\u4e0b\u4f7f\u7528\u76f8\u540c\u547d\u540d\u7684\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u4e0d\u4f1a\u56e0\u4e3a\u547d\u540d\u76f8\u540c\u800c\u9020\u6210\u51b2\u7a81\u3002\u5f88\u5c11\u6709\u8bed\u8a00\u4e0d\u652f\u6301\u4e0d\u540c\u53d8\u91cf\u6709\u4e0d\u540c\u4f5c\u7528\u57df\u7684\u6982\u5ff5\uff0c\u5373\u6bcf\u4e2a\u53d8\u91cf\u5728\u4efb\u4f55\u5730\u65b9\u90fd\u6709\u6548\u3002\u5728\u4ee3\u7801\u91cf\u8f83\u5927\u7684\u60c5\u51b5\u4e0b\uff0c\u4e3a\u4ee3\u7801\u7f16\u5199\u5236\u9020\u4e86\u9690\u60a3\uff0c\u5f00\u53d1\u4eba\u5458\u5fc5\u987b\u5728\u540e\u9762\u5f88\u5c0f\u5fc3\u5730\u53d8\u91cf\uff1b\u4e00\u65e6\u51fa\u73b0\u91cd\u540d\uff0c\u540e\u9762\u7684\u91cd\u540d\u53d8\u91cf\u5c06\u4f1a\u8986\u76d6\u524d\u9762\u91cd\u540d\u7684\u53d8\u91cf\u503c\uff0c\u5982\uff1a<\/p>\n

$myVariable = 4\n#.......\u7701\u7565\u5927\u91cf\u4ee3\u7801........\n$myVariable = 7<\/pre>\n
\u7b2c2\u4e2a\u53d8\u91cf\u8d4b\u503c\u6210\u529f\u540e\u5c06\u4f1a\u4e22\u5931\u7b2c\u4e00\u4e2a\u53d8\u91cf\u7684\u503c\uff0c\u5373\u53d1\u751f\u4e0d\u6613\u6355\u83b7\u7684bug\u3002<\/p>\n
\u5305\u62ecPowerShell\u5728\u5185\u7684\u73b0\u4ee3\u7f16\u7a0b\u8bed\u8a00\u901a\u8fc7\u5141\u8bb8\u6bcf\u4e2a\u903b\u8f91\u4ee3\u7801\u5757\u62e5\u6709\u81ea\u5df1\u4e0d\u540c\u7684\u53d8\u91cf\u7a7a\u95f4\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u5728\u4e00\u4e2a\u4ee3\u7801\u5757\u4e2d\u521d\u59cb\u5316\u5e76\u8d4b\u503c\u7ed9\u67d0\u4e2a\u53d8\u91cf\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u5355\u5143\u3002\u811a\u672c\u5757\u3001\u51fd\u6570\u548c\u811a\u672c\u6587\u4ef6\u4e5f\u662f\u8fd9\u6837\uff0c\u5373\u5728\u811a\u672c\u5757\u5185\u90e8\u8d4b\u503c\u7ed9\u53d8\u91cf\u4e0d\u4f1a\u8986\u76d6\u4ee3\u7801\u5757\u5916\u90e8\u76f8\u540c\u540d\u79f0\u7684\u53d8\u91cf\uff0c\u5982\uff1a<\/p>\n
$myVariable  = 6\n&{\n   $myVariable = 7\n}<\/pre>\n
\u4e0a\u4f8b\u4e2d\u811a\u672c\u5757\u4e2d\u7684\u53d8\u91cf$myVariable\u4fdd\u5b58\u7684\u503c7\u4e0d\u4f1a\u8986\u76d6\u811a\u672c\u5757\u5916\u7684\u540c\u540d\u53d8\u91cf\u3002<\/p>\n
\u4f5c\u7528\u57df\u672c\u8d28\u4e0a\u662f\u5206\u7b49\u7ea7\u7684\uff0c\u6bcf\u4e2a\u811a\u672c\u5757\u4f1a\u521b\u5efa\u65b0\u7684\u672c\u5730\u4f5c\u7528\u57df\u5e76\u58f0\u660e\u81ea\u5df1\u7684\u53d8\u91cf\u3002\u5b83\u4f1a\u7ee7\u627f\u5728\u7236\u4f5c\u7528\u57df\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u7236\u4f5c\u7528\u57df\u901a\u5e38\u662f\u5168\u5c40\u7684\u3002\u811a\u672c\u5757\u53ef\u4ee5\u8bbf\u95ee\u5728\u7236\u5b9a\u4e49\u57df\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u800c\u901a\u5e38\u8fd9\u6837\u7684\u8bbf\u95ee\u662f\u53ea\u8bfb\u7684\u3002\u811a\u672c\u5757\u53ef\u4ee5\u8bfb\u53d6\u5728\u5176\u4e4b\u524d\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u5982\u679c\u8981\u4fee\u6539\u53d8\u91cf\uff0c\u5219\u8981\u6267\u884c\u989d\u5916\u7684\u64cd\u4f5c\u3002\u4e0b\u4f8b\u6f14\u793a\u811a\u672c\u5757\u5982\u4f55\u4ece\u7236\u5b9a\u4e49\u57df\u8bfb\u53d6\u53d8\u91cf\u5e76\u8f93\u51fa\u5230\u63a7\u5236\u53f0\uff1a<\/p>\n
PS C:\\> $name =  "Liu Tao"\nPS C:\\> $personAction = {Write-Host "Hello $name"}\nPS C:\\> &$personAction\nHello Liu Tao<\/pre>\n
\u6539\u53d8$name\u53d8\u91cf\u503c\u5e76\u518d\u6b21\u8c03\u7528\u811a\u672c\u5757\u5c06\u4f1a\u5f97\u5230\u4e0d\u540c\u7684\u4fe1\u606f\uff1a<\/p>\n
PS C:\\> $name =  "Wang Lei"\nPS C:\\> $personAction = {Write-Host "Hello $name"}\nPS C:\\> &$personAction\nHello Wang Lei<\/pre>\n
\u5982\u679c\u5728\u811a\u672c\u5757\u5185\u90e8\u8d4b\u503c\u7ed9\u53d8\u91cf\uff0cPowerShell\u4f1a\u9996\u5148\u68c0\u67e5\u53d8\u91cf\u4e4b\u524d\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u662f\u5426\u5b9a\u4e49\u3002\u5982\u679c\u6ca1\u6709\u5b9a\u4e49\uff0c\u5219\u4f1a\u521b\u5efa\u65b0\u7684\u672c\u5730\u53d8\u91cf\u3002\u4e0b\u4f8b\u5728$personAction\u811a\u672c\u5757\u4e2d\u4e3a$name\u53d8\u91cf\u8d4b\u503c\uff1a<\/p>\n
PS C:\\> $personAction = {\n>> $name = "LiuTao"\n>> Write-Host "`$name changed to $name"\n>> }\n>>\nPS C:\\> $name = "WangLei"\nPS C:\\> &$personAction\n$name changed to LiuTao\nPS C:\\> $name\nWangLei<\/pre>\n
\u5728\u4e0a\u4f8b\u4e2d\u9700\u8981\u5f3a\u8c03\u811a\u672c\u5757\u4e2d\u4f7f\u7528\u4e86\u4fee\u6539\u540e\u7684\u53d8\u91cf\uff0c\u7528LiLei\u4f5c\u4e3a\u4eba\u540d\uff0c\u5e76\u4e14\u811a\u672c\u5757\u4e2d\u7684$name\u53d8\u91cf\u548c\u811a\u672c\u5757\u5916\u7684$name\u4e0d\u540c\u3002\u5373\u4e8c\u8005\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u53d8\u91cf\uff0c\u672c\u5730\u53d8\u91cf\u5c4f\u853d\u4e86\u5168\u5c40\u53d8\u91cf\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5168\u5c40\u7684$name\u53d8\u91cf\u4f1a\u5728\u811a\u672c\u5757\u6267\u884c\u540e\u4ecd\u7136\u4fdd\u6301\u539f\u6709\u7684\u503c\u7684\u539f\u56e0\u3002\u53ef\u4ee5\u5728\u811a\u672c\u5757\u4e2d\u4fee\u6539\u5168\u5c40\u53d8\u91cf\uff0c\u53ea\u662f\u64cd\u4f5c\u7a0d\u5fae\u590d\u6742\u4e00\u4e9b\u3002<\/p>\n
\u4e00\u65e6\u8ba4\u8bc6\u5230\u53d8\u91cf\u524d\u7684\u7f8e\u5143\u7b26\u8bed\u6cd5\u53ea\u662f\u540e\u53f0\u8c03\u7528Get-Variable\u548cSet-Variable\u7684\u4fbf\u6377\u901f\u8bb0\u540e\uff0c\u5373\u53ef\u6539\u53d8\u4efb\u4f55\u4f5c\u7528\u57df\u4e2d\u7684\u53d8\u91cf\u503c\u3002\u4f7f\u7528Get-Variable\u53ef\u4ee5\u83b7\u53d6\u53d8\u91cf\u7684PSVariable\u5bf9\u8c61\u5f15\u7528\uff0c\u4e0b\u4f8b\u4f7f\u7528\u5176\u83b7\u53d6$name\u53d8\u91cf\u7684\u4fe1\u606f\uff1a<\/p>\n
PS C:\\> Get-Variable name\n\nName                           Value\n----                           -----\nname                           WangLei<\/pre>\n
\u8981\u5f3a\u8c03\u7684\u662f\u65e2\u7136$\u53d8\u91cf\u540d\u7684\u5f62\u5f0f\u662fGet-Variable\u7684\u901f\u8bb0\uff0c\u90a3\u4e48\u5728\u4f7f\u7528Get-Variable\u67e5\u8be2\u53d8\u91cf\u4fe1\u606f\u65f6\u53d8\u91cf\u540d\u524d\u4e0d\u9700\u8981\u52a0$\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u53d8\u91cf\u540d\u53ea\u662f\u4f20\u9012\u7ed9Get-Variable\u7684\u53c2\u6570\uff0c\u5173\u952e\u662f\u53d8\u91cf\u503c\uff0c\u5982\u679c\u53ea\u83b7\u53d6\u53d8\u91cf\u503c\uff0c\u5219\u4f20\u9012-valueOnly\u53c2\u6570\u5373\u53ef\uff0c\u5982\uff1a<\/p>\n
PS C:\\> Get-Variable name -valueOnly\nWangLei<\/pre>\n
\u7c7b\u4f3c\u5730Set-Variable\u7528\u53d8\u91cf\u540d\u67e5\u627e\u53d8\u91cf\u5e76\u4fee\u6539\u5176\u503c\uff0c\u5982\uff1a<\/p>\n
PS C:\\> Set-Variable name "XiaoGang"\nPS C:\\> $name\nXiaoGang<\/pre>\n
\u4e0b\u4f8b\u4f7f\u7528Get-Variable\u548cSet-Variable\u91cd\u5199$PersonAction\uff1a<\/p>\n
PS C:\\> Set-Variable "name" "LiuTao"\nPS C:\\> Get-Variable "name" -valueOnly\nLiuTao\nPS C:\\> $personAction = {\n>> Set-Variable name "WangLei"\n>> Write-Host "`$name changed to $name"\n>> }\n>>\nPS C:\\> &$personAction\n$name changed to WangLei\nPS C:\\> Get-Variable "name" -ValueOnly\nLiuTao<\/pre>\n
Get-Variable\u548cSet-Variable\u8bed\u6cd5\u6bd4\u4e4b\u524d\u4f7f\u7528\u7684\u8d4b\u503c\u8bed\u6cd5\u7684\u529f\u80fd\u66f4\u52a0\u7684\u5f3a\u5927\uff0c\u4e8c\u8005\u5747\u652f\u6301-scope\u53c2\u6570\uff0c\u7528\u6765\u6307\u5b9a\u5c06\u4f1a\u5728\u54ea\u4e2a\u4f5c\u7528\u57df\u8303\u56f4\u5185\u641c\u7d22\u548c\u8bbe\u7f6e\u53d8\u91cf\u540d\u3002scope\u53c2\u6570\u503c\u4e3a0\u4ee3\u8868\u5f53\u524d\u4f5c\u7528\u57df\uff0c1\u4ee3\u8868\u7236\u4f5c\u7528\u57df\uff0c2\u4ee3\u8868\u7956\u7236\u4f5c\u7528\u57df\u7b49\u3002\u53ef\u4ee5\u7528\u8fd9\u4e9b\u53c2\u6570\u6765\u5728\u5f53\u524d\u811a\u672c\u5757\u4e2d\u4fee\u6539\u7236\u4f5c\u7528\u57df\u7684\u53d8\u91cf\u503c\uff0c\u4e0b\u4f8b\u91cd\u5199$personAction\uff1a<\/p>\n
PS C:\\> $name = "LiuTao"\nPS C:\\> $personAction = {\n>> Set-Variable name "WangLei" -scope 1\n>> Write-Host "`$name changed to $name"\n>> }\n>>\nPS C:\\> &$personAction\n$name changed to WangLei\nPS C:\\> $name\nWangLei<\/pre>\n
\u5728\u4e0a\u4f8b\u4e2d\u53ef\u4ee5\u770b\u5230\u6700\u540e\u4e00\u4e2a\u8bed\u53e5\u4e2d\u7236\u4f5c\u7528\u57df\u4e2d\u7684$name\u53d8\u91cf\u503c\u5728\u811a\u672c\u5757\u4e2d\u88ab\u6539\u53d8\u3002<\/p>\n
\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u7528\u6237\u5e76\u4e0d\u5173\u5fc3\u591a\u5c42\u5d4c\u5957\u7684\u4f5c\u7528\u57df\uff0c\u800c\u662f\u5bf9\u5f53\u524d\u4f5c\u7528\u57df\u548c\u5168\u5c40\u4f5c\u7528\u57df\u4e4b\u95f4\u7684\u533a\u522b\u611f\u5174\u8da3\uff0c\u8fd9\u6837\u53ef\u4ee5\u5728\u53d8\u91cf\u540d\u524d\u52a0\u524d\u7f00\u4ee5\u6807\u8bc6\u53d8\u91cf\u4f5c\u7528\u57df\u3002\u4ecd\u7136\u4ee5$personAction\u811a\u672c\u5757\u4e3a\u4f8b\uff0c\u53ef\u4ee5\u628a$name\u53d8\u91cf\u5b9a\u4e49\u4e3a\u5168\u5c40\u53d8\u91cf\uff0c\u5e76\u5728\u811a\u672c\u5757\u5185\u90e8\u4fee\u6539\u5176\u503c\uff1a<\/p>\n
PS C:\\> $global:name = "LiuTao"\nPS C:\\> $personAction = {\n>> $global:name = "WangLei"\n>> Write-Host "`$global:name changed to $global:name"\n>> }\n>>\nPS C:\\> &$personAction\n$global:name changed to WangLei\nPS C:\\> $global:name\nWangLei<\/pre>\n
\u5728\u524d\u9762\u7684\u4f8b\u5b50\u4e2d\u4e3aname\u53d8\u91cf\u51a0\u4ee5$global:\u524d\u7f00\u4f7f\u5176\u6210\u4e3a\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\u3002\u9700\u8981\u5f3a\u8c03\u7684\u662f\u8fd9\u91cc\u53ea\u662f\u5728global\u524d\u6dfb\u52a0\u4e86\u7f8e\u5143\u7b26\uff0c\u5e76\u6ca1\u6709\u5728\u5b9e\u9645\u53d8\u91cf\u540d\u524d\u518d\u6b21\u6dfb\u52a0\u7f8e\u5143\u7b26\u3002<\/p>\n
PowerShell\u652f\u6301\u5982\u4e0b4\u79cd\u4f5c\u7528\u57df\u524d\u7f00\u3002<\/p>\n
\uff081\uff09global\uff1a\u9002\u7528\u8303\u56f4\u6700\u5e7f\u7684\u4f5c\u7528\u57df\uff0c\u6240\u6709\u4ee3\u7801\u4e2d\u7684global\u53d8\u91cf\u90fd\u662f\u6709\u6548\u7684\u3002<\/p>\n
\uff082\uff09script\uff1a\u53d8\u91cf\u4ec5\u5728\u5f53\u524d\u811a\u672c\u6587\u4ef6\u4e2d\u53ef\u89c1\uff0c\u5728\u811a\u672c\u6587\u4ef6\u4ee5\u5916\u65e0\u6548\u3002<\/p>\n
\uff083\uff09local\uff1a\u9ed8\u8ba4\u4f5c\u7528\u57df\uff0c\u53d8\u91cf\u5728\u5f53\u524d\u548c\u5d4c\u5957\u7684\u4f5c\u7528\u57df\u4e2d\u53ef\u89c1\uff0c\u8d4b\u503c\u64cd\u4f5c\u8bed\u6cd5\u80fd\u5728\u5f53\u524d\u7684local\u4f5c\u7528\u57df\u4e2d\u4fee\u6539\u53d8\u91cf\u503c\u3002<\/p>\n
\uff084\uff09private\uff1a\u6700\u4e25\u683c\u7684\u4f5c\u7528\u57df\uff0c\u53d8\u91cf\u4ec5\u5728\u5f53\u524d\u4f5c\u7528\u57df\u6709\u6548\u3002\u6709\u4e86\u8fd9\u4e2a\u5173\u952e\u5b57\uff0c\u5c31\u53ef\u4ee5\u5728\u5b50\u811a\u672c\u5757\u4e2d\u9690\u85cf\u53d8\u91cf\u3002<\/p>\n
\u4e0b\u4f8b\u6f14\u793a\u5982\u4f55\u5728\u811a\u672c\u5757\u4e2d\u9690\u85cf\u53d8\u91cf\uff1a<\/p>\n
PS C:\\> $private:numberValue = 1\nPS C:\\> $checkNumberValue = {\n>> if ($numberValue -eq $null)\n>>  {\n>>    Write-Host "Cannot access to `$numberValue"\n>>  }\n>> }\n>>\nPS C:\\> &$checkNumberValue\nCannot access to $numberValue\nPS C:\\> $NumberValue\n1<\/pre>\n
\u5728\u4e0a\u4f8b\u4e2d\u53ea\u6709$numberValue\u4e3a$null\u65f6\u624d\u4f1a\u5728\u63a7\u5236\u53f0\u8f93\u51fa\u6587\u5b57\uff0c\u8fd9\u91cc\u8f93\u51fa\u4e86\u6587\u5b57\uff0c\u53ef\u89c1\u5728$checkNumberValue\u811a\u672c\u5757\u4e2d$numberValue\u65e0\u6548\u3002\u8fd9\u6837\u5c31\u5728\u5b50\u811a\u672c\u5757\u4e2d\u5c4f\u853d\u4e86\u7236\u4f5c\u7528\u57df\u7684\u53d8\u91cf\uff0c\u800c\u53d8\u91cf\u5728\u7236\u4f5c\u7528\u57df\u4ecd\u7136\u662f\u53ef\u89c1\u7684\u3002\u5373\u4f7f\u5c06\u53d8\u91cf\u58f0\u660e\u4e3aprivate\u4e5f\u65e0\u6cd5\u4eceGet-Variable\u548cSet-Variable\u4e2d\u9690\u85cf\u53d8\u91cf\u3002\u4e0b\u4f8b\u5f53\u4e2d\u4ecd\u4ee5$checkNumberValue\u811a\u672c\u5757\u4e3a\u4f8b\uff1a<\/p>\n
PS C:\\> $checkNumberValue = {\n>> if ((Get-Variable "numberValue" -valueOnly -scope 1) -ne $null)\n>>  {\n>>    Write-Host "Can access `$numberValue from parent scope"\n>>  }\n>> }\n>>\nPS C:\\> &$checkNumberValue\nCan access $numberValue from parent scope<\/pre>\n
\u5176\u4e2d\u5e76\u6ca1\u6709\u663e\u5f0f\u5730\u521d\u59cb\u5316\u53d8\u91cf$numberValue\u7684\u503c\u3002\u4ee5\u524d\u4e00\u4e2a\u5b9e\u4f8b\u4e2d\u5df2\u7ecf\u521d\u59cb\u5316\u4e86$numberValue\u503c\u3002\u5728\u89e3\u6790\u4e00\u4e2a\u6ca1\u6709\u4f5c\u7528\u57df\u524d\u7f00\u7684\u53d8\u91cf\u65f6\uff0cPowerShell\u4f1a\u5728private\u548clocal\u4e24\u4e2a\u4f5c\u7528\u57df\u4e2d\u67e5\u627e\uff0c\u63a5\u7740\u5728script\u548cglobal\u4e2d\u67e5\u627e\uff0c\u56e0\u6b64\u5728\u524d\u9762\u5728\u5b50\u811a\u672c\u5757\u4e2d\u8bfb\u53d6\u7236\u4f5c\u7528\u57df\u7684\u53d8\u91cf$numberValue\u4f1a\u8fd4\u56de\u771f\u503c\u3002\u5728\u6ca1\u6709\u6307\u5b9a\u524d\u7f00\u7684\u60c5\u51b5\u4e0b\uff0c\u4e3a\u540c\u540d\u53d8\u91cf\u8d4b\u65b0\u503c\u603b\u4f1a\u521b\u5efalocal\u4f5c\u7528\u57df\u7684\u53d8\u91cf\uff0c\u5982\uff1a<\/p>\n
PS C:\\> $global:name = "LiuTao"\nPS C:\\> $personAction = {\n>> Write-Host "`$name = $name"\n>> $name = "WangLei"\n>> Write-Host "`$name changed to $name"\n>> }\n>>\nPS C:\\> &$personAction\n$name = LiuTao\n$name changed to WangLei\nPS C:\\> $name\nLiuTao<\/pre>\n
\u5176\u4e2d\u811a\u672c\u5757\u8bfb\u53d6$name\u53d8\u91cf\u5e76\u83b7\u53d6\u5168\u5c40\u53d8\u91cf\uff0c\u5728\u540e\u9762\u4e3a\u53d8\u91cf\u8d4b\u503c\u521b\u5efa\u4e86local\u4f5c\u7528\u57df\u4e0b\u7684\u53d8\u91cf\uff0c\u5728\u6700\u540e\u80fd\u770b\u5230\u5168\u5c40\u53d8\u91cf\u7684\u503c\u6ca1\u6709\u53d8\u5316\u3002<\/p>\n
\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\uff0cPowerShell\u652f\u6301\u901a\u8fc7\u5728\u547d\u4ee4\u524d\u52a0\u70b9\u7684\u5f62\u5f0f\u6267\u884c\u547d\u4ee4\u7684\u7279\u6b8a\u8bed\u6cd5\uff0c\u8fd9\u79cd\u8bed\u6cd5\u79f0\u4e3a\u201cdot-sourcing\u201d\uff08\u63f4\u5f15\uff09\u3002\u63f4\u5f15\u811a\u672c\u5757\u4f7f\u811a\u672c\u5757\u4e2d\u7684\u53d8\u91cf\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u53ef\u7528\u3002\u4e0b\u4f8b\u4e2d\u4f1a\u5728\u811a\u672c\u5757\u4e2d\u58f0\u660e\u53d8\u91cf\uff1a<\/p>\n
PS C:\\> $numberBlock = {\n>> $numberInBlock = 1\n>> Write-Host $numberInBlock\n>> }\n>>\nPS C:\\> &$numberBlock\n1\nPS C:\\> $numberInBlock -eq $null\nTrue<\/pre>\n
\u5176\u4e2d\u53d8\u91cf$numberInBlock\u4ec5\u5728\u811a\u672c\u5757\u4e2d\u6709\u6548\u3002\u53ef\u4ee5\u901a\u8fc7\u9a8c\u8bc1\u811a\u672c\u5757\u4e2d\u53d8\u91cf\u7684\u6709\u6548\u6027\u9a8c\u8bc1\u63f4\u5f15\u811a\u672c\u5757\u7684\u529f\u80fd\u3002\u4e0b\u4f8b\u4e2d\u9996\u5148\u63f4\u5f15\u811a\u672c\u5757\uff1a<\/p>\n
PS C:\\> .$numberBlock\n1\nPS C:\\> $numberInBlock\n1<\/pre>\n
\u53ef\u4ee5\u770b\u5230\u7684\u5728\u5bf9\u811a\u672c\u5757\u6267\u884cdot-sourcing\u64cd\u4f5c\u4e4b\u540e\uff0c\u811a\u672c\u5757\u4e2d\u7684\u53d8\u91cf\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u6709\u6548\u3002dot-sourcing\u7684\u4f5c\u7528\u53ef\u4ee5\u770b\u505a\u662f\u5c06\u811a\u672c\u5757\u4e2d\u7684\u73af\u5883\u91ca\u653e\u5230\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\uff0c\u5e76\u6267\u884c\u811a\u672c\u5757\u4e2d\u7684\u4ee3\u7801\u3002\u5728\u524d\u9762\u7684\u4f8b\u5b50\u4e2d$numberInBlock\u53d8\u91cf\u53ef\u7528\uff0c\u56e0\u4e3a$numberBlock\u811a\u672c\u5757\u7684\u5185\u5bb9\u5df2\u7ecf\u91ca\u653e\u5e76\u6267\u884c\u3002\u9700\u8981\u5f3a\u8c03\u7684\u662f\u901a\u8fc7\u63f4\u5f15\u64cd\u4f5c\u6267\u884c\u811a\u672c\u5757\u4e0d\u518d\u9700\u8981\u5728\u811a\u672c\u5757\u540d\u524d\u6dfb\u52a0&\u7b26\u53f7\u8c03\u7528\u3002\u901a\u8fc7\u6bd4\u8f83\u53ef\u4ee5\u770b\u51fa\u8c03\u7528\u811a\u672c\u5757\uff08\u4f7f\u7528&\uff09\u548c\u63f4\u5f15\u811a\u672c\u5757\u7684\u533a\u522b\u53ea\u662f\u6267\u884c\u811a\u672c\u5757\uff0c\u5e76\u4e0d\u5c06\u811a\u672c\u5757\u7684\u53d8\u91cf\u73af\u5883\u91ca\u653e\u5230\u5f53\u524d\u4f5c\u7528\u57df\u3002<\/p>\n
\u5728\u8c03\u7528\u7ba1\u9053\u4ee5\u540e\uff0c\u5728\u540c\u4e00\u4e2a\u7ba1\u9053\u4e2d\u7684\u811a\u672c\u5757\u5171\u4eab\u76f8\u540c\u7684\u4f5c\u7528\u57df\u3002\u4e0b\u4f8b\u5305\u542b\u4e24\u4e2a\u811a\u672c\u5757\u7684\u7ba1\u9053\u4f20\u9012\u7ed9\u5e94\u7528\u53e6\u4e00\u4e2a\u7ba1\u9053\u7684cmdlet\uff0c\u7b2c1\u4e2a\u811a\u672c\u5757\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u4f1a\u5728\u7b2c2\u4e2a\u811a\u672c\u5757\u4e2d\u6709\u6548\uff1a<\/p>\n
PS C:\\> dir *.txt | foreach {$file = $_.Name; return 3}|\n>> foreach {"got $file"}\n>>\ngot digit.txt\ngot largetext.txt\ngot smalltext.txt\ngot test.txt\ngot test2.txt<\/pre>\n
\u9700\u8981\u5f3a\u8c03\u7684\u662f\u7b2c1\u4e2aforeach\u5757\u8bbe\u7f6e\u4e86$file\u53d8\u91cf\u5e76\u8fd4\u56de\u4e86\u54d1\u5143\u6570\uff0c$file\u53d8\u91cf\u5728\u7b2c2\u4e2aforeach\u5757\u4e2d\u4ecd\u7136\u53ef\u7528\u3002<\/p>\n
\u603b\u7ed3<\/b><\/p>\n
\u53d8\u91cf\u4f5c\u7528\u57df\u80fd\u591f\u6709\u6548\u5730\u63a7\u5236\u53d8\u91cf\u7684\u751f\u5b58\u5468\u671f\uff0c\u5408\u7406\u7684\u8bbe\u8ba1\u7a0b\u5e8f\u4e2d\u53d8\u91cf\u4f5c\u7528\u57df\u7684\u8303\u56f4\u53ef\u4ee5\u5f88\u597d\u7684\u7b80\u5316\u7a0b\u5e8f\u7684\u590d\u6742\u5ea6\uff0c\u5c3d\u53ef\u80fd\u907f\u514d\u7a0b\u5e8f\u4e2d\u53d8\u91cf\u540d\u6c61\u67d3\u7684\u95ee\u9898\uff0c\u4f7fPowerShell\u5f3a\u5927\u7684\u53d8\u91cf\u5904\u7406\u80fd\u529b\u5f97\u5230\u5f88\u597d\u7684\u5e94\u7528\u3002\u7a0b\u5e8f\u4e2d\u7684\u53d8\u91cf\u4f5c\u7528\u57df\u9700\u8981\u638c\u63e1\u7684\u539f\u5219\u662f\u5728\u80fd\u591f\u4f20\u9012\u6570\u636e\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u91cf\u51cf\u5c0f\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u8303\u56f4\uff0c\u8fd9\u6837\u65e2\u80fd\u4fdd\u62a4\u6570\u636e\u4e0d\u88ab\u5916\u754c\u6076\u610f\u8c03\u7528\uff0c\u4e5f\u4e0d\u4f1a\u9020\u6210\u540c\u540d\u53d8\u91cf\u5728\u4e0d\u540c\u4f5c\u7528\u57df\u4e0b\u4ea7\u751f\u51b2\u7a81\u3002<\/p>\n
\u8d5b\u8fea\u7f51\u5730\u5740\uff1ahttp:\/\/news.ccidnet.com\/art\/32855\/20100612\/2086063_1.html<\/a><\/p>\n
\u4f5c\u8005: \u4ed8\u6d77\u519b
\n  
\u7248\u6743\uff1a\u672c\u6587\u7248\u6743\u5f52\u4f5c\u8005\u6240\u6709<\/p>\n
\u8f6c\u8f7d\uff1a\u6b22\u8fce\u8f6c\u8f7d\uff0c\u4e3a\u4e86\u4fdd\u5b58\u4f5c\u8005\u7684\u521b\u4f5c\u70ed\u60c5\uff0c\u8bf7\u6309\u8981\u6c42\u3010\u8f6c\u8f7d\u3011\uff0c\u8c22\u8c22<\/p>\n
\u8981\u6c42\uff1a\u672a\u7ecf\u4f5c\u8005\u540c\u610f\uff0c\u5fc5\u987b\u4fdd\u7559\u6b64\u6bb5\u58f0\u660e\uff1b\u5fc5\u987b\u5728\u6587\u7ae0\u4e2d\u7ed9\u51fa\u539f\u6587\u8fde\u63a5\uff1b\u5426\u5219\u5fc5\u7a76\u6cd5\u5f8b\u8d23\u4efb <\/p>\n
\u4e2a\u4eba\u7f51\u7ad9: http:\/\/txj.shell.tor.hu\/<\/p>\n","protected":false},"excerpt":{"rendered":"
\u53d8\u91cf\u4f5c\u7528\u57df\u7528\u6765\u5b9a\u4e49\u7a0b\u5e8f\u4e2d\u54ea\u4e9b\u90e8\u5206\u53ef\u4ee5\u4f7f\u7528\u67d0\u4e2a\u53d8\u91cf\u3002PowerShell\u4e2d\u5bf9\u8c61\u7684\u4f5c\u7528\u57df\u89c4\u5219\u8bbe\u8ba1\u5f97\u5f88\u5de7\u5999\uff0c\u7c7b\u4f3c\u53d8\u91cf […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[],"class_list":["post-33111","post","type-post","status-publish","format-standard","hentry","category-powershell"],"_links":{"self":[{"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts\/33111"}],"collection":[{"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=33111"}],"version-history":[{"count":1,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts\/33111\/revisions"}],"predecessor-version":[{"id":33805,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts\/33111\/revisions\/33805"}],"wp:attachment":[{"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}