\u4e24\u4e2a\u8bed\u53e5\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u82b1\u62ec\u53f7\uff0c\u5b83\u4f7f\u811a\u672c\u5757\u4e2d\u7684Write-Host\u8bed\u53e5\u6ca1\u6709\u88ab\u6267\u884c\uff0c\u5f97\u5230\u7684\u662f\u8fd9\u4e9b\u5b57\u7b26\u4e32\u7ec4\u6210\u7684\u811a\u672c\u5757\u5bf9\u8c61\u3002\u5982\u679c\u4e0d\u4e3a\u5176\u4fdd\u5b58\u4e00\u4e2a\u5f15\u7528\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u8bed\u53e5\u6ca1\u6709\u610f\u4e49\u3002\u4e0b\u4f8b\u5c06\u4e00\u4e2a\u5efa\u7acb\u7684\u811a\u672c\u5757\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cf:<\/p>\n
PS C:\\> $HelloWorldBlock={Write-Host "Hello World from a Script Block"}\nPS C:\\><\/pre>\n\u67e5\u770b\u811a\u672c\u5757\u53d8\u91cf\u7684\u7c7b\u578b\uff1a<\/p>\n
PS C:\\> $HelloWorldBlock.GetType().FullName\nSystem.Management.Automation.ScriptBlock<\/pre>\n\u53ef\u4ee5\u770b\u5230\u7684\u811a\u672c\u5757\u5bf9\u8c61\u662fSystem.Manage.Automation\u7684\u5b9e\u4f8b\u3002\u4f5c\u4e3a\u6807\u51c6\u7684.NET\u7c7b\uff0c\u811a\u672c\u5757\u4e5f\u662fPowerShell\u57fa\u7840\u7ed3\u6784\uff0c\u56e0\u6b64\u53ef\u4ee5\u5982\u540c.NET\u5bf9\u8c61\u90a3\u6837\u6765\u5904\u7406\u5b83\u3002\u4e0b\u4f8b\u83b7\u53d6\u811a\u672c\u5757\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff1a<\/p>\n
PS C:\\> $HelloWorldBlock | Get-Member\n\n TypeName: System.Management.Automation.ScriptBlock\n\nName MemberType Definition\n---- ---------- ----------\nEquals Method System.Boolean Equals(Object obj)\nGetHashCode Method System.Int32 GetHashCode()\nGetNewClosure Method System.Management.Automation.\nScriptBlock GetNewClosure()\nGetPowerShell Method System.Management.Automation.\nPowerShell GetPowerShell(Params Object[] args)\nGetSteppablePipeline Method System.Management.Automation.\nSteppablePipeline GetSteppablePipeline()\nGetType Method System.Type GetType()\nInvoke Method System.Collections.ObjectModel.\nCollection`1[[System.Management.Automation.PSObject, ...\nInvokeReturnAsIs Method System.\nObject InvokeReturnAsIs(Params Object[] args)\nToString Method System.String ToString()\nFile Property System.String File {get;}\nIsFilter Property System.\nBoolean IsFilter {get;set;}\nModule Property System.Management.Automation.\nPSModuleInfo Module {get;}\nStartPosition Property System.Management.Automation.\nPSToken StartPosition {get;}<\/pre>\n\u53ef\u4ee5\u901a\u8fc7\u4e0a\u9762\u7684\u5c5e\u6027\u6e05\u5355\u4e86\u89e3PowerShell\u4f7f\u7528\u811a\u672c\u5757\u7684\u65b9\u6cd5\u3002\u5728\u6267\u884c\u65f6PowerShell\u4f1a\u89e3\u6790\u811a\u672c\u4ee3\u7801\u521b\u5efa\u811a\u672c\u5757\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u5bf9\u8c61\u7684Invoke\u548cInvokeReturnAsIs\u65b9\u6cd5\u3002<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u5728\u811a\u672c\u5757\u540d\u524d\u7f00\u4e4b\u524d\u6dfb\u52a0\u5f15\u7528\u64cd\u4f5c\u7b26\uff08&\uff09\u5f15\u7528\u811a\u672c\u5757\uff0c\u4e0b\u4f8b\u901a\u8fc7\u811a\u672c\u5757\u53d8\u91cf\u6765\u8c03\u7528\u811a\u672c\uff1a<\/p>\n
PS C:\\> $HelloWorldBlock={Write-Host "Hello World from a Script Block"}\nPS C:\\> &$HelloWorldBlock\nHello World from a Script Block<\/pre>\n\u5f15\u7528\u64cd\u4f5c\u7b26\u4e0d\u4ec5\u53ef\u4ee5\u548c\u53d8\u91cf\u914d\u5408\u4f7f\u7528\uff0c\u4e5f\u662f\u4e00\u4e2a\u8868\u8fbe\u5f0f\u64cd\u4f5c\u7b26\uff0c\u53ef\u4ee5\u5728\u811a\u672c\u5757\u5b9a\u4e49\u65f6\u4f7f\u7528\u3002\u5982\u4e0b\u9762\u58f0\u660e\u5b9a\u4e49\u4e00\u4e2a\u533f\u540d\u811a\u672c\u5757\u5e76\u4e14\u6267\u884c\uff1a<\/p>\n
PS C:\\> &{Write-Host "Hello World from a Anonymous Script Block"}\nHello World from a Anonymous Script Block<\/pre>\n\u811a\u672c\u5757\u662f\u7f16\u8bd1\u540e\u7684\u53ef\u4ee5\u88ab\u4f20\u9012\u548c\u591a\u6b21\u6267\u884c\u7684\u5bf9\u8c61\uff0c\u53ef\u4ee5\u6307\u5b9a\u53d8\u91cf\u6307\u5411\u5185\u5b58\u4e2d\u7684\u811a\u672c\u5757\u3002\u4e0b\u4f8b\u8bf4\u660e\u5982\u4f55\u591a\u6b21\u6267\u884c\u811a\u672c\u5757\uff0c\u5e76\u901a\u8fc7\u4e0d\u540c\u7684\u53d8\u91cf\u6765\u8bbf\u95ee\u5b83\uff1a<\/p>\n
PS C:\\> $Block1={Write-Host "Block executed"}\nPS C:\\> $Block2=$Block1\nPS C:\\> for($i=0;$i-lt 3;$i++)\n>> {&$Block1\n>> &$Block2\n>> }\n>>\nBlock executed\nBlock executed\nBlock executed\nBlock executed\nBlock executed\nBlock executed<\/pre>\n\u80fd\u591f\u770b\u52306\u6761\u811a\u672c\u5757\u6267\u884c\u7684\u63d0\u793a\u4fe1\u606f\uff0c\u5faa\u73af\u4f53\u88ab\u6267\u884c\u4e863\u6b21\uff0c\u6bcf\u6b21\u90fd\u6267\u884c\u4e86\u53d8\u91cf$Block1\u548c$Block2\u6307\u5411\u7684\u811a\u672c\u5757\u3002\u4e24\u4e2a\u53d8\u91cf\u662f\u6307\u5411\u540c\u4e00\u4e2a\u811a\u672c\u5757\u5bf9\u8c61\uff0c\u6240\u4ee5\u811a\u672c\u5757\u6267\u884c\u4e866\u904d\u3002<\/p>\n
\u8fd4\u56de\u503c\u548c\u53c2\u6570<\/b><\/p>\n
\u4ece\u811a\u672c\u5757\u4e2d\u7ed9\u51fa\u8fd4\u56de\u503c\u9700\u8981\u8f93\u51fa\u5305\u542b\u4e0d\u88abcmdlet\u548c\u5176\u4ed6\u8868\u8fbe\u5f0f\u63a5\u6536\u7684\u5bf9\u8c61\uff0c\u4e0b\u4f8b\u662f\u8fd4\u56de\u6570\u5b57\u7684\u811a\u672c\u5757\uff1a<\/p>\n
PS C:\\> $number = {5}\nPS C:\\> &$number \n5\nPS C:\\> 1+ (&$number)\n6<\/pre>\n\u53ef\u4ee5\u4ece\u4e0a\u4f8b\u4e2d\u770b\u5230\u6700\u540e\u4e00\u4e2a\u547d\u4ee4\uff0c\u8fd4\u56de\u503c\u53ef\u4ee5\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u7528\u4e8e\u5176\u4ed6\u8868\u8fbe\u5f0f\uff0c\u4e3a\u6b64\u9700\u8981\u4f7f\u7528\u5706\u62ec\u53f7\u62ec\u8d77\u8fd4\u56de\u503c\u5305\u542b\u3002\u5728\u4f7f\u7528\u5b8f\u7684\u8868\u8fbe\u5f0f\u4e2d\u9700\u8981\u6ce8\u610f\u62ec\u53f7\u7684\u4f7f\u7528\uff0c\u4e0d\u7136\u53ef\u80fd\u4f1a\u56e0\u4e3a\u6784\u9020\u7684\u8868\u8fbe\u5f0f\u6709\u8bef\u800c\u9020\u6210\u9519\u8bef\u3002\u5728\u4e0a\u4f8b\u4e2d\u5982\u679c\u6ca1\u6709\u62ec\u53f7\uff0c\u52a0\u53f7\u4f1a\u628a&\u4f5c\u4e3a\u5176\u4ed6\u53f3\u4fa7\u7684\u64cd\u4f5c\u6570\uff0c\u800c\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n
PS C:\\> 1 + &$number\nYou must provide a value expression on the right-hand side of the '+' operator.\nAt line:1 char:4\n+ 1 + <<<< &$number\n + CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException\n + FullyQualifiedErrorId : ExpectedValueExpression<\/pre>\n\u9700\u8981\u6ce8\u610f\u7684\u662f\u8f93\u51fa\u5bf9\u8c61\u4e0d\u4f1a\u7ec8\u6b62\u811a\u672c\u5757\u4e2d\u540e\u7eed\u8bed\u53e5\u7684\u64cd\u4f5c\uff0c\u4f59\u4e0b\u7684\u8bed\u53e5\u5c06\u4f1a\u7ee7\u7eed\u6267\u884c\u3002\u5982\u5728\u8fd4\u56de\u6570\u503c\u540e\u5728\u63a7\u5236\u53f0\u7a97\u53e3\u4e2d\u8f93\u51fa\u4e00\u4e2a\u5b57\u7b26\u4e32\uff1a<\/p>\n
PS C:\\> $numberPrint = {5;Write-Host "generated a number" }\nPS C:\\> &$numberPrint\n5\ngenerated a number\nPS C:\\> $result = &$numberPrint\ngenerated a number\nPS C:\\> $result\n5<\/pre>\n$numberPrint\u8bed\u53e5\u5757\u8fd4\u56de\u503c\u5e76\u5411\u63a7\u5236\u53f0\u6253\u5370\u5b57\u7b26\u4e32\uff0c\u533f\u540d\u8bed\u53e5\u5757\u8868\u9762\u4e0a\u770b\u8d77\u6765\u540c\u65f6\u8f93\u51fa\u4e86\u8d4b\u503c\u76845\uff0c\u8fd8\u6709\u5b57\u7b26\u4e32\u3002\u4f46\u662f\u5b9e\u9645\u7684\u8fd4\u56de\u503c\u53ea\u662f5\uff0c\u6253\u5370\u5230\u63a7\u5236\u53f0\u7684\u5b57\u7b26\u4e32\u662f\u5728\u8d4b\u503c\u65f6\u4ea7\u751f\u7684\u4f34\u751f\u54c1\u3002\u5982\u679c\u5c06$numberPrint\u8c03\u7528\u8d4b\u503c\u7ed9\u5176\u4ed6\u53d8\u91cf\uff0c\u8fd9\u4e2a\u53d8\u91cf\u5c31\u62e5\u6709\u4e86$numberPrint\u7684\u8fd4\u56de\u503c\uff0c\u5728\u8d4b\u503c\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u770b\u5230\u5df2\u7ecf\u6253\u5370\u5b57\u7b26\u4e32\uff0c\u5728\u8d4b\u503c\u540e\u4f7f\u7528$result\u6253\u5370\u7684\u624d\u662f\u5b9e\u9645\u7684\u8fd4\u56de\u503c\u3002<\/p>\n
\u4e3a\u4e86\u7ed3\u675f\u6267\u884c\u5e76\u7ec8\u6b62\u811a\u672c\u5757\uff0c\u53ef\u4ee5\u4f7f\u7528return\u8bed\u53e5\uff0c\u5b83\u5c06\u7ec8\u6b62\u6267\u884c\u5e76\u8fd4\u56de\u503c\u3002\u4e0b\u4f8b\u4e2d\u4f7f\u7528return\u8bed\u53e5\u7ec8\u6b62Write-Host\u547d\u4ee4\u7684\u8f93\u51fa\uff1a<\/p>\n
PS C:\\> $numberPrint = {return 5;Write-Host "generated a number" }\nPS C:\\> $a = &$number\nPS C:\\> $a\n5<\/pre>\n\u8fd9\u6837\u53ef\u4ee5\u4f7f\u7528return\u8bed\u53e5\u76f4\u63a5\u9000\u51fa\u811a\u672c\u5757\u5e76\u7ec8\u6b62\u6267\u884c\uff0c\u8be5\u8bed\u53e5\u5e76\u4e0d\u4e25\u683c\u8981\u6c42\u7528\u6237\u63d0\u4f9b\u8fd4\u56de\u503c\u3002\u5982\u679c\u7701\u7565\uff0c\u811a\u672c\u5757\u5c06\u5728\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u7684\u60c5\u51b5\u4e0b\u9000\u51fa\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u811a\u672c\u5757\u5c06\u4f1a\u7ed9\u8c03\u7528\u8005\u8fd4\u56dereturn\u8bed\u53e5\u4e4b\u524d\u7684\u8f93\u51fa\u5185\u5bb9\uff0c\u5982\u4e0b\u4f8b\u6240\u793a\uff1a<\/p>\n
PS C:\\> $noReturn = {return; 4}\nPS C:\\> &$noReturn\nPS C:\\> $numberReturn = {4;return}\nPS C:\\> &$numberReturn\n4\nPS C:\\> $writeStringReturn = {Write-Host "output string";return}\nPS C:\\> &$writeStringReturn\noutput string\nPS C:\\> $b = &$writeStringReturn\noutput string\nPS C:\\> $b\nPS C:\\> $stringReturn = {"output string";return}\nPS C:\\> &$stringReturn\noutput string\nPS C:\\> $b = &$stringReturn\nPS C:\\> $b\noutput string<\/pre>\n\u8c03\u7528$noReturn\u8bed\u53e5\u5757\u80fd\u770b\u51fareturn\u8bed\u53e5\u4f7f\u540e\u9762\u76844\u672a\u8d77\u4f5c\u7528\uff1b\u8c03\u7528$numberReturn\u8bed\u53e5\u5757\u53ef\u4ee5\u770b\u51fareturn\u8bed\u53e5\u5728\u6ca1\u6709\u8fd4\u56de\u503c\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u524d\u9762\u7684\u8f93\u51fa4\u6210\u4e3a\u8fd4\u56de\u503c\u3002$writeStringReturn\u8bed\u53e5\u5757\u9a8c\u8bc1\u4e86return\u8bed\u53e5\u524d\u7684Write-Host\u8f93\u51fa\u7684\u5b57\u7b26\u4e32\u5e76\u4e0d\u4f1a\u4f5c\u4e3a\u8bed\u53e5\u5757\u7684\u8fd4\u56de\u503c\uff0cWrite-Host\u7684\u4f5c\u7528\u53ea\u662f\u5411\u63a7\u5236\u53f0\u8f93\u51fa\u8981\u6253\u5370\u7684\u5185\u5bb9\uff0c\u5e76\u4e0d\u4f1a\u4ee5\u8d4b\u503c\u7684\u5f62\u5f0f\u4f20\u9012\u7ed9\u5176\u4ed6\u53d8\u91cf\u3002\u5bf9\u6bd4$stringReturn\u8bed\u53e5\u5757\u8c03\u7528\u548c\u4e0a\u9762\u7684$writeStringReturn\u8bed\u53e5\u5757\uff0c\u53ef\u4ee5\u770b\u51fareturn\u8bed\u53e5\u662f\u5c06\u524d\u9762\u7684\u5b57\u7b26\u4e32\u4f5c\u4e3a\u8fd4\u56de\u503c\u8f93\u51fa\u3002<\/p>\n
\u4e0a\u4f8b\u4e2d\u7684return\u8bed\u53e5\u524d\u9762\u53ea\u6709\u4e00\u4e2a\u8bed\u53e5\uff0c\u4e8b\u5b9e\u4e0aPowerShell\u4e2d\u53ef\u4ee5\u6709\u591a\u4e2a\u8bed\u53e5\u4f5c\u4e3a\u8fd4\u56de\u503c\uff0c\u8fd9\u662f\u548c\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e0d\u540c\u4e4b\u4e00\u3002PowerShell\u7684\u8fd4\u56de\u503c\u53ef\u4ee5\u662f\u591a\u4e2a\u503c\uff0c\u5982\u679c\u5728\u5faa\u73af\u4e2d\u591a\u6b21\u6267\u884c\uff0c\u7ed3\u679c\u4f1a\u662f\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\uff0c\u4e0b\u9762\u662f\u5355\u4e2a\u811a\u672c\u5757\u8fd4\u56de\u591a\u4e2a\u6570\u5b57\u7ec4\u6210\u7684\u6570\u7ec4\u5b9e\u4f8b\uff1a<\/p>\n
PS C:\\> $numbers = {1;2;3;}\nPS C:\\> &$numbers\n1\n2\n3\nPS C:\\> (&$numbers).GetType().FullName\nSystem.Object[]<\/pre>\n\u9700\u8981\u5f3a\u8c03\u7684\u662f\u53ef\u4ee5\u4e0d\u663e\u5f0f\u5730\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\uff0c\u4e3a\u6b64\u4f7f\u7528\u9017\u53f7\u4f5c\u4e3a\u6570\u5b57\u5206\u9694\u7b26\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u5206\u53f7\u3002\u5206\u53f7\u662f\u4f5c\u4e3a\u8bed\u53e5\u7684\u7ec8\u7ed3\u7b26\uff0c\u7ed3\u679c\u4e3a3\u4e2a\u6570\u5b57\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/p>\n
\u5982\u679c\u811a\u672c\u5757\u80fd\u591f\u5bf9\u5916\u90e8\u6709\u6548\uff0c\u5219\u5176\u9700\u8981\u80fd\u591f\u4ece\u5916\u90e8\u83b7\u53d6\u53c2\u6570\uff0c\u53c2\u6570\u57fa\u4e8e\u5176\u4f20\u9012\u5e76\u89e3\u6790\u7684\u987a\u5e8f\u548c\u4f4d\u7f6e\u3002\u811a\u672c\u5757\u62e5\u6709\u88ab\u79f0\u4e3a\u201c$args\u201d\u7684\u9884\u5b9a\u4e49\u53d8\u91cf\u5b58\u5728\uff0c\u8fd9\u4e2a\u53d8\u91cf\u7531PowerShell\u7684\u5916\u58f3\u81ea\u52a8\u5b9a\u4e49\uff0c\u7528\u6765\u63a5\u6536\u7528\u6237\u4f20\u9012\u5230\u811a\u672c\u5757\u7684\u53c2\u6570\u7684\u96c6\u5408\u3002\u4e0b\u4f8b\u6f14\u793a$args\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n
PS C:\\> $greeter = {\n>> $firstName = $args[0]\n>> $lastName = $args[1]\n>> Write-Host "Hello,$firstName $lastName Welcome to the world of PowerShell"\n>> }\n>>\nPS C:\\> &$greeter\nHello, Welcome to the world of PowerShell\nPS C:\\> &$greeter "Jim" "Green"\nHello,Jim Green Welcome to the world of PowerShell\nPS C:\\> &$greeter "Liu" "Tao"\nHello,Liu Tao Welcome to the world of PowerShell<\/pre>\n\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u53c2\u6570\u662f\u4e2a\u4e0d\u9519\u7684\u529f\u80fd\uff0c\u5f88\u591a\u8bed\u8a00\u4e2d\u5747\u63d0\u4f9b\u8be5\u529f\u80fd\u3002\u5b83\u9002\u5408\u5728\u5f88\u7b80\u5355\u7684\u5e94\u7528\u73af\u5883\u4e0b\u4f7f\u7528\u3002\u4e5f\u53ef\u7528\u5728\u5b9a\u4e49\u811a\u672c\u5757\u65f6\uff0c\u5e76\u4e0d\u6e05\u695a\u53c2\u6570\u6570\u76ee\u7684\u5e94\u7528\u573a\u666f\u4e0b\u3002\u4f46\u5982\u679c\u4f20\u9012\u7684\u53c2\u6570\u6bd4\u8f83\u591a\uff0c\u8fd9\u4e2a\u529f\u80fd\u4f1a\u4f7f\u5f97\u4ee3\u7801\u5757\u6709\u66f4\u591a\u51fa\u9519\u7684\u53ef\u80fd\u6027\u3002\u5728\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u53ef\u4ee5\u5728\u811a\u672c\u5757\u5185\u90e8\u4f7f\u7528param\u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\uff0c\u6765\u4f7f\u7528\u547d\u540d\u53c2\u6570\u3002\u4e0b\u4f8b\u662f\u524d\u4e00\u4e2a\u4f8b\u5b50\u7528\u547d\u540d\u53c2\u6570\u91cd\u5199\u540e\u7684\u5f62\u5f0f\uff1a<\/p>\n
PS C:\\> $greeter = {\n>> param ($firstName,$lastName)\n>> Write-Host "Hello,$firstName $lastName Welcome to the world of PowerShell"\n>> }\n>>\nPS C:\\> &$greeter "Liu" "Tao"\nHello,Liu Tao Welcome to the world of PowerShell<\/pre>\n\u8fd9\u6837\u7684\u5199\u6cd5\u66f4\u4e3a\u6e05\u6670\uff0c\u4f46\u8fd8\u662f\u6709\u4e9b\u4e0d\u65b9\u4fbf\uff0c\u56e0\u4e3a\u662f\u9700\u8981\u8bb0\u5fc6\u53c2\u6570\u7684\u987a\u5e8f\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528\u53c2\u6570\u540d\u5f00\u5173\u6765\u5173\u8054\u53c2\u6570\u540d\u548c\u53c2\u6570\u503c\uff0c\u5982\uff1a<\/p>\n
PS C:\\> &$greeter "Liu" "Tao"\nHello,Liu Tao Welcome to the world of PowerShell\nPS C:\\> &$greeter -firstName "Liu" -lastName "Tao"\nHello,Liu Tao Welcome to the world of PowerShell\nPS C:\\> &$greeter -lastName "Tao" -firstName "Liu"\nHello,Liu Tao Welcome to the world of PowerShell<\/pre>\n\u5982\u679c\u5b9a\u4e49\u7684\u53c2\u6570\u540d\u5f88\u957f\uff0c\u8fd9\u6837\u7684\u65b9\u6cd5\u4e5f\u4e0d\u592a\u65b9\u4fbf\u3002\u4e3a\u6b64\uff0c\u53ef\u4ee5\u7f29\u5199\u53c2\u6570\u540d\uff0cPowerShell\u5916\u58f3\u5c06\u4f1a\u81ea\u52a8\u8bc6\u522b\u8fd9\u4e9b\u53c2\u6570\uff0c\u5982\uff1a<\/p>\n
PS C:\\> &$greeter -last "Tao" -first "Liu"\nHello,Liu Tao Welcome to the world of PowerShell\nPS C:\\> &$greeter -l "Tao" -f "Liu"\nHello,Liu Tao Welcome to the world of PowerShell<\/pre>\n\u9700\u8981\u5f3a\u8c03\u7684\u662f\u8fd9\u79cd\u7701\u7565\u81f3\u5c11\u9700\u8981\u53c2\u6570\u540d\u7684\u9996\u5b57\u6bcd\u5c31\u80fd\u591f\u6ee1\u8db3\u8981\u6c42\u3002\u5982\u679c\u53c2\u6570\u540d\u5f00\u5934\u7684\u51e0\u4e2a\u5b57\u6bcd\u76f8\u540c\uff0c\u5219\u9700\u8981\u63d0\u4f9b\u8db3\u591f\u591a\u7684\u53c2\u6570\u540d\u5b57\u6bcd\uff0c\u76f4\u5230\u80fd\u8ba9PowerShell\u7684\u5916\u58f3\u533a\u5206\u4f53\u63d0\u4f9b\u7684\u662f\u54ea\u4e2a\u53c2\u6570\u3002<\/p>\n
\u53ef\u4ee5\u4f7f\u7528param\u8bed\u53e5\u5f3a\u5236\u5c06\u53c2\u6570\u8f6c\u6362\u4e3a\u9700\u8981\u7684\u7c7b\u578b\u3002\u5982\u679c\u811a\u672c\u5757\u8c03\u7528\u8005\u63d0\u4f9b\u4e86\u53ef\u4ee5\u8f6c\u6362\u5230\u76ee\u6807\u7c7b\u578b\u7684\u53c2\u6570\uff0cPowerShell\u5916\u58f3\u5c06\u4f1a\u81ea\u52a8\u8f6c\u6362\u3002\u4e0e\u6b64\u540c\u65f6\uff0c\u8fd8\u53ef\u4ee5\u5728\u4ee3\u7801\u5757\u4e2d\u663e\u5f0f\u6307\u660e\u5f53\u53c2\u6570\u7c7b\u578b\u8f6c\u6362\u5931\u8d25\u65f6\u629b\u51fa\u9519\u8bef\u3002\u8fd9\u4e2a\u7279\u6027\u53ef\u4ee5\u770b\u505a\u662f\u7b80\u5355\u7684\u9519\u8bef\u5904\u7406\u3002\u4e0b\u4f8b\u5728\u4e24\u4e2a\u6570\u76f8\u52a0\u65f6\u4f7f\u7528\u53c2\u6570\u7c7b\u578b\u5b9a\u4e49\u8f6c\u6362\u503c\u7c7b\u578b\uff1a<\/p>\n
PS C:\\> $sum = {\n>> param([int]$a,[int]$b)\n>> $a + $b\n>> }\n>>\nPS C:\\> &$sum 4 5\n9\nPS C:\\> &$sum "4" 5\n9\nPS C:\\> &$sum "not a number" 5\nparam([int]$a,[int]$b)\n$a + $b\n : Cannot process argument transformation \non parameter 'a'. Cannot convert value \n"not a number" to type "System.Int32".\n Error: "Input string was not in a correct format."\nAt line:1 char:2\n+ & <<<< $sum "not a number" 5\n + CategoryInfo : \nInvalidData: (:) [], ParameterBindin...mationException\n + FullyQualifiedErrorId : \nParameterArgumentTransformationError<\/pre>\n$sum\u811a\u672c\u5757\u6c42\u4e24\u4e2a\u6574\u578b\u6570\u5b57\u7684\u548c\u3002\u4f20\u9012\u5b57\u7b26\u4e32\u4f1a\u89e6\u53d1\u81ea\u52a8\u7684\u7c7b\u578b\u8f6c\u6362\u3002\u5982\u679c\u4e0d\u6210\u529f\uff0c\u5c06\u5f97\u5230\u7c7b\u578b\u4e0d\u7b26\u7684\u9519\u8bef\u63d0\u793a\u3002<\/p>\n
\u5f53\u811a\u672c\u5757\u7684\u8c03\u7528\u8005\u6ca1\u6709\u63d0\u4f9b\u6240\u6709\u7684\u53c2\u6570\u65f6\u4e22\u5931\u7684\u53c2\u6570\u4f1a\u88ab\u521d\u59cb\u5316\u4e3a$null\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u7279\u6027\u68c0\u67e5\u662f\u5426\u5df2\u7ecf\u88ab\u4f20\u9012\u67d0\u4e2a\u53c2\u6570\u3002\u4e0b\u4f8b\u5728\u8c03\u7528\u8005\u6ca1\u6709\u63d0\u4f9b\u7ed9$lastName\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u201cUnknown\u201d\u9ed8\u8ba4\u503c\uff1a<\/p>\n
PS C:\\> $greeter = {\n>> param ([string] $firstName,[string]$lastName)\n>> if(!$lastName)\n>> {\n>> $lastName = "Unknown"\n>> }\n>> Write-Host "Hello, $firstName $lastName Welcome to the world of PowerShell"\n>> }\n>>\nPS C:\\> &$greeter "Liu" "Tao"\nHello, Liu Tao Welcome to the world of PowerShell\nPS C:\\> &$greeter "Liu"\nHello, Liu Unknown Welcome to the world of PowerShell<\/pre>\n\u4e0a\u9762\u7684\u65b9\u6cd5\u53ef\u4ee5\u5411\u7f3a\u5931\u53c2\u6570\u7684\u811a\u672c\u5757\u8c03\u7528\u63d0\u4f9b\u9ed8\u8ba4\u503c\uff0c\u4f46\u8fd9\u5e76\u4e0d\u662f\u6700\u597d\u7684\u65b9\u6cd5\u3002\u56e0\u4e3a\u5982\u679c\u5728\u811a\u672c\u5757\u4e2d\u5b58\u5728\u5f88\u591a\u53c2\u6570\u9700\u8981\u5224\u65ad\u53c2\u6570\u503c\u662f\u5426\u7f3a\u5931\uff0c\u5219\u4ee3\u7801\u4e2d\u4f1a\u6709\u5927\u91cf\u7684\u91cd\u590d\u4ee3\u7801\u7528\u4e8e\u5224\u65ad\u4f20\u9012\u7684\u53c2\u6570\u503c\u662f\u5426\u4e3a\u7a7a\u3002PowerShell\u63d0\u4f9b\u4e86\u53c2\u6570\u9ed8\u8ba4\u503c\u7684\u7b80\u5316\u7b26\u53f7\uff0c\u4e3a\u53c2\u6570\u5757\u8d4b\u503c\u610f\u5473\u7740\u5982\u679c\u8c03\u7528\u8005\u6ca1\u6709\u63d0\u4f9b\u53c2\u6570\u503c\uff0c\u53c2\u6570\u4f1a\u88ab\u521d\u59cb\u5316\u4e3a\u9ed8\u8ba4\u503c\u3002\u4e0b\u4f8b\u4f1a\u4e3a$greeter\u811a\u672c\u5757\u7684$lastName\u8d4b\u4e88\u9ed8\u8ba4\u503c\uff1a<\/p>\n
PS C:\\> $greeter = {\n>> param ([string] $firstName,[string] $lastName = "Unknown")\n>> Write-Host "Hello,$firstName $lastName Welcome to the world of PowerShell"\n>> }\n>>\nPS C:\\> &$greeter "Liu" "Tao"\nHello,Liu Tao Welcome to the world of PowerShell\nPS C:\\> &$greeter "Liu"\nHello,Liu Unknown Welcome to the world of PowerShell<\/pre>\n\u53c2\u6570\u9ed8\u8ba4\u503c\u80fd\u5305\u542b\u4efb\u4f55\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e00\u7279\u6027\u5b9e\u73b0\u5f3a\u5236\u53c2\u6570\uff0c\u5f3a\u5236\u53c2\u6570\u6307\u8c03\u7528\u8005\u5fc5\u987b\u63d0\u4f9b\u7ed9\u811a\u672c\u5757\u7684\u53c2\u6570\u3002\u4e3a\u6b64\u9700\u8981\u6dfb\u52a0\u629b\u51fa\u5f02\u5e38\u7684\u8868\u8fbe\u5f0f\uff0c\u4e00\u65e6\u8c03\u7528\u8005\u4e0d\u80fd\u6b63\u5e38\u63d0\u4f9b\u5f3a\u5236\u53c2\u6570\uff0c\u5c31\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u4e0b\u4f8b\u5728$greeter\u4e2d\u5c06$firstName\u53c2\u6570\u8bbe\u7f6e\u4e3a\u5f3a\u5236\u53c2\u6570\uff1a<\/p>\n
PS C:\\> $greeter = {\n>> param ($firstName =$(throw "firstName required!"),$lastName)\n>> Write-Host "Hello,$firstName $lastName Welcome to the world of PowerShell"\n>> }\n>>\nPS C:\\> &$greeter -lastName "Tao"\nfirstName required!\nAt line:2 char:27\n+ param ($firstName =$(throw <<<< "firstName required!"),$lastName)\n + CategoryInfo : OperationStopped: (firstName required!:String) [], RuntimeExceptio\n + FullyQualifiedErrorId : firstName required!<\/pre>\n\u5728\u8fd9\u91cc\u53ea\u9700\u8981\u77e5\u9053$(throw \u201cError message\u201d)\u7684\u683c\u5f0f\u7528\u6765\u5b9e\u73b0\u5f3a\u5236\u53c2\u6570\uff0c\u5c06\u4f1a\u5728\u7b2c11\u7ae0\u4e2d\u8be6\u7ec6\u8ba8\u8bba\u5f02\u5e38\u548c\u9519\u8bef\u5904\u7406\u3002<\/p>\n
\u5904\u7406\u7ba1\u9053\u8f93\u5165<\/b><\/p>\n
\u5728\u524d\u9762\u7684\u7ae0\u8282\u4e2d\u66fe\u7ecf\u6d89\u53ca\u5411cmdlet\u4f20\u9012\u811a\u672c\u5757\u5e76\u5728\u7ba1\u9053\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8c03\u7528\u5b83\u4eec\u3002\u4e0b\u4f8b\u6f14\u793a\u4f20\u9012\u811a\u672c\u5757\u7ed9ForEach-Object\u5e76\u83b7\u53d6\u4e3a\u6240\u6709\u6587\u672c\u6587\u4ef6\u6700\u540e\u7684\u5199\u5165\u65f6\u95f4\uff1a<\/p>\n
PS C:\\> dir *.txt | ForEach-Object {$_.LastWriteTime.Date}\n2009-1-3 10:09:25\n2009-1-3 22:52:23\n2009-1-6 14:52:45\n2009-1-8 08:42:31<\/pre>\n\u6bcf\u4e2a\u811a\u672c\u5757\u5305\u542b3\u4e2a\u6bb5\u6765\u505a\u7528\u4e8e\u7ba1\u9053\u8f93\u5165\uff0c\u5373begin, process\u548cend\u3002\u6bcf\u4e2a\u6bb5\u770b\u8d77\u6765\u50cf\u662f\u5d4c\u5957\u7684\u5757\uff0c\u5305\u542b\u96f6\u5230\u591a\u4e2a\u8bed\u53e5\u3002\u6700\u91cd\u8981\u7684\u6bb5\u662fprocess\uff0c\u5b83\u4f1a\u88ab\u7ba1\u9053\u4e2d\u7684\u6bcf\u4e2a\u5bf9\u8c61\u8c03\u7528\u3002\u4e3a\u4e86\u65b9\u4fbf\uff0c\u5f53\u524d\u7684\u5bf9\u8c61\u88ab\u6807\u8bb0\u4e3a$_\u53d8\u91cf\u3002\u4e0b\u4f8b\u4f7f\u7528process\u6bb5\u8fc7\u6ee4\u6570\u5b57\u96c6\u5408\u5e76\u8fd4\u56de\u6bd45\u5927\u7684\u6570\u5b57\uff1a<\/p>\n
PS C:\\> $greaterThanFive = {\n>> process {\n>> if ($_ -gt 5)\n>> {\n>> return $_\n>> }\n>> }\n>> }\n>>\nPS C:\\> 2,3,4,5,6,7 | &$greaterThanFive\n6\n7<\/pre>\n\u4e0eprocess\u7c7b\u4f3c\uff0c\u53ef\u4ee5\u5d4c\u5165begin\u548cend\u6bb5\u3002\u5b83\u4eec\u5206\u522b\u5728\u7ba1\u9053\u8fdb\u7a0b\u5f00\u59cb\u4e4b\u524d\u53ca\u7ed3\u675f\u4e4b\u540e\u6267\u884c\uff0c\u4e3b\u8981\u7528\u4e8e\u8ba1\u7b97\u96c6\u5408\u7edf\u8ba1\u4fe1\u606f\u6216\u4fdd\u6301\u7528\u4e8e\u521b\u5efa\u8fd4\u56de\u503c\u7684\u72b6\u6001\u3002\u4e0b\u4f8b\u5c06\u6f14\u793a\u5982\u4f55\u521b\u5efa\u7528\u4e8e\u5bf9\u7ba1\u9053\u4e2d\u4f20\u5165\u7684\u6240\u6709\u6570\u5b57\u6c42\u548c\u811a\u672c\u5757\uff1a<\/p>\n
PS C:\\> $sum = {\n>> begin {\n>> $total = 0\n>> }\n>> process {\n>> $total +=$_\n>> }\n>> end {\n>> return $total\n>> }\n>> }\n>>\nPS C:\\> 1,3,5,7,8 | &$sum\n24<\/pre>\n\u5176\u4e2d\u7684process\u6bb5\u5c06\u5f53\u524d\u503c\u53e0\u52a0\u5230\u6c42\u548c\u503c$total\u4e0a\uff0c\u8fd4\u56de\u503c\u7684\u64cd\u4f5c\u5728end\u6bb5\u4e2d\u5b9e\u73b0\u3002\u5728process\u6bb5\u4e2d\u4f7f\u7528\u4e86+=\u64cd\u4f5c\u7b26\uff0c\u7528\u4e8e\u83b7\u53d6\u53f3\u4fa7\u7684\u53d8\u91cf\u503c\u76f8\u52a0\u5230\u5de6\u4fa7\u7684\u53d8\u91cf\u4e0a\u3002\u8ba1\u7b97$total\u503c\u901a\u8fc7\u53cd\u590d\u53e0\u52a0\u5f53\u524d\u503c\uff0c\u5e76\u628a$_\u53d8\u91cf\u4f20\u9012\u7ed9$total\u53d8\u91cf\u3002<\/p>\n
\u811a\u672c\u5757\u65e2\u80fd\u63a5\u6536\u53c2\u6570\uff0c\u4e5f\u80fd\u63a5\u6536\u7ba1\u9053\u8f93\u5165\u3002\u5728\u5f53\u524d\u4f5c\u7528\u57df\u548c$args\u96c6\u5408\u4e2d\u547d\u540d\u53c2\u6570\u548c\u4f4d\u7f6e\u53c2\u6570\u6709\u6548\uff0c\u800c\u7ba1\u9053\u5bf9\u8c61\u662f\u88ab\u4f20\u9012\u5230$_\u53d8\u91cf\u4e2d\u3002\u4e3a\u4e86\u793a\u8303\u5982\u4f55\u521b\u5efa\u53c2\u6570\u548c\u7ba1\u9053\u8f93\u5165\uff0c\u4e0b\u4f8b\u7d2f\u52a0\u7ba1\u9053\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff1a<\/p>\n
PS C:\\> $adder = {\n>> param($number)\n>> process{\n>> $_ +$number\n>> }\n>> }\n>>\nPS C:\\> 1,3,5 | &$adder 10\n11\n13\n15<\/pre>\n\u4e0a\u4f8b\u5c06\u64cd\u4f5c\u7684\u65b9\u6cd5\u548c\u5177\u4f53\u7684\u5e94\u7528\u5265\u79bb\u5f00\uff0c\u4fbf\u4e8e\u8bfb\u8005\u7406\u89e3\u3002\u4e0b\u4f8b\u8ba1\u7b97\u7279\u5b9a\u65e5\u671f\u548c\u5f53\u524d\u76ee\u5f55\u4e0b\u6587\u672c\u6587\u4ef6\u6700\u540e\u4fee\u6539\u65f6\u95f4\u4e4b\u95f4\u7684\u5929\u6570\uff1a<\/p>\n
PS C:\\> $dateDiff = {\n>> param([datetime]$referenceDate)\n>> process {\n>> ($referenceDate - $_.LastWriteTime.Date).Days\n>> }\n>> }\n>>\nPS C:\\> dir *.txt | &$dateDiff([datetime]::Today)\n5\n7\n13\n22\n84<\/pre>\n\u9700\u8981\u5f3a\u8c03\u7684\u662f\u5bf9\u4e8e[datetime]:Today\u4f7f\u7528\u4e86\u5706\u62ec\u53f7\u3002\u5982\u679c\u6ca1\u6709\u62ec\u53f7\uff0cDateTime\u5bf9\u8c61\u88ab\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u540e\u6bd4\u8f83\u65f6\u4f1a\u88ab\u518d\u6b21\u8f6c\u6362\u4e3aDateTime\u5bf9\u8c61\u3002\u8fd9\u4e24\u6b21\u8f6c\u6362\u4f7f\u5f97\u4ee3\u7801\u6548\u7387\u964d\u4f4e\u5e76\u53ef\u80fd\u56e0\u4e3adatetime\u5b57\u7b26\u4e32\u5728\u4e0d\u540c\u8bed\u8a00\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u8868\u793a\u65b9\u6cd5\u7684\u4e0d\u540c\u800c\u4f7f\u5f97\u8f6c\u6362\u51fa\u73b0\u5f02\u5e38\u3002<\/p>\n
\u5c06\u5b57\u7b26\u4e32\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u8c03\u7528<\/b><\/p>\n
\u51e0\u4e4e\u6240\u6709\u7684\u811a\u672c\u8bed\u8a00\u90fd\u6709\u7279\u6b8a\u7684\u51fd\u6570\u6216\u64cd\u4f5c\u6765\u5c06\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u4f5c\u4e3a\u4ee3\u7801\u5757\u7f16\u8bd1\u5e76\u6267\u884c\uff0cPowerShell\u4e2d\u7684Invoke-Expression\u7684cmdlet\u5b9e\u73b0\u8be5\u529f\u80fd\u3002\u5b57\u7b26\u4e32\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u6216\u8005\u4ece\u5176\u4ed6\u547d\u4ee4\u4e2d\u7528\u7ba1\u9053\u4f20\u9012\uff0c\u4e0b\u4f8b\u6f14\u793a\u5982\u4f55\u4f7f\u7528Invoke-Expression\uff1a<\/p>\n
PS C:\\> Invoke-Expression "Write-Host 'invoke expression'"\ninvoke expression<\/pre>\n\u9700\u8981\u5f3a\u8c03\u7684\u662f\u5728\u8bed\u53e5\u4e2d\u9700\u8981\u5bf9\u5f15\u53f7\u8fdb\u884c\u8f6c\u4e49\u6216\u8005\u5728\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528\u5355\u5f15\u53f7\u7684\uff0c\u8fd9\u6837\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u64cd\u4f5c\u5b57\u7b26\u4e32\u5e76\u4e14\u521b\u5efa\u9ad8\u5ea6\u52a8\u6001\u800c\u4f18\u96c5\u7684\u811a\u672c\u3002\u4e0b\u4f8b\u751f\u6210\u591a\u4e2a\u547d\u4ee4\u5e76\u7528\u7ba1\u9053\u4f20\u9012\u7ed9Invoke-Expression\u6267\u884c\uff1a<\/p>\n
PS C:\\> 1..5 | foreach {"Write-Host 'Got $_'"}| Invoke-Expression\nGot 1\nGot 2\nGot 3\nGot 4\nGot 5<\/pre>\n\u8c03\u7528\u8868\u8fbe\u5f0f\u4e0e\u521b\u5efa\u5e76\u6267\u884c\u811a\u672c\u5757\u76f8\u4f3c\uff0cInvoke-Expression\u7684\u4f5c\u7528\u5f62\u5f0f\u4e5f\u662f\u7c7b\u4f3c\u7684\u3002\u5b83\u4f1a\u521b\u5efa\u5e76\u6267\u884c\u65b0\u7684\u811a\u672c\u5757\uff0c\u4f20\u9012\u53c2\u6570\u5e76\u901a\u8fc7\u7ba1\u9053\u5c06\u8fd4\u56de\u503c\u7ed9\u4e0b\u4e00\u4e2a\u547d\u4ee4\u3002\u9700\u8981\u8c28\u8bb0\u7684\u662f\uff0c\u4e0e\u811a\u672c\u5757\u4e0d\u540c\u7684\u662fInvoke-Expression\u4e0d\u4f1a\u521b\u5efa\u5b50\u53d8\u91cf\u4f5c\u7528\u57df\u3002\u5b83\u603b\u4f1a\u5728\u5f53\u524d\u7684\u4f5c\u7528\u57df\u4e2d\u6267\u884c\uff0c\u5982\u4e0b\uff1a<\/p>\n
PS C:\\> $name = "LiuTao"\nPS C:\\> Invoke-Expression "`$name = 'WangLei'"\nPS C:\\> $name\nWangLei<\/pre>\n\u6b63\u5982\u4e0a\u4f8b\u4e2d\u6240\u793a\uff0c$name\u53d8\u91cf\u88ab\u4fee\u6539\uff0c\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u6267\u884c\u3002\u5728\u521b\u5efa\u547d\u4ee4\u5b57\u7b26\u4e32\u65f6\u4f7f\u7528\u4e86\u4e24\u4e2a\u5f15\u53f7\uff0c\u6240\u4ee5\u9700\u8981\u5bf9\u7f8e\u5143\u7b26\u8f6c\u4e49\u4ee5\u4f20\u9012\u5230Invoke-Expression\u4e2d\u7684\u5b57\u7b26\u4e32\u5305\u542b\u53d8\u91cf\u540d\uff0c\u800c\u4e0d\u662f\u88ab\u5c55\u5f00\u7684\u53d8\u91cf\u503c\u3002<\/p>\n
\u4f7f\u7528Invoke-Expression\u7684\u6700\u5927\u597d\u5904\u662f\u5f88\u5bb9\u6613\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u53ef\u6267\u884c\u7684\u547d\u4ee4\uff0c\u4e0b\u4f8b\u6f14\u793a\u5982\u4f55\u4f7f\u7528cmdlet\u521b\u5efa\u5141\u8bb8\u7528\u6237\u8f93\u5165\u8868\u8fbe\u5f0f\u7684\u8ba1\u7b97\u7a0b\u5e8f\uff1a<\/p>\n
\uff1aPS C:\\> $expression = Read-Host "Enter expression"\nEnter expression: 5*6-4\nPS C:\\> $result = Invoke-Expression $expression\nPS C:\\> Write-Host $result\n26<\/pre>\n\u7531\u4e8e\u5c1a\u672a\u5bf9\u8f93\u5165\u8fdb\u884c\u6821\u9a8c\uff0c\u6240\u4ee5\u4efb\u4f55\u8f93\u5165\u7684\u4ee3\u7801\u5c06\u4f1a\u88ab\u6267\u884c\uff0c\u5982\u679c\u7528\u6237\u8f93\u5165\u4e00\u4e0b\u8868\u8fbe\u5f0f4*6;del C:\\-recurse \u2013force\uff0c\u5219\u5c06\u4f1a\u4e22\u5931\u7cfb\u7edf\u76d8\u6240\u6709\u7684\u6570\u636e\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\u9700\u8981\u9a8c\u8bc1\u7528\u6237\u8f93\u5165\uff0c\u907f\u514dInvoke-Expression\u6267\u884c\u4efb\u4f55\u5c1a\u672a\u8fc7\u6ee4\u5371\u9669\u64cd\u4f5c\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n
\u53e6\u5916\u4e00\u79cd\u6267\u884c\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u662f\u901a\u8fc7\u4f7f\u7528\u5168\u5c40\u53d8\u91cf$ExecutionContent\uff0c\u5b83\u662fSystem.Management.Automation.EngineIntrinsics\u7c7b\u578b\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u5c5e\u6027InvokeCommand\uff0c\u662fSystem.Management.Automation.CommandInvocationIntrinsics\u7c7b\u578b\u3002\u53ef\u4ee5\u4f7f\u7528Invoke-Command\u7684InvokeScript\u65b9\u6cd5\u6765\u5b9e\u73b0Invoke-Expression\u6240\u505a\u7684\u4e00\u5207\uff1a<\/p>\n
PS C:\\> $ExecutionContext.InvokeCommand.InvokeScript("Write-Host 'invoke'")\ninvoke<\/pre>\n$ExecutionContext.InvokeCommand\u5bf9\u8c61\u5f88\u6709\u7528\uff0c\u5b83\u5141\u8bb8\u7528\u6237\u628a\u5b57\u7b26\u4e32\u7f16\u8bd1\u4e3a\u811a\u672c\u5757\u3002\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u7a0d\u540e\u6267\u884c\u7684\u52a8\u6001\u547d\u4ee4\uff0c\u5982\uff1a<\/p>\n
PS C:\\> $cmd = "Write-Host `"`$(`$args[0])`""\nPS C:\\> $cmdBlock = $ExecutionContext.InvokeCommand.NewScriptBlock($cmd)\nPS C:\\> &$cmdBlock "test"\ntest<\/pre>\n\u867d\u7136\u80fd\u591f\u5b58\u50a8\u5b57\u7b26\u4e32\u5e76\u4f7f\u7528Invoke-Expression\u8c03\u7528\u5b83\u6765\u6267\u884c\uff0c\u4f46\u662f\u811a\u672c\u5757\u7684\u4ee3\u7801\u53ea\u5728\u521b\u5efa\u65f6\u7f16\u8bd1\u4e00\u6b21\uff0c\u800cInvoke-Expression\u4f1a\u5728\u6bcf\u6b21\u6267\u884c\u884c\u7f16\u8bd1\u3002\u8fd9\u6837\u5982\u679c\u811a\u672c\u5185\u5bb9\u5f88\u591a\uff0c\u7f16\u8bd1\u65f6\u95f4\u4f1a\u5f88\u957f\uff1b\u53e6\u5916\uff0c\u811a\u672c\u5757\u4f1a\u521b\u5efa\u5b50\u53d8\u91cf\u4f5c\u7528\u57df\uff0c\u5982\u679c\u8981\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u4fdd\u62a4\u53d8\u91cf\u503c\uff0c\u5b50\u53d8\u91cf\u4f5c\u7528\u5373\u53ef\u5b9e\u73b0\u3002\u901a\u5e38\u5904\u7406\u5d4c\u5957\u4f5c\u7528\u57df\u53ef\u4ee5\u5c06\u7236\u4f5c\u7528\u57df\u53d8\u91cf\u58f0\u660e\u4e3ascript\u6216global\u4f5c\u7528\u57df\uff0c\u6216\u5728\u811a\u672c\u5757\u9700\u8981\u4fee\u6539\u53d8\u91cf\u65f6\u7528Get-Variable\u548cSet-Variable\u6539\u53d8\u5185\u5bb9\u3002<\/p>\n
\u811a\u672c\u5757\u4f5c\u4e3a\u59d4\u6258<\/b><\/p>\n
\u59d4\u6258\u662f.NET\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u7b80\u800c\u8a00\u4e4b\uff0c\u5982\u679c\u65b9\u6cd5\u4e0d\u662f\u9759\u6001\u7684\uff0c\u59d4\u6258\u5373\u7528\u4e8e\u5b58\u50a8.NET\u7c7b\u3001\u65b9\u6cd5\u5f15\u7528\u548c\u5bf9\u8c61\u5f15\u7528\u7684\u5bf9\u8c61\u3002\u5f53\u8c03\u7528\u59d4\u6258\u65f6\uff0c\u5b83\u6307\u5411\u5bf9\u8c61\u7684\u65b9\u6cd5\u4f1a\u88ab\u6267\u884c\u3002NET\u4e2d\u7684\u4e8b\u4ef6\u5de5\u5177\u6307\u5411\u4e8b\u4ef6\u63a5\u6536\u5bf9\u8c61\u7684\u59d4\u6258\u548c\u65b9\u6cd5\uff0c\u4f20\u9012\u8fd9\u4e9b\u59d4\u6258\u5230\u4e8b\u4ef6\u89e6\u53d1\u8005\u3002\u5f53\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u4e8b\u4ef6\u89e6\u53d1\u8005\u8c03\u7528\u4e8b\u4ef6\u59d4\u6258\u3002<\/p>\n
\u811a\u672c\u5757\u548c\u59d4\u6258\u6709\u5f88\u591a\u76f8\u4f3c\u70b9\uff0c\u4e8c\u8005\u90fd\u662f\u6307\u5411\u4e00\u4e9b\u4ee3\u7801\u5e76\u8c03\u7528\u6267\u884c\u3002PowerShell\u7684\u7c7b\u578b\u7cfb\u7edf\u5141\u8bb8\u5c06\u811a\u672c\u5757\u8f6c\u6362\u4e3a\u59d4\u6258\u3002\u53ea\u6709System.EventHandler\u7c7b\u578b\u7684\u59d4\u6258\u662f\u652f\u6301\u7684\uff0c\u5373\u53ea\u6709\u5e26\u5bf9\u8c61\u548cSystem.EventArgs\u5b9e\u4f8b\u4e3a\u53c2\u6570\u7684\u811a\u672c\u5757\u53ef\u4ee5\u88ab\u8f6c\u6362\u4e3a\u59d4\u6258\u3002\u4e0b\u4f8b\u6f14\u793a\u5982\u4f55\u58f0\u660e\u811a\u672c\u5757\u5e76\u8f6c\u6362\u4e3a\u59d4\u6258\uff1a<\/p>\n
PS C:\\> $handler = {\n>> param($sender,[EventArgs] $eventArgs)\n>> Write-Host "Event raised!"\n>> }\n>>\nPS C:\\> $delegate = [EventHandler] $handler\nPS C:\\> $delegate.GetType().FullName\nSystem.EventHandler<\/pre>\n\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528Invoke()\u65b9\u6cd5\u8c03\u7528\u59d4\u6258\uff1a<\/p>\n
PS C:\\> $delegate.Invoke(3,[EventArgs]::Empty)\nEvent raised!<\/pre>\n\u53ef\u4ee5\u521b\u5efaWindows\u7a97\u4f53\u7a0b\u5e8f\u6765\u6a21\u4eff\u56fe\u5f62\u8f93\u5165\u6846\uff0c\u5141\u8bb8\u7528\u6237\u8f93\u5165\u3002\u4e3a\u6b64\uff0c\u9700\u8981\u521b\u5efaForm\u5bf9\u8c61\u5e76\u5728\u5176\u4e2d\u589e\u52a0TextBox\u548cButton\u63a7\u4ef6\u7ed1\u5b9aButton\u7684Click\u4e8b\u4ef6\u5904\u7406\u3002Click\u4e8b\u4ef6\u5904\u7406\u5c06\u4f1a\u5173\u95ed\u7a97\u53e3\uff0c\u5e76\u628aTextBox\u4e2d\u7684\u503c\u5b58\u50a8\u5230\u5168\u5c40\u53d8\u91cf\uff0c\u4ee5\u4e0b\u662f\u4ee3\u7801\uff1a<\/p>\n
PS C:\\> $null = [Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")\nPS C:\\> $form = New-Object Windows.Forms.Form\nPS C:\\> $form.Size = New-Object Drawing.Size -arg 300,85\nPS C:\\> $textBox = New-Object Windows.Forms.textBox\nPS C:\\> $textBox.Dock = "Fill"\nPS C:\\> $form.Controls.Add($textBox)\nPS C:\\> $button = New-Object Windows.Forms.Button\nPS C:\\> $button.Text = "Done"\nPS C:\\> $button.Dock = "Bottom"\nPS C:\\> $button.add_Click(\n>> {$global:resultText = $textBox.Text;$form.Close()})\n>> $form.Controls.Add($button)\n>> [Void] $form.ShowDialog()\n>> Write-Host $global:resultText\n>>\nHello ,Windows Form in PowerShell!<\/pre>\n\u5728\u7b2c1\u884c\u4e2dPowerShell\u6ca1\u6709\u9ed8\u8ba4\u8f7d\u5165System.Windows.Forms\u7684\u6c47\u7f16\u5bf9\u8c61\u3002\u521b\u5efaForm\u5bf9\u8c61\uff0c\u5e76\u8bbe\u7f6e\u7a97\u53e3\u5927\u5c0f\u4e3a300\u50cf\u7d20\u5bbd\uff0c85\u50cf\u7d20\u9ad8\u3002\u7136\u540e\u6dfb\u52a0\u5145\u6ee1\u6574\u4e2a\u7a97\u53e3\u5bbd\u5ea6\u7684TextBox\u63a7\u4ef6\uff0c\u5373\u6c34\u5e73\u65b9\u5411\u4f7f\u7528\u6240\u6709\u53ef\u7528\u7a7a\u95f4\u3002\u6700\u540e\u6dfb\u52a0Button\u63a7\u4ef6\uff0c\u5176\u4e2d\u5305\u542b\u8c03\u7528add_Click\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u628a\u59d4\u6258\u4f5c\u4e3a\u53c2\u6570\u5e76\u7ed1\u5b9aClick\u4e8b\u4ef6\u3002\u9700\u8981\u5f3a\u8c03\u7684\u662f\u5728\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u4e0d\u9700\u8981\u663e\u5f0f\u629b\u51fa\uff0cPowerShell\u81ea\u52a8\u5b8c\u6210\u3002\u4ee3\u7801\u6267\u884c\u540e\u663e\u793a\u5982\u56fe1\u6240\u793a\u7684\u8f93\u5165\u6846\u7a97\u53e3\u3002<\/p>\n
![](\"http:\/\/tech.ccidnet.com\/col\/attachment\/2010\/6\/2031831.jpg\")
<\/p>\n
\u5728\u5176\u6846\u4e2d\u8f93\u5165\u201cHello ,Windows Form in PowerShell!\u201d\uff0c\u5355\u51fb\u201cDone\u201d\u6309\u94ae\uff0c\u80fd\u591f\u770b\u5230\u63a7\u5236\u53f0\u8f93\u51fa\u201cHello ,Windows Form in PowerShell!\u201d\u3002\u8bf4\u660ePowerShell\u5df2\u7ecf\u63a5\u53d7\u4e86Form\u5bf9\u8c61\u7684\u4e8b\u4ef6\u59d4\u6258\uff0c\u5373\u5c06Form\u63a5\u6536\u7684\u53c2\u6570\u4f20\u9012\u7ed9PowerShell\u5904\u7406\u3002<\/p>\n