| 术语 | pdhparseinstancename |
| 释义 | PdhParseInstanceName 语法： C++ PDH_STATUS PdhParseInstanceName( __in LPCTSTR szInstanceString, __out LPTSTR szInstanceName, __in LPDWORD pcchInstanceNameLength, __out LPTSTR szParentName, __inout LPDWORD pcchParentNameLength, __out LPDWORD lpIndex ); PdhParseInstanceName功能 解析实例的字符串的内容。 参数 szInstanceString [in] null结尾的字符串，指定实例的字符串解析为单个组件。这个字符串可以包含下列格式，小于MAX_PATH字符长度： 实例 instance#index parent/instance parent/instance#index szInstanceName [out] 来电分配的缓冲区，它接收空终止实例的名称。设置为NULL，如果pcchInstanceNameLength是零。 pcchInstanceNameLength [in] 的大小szInstanceName缓冲区，在TCHARs。如果零输入，该函数返回PDH_MORE_DATA，并设置此参数所需的缓冲区大小。如果缓冲区比所需的大小，功能设置此参数的时候，往往有人使用的缓冲区的实际大小。如果在输入指定的大小是大于零，但比所需的大小少，您不应该依靠返回的大小重新分配缓冲区。 szParentName [out] 来电分配的缓冲区，它接收空终止父实例的名称，如果是指定的。设置为NULL，如果pcchParentNameLength是零。 pcchParentNameLength [ in , out ] 的大小szParentName缓冲区，在TCHARs。如果零输入，该函数返回PDH_MORE_DATA，并设置此参数所需的缓冲区大小。如果缓冲区比所需的大小，功能设置此参数的时候，往往有人使用的缓冲区的实际大小。如果在输入指定的大小是大于零，但比所需的大小少，您不应该依靠返回的大小重新分配缓冲区。 lpIndex [out] 指数值的实例。如果一个索引项不存在的字符串，则该值为0。此参数可以为NULL。 返回值 如果函数成功，它返回ERROR_SUCCESS。 如果函数失败，返回值是一个系统错误代码或一种PDH错误代码。以下是可能的值。 返回codeDescription PDH_INVALID_ARGUMENTA参数无效。例如，在某些版本中您可以收到此错误如果在输入指定的大小是大于零但小于所需的大小。 PDH_MORE_DATAOne或字符串缓冲区太小都包含数据。这个返回值，预计如果相应大小的缓冲区，是在输入为零。如果在输入指定的大小是大于零，但比所需的大小少，您不应该依靠返回的大小重新分配缓冲区。 PDH_INVALID_INSTANCEThe实例的字符串的格式不正确，超过MAX_PATH字符的长度，或无法解析。 备注 您应该调用这个函数两次，第一次获得所需的缓冲区大小(设置为NULL的缓冲区和缓冲的大小为0)，和第二次获取数据。 要求： 最低支持：client－Windows 2000专业版 最低支持server－Windows 2000服务器 HeaderPdh.h LibraryPdh.lib DLLPdh.dll Unicode和ANSI namesPdhParseInstanceNameW(Unicode)和PdhParseInstanceNameA(ANSI)的 参见 PdhMakeCounterPath 如果有任何问题和意见，请发送给微软(wsddocfb@microsoft.com) 生成日期：2009年7月23日 ＝＝英文原文＝＝PdhParseInstanceName Function Parses the elements of an instance string. Syntax C++ PDH_STATUS PdhParseInstanceName( __in LPCTSTR szInstanceString, __out LPTSTR szInstanceName, __in LPDWORD pcchInstanceNameLength, __out LPTSTR szParentName, __inout LPDWORD pcchParentNameLength, __out LPDWORD lpIndex ); Parameters szInstanceString [in] Null-terminated string that specifies the instance string to parse into individual components. This string can contain the following formats, and is less than MAX_PATH characters in length: instance instance#index parent/instance parent/instance#index szInstanceName [out] Caller-allocated buffer that receives the null-terminated instance name. Set to NULL if pcchInstanceNameLength is zero. pcchInstanceNameLength [in] Size of the szInstanceName buffer, in TCHARs. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. szParentName [out] Caller-allocated buffer that receives the null-terminated name of the parent instance, if one is specified. Set to NULL if pcchParentNameLength is zero. pcchParentNameLength [in, out] Size of the szParentName buffer, in TCHARs. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. lpIndex [out] Index value of the instance. If an index entry is not present in the string, then this value is zero. This parameter can be NULL. Return Value If the function succeeds, it returns ERROR_SUCCESS. If the function fails, the return value is a system error code or a PDH error code . The following are possible values. Return codeDescription PDH_INVALID_ARGUMENTA parameter is not valid. For example, on some releases you could receive this error if the specified size on input is greater than zero but less than the required size. PDH_MORE_DATAOne or both of the string buffers are too small to contain the data. This return value is expected if the corresponding size buffer is zero on input. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. PDH_INVALID_INSTANCEThe instance string is incorrectly formatted, exceeds MAX_PATH characters in length, or cannot be parsed. Remarks You should call this function twice, the first time to get the required buffer size (set the buffers to NULL and buffer sizes to 0), and the second time to get the data. Requirements Minimum supported clientWindows 2000 Professional Minimum supported serverWindows 2000 Server HeaderPdh.h LibraryPdh.lib DLLPdh.dll Unicode and ANSI namesPdhParseInstanceNameW (Unicode) and PdhParseInstanceNameA (ANSI) See Also PdhMakeCounterPath Send comments about this topic to Microsoft Build date: 7/23/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/aa372660(VS.85).aspx\n |
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