| 术语 | pdhreadrawlogrecord |
| 释义 | PdhReadRawLogRecord 语法： C++ PDH_STATUS PdhReadRawLogRecord( __in PDH_HLOG hLog, __in FILETIME ftRecord, __out PPDH_RAW_LOG_RECORD pRawLogRecord, __in LPDWORD pdwBufferLength ); PdhReadRawLogRecord功能 读取指定的二进制信息跟踪日志文件。 参数 hLog [in] 处理日志文件。在PdhOpenLog或PdhBindInputDataSource函数返回此句柄。 ftRecord [in] 时间记录邮票被读取。如果时间戳不匹配的日志文件中记录，该函数返回的记录，有一个时间戳最接近(但不大于)给定的时间戳记。 pRawLogRecord [out] 来电分配的缓冲区，它接收PDH_RAW_LOG_RECORD结构的结构包含日志文件记录信息。设置为NULL，如果pdwBufferLength是零。 pdwBufferLength [in] 的大小pRawLogRecord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。 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_DATAThe pRawLogRecord缓冲区太小，无法包含路径元素。这个返回值，预计如果pdwBufferLength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_MEMORY_ALLOCATION_FAILUREUnable分配内存才能完成的功能。 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pRawLogRecord为NULL和pdwBufferLength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 参见 PDH_RAW_LOG_RECORD PdhFormatFromRawValue PdhCollectQueryData 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＝＝PdhReadRawLogRecord Function Reads the information in the specified binary trace log file. Syntax C++ PDH_STATUS PdhReadRawLogRecord( __in PDH_HLOG hLog, __in FILETIME ftRecord, __out PPDH_RAW_LOG_RECORD pRawLogRecord, __in LPDWORD pdwBufferLength ); Parameters hLog [in] Handle to the log file. The PdhOpenLog or PdhBindInputDataSource function returns this handle. ftRecord [in] Time stamp of the record to be read. If the time stamp does not match a record in the log file, the function returns the record that has a time stamp closest to (but not greater than) the given time stamp. pRawLogRecord [out] Caller-allocated buffer that receives a PDH_RAW_LOG_RECORD structure; the structure contains the log file record information. Set to NULL if pdwBufferLength is zero. pdwBufferLength [in] Size of the pRawLogRecord 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. 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_DATAThe pRawLogRecord buffer is too small to contain the path elements. This return value is expected if pdwBufferLength 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_MEMORY_ALLOCATION_FAILUREUnable to allocate memory in order to complete the function. Remarks You should call this function twice, the first time to get the required buffer size (set pRawLogRecord to NULL and pdwBufferLength 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 See Also PDH_RAW_LOG_RECORD PdhFormatFromRawValue PdhCollectQueryData Send comments about this topic to Microsoft Build date: 7/23/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/aa372662(VS.85).aspx\n |
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