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分享如果在备份单机版数据库时（copyfile函数），由于目标文件事先并不存在，这样先用if not fileexits then 判断，但是假如判断后，没有目标
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chris2019 2002-04-21
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pppppppp
outer2000 2002-04-16
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函数本身就可创建一个不存在的文件啊？
outer2000 2002-04-16
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BOOL CopyFile(
LPCTSTR lpExistingFileName, // pointer to name of an existing file
LPCTSTR lpNewFileName, // pointer to filename to copy to
BOOL bFailIfExists // flag for operation if file exists
);
Parameters
lpExistingFileName
Points to a null-terminated string that specifies the name of an existing file.
lpNewFileName
Points to a null-terminated string that specifies the name of the new file.
bFailIfExists
Specifies how this operation is to proceed if a file of the same name as that specified by lpNewFileName already exists. If this parameter is TRUE and the new file already exists, the function fails. If this parameter is FALSE and the new file already exists, the function overwrites the existing file and succeeds.
LPCTSTR lpExistingFileName, // pointer to name of an existing file
LPCTSTR lpNewFileName, // pointer to filename to copy to
BOOL bFailIfExists // flag for operation if file exists
);
Parameters
lpExistingFileName
Points to a null-terminated string that specifies the name of an existing file.
lpNewFileName
Points to a null-terminated string that specifies the name of the new file.
bFailIfExists
Specifies how this operation is to proceed if a file of the same name as that specified by lpNewFileName already exists. If this parameter is TRUE and the new file already exists, the function fails. If this parameter is FALSE and the new file already exists, the function overwrites the existing file and succeeds.
outer2000 2002-04-16
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BOOL CopyFile(
LPCTSTR lpExistingFileName, // pointer to name of an existing file
LPCTSTR lpNewFileName, // pointer to filename to copy to
BOOL bFailIfExists // flag for operation if file exists
);
Parameters
lpExistingFileName
Points to a null-terminated string that specifies the name of an existing file.
lpNewFileName
Points to a null-terminated string that specifies the name of the new file.
bFailIfExists
Specifies how this operation is to proceed if a file of the same name as that specified by lpNewFileName already exists. If this parameter is TRUE and the new file already exists, the function fails. If this parameter is FALSE and the new file already exists, the function overwrites the existing file and succeeds.
LPCTSTR lpExistingFileName, // pointer to name of an existing file
LPCTSTR lpNewFileName, // pointer to filename to copy to
BOOL bFailIfExists // flag for operation if file exists
);
Parameters
lpExistingFileName
Points to a null-terminated string that specifies the name of an existing file.
lpNewFileName
Points to a null-terminated string that specifies the name of the new file.
bFailIfExists
Specifies how this operation is to proceed if a file of the same name as that specified by lpNewFileName already exists. If this parameter is TRUE and the new file already exists, the function fails. If this parameter is FALSE and the new file already exists, the function overwrites the existing file and succeeds.
zx_wang 2002-04-16
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copyfile
记录文件 域，域名，域值 顺序文件：只能按顺序进行读取，不能随意定位进行读取。仅适合于小容量文件 随机文件：按记录读取，可以随机定位，读取速度快，对大容量记录文件效率最高 二进制文件：以字节进行...
