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ADO CopyTo 方法


❮ 流对象完整参考

CopyTo 方法用于将指定数量的字符或字节从打开的 Stream 对象复制到另一个打开的 Stream 对象。

两个 Stream 对象的类型应该相同。但是,文本 Stream 对象可以复制到二进制 Stream 对象,反之则不行,并且目标 Stream 对象的 CharSet 属性可以与源 Stream 对象不同。

语法

objStream.CopyTo dest,numchars

参数 描述
dest 必需。复制 Stream 的目标位置(包含对打开的 Stream 对象的引用)
numchars 可选。一个整数,指定从源 Stream 中当前位置复制到目标 Stream 的字符或字节数。默认为 -1(将从当前位置复制所有数据到 EOS)

注意:如果指定的数字大于到 EOS 的可用字节/字符数,则仅复制从当前位置到 EOS 的字节/字符。


❮ 流对象完整参考
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