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ADO Read 方法
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The Read method is used to read the entire stream or a specified number of bytes from a binary Stream object and returns the resulting data as a variant.
Read的作用是：从一个二进制记录流对象中读出指定字节数的内容或整段记录流，并返回结果数据。
Note: This method is only used with binary Stream objects, for text Stream objects, use the ReadText method.
注意：这个方法仅用在二进制记录流对象中[binary Stream objects]；如果需要对文本记录流对象进行操作[text Stream objects]，那么需要使用ReadText方法。
Syntax
语法
var=objStream.Read numbytes |
| Parameter参数 | Description描述 |
|---|---|
| numbytes | Optional. The number of bytes to read from the file, or a StreamReadEnum value. Default is adReadAll 可选参数。指定从文件中或从一个StreamReadEnum值中读取的字节数。默认值为adReadAll If you have specified more than the number of bytes left in the Stream, only the bytes remaining are returned. |
StreamReadEnum Values
| Constant常量 | Value值 | Description描述 |
|---|---|---|
| adReadAll | -1 | Default. Reads all bytes from the stream, from the current position to EOS. 默认值。读取记录流中从起始位置到末尾位置的所有字节 Note: This is the only valid value with binary Stream objects |
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