方式一:TransmitFile实现下载。将指定的文件直接写入 HTTP 响应输出流,而不在内存中缓冲该文件。
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
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方式二:WriteFile实现下载,将指定的文件直接写入 HTTP 响应输出流。注意:对大型文件使用此方法时,调用此方法可能导致异常。可以使用此方法的文件大小取决于 Web 服务器的硬件配置。
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
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方式三:WriteFile分块下载
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
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方式四:流方式下载
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![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif)
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![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif)
![](http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif)
方式一:TransmitFile实现下载。将指定的文件直接写入 HTTP 响应输出流,而不在内存中缓冲该文件。
方式二:WriteFile实现下载,将指定的文件直接写入 HTTP 响应输出流。注意:对大型文件使用此方法时,调用此方法可能导致异常。可以使用此方法的文件大小取决于 Web 服务器的硬件配置。
方式三:WriteFile分块下载
方式四:流方式下载