c# – 需要双重冲洗吗？

概述刷新StreamWriter后是否需要刷新流？ public static async Task WriteStringAsync(this Stream stream, string messageString){ var encoding = new UTF8Encoding(false); //no BOM using (var streamWriter = 刷新StreamWriter后是否需要刷新流？

public static async Task WriteStringAsync(this Stream stream,string messageString){        var enCoding = new UTF8EnCoding(false); //no BOM        using (var streamWriter = new StreamWriter(stream,enCoding))        {            await streamWriter.WriteAsync(messageString);            await streamWriter.FlushAsync();        }        await stream.FlushAsync(); //is this necessary?}

解决方法 根据MSDN文档,这可以被原谅为“只是确保”……

StreamWriter.Flush()：

Clears all buffers for the current writer and causes any buffered data to be written to the underlying stream.

Stream.Flush()：

When overrIDden in a derived class,clears all buffers for this stream and causes any buffered data to be written to the underlying device.

…但是,仔细查看TypeDescriptor中的代码会显示StreamWriter.Flush()(我假设它的异步对应FlushAsync)是一个调用主函数的重载,传递两个布尔参数,指示StreamWriter刷新Stream和Unicode编码器也是如此.因此,一次调用StreamWriter.FlushAsync(),再加上await关键字以确保完全发生异步 *** 作,应该没问题.

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