System.IO.MemoryStream的stream.Position = 0

最新推荐文章于 2025-03-25 22:00:00 发布

原创最新推荐文章于 2025-03-25 22:00:00 发布 · 5k 阅读

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文章标签：

#buffer #object #byte #stream #null #file

本文解决了一个关于使用System.IO.MemoryStream时出现的问题，即忘记设置stream.Position=0;导致数据读写异常的情况。通过对比错误代码与修复后的正确代码，详细说明了如何避免此类错误。

//怎么读也读不出来的代码

public override object Execute(object parameter)
        {
            using (System.IO.MemoryStream stream = parameter as System.IO.MemoryStream)
            {
                using (System.IO.BinaryWriter writer = new System.IO.BinaryWriter(System.IO.File.OpenWrite(File)))
                {
                    byte[] BUFFER = new byte[stream.Length];
                    stream.Read(BUFFER, 0, (int)stream.Length);
                    stream.Flush();
                    writer.Write(BUFFER, 0, (int)stream.Length);
                    writer.Flush();
                    stream.Close();
                    writer.Close();
                }
            }
            return null;
        }

//运行正常的代码

public override object Execute(object parameter)
        {
            using (System.IO.MemoryStream stream = parameter as System.IO.MemoryStream)
            {
                using (System.IO.BinaryWriter writer = new System.IO.BinaryWriter(System.IO.File.OpenWrite(File)))
                {
                    stream.Position = 0;
                    byte[] BUFFER = new byte[stream.Length];
                    stream.Read(BUFFER, 0, (int)stream.Length);
                    stream.Flush();
                    writer.Write(BUFFER, 0, (int)stream.Length);
                    writer.Flush();
                    stream.Close();
                    writer.Close();
                }
            }
            return null;
        }

//stream.Position = 0;耽误了我的4个小时