c# - 在 C# 中读取(/写入)文件

Question

我最近想跟踪 HTTPWebRequest 的上传进度。所以我从小处着手，从缓冲读取一个简单的文本文件开始。然后我发现像

这样的简单任务

File.ReadAllText("text.txt");

变成像下面这样的东西，包括所有的流、读者、作者等。或者可以删除一些东西吗？下面的代码也不起作用。也许我做错了什么，假设流不是本地的，那么读取(我想写入将是相似的)到缓冲区的方式是什么，以便我可以跟踪进度。 Web请求

byte[] buffer = new byte[2560]; // 20KB Buffer, btw, how should I decide the buffer size?
int bytesRead = 0, read = 0;
FileStream inStream = new FileStream("./text.txt", FileMode.Open, FileAccess.Read);
MemoryStream outStream = new MemoryStream();
BinaryWriter outWriter = new BinaryWriter(outStream);

// I am getting "Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection."
// inStream.Length = Length = 9335092
// bytesRead = 2560
// buffer.Length = 2560
while ((read = inStream.Read(buffer, bytesRead, buffer.Length)) > 0)
{
    outWriter.Write(buffer);
    //outStream.Write(buffer, bytesRead, buffer.Length);
    bytesRead += read;
    Debug.WriteLine("Progress: " + bytesRead / inStream.Length * 100 + "%");
}
outWriter.Flush();

txtLog.Text = outStream.ToString(); 

更新:解决方案

byte[] buffer = new byte[2560];
int bytesRead = 0, read = 0;
FileStream inStream = File.OpenRead("text.txt");
MemoryStream outStream = new MemoryStream();

while ((read = inStream.Read(buffer, 0, buffer.Length)) > 0)
{
    outStream.Write(buffer, 0, buffer.Length);
    bytesRead += read;
    Debug.WriteLine((double)bytesRead / inStream.Length * 100);
}

inStream.Close();
outStream.Close();

Answer 1

应该是

outWriter.Write(buffer,0,read);