c# - 从 StreamWriter 获取文件大小

Question

using (var writer = File.CreateText(fullFilePath))
{
   file.Write(fileContent);
}

给定上面的代码，文件大小可以从StreamWriter?

Answer 1

是的，你可以，试试下面的

long length = writer.BaseStream.Length;//will give unexpected output if autoflush is false and write has been called just before

注意：writer.BaseStream.Length属性可能会返回意外结果，因为StreamWriter不会立即写入。它缓存以便获得您需要的预期输出AutoFlush = true

writer.AutoFlush = true; or writer.Flush();
long length = writer.BaseStream.Length;//will give expected output

Answer 2

如果您需要特定文件的属性，我认为您正在寻找的是 FileInfo。

FileInfo info = new FileInfo(fullFilePath);
//Gets the size, in bytes, of the current file.
long size = info.Length;

Answer 3

干得好！只需使用 System.IO 命名空间中的 FileInfo 类 :)

using System.IO;

var fullFilePath = "C:\path\to\some\file.txt";
var fileInfo = new FileInfo(fullFilePath);

Console.WriteLine("The size of the file is: " + fileInfo.Length);

Answer 4

你能试试这段代码吗？

var size = writer.BaseStream.Length;

*writer 是你的 StreamWriter

Answer 5

不，不是从 StreamWriter 本身，您可以了解文件的大小。您必须使用FileInfo 的 Length。