Question

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

鉴于上述代码，可以从StreamWriter获知文件大小吗？

Answer 1

是的，您可以尝试以下

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属性可以返回意外结果，因为StreamWriter不会立即写入。它会缓存以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

你走了！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

你可以试试这段代码吗？

var size = writer.BaseStream.Length;

* writer是您的StreamWriter

Answer 5

不，不是从StreamWriter本身可以找到文件的大小。您必须使用FileInfo's Length。

从StreamWriter获取文件大小

5 个答案: