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压缩程序/解压缩程序.Net核心控制台程序中的“System.IO.FileNotFoundException”

console-application compression .net c#

0

meister · 技术社区 · 7 年前

我正在Visual Studio 2017中制作一个压缩器/解压缩器控制台程序,我想通过将输入文件拖动到控制台(.txt)来获取文件路径。

我正在为inputStream for Compress()获取正确的路径,但是outPutStream失败,并且找不到文件路径(FileMode.OpenOrCreate!?!),即使路径是硬编码的。

如果两个变量都是硬编码的,程序就会正确执行,但我不明白为什么System.IO.FileNotFoundException会通过将输入文件拖到控制台并硬编码输出文件而引发。

  ....
 string outPutFileName = @"C:\bla\bla\bla\bla\gergrgr.gzip";        
 public static void Compress(string inPath)
    {


            using (FileStream inputStream = new FileStream(inPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
            {
                using (FileStream outputStream = new FileStream(outPutFileName, FileMode.OpenOrCreate, FileAccess.Write))
                {
                    using (GZipStream gzip = new GZipStream(outputStream, CompressionMode.Compress))
                    {
                        inputStream.CopyTo(gzip);                            
                    }
                }
            }
        }

    static void Main(string[] args)
    {          
        string outPutFileName = @"C:\bla\bla\bla\bla\gergrgr.gzip";

        //dummy var, cant find a better way to add '@' to variable set by console.readline
        string filePath = @"test";

        // info info info....
        Console.WriteLine("Drag in txt file");

        // Takes the path from dragged in file
        string idk = Console.ReadLine();

        // instead of of a loop to escape "/", just replace text in filePath
        filePath = filePath.Replace("test", idk);



        Compress(filePath);  

    }

1 回复 | 直到 7 年前

1

0

Christo 7 年前

我认为问题实际上是你的应用程序没有写入指定输出位置的权限。检查 docs 对于FileMode.OpenOrCreate

以下内容适合我:

using System;
using System.IO;
using System.IO.Compression;

namespace ConsoleApp1
{
    internal class Program
    {
        private static readonly string outPutFileName = @"C:<my desktop directory>\gergrgr.gzip";

        public static void Compress(string inPath)
        {
            using (var inputStream = new FileStream(inPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
            {
                using (var outputStream = new FileStream(outPutFileName, FileMode.OpenOrCreate, FileAccess.Write))
                {
                    using (var gzip = new GZipStream(outputStream, CompressionMode.Compress))
                    {
                        inputStream.CopyTo(gzip);
                    }
                }
            }
        }

        private static void Main(string[] args)
        {
            // info info info....
            Console.WriteLine("Drag in txt file");

            // Takes the path from dragged in file
            var filePath = Console.ReadLine();
            if (!string.IsNullOrEmpty(filePath))
            {
                Compress(filePath.Trim('\\', '"'));
            }
        }
    }
}