C#合并文件夹中所有的txt文本文件

一时失言乱红尘 2022-07-15 02:37 350阅读 0赞

方法一：

缺点：不支持中文，如果txt不是utf8编码，包含中文时会乱码

static void Main(string[] args)
            {
    
                string[] txtFiles = Directory.GetFiles(System.Environment.CurrentDirectory, "*.txt");
                using (StreamWriter writer = new StreamWriter(System.Environment.CurrentDirectory + @"\allfiles.txt"))
                {
                    for (int i = 0; i < txtFiles.Length; i++)
                    {
                        using (StreamReader reader = File.OpenText(txtFiles[i]))
                        {
                            writer.Write(reader.ReadToEnd());
                        }
                    }
                }
    
    
            }

方法二：改进后的方法（支持中文）：

static void Main(string[] args)
            {
    
                string[] txtFiles= Directory.GetFiles(System.Environment.CurrentDirectory, "*.txt");
                FileCombine c = new FileCombine();
                c.CombineFile(txtFiles, System.Environment.CurrentDirectory + @"\allfiles.txt");
    
            }
    
            class FileCombine
            {
                public void CombineFile(String[] infileName, String outfileName)
                {
                    int b;
                    int n = infileName.Length;
                    FileStream[] fileIn = new FileStream[n];
                    using (FileStream fileOut = new FileStream(outfileName, FileMode.Create))
                    {
                        for (int i = 0; i < n; i++)
                        {
                            try
                            {
                                fileIn[i] = new FileStream(infileName[i], FileMode.Open);
                                while ((b = fileIn[i].ReadByte()) != -1)
                                    fileOut.WriteByte((byte)b);
                            }
                            catch (System.Exception ex)
                            {
                                Console.WriteLine(ex.Message);
                            }
                            finally
                            {
                                fileIn[i].Close();
                            }
    
                        }
                    }
                }
            }