文本文件處理封裝類源代碼

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.IO;

namespace MyQuery.Utils
{
    /// <summary>
    /// 封裝Txt文件處理
    /// by 賈世義 2011-5-27
    /// </summary>
    public static class TxtHelper
    {
        /// <summary>
        /// 加載txt數據到DataSet
        /// </summary>
        /// <param name="fileName">完整路徑txt文件名 以.txt為後綴</param>
        /// <param name="encoding">字符類型 默認GBK</param>
        /// <param name="split">分割字符</param>
        /// <param name="isFirstTitle">首行是否為標題行</param>
        /// <returns></returns>
        public static DataSet GetDataFromTxt(string fileName, string encoding, char split, bool isFirstTitle)
        {
            DataSet ds = null;
            if (IsTxtFile(fileName) && File.Exists(fileName))
            {
                DataTable dt = new DataTable();
                Encoding ecode;
                if (String.IsNullOrEmpty(encoding))
                {
                    ecode = Encoding.GetEncoding("GBK");
                }
                else
                {
                    ecode = Encoding.GetEncoding(encoding);
                }
                int i = 0;
                string[] lines = File.ReadAllLines(fileName, ecode);
                foreach (string line in lines)
                {
                    string[] options = DataHelper.GetStrings(line, split);
                    if (options != null)
                    {
                        //列
                        if (i == 0)
                        {
                            for (int j = 0; j < options.Length; j++)
                            {
                                string n = null;
                                if (isFirstTitle)
                                {
                                    n = options[j];
                                }
                                if (String.IsNullOrEmpty(n))
                                {
                                    n = j.ToString();
                                }
                                dt.Columns.Add(n);
                            }
                            i = 1;
                            if (isFirstTitle)
                            {
                                continue;
                            }
                        }
                        else if (options.Length > dt.Columns.Count)
                        {
                            for (int j = 0; j < options.Length - dt.Columns.Count; j++)
                            {
                                dt.Columns.Add(dt.Columns.Count.ToString());
                            }
                        }
                        //數據
                        DataRow dr = dt.NewRow();
                        for (int j = 0; j < options.Length; j++)
                        {
                            dr[j] = options[j];
                        }
                        dt.Rows.Add(dr);
                    }
                }
                if (dt.Rows.Count > 0)
                {
                    ds = new DataSet();
                    ds.Tables.Add(dt);
                }
            }
            return ds;
        }

        /// <summary>
        /// 是否為Txt讀取支持的後綴類型
        /// </summary>
        /// <param name="fileName">文件名</param>
        /// <returns></returns>
        public static bool IsTxtFile(string fileName)
        {
            return !String.IsNullOrEmpty(fileName) &&
                    (fileName.EndsWith(".txt", StringComparison.CurrentCultureIgnoreCase)
                    || fileName.EndsWith(".csv", StringComparison.CurrentCultureIgnoreCase));
        }
        /// <summary>
        /// 讀取文本
        /// </summary>
        /// <param name="fileName">完整文件名</param>
        /// <returns></returns>
        public static string GetString(string fileName)
        {
            string result = null;
            if (File.Exists(fileName))
            {
                result = File.ReadAllText(fileName, Encoding.UTF8);
            }
            return result;
        }
        /// <summary>
        /// 將文本寫入文本文件
        /// </summary>
        /// <param name="name">完整文件名</param>
        /// <param name="content">內容</param>
        /// <param name="isCover">是否覆蓋存在文件</param>
        public static void WriteToFile(string name, string content, bool isCover)
        {
            FileStream fs = null;
            try
            {
                if (!isCover && File.Exists(name))
                {
                    fs = new FileStream(name, FileMode.Append, FileAccess.Write);
                    StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);
                    sw.WriteLine(content);
                    sw.Flush();
                    sw.Close();
                }
                else
                {
                    File.WriteAllText(name, content, Encoding.UTF8);
                }
            }
            finally
            {
                if (fs != null)
                {
                    fs.Close();
                }
            }

        }
    }
}

作者“賈世義”