c#文件操作xml、ini、txt、excel、csv操作全解

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using System.Xml;
using System.Data;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace util
{
    public class filedeal
    {

        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

        /// <summary>
        /// 读取ini
        /// </summary>
        /// <param name="group">数据分组</param>
        /// <param name="key">关键字</param>
        /// <param name="filepath">init文件地址</param>
        /// <returns>关键字对应的值，没有时含有默认值</returns>
        public static string readini(string group,string key,string filepath){
            StringBuilder temp = new StringBuilder();
            GetPrivateProfileString(group,key, "", temp, 255, filepath);
            return temp.ToString();
        }

        /// <summary>
        /// 存储ini
        /// </summary>
        /// <param name="group">数据分组</param>
        /// <param name="key">关键字</param>
        /// <param name="value">关键字对应的值</param>
        /// <param name="filepath">ini文件地址</param>
        public static void writeini(string group,string key,string value,string filepath)
        {
            WritePrivateProfileString(group, key, value, filepath);
        }

        //读取txt成字符串
        public static string readtxt(string path)
        {
            StreamReader sr = new StreamReader(path, Encoding.Default);
            string line;
            StringBuilder sb = new StringBuilder();
            while ((line = sr.ReadLine()) != null)
            {
                sb.Append(line);
            }
            return sb.ToString();
        }
        //读取txt成字符串列表
        public static List<string> readtxt(string path)
        {
            List<string> allstr = new List<string>();
            StreamReader sr = new StreamReader(path, Encoding.Default);
            string line;
            while ((line = sr.ReadLine()) != null)
            {
                allstr.Add(line);
            }
            return allstr;
        }
        //写入txt字符串
        public static void writetxt(string path, string content)
        {
            FileStream fs = new FileStream(path, FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            //开始写入
            sw.Flush();
            //关闭流
            sw.Close();
            fs.Close();
        }


        //导出到execl，需要导入Microsoft.Office.Interop.Excel
        public static void ListToExcel(List<String> strarray,string name,string path)
        {
            System.Data.DataTable dt = new System.Data.DataTable();
            dt.Columns.Add(name, System.Type.GetType("System.String"));
            foreach ( String str in strarray)
            {
                DataRow dr = dt.NewRow();
                dr[0] = str;
                dt.Rows.Add(dr);
            }
            DataTabletoExcel(dt, path);

        }
        //导出到excel，需要导入Microsoft.Office.Interop.Excel
        public static bool DataTabletoExcel(System.Data.DataTable dt, string AbosultedFilePath)
        {
            if (dt == null)
                return false;

            Microsoft.Office.Interop.Excel.Application excApp = new Microsoft.Office.Interop.Excel.Application();
            if (excApp==null)
            {
                MessageBox.Show("无法创建excel对象，可能您的电脑未安装excel");
                return false;
            }
            Microsoft.Office.Interop.Excel.Workbook workBook = excApp.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
            Microsoft.Office.Interop.Excel.Worksheet workSeet = workBook.Worksheets[1]; //取得sheet1
            Microsoft.Office.Interop.Excel.Range range = null;
            int tableCount = dt.Rows.Count;
            int rowRead = 0;
            float percent = 0;
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                workSeet.Cells[1, i + 1] = dt.Columns[i].ColumnName;

                //设置标题的样式
                range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[1, i + 1];
                range.Font.Bold = true; //粗体
                range.Font.Size = "12";//字体大小
                range.Font.Name = "宋体";
                range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //居中
                range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //背景色
                range.EntireColumn.AutoFit(); //自动设置列宽
                range.EntireRow.AutoFit(); //自动设置行高
            }
            for (int r = 0; r < dt.Rows.Count; r++)
            {
                for (int c = 0; c < dt.Columns.Count; c++)
                {
                    //写入内容
                    workSeet.Cells[r + 2, c + 1] = "'" + dt.Rows[r][c].ToString();
                    //设置样式
                    range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[r + 2, c + 1];
                    range.Font.Size = 9; //字体大小
                    range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //加边框
                    range.EntireColumn.AutoFit(); //自动调整列宽
                }
                rowRead++;
                percent = ((float)(100 * rowRead)) / tableCount;
                System.Windows.Forms.Application.DoEvents();
            }
            range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
            if (dt.Columns.Count > 1)
            {
                range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
            }
            try
            {
                workBook.Saved = true;
                workBook.SaveCopyAs(AbosultedFilePath);
            }
            catch { }
            workBook.Close();
            if (excApp != null)
            {
                excApp.Workbooks.Close();
                excApp.Quit();
                int generation = System.GC.GetGeneration(excApp);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(excApp);
                excApp = null;
                System.GC.Collect(generation);
            }
            GC.Collect(); //强行销毁
            #region 强行杀死最近打开的Excel进程
            System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
            System.DateTime startTime = new DateTime();
            int m, killID = 0;
            for (m = 0; m < excelProc.Length; m++)
            {
                if (startTime < excelProc[m].StartTime)
                {
                    startTime = excelProc[m].StartTime;
                    killID = m;
                }
            }
            if (excelProc[killID].HasExited == false)
            {
                excelProc[killID].Kill();
            }
            #endregion
            return true;

        }


        //导出到csv文件
        public static void DataTabletocsv(System.Data.DataTable dt, string AbosultedFilePath)
        {
            //MessageBox.Show(AbosultedFilePath);
            System.IO.FileStream fs = new FileStream(AbosultedFilePath, System.IO.FileMode.Create, System.IO.FileAccess.Write);
            StreamWriter sw = new StreamWriter(fs, new System.Text.UnicodeEncoding());
            //Tabel header
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                sw.Write(dt.Columns[i].ColumnName);
                sw.Write("\t");
            }
            sw.WriteLine("");
            //Table body
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    sw.Write(DelQuota(dt.Rows[i][j].ToString()));
                    sw.Write("\t");
                }
                sw.WriteLine("");
            }
            sw.Flush();
            sw.Close();


        }
        //导入CSV文件
        public static System.Data.DataTable OpenCSV(string fileName)
        {
            System.Data.DataTable dt = new System.Data.DataTable();
            FileStream fs = new FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            StreamReader sr = new StreamReader(fs, System.Text.Encoding.Default);
            //记录每次读取的一行记录
            string strLine = "";
            //记录每行记录中的各字段内容
            string[] aryLine;
            //标示列数
            int columnCount = 0;
            //标示是否是读取的第一行
            bool IsFirst = true;

            //逐行读取CSV中的数据
            while ((strLine = sr.ReadLine()) != null)
            {
                aryLine = strLine.Split(',');
                if (IsFirst == true)
                {
                    IsFirst = false;
                    columnCount = aryLine.Length;
                    //创建列
                    for (int i = 0; i < columnCount; i++)
                    {
                        DataColumn dc = new DataColumn(aryLine[i]);
                        dt.Columns.Add(dc);
                    }
                }
                else
                {
                    DataRow dr = dt.NewRow();
                    for (int j = 0; j < columnCount; j++)
                    {
                        dr[j] = aryLine[j];
                    }
                    dt.Rows.Add(dr);
                }
            }

            sr.Close();
            fs.Close();
            return dt;
        }

        public static string DelQuota(string str)
        {
            string result = str;
            string[] strQuota = { "~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "`", ";", "'", ",", ".", "/", ":", "/,", "<", ">", "?" };
            for (int i = 0; i < strQuota.Length; i++)
            {
                if (result.IndexOf(strQuota[i]) > -1)
                    result = result.Replace(strQuota[i], "");
            }
            return result;
        }

 
    }
}