[Excel] CsvHelper---C#关于CSV文件的导入和导出以及转化 （转载）

点击下载 CsvHelper.rar

这个类是关于Csv文件的一些高级操作
1.DataTable导出到CSV
2.将Csv读入DataTable
看下面代码吧

/// <summary>
/// 联系方式：361983679
/// 更新网站：[url=http://www.cckan.net/thread-655-1-1.html]http://www.cckan.net/thread-655-1-1.html[/url]
/// </summary>
using System.Data;
using System.IO;

namespace DotNet.Utilities
{
    /// <summary>
    /// CSV文件转换类
    /// </summary>
    public static class CsvHelper
    {
        /// <summary>
        /// 导出报表为Csv
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="strFilePath">物理路径</param>
        /// <param name="tableheader">表头</param>
        /// <param name="columname">字段标题,逗号分隔</param>
        public static bool dt2csv(DataTable dt, string strFilePath, string tableheader, string columname)
        {
            try
            {
                string strBufferLine = "";
                StreamWriter strmWriterObj = new StreamWriter(strFilePath, false, System.Text.Encoding.UTF8);
                strmWriterObj.WriteLine(tableheader);
                strmWriterObj.WriteLine(columname);
                for (int i = ; i < dt.Rows.Count; i++)
                {
                    strBufferLine = "";
                    for (int j = ; j < dt.Columns.Count; j++)
                    {
                        if (j > )
                            strBufferLine += ",";
                        strBufferLine += dt.Rows[j].ToString();
                    }
                    strmWriterObj.WriteLine(strBufferLine);
                }
                strmWriterObj.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 将Csv读入DataTable
        /// </summary>
        /// <param name="filePath">csv文件路径</param>
        /// <param name="n">表示第n行是字段title,第n+1行是记录开始</param>
        public static DataTable csv2dt(string filePath, int n, DataTable dt)
        {
            StreamReader reader = new StreamReader(filePath, System.Text.Encoding.UTF8, false);
            int i = , m = ;
            reader.Peek();
            while (reader.Peek() > )
            {
                m = m + ;
                string str = reader.ReadLine();
                if (m >= n + )
                {
                    string[] split = str.Split(',');

                    System.Data.DataRow dr = dt.NewRow();
                    for (i = ; i < split.Length; i++)
                    {
                        dr = split;
                    }
                    dt.Rows.Add(dr);
                }
            }
            return dt;
        }
    }
}