一个解析CSV file的经典函数。曾尝试用odbc直接处理csv文件，发现虽然很好用，但数据量一但大的话会出现许多错误，要解决的问题很多，诸如字符编码问题：必须utf-8→ansi；某些column不显示的问题（绝对妖- -！！！）等。寻遍各大站点，鲜有现成的solution，BB给的在codeproject上的又比较复杂- -！！！，于是自己动手写了一个...方便易用。感觉用起来很爽，故特此拿出来share：

 

public DataSet GetDataSetFromCSV(string filePath, string fileName)
    {
        StreamReader reader = new StreamReader(filePath + "\\" + fileName);
        string str;
        DataTable dt = new DataTable();
        int max_column = 0;
        while ((str = reader.ReadLine()) != null)
        {

            string[] split = str.Split(',');

            int column_num = 0;
            foreach (string unitstr in split)
            {
                column_num = column_num + 1;
            }
            if (column_num > max_column)
            {
                int j = column_num - max_column;
                max_column = column_num;
                while (j != 0)
                {
                    j = j - 1;
                    dt.Columns.Add();
                }
            }
            DataRow dr = dt.NewRow();
            int i = 0;
            foreach (string unitstr in split)
            {
                dr[i] = unitstr;
                i = i + 1;
            }
            dt.Rows.Add(dr);
        }
        DataSet ds = new DataSet();
        ds.Tables.Add(dt);
        return ds;
    }