读CSV转换datatable

Posted 2021-01-05 qiu18359243869

using System.Data;

using System.IO;

 

/// <summary>

/// Stream读取.csv文件

/// </summary>

/// <param name="filePath">文件路径</param>

/// <returns></returns>

public static DataTable OpenCSV(string filePath)

{

    DataTable dt = new DataTable();

    FileStream fs = new FileStream(filePath, FileMode.Open, 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;

            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;

}