C#读取csv格式文件

方法1:用一个System.Web.UI.HtmlControls.HtmlInputFile去handle文件选取

以下是button  click  event中的code,用来执行当文件选取了之后读取文件的内容

System.Web.HttpPostedFile input = Request.Files[0];



if (input != null && input.ContentLength != 0)

{

    string path = input.FileName.ToString();

    System.IO.StreamReader reader = new System.IO.StreamReader(path);



    reader.Peek();

    while (reader.Peek() > 0)

    {

        string str = reader.ReadLine();

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

        if (split[0] != "" && split[1] != "")

        {

            System.Data.DataSet ds = new DataSet();

           System.Data.DataRow dr = ds.Tables[0].NewRow();

            dr[0] = split[0];

            dr[1] = split[1];

            ds.Tables[0].Rows.Add(dr);

        }

    }

} 

方法2:当成SQL的数据表来读取

SELECT  * INTO  theImportTable 
FROM 
 OPENROWSET('MSDASQL', 
 'Driver={Microsoft  Text  Driver  (*.txt;  *.csv)};DEFAULTDIR=D:;Extensions=CSV;', 
 'SELECT  *  FROM  CSVFile.csv')

方法3:文件当做一个数据库读取,使用Ole驱动

int intColCount = 0;

DataTable mydt = new DataTable("myTableName");



DataColumn mydc;

DataRow mydr;



string strpath = "";

string strline;

string[] aryline;



System.IO.StreamReader mysr = new System.IO.StreamReader(strpath);



while ((strline = mysr.ReadLine()) != null)

{

  aryline = strline.Split(new char[] { '|' });



  intColCount = aryline.Length;

  for (int i = 0; i < aryline.Length; i++)

  {

    mydc = new DataColumn(aryline[i]);

    mydt.Columns.Add(mydc);

  }



  mydr = mydt.NewRow();

  for (int i = 0; i < intColCount; i++)

  {

    mydr[i] = aryline[i];

  }

  mydt.Rows.Add(mydr);

} 

  

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