使用Asp.net C＃中的文件上载将特定字段从.csv导入到SQL Serverl

Question

csv file that has 20 columns,i have uploaded that using FileUpload Control, now i want to add only one column data in database from that 20 columns, how can i achieve this.. my code is-

    DataTable tblReadCSV = new DataTable();
    tblReadCSV.Columns.Add("EmailId");
    string path = System.IO.Path.GetFileName(fupEmails.PostedFile.FileName);
    fupEmails.PostedFile.SaveAs(Server.MapPath("~/Contacts/" + path));
    path = Server.MapPath("~/Contacts/" + path);
    TextFieldParser csvParser = new TextFieldParser(path);
    csvParser.Delimiters = new string[] { "," };
    csvParser.TrimWhiteSpace = true;
    //csvParser.ReadLine();
    while (!csvParser.EndOfData)
    {
        string[] fields = csvParser.ReadFields();
        tblReadCSV.Rows.Add(fields.);
    }
    string connection = @"Data Source=ANURAG-PC; Initial Catalog=MailServer; Persist Security Info=True; User ID=xx; Password=xxxxxx";
    string strSql = "Insert into EmailData(EmailId) Values(@Email)";
    SqlConnection con=new SqlConnection(connection);
    SqlCommand cmd=new SqlCommand();
    cmd.CommandType=CommandType.Text;
    cmd.CommandText=strSql;
    cmd.Connection=con;
    cmd.Parameters.Add("@Email",SqlDbType.NVarChar,250,"EmailId");
    SqlDataAdapter daAdapter=new SqlDataAdapter();
    daAdapter.InsertCommand=cmd;
    int result=daAdapter.Update(tblReadCSV);
    lblError.Text="Send Successfully";

and the problem is in these three lines-

while (!csvParser.EndOfData)
{
    string[] fields = csvParser.ReadFields();
    tblReadCSV.Rows.Add(fields.Equals("Email");
}

here fields contains all the column headings so i just want only one field Email from the whole,how can i achieve this, above lines are not working for this.

Answer 1

You need to create a DataRow that matches the schema of you data table, and then insert the correct value from your parsed line of CSV values into that row, and then add the row to the DataTable . Roughly something like the following

while (!csvParser.EndOfData)
{
    var fields = csvParser.ReadFields();
    var row = tblReadCSV.NewRow();
    row["EmailId"] = fields[ordinalPositionOfEmailField];
    tblReadCSV.Rows.Add(row)
}

Answer 2

Put following line before your while loop

var FirstRowfields = csvParser.ReadFields();
while(!csvParser.EndOfData)
{
  //your code
}

This will read first line and then start your loop will start reading from second line so you will not heading column