Help me please , How to write a loop of data into Database by Linq

my code as below :

private void btnOpenRead_Click(object sender, EventArgs e)
{

try
{
openFileDialog1.FileName = "";
openFileDialog1.Filter = "Text Files(*.txt)|*.txt";


if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
label1.Text = openFileDialog1.FileName;
StreamReader sr = new StreamReader(openFileDialog1.FileName);

ClockRecord = sr.ReadLine();
while (ClockRecord != "")
{
day = ConvertNumber(ClockRecord.Substring(5, 2));
month = ConvertNumber(ClockRecord.Substring(7, 2));
year = ConvertNumber(ClockRecord.Substring(9, 4));
hour = ConvertNumber(ClockRecord.Substring(13, 2));
minute = ConvertNumber(ClockRecord.Substring(15, 2));
dt = new DateTime(year, month, day, hour, minute, 0);

ClockRecord = sr.ReadLine();



}
}


}catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}


static int ConvertNumber(string text)
{
int i;
if(Int32.TryParse(text,out i))
return i;
MessageBox.Show("Invalid data: ", text);
return 0;
}


______________________

I now can separated the string But I don't know how to write to database .

for example I try : (Linq)


Times t = new Times();
t.Emp_Code = ClockRecord.Readline.Substring(5,2);


This will write to database only one record. I don't know how to make a loop . Since do not have line to count .

Expert help me please ..

Pang (Thailand)