C#

string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=YES;IMEX=1;""", openFileDialog1.FileName);
string query = String.Format("select * from [{0}$]", SheetName);
OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, connectionString);

DataSet ds = new DataSet();

dataAdapter.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];

int row = ds.Tables[0].Rows.Count;
int col = ds.Tables[0].Columns.Count;

for (int i = 0; i < row - 1; i++)
{
  dataGridView1.Rows[i].HeaderCell.Value = ds.Tables[0].Rows[i].ToString(); ;
}

for (int j = 0; j < col - 1; j++)
{
  dataGridView1.Columns[j].HeaderCell.Value = ds.Tables[0].Columns[j].ToString();
}

string username = "username";
string password = "pass";
string commit = "Login";
string postData = string.Format("txtuserid={0}&txtpassword={1}&btnlogin={2}", username, password, commit);

ASCIIEncoding enc = new ASCIIEncoding();

webBrowser1.Navigate("new page.html", "", enc.GetBytes(postData), "Content-Type: application/x-www-form-urlencoded\r\n");

string output = "";
try
    {
//set up and start the process
        Process p = new Process();
        p.StartInfo = new ProcessStartInfo("tasklist");
        p.StartInfo.Arguments = " /v";
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.UseShellExecute = false;
        p.Start();
//clean up the output
        output = (p.StandardOutput.ReadToEnd());
        output = output.Remove(0,453);// the first 453 char values are column headings, spaces and '=' signs
        output = output.Trim();
        output = output.Replace("           ", " ");
        output = output.Replace("          ", " ");
        output = output.Replace("         ", " ");
        output = output.Replace("        ", " ");
        output = output.Replace("       ", " ");
        output = output.Replace("      ", " ");
        output = output.Replace("     ", " ");
        output = output.Replace("    ", " ");
        output = output.Replace("   ", " ");
        output = output.Replace("  ", " ");
        output = output.Replace('\r', ' ');
        output = output.Replace('\n', ' ');
        while (true)// keep it alive
        {
            string[] s = output.Split(' ');
            {
                foreach (string value in s)
                {
                    if (!string.IsNullOrEmpty(value))
                    {
                        Console.WriteLine(value);
                        Console.ReadLine();
                    }
                }
            }
            p.WaitForExit();
        }
         
    }
    catch (Exception se)
    {
        Console.WriteLine(se.Message + output.ToString() + se.InnerException);
        Console.ReadLine();
    }