how to improve speed of file read write opeartion

how to improve speed of file read write opeartion  when file size is upto 260 kb . 

 

protected void Button1_Click(object sender, EventArgs e)

{

try

{

while (true)

{

//ClientScript.RegisterStartupScript(GetType(), "Alert", "alert('Please wait file is generating');", true);

Dictionary dictionary;

StreamReader file = null;

file = db.ReadFile(out dictionary, TextBox1.Text, file);

if (file == null)

{

dvIsFileExist.Visible = true;

lblIsFileExist.Visible = true;

lblIsFileExist.Text = "Movement File not exist,Please check the file name";

break;

}

List lines = new List();

string line = null;

bool success = false;

while ((line = file.ReadLine()) != null)

{

lines.Add(line);

success = true;

}

var PostingDate = lines[0].Split(new[] { '|' }, StringSplitOptions.None);

if (DateTime.Now.Month == Convert.ToInt32(PostingDate[2].Substring(4, 2)) || DateTime.Now.Month == Convert.ToInt32(PostingDate[3].Substring(4, 2)))

{

dvIsFileExist.Visible = true;

lblIsCurrentMonth.Visible = true;

lblIsCurrentMonth.Text = "This is a current month,Please check";

break;

}

if (success)

{

NewGeneratedFileName = TextBox1.Text.ToString().Substring(0, 8) + DateTime.Now.ToString("ddMMyyHHMMss") + "R";

string filename = dictionary["Archivepath"] + NewGeneratedFileName + ".old";

for (int i = 0; i < lines.Count; i++)

{

var x = lines[i].Split(new[] { '|' }, StringSplitOptions.None);

x[2] = DateTime.Now.ToString("yyyyMMdd");

x[3] = DateTime.Now.ToString("yyyyMMdd");

FileStream fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite);

fs.Seek(0, SeekOrigin.End);

string temp = TextBox1.Text.ToString();

if (temp.Substring(0, 4) == "MV_F")

{

using (StreamWriter sw = new StreamWriter(fs))

{

sw.WriteLine(x[0] + dictionary["Separator"] + x[1] + dictionary["Separator"] + x[2] + dictionary["Separator"] + x[3] + dictionary["Separator"] + x[4] + dictionary["Separator"] + x[5] + dictionary["Separator"] + x[6] + dictionary["Separator"] + x[7] + dictionary["Separator"] + x[8] + dictionary["Separator"] + x[9] + dictionary["Separator"] + x[10] + dictionary["Separator"] + x[11] + dictionary["Separator"] + x[12] + dictionary["Separator"] + x[13] + dictionary["Separator"] + x[14] + dictionary["Separator"] + x[15] + dictionary["Separator"] + x[16] + dictionary["Separator"]);

}

}

else

{

using (StreamWriter sw = new StreamWriter(fs))

{

sw.WriteLine(x[0] + dictionary["Separator"] + x[1] + dictionary["Separator"] + x[2] + dictionary["Separator"] + x[3] + dictionary["Separator"] + x[4] + dictionary["Separator"] + x[5] + dictionary["Separator"] + x[6] + dictionary["Separator"] + x[7] + dictionary["Separator"] + x[8] + dictionary["Separator"] + x[9] + dictionary["Separator"] + x[10] + dictionary["Separator"] + x[11] + dictionary["Separator"] + x[12] + dictionary["Separator"] + x[13] + dictionary["Separator"] + x[14] + dictionary["Separator"] + x[15] + dictionary["Separator"]);

}

}

}

UserName = Session["UserName"].ToString();

FileName = TextBox1.Text.ToString();

Reason = DropDownList1.SelectedValue.ToString();

cmd = new SqlCommand("insert into FileGenerator(FileName,Reason,GeneratedMovementFileName,GeneratedBy,GeneratedDate) output INSERTED.MovementFileID Values('" + FileName + "','" + Reason + "','" + NewGeneratedFileName + "','" + UserName + "',@GeneratedDate)", con);

cmd.Parameters.Add("@GeneratedDate", SqlDbType.DateTime).Value = DateTime.Now;

con.Open();

GRFileID = (int)cmd.ExecuteScalar();

if (GRFileID > 0)

{

IsLogged = db.LogFile(GRFileID, FileName, NewGeneratedFileName, UserName);

}

if (IsLogged)

{

IsSuccess = db.EmailSending(dictionary, NewGeneratedFileName, Reason);

}

if (IsSuccess != 0)

{

ClientScript.RegisterStartupScript(Page.GetType(), "", "alert('File generated successfully');", true);

ClearControl();

}

else

{

ClientScript.RegisterStartupScript(Page.GetType(), "", "alert('There is some problem to generate file,Please contact to administrator');", true);

//ClientScript.RegisterStartupScript(Page.GetType(), "", "alert('There is some problem to generate file,Please contact to administrator');", true);

}

con.Close();

}

else

{

ClientScript.RegisterStartupScript(Page.GetType(), "", "alert('There is some problem to generate file,Please contact to administrator');", true);

}

break;

}

}

catch (Exception ex)

{

string msg = ex.Message.ToString();

ClientScript.RegisterStartupScript(Page.GetType(), "", "alert('There is some problem to generate file,Please contact to administrator');", true);

}

}

void ClearControl()

{

TextBox1.Text = "";

DropDownList1.SelectedValue = "0";

}