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public partial class _Default : System.Web.UI.Page
{
bool isRun = false;

protected void Page_Load(object sender, EventArgs e)
{

}

private void DoWork()
{
HttpContext.Current.Response.BufferOutput = false;
while (isRun)
{
StreamReader sr = new StreamReader(@"I:\test.txt");
TextBox1.Text = sr.ReadToEnd();
sr.Close();

Thread.Sleep(1000);

}
}

protected void Button1_Click(object sender, EventArgs e)
{
isRun = true;
DoWork();
}

protected void Button2_Click(object sender, EventArgs e)
{
isRun = false;
}
}




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var pwd=document.all.txtOpwd;

var div1=document.getElementById("divPwd");

if (pwd.value=="")
{
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protected void btnLogin_Click(object sender, EventArgs e)
  {
  SqlConnection conn = new SqlConnection("Server = (local);user id = sa;pwd = 1;database = Login");
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