public void isExistingAccount()
{
try
{
string ReturnValue = "false";
try
{
IList <NguoiDung> listNguoiDung = new NguoiDungManagement().getNguoiDung(" where TenDangNhap=N'" + Request.QueryString["tenDangNhap"].ToString() + "'");
if (listNguoiDung.Count > 0)
{
ReturnValue = "true";
}
}
catch (Exception ex)
{
}
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = "application/json; charset=utf-8";
String resultResponse = "{\"Result\":" + ReturnValue + "}";
HttpContext.Current.Response.Write(resultResponse);
HttpContext.Current.Response.End();
}
catch (Exception ex)
{
//HttpContext.Current.Response.Write("err: " + ex.ToString());
return;
}
}