using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Cryptography;
using System.Text;
using System.Net.Mail;
using System.Data.SqlClient;
using System.Configuration;
public partial class _Default : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["RCCon"
].ConnectionString); //error
ullreferenceexception was unhandled by user code
SqlCommand cmd;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
setimageurl();
}
}
protected void Timer1_Tick(object sender, EventArgs e)
{
setimageurl();
}
private void setimageurl()
{
if (ViewState["ImageDisplayed"] == null)
{
Image1.ImageUrl = "~/img/1.jpg";
ViewState["ImageDisplayed"] = 1;
}
else
{
int i = (int)ViewState["ImageDisplayed"];
if (i == 8)
{
Image1.ImageUrl = "~/img/1.jpg";
ViewState["ImageDisplayed"] = 1;
}
else
{
i++;
Image1.ImageUrl = "~/img/" + i.ToString() + ".jpg";
ViewState["ImageDisplayed"] = i;
}
}
}
public void Send_Account_Activation_Link(string emailaddress, string act_code)
{
MailMessage mm = new MailMessage("Your EMail ID", emailaddress);
mm.Subject = "Account Activation";
string body = "Hello " + txtusername.Text + ",";
body += "Please click the following link to activate your account";
body += "Click here to activate your account.";
body += "Thanks";
mm.Body = body;
mm.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.Credentials = new System.Net.NetworkCredential("Your Email ID", "");
smtp.EnableSsl = true;
smtp.Send(mm);
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Write("Your Registration Is Successful");
}
protected void Btn_Register_Click(object sender, EventArgs e)
{
string activationCode = Guid.NewGuid().ToString();
string encry_password = Encrypt_Password(txtpassword.Text);
cmd = new SqlCommand("insert into Registration values('" + txtusername.Text.ToLower() + "','" + encry_password + "','" + txtemailid.Text + "','" + activationCode + "','inactive')");
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
Send_Account_Activation_Link(txtemailid.Text, activationCode);
con.Close();
Session["user"] = txtusername.Text;
Response.Redirect("Account_Activation.aspx");
}
private string Encrypt_Password(string password)
{
string pwdstring = string.Empty;
byte[] pwd_encode = new byte[password.Length];
pwd_encode = Encoding.UTF8.GetBytes(password);
pwdstring = Convert.ToBase64String(pwd_encode);
return pwdstring;
}
}
Please help what should I do ???????