Introduction: In this post I will try to explain how we can send the verification Email with link to user after registration in Asp.net.
Here I created a table USER_REGISTRATION. USER_ID is primary key.
USER_ID
|
int
|
USERNAME
|
varchar(50)
|
FIRST_NAME
|
varchar(50)
|
LAST_NAME
|
varchar(50)
|
EMAIL
|
varchar(50)
|
IS_APPROVE
|
bit
|
PASSWORD
|
varchar(50)
|
Add two webforms to project
User_registration.aspx and
Verification.aspx.
Drag and drop the controls from
Toolbox to .aspx page.
<table border="1px solid" width="330px">
<tr><b style="color:Blue;">Send Verification link to User after Registartion</b></tr>
<tr><td>Username:</td><td>
<asp:TextBox ID="txtusername" runat="server"></asp:TextBox></td></tr>
<tr><td>First Name:</td><td>
<asp:TextBox ID="txtfirst" runat="server"></asp:TextBox></td></tr>
<tr><td>Last Name:</td><td>
<asp:TextBox ID="txtlast" runat="server"></asp:TextBox></td></tr>
<tr><td>Email:</td><td>
<asp:TextBox ID="txtemail" runat="server"></asp:TextBox></td></tr>
<tr><td>Password:</td><td>
<asp:TextBox ID="txtpassword" runat="server" TextMode="Password"></asp:TextBox></td></tr>
<tr><td>Confirm Password:</td><td>
<asp:TextBox ID="txtconfirm" runat="server" TextMode="Password"></asp:TextBox></td></tr>
<tr><td> </td><td>
<asp:Button ID="Button1" runat="server" Text="Register" OnClientClick="return ValidateEmail();"
onclick="Button1_Click" /></td></tr>
</table>
Add the below given Javascript between Head Tag to validate the Email Textbox:
<script language="javascript" type="text/javascript">
function ValidateEmail() {
var emailRegex = new RegExp(/^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$/i);
var emailAddress = document.getElementById("<%= txtemail.ClientID %>").value;
var valid = emailRegex.test(emailAddress);
if (!valid) {
alert("Please Enter Valid Email address");
return false;
} else
return true;
}
</script>
Now go to .aspx.cs page and write the below mention code:
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Net.Mail;
using System.Net;
SqlConnection con = newSqlConnection(ConfigurationManager.ConnectionStrings["con"].ToString());
protected void Page_Load(object sender, EventArgs e)
{
if (con.State == ConnectionState.Closed)
{
con.Open();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (IsUsernameEmailExist())
{
Messagebox("Username/Email address already exists. Please try another");
return;
}
if (txtpassword.Text == txtconfirm.Text)
{
SqlCommand cmd = new SqlCommand("insert into USER_REGISTRATION (USERNAME,FIRST_NAME,LAST_NAME,EMAIL,PASSWORD) values(@USERNAME,@FIRST_NAME,@LAST_NAME,@EMAIL,@PASSWORD)", con);
cmd.Parameters.AddWithValue("@USERNAME", txtusername.Text);
cmd.Parameters.AddWithValue("@FIRST_NAME", txtfirst.Text);
cmd.Parameters.AddWithValue("@LAST_NAME", txtlast.Text);
cmd.Parameters.AddWithValue("@EMAIL", txtemail.Text);
cmd.Parameters.AddWithValue("@PASSWORD", txtpassword.Text);
cmd.ExecuteNonQuery();
Sendemail();
Clear();
Messagebox("User Register Successfully");
cmd.Dispose();
}
else
{
Messagebox("Passowrd Not Match");
}
}
public void Sendemail()
{
string ActivationUrl;
try
{
MailMessage message = new MailMessage();
message.From = new MailAddress("demo@gmail.com", "Saklani");
message.To.Add(txtemail.Text);
message.Subject = "Verification Email";
ActivationUrl = Server.HtmlEncode("http://localhost:9525/Important_Testing/Verification.aspx?USER_ID=" + GetUserID(txtemail.Text));
message.Body = "<a href='"+ActivationUrl+"'>Click Here to verify your acount</a>";
message.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.Credentials = new System.Net.NetworkCredential("demo@gmail.com","demo123");
smtp.EnableSsl = true;
smtp.Send(message);
}
catch (Exception ex)
{
}
}
private string GetUserID(string Email)
{
SqlCommand cmd = new SqlCommand("SELECT USER_ID FROM USER_REGISTRATION WHERE EMAIL=@EMAIL", con);
cmd.Parameters.AddWithValue("@EMAIL", txtemail.Text);
string UserID = cmd.ExecuteScalar().ToString();
return UserID;
}
private bool IsUsernameEmailExist()
{
SqlCommand cmd = new SqlCommand("Select * from USER_REGISTRATION where USERNAME='" + txtusername.Text + "' or EMAIL='" + txtemail.Text + "'", con);
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter adp = new SqlDataAdapter(cmd);
adp.Fill(dt);
if (dt.Rows.Count > 0)
{
return true;
}
else
{
return false;
}
}
private void Messagebox(string Message)
{
Label lblMessageBox = new Label();
lblMessageBox.Text =
"<script language='javascript'>" + Environment.NewLine +
"window.alert('" + Message + "')</script>";
Page.Controls.Add(lblMessageBox);
}
public void Clear()
{
txtusername.Text = "";
txtfirst.Text = "";
txtlast.Text = "";
txtemail.Text = "";
txtpassword.Text = "";
txtconfirm.Text = "";
}
In VB (.aspx.vb)
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration
Imports System.Net.Mail
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("con").ToString())
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) HandlesMe.Load
If con.State = ConnectionState.Closed Then
con.Open()
End If
End Sub
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) HandlesButton1.Click
If IsUsernameEmailExist() Then
Messagebox("Username/Email address already exists. Please try another")
Return
End If
If txtpassword.Text = txtconfirm.Text Then
Dim cmd As New SqlCommand("insert into USER_REGISTRATION (USERNAME,FIRST_NAME,LAST_NAME,EMAIL,PASSWORD) values(@USERNAME,@FIRST_NAME,@LAST_NAME,@EMAIL,@PASSWORD)", con)
cmd.Parameters.AddWithValue("@USERNAME", txtusername.Text)
cmd.Parameters.AddWithValue("@FIRST_NAME", txtfirst.Text)
cmd.Parameters.AddWithValue("@LAST_NAME", txtlast.Text)
cmd.Parameters.AddWithValue("@EMAIL", txtemail.Text)
cmd.Parameters.AddWithValue("@PASSWORD", txtpassword.Text)
cmd.ExecuteNonQuery()
Sendemail()
Messagebox("User Register Successfully")
cmd.Dispose()
Else
Messagebox("Passowrd Not Match")
End If
End Sub
Private Function IsUsernameEmailExist() As Boolean
Dim cmd As New SqlCommand(("Select * from USER_REGISTRATION where USERNAME='" + txtusername.Text & "' or EMAIL='") + txtemail.Text & "'", con)
cmd.ExecuteNonQuery()
Dim dt As New DataTable()
Dim adp As New SqlDataAdapter(cmd)
adp.Fill(dt)
If dt.Rows.Count > 0 Then
Return True
Else
Return False
End If
End Function
Private Sub Messagebox(ByVal Message As String)
Dim lblMessageBox As New Label()
lblMessageBox.Text = "<script language='javascript'>" + Environment.NewLine &"window.alert('" & Message & "')</script>"
Page.Controls.Add(lblMessageBox)
End Sub
Public Sub Sendemail()
Dim ActivationUrl As String
Try
Dim message As New MailMessage()
message.From = New MailAddress("demo@gmail.com", "Saklani")
message.[To].Add(txtemail.Text)
message.Subject = "Verification Email"
ActivationUrl = Server.HtmlEncode("http://localhost:9525/Important_Testing/Verification.aspx?USER_ID=" & GetUserID(txtemail.Text))
message.Body = "<a href='" & ActivationUrl & "'>Click Here to verify your acount</a>"
message.IsBodyHtml = True
Dim smtp As New SmtpClient()
smtp.Host = "smtp.gmail.com"
smtp.Port = 587
smtp.Credentials = New System.Net.NetworkCredential("demo@gmail.com", "demo123")
smtp.EnableSsl = True
smtp.Send(message)
Catch ex As Exception
End Try
End Sub
Private Function GetUserID(ByVal Email As String) As String
Dim cmd As New SqlCommand("SELECT USER_ID FROM USER_REGISTRATION WHERE EMAIL=@EMAIL", con)
cmd.Parameters.AddWithValue("@EMAIL", txtemail.Text)
Dim UserID As String = cmd.ExecuteScalar().ToString()
Return UserID
End Function
After that now check the QueryString value on Verification.aspx page. Write the below given code on .aspx.cspage:
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
SqlConnection con = newSqlConnection(ConfigurationManager.ConnectionStrings["con"].ToString());
string USERID, USERNAME;
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["USER_ID"] != null)
{
USERID = Request.QueryString["USER_ID"];
SqlCommand cmd = new SqlCommand("Update USER_REGISTRATION set IS_APPROVE=1 where USER_ID=@USER_ID", con);
cmd.Parameters.AddWithValue("@USER_ID", USERID);
con.Open();
cmd.ExecuteNonQuery();
Response.Write(Request.QueryString["USER_ID"]);
}
}
In VB (.aspx.vb)
Imports System.Data
Imports System.Data.SqlClient
Private con As New SqlConnection(ConfigurationManager.ConnectionStrings("con").ToString())
Private USERID As String, USERNAME As String
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) HandlesMe.Load
If Request.QueryString("USER_ID") IsNot Nothing Then
USERID = Request.QueryString("USER_ID")
Dim cmd As New SqlCommand("Update USER_REGISTRATION set IS_APPROVE=1 where USER_ID=@USER_ID", con)
cmd.Parameters.AddWithValue("@USER_ID", USERID)
con.Open()
cmd.ExecuteNonQuery()
Response.Write(Request.QueryString("USER_ID"))
End If
End Sub
Now run the project and check the result.
