In this article I will explain how to build a simple user registration form that will allow user register to the website in ASP.Net using C# and VB.Net.
User will fill up the registration form with details such as username, password, email address, etc. and these details will be saved in the database table.
The registration form will also make sure that duplicate username and email addresses are not saved by verifying whether username and email address must not exists in the table.
Database
For this article I have created a new database named LoginDB which contains the following table named Users in it.
![Simple User Registration Form Example in ASP.Net]()
In the above table column UserId is set as primary key and it Identity property is set to true.
Note: The SQL for creating the database is provided in the attached sample code.
HTML Markup
The HTML Markup consists of some TextBox, their corresponding Validators and a Button. Other than RequiredField Validators there’s a CompareValidator to compare passwords and a RegularExpressionValidator to validate email address.
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<th colspan="3">
Registration
</th>
</tr>
<tr>
<td>
Username
</td>
<td>
<asp:TextBox ID="txtUsername" runat="server" />
</td>
<td>
<asp:RequiredFieldValidator ErrorMessage="Required" ForeColor="Red" ControlToValidate="txtUsername"
runat="server" />
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<asp:TextBox ID="txtPassword" runat="server" TextMode="Password" />
</td>
<td>
<asp:RequiredFieldValidator ErrorMessage="Required" ForeColor="Red" ControlToValidate="txtPassword"
runat="server" />
</td>
</tr>
<tr>
<td>
Confirm Password
</td>
<td>
<asp:TextBox ID="txtConfirmPassword" runat="server" TextMode="Password" />
</td>
<td>
<asp:CompareValidator ErrorMessage="Passwords do not match." ForeColor="Red" ControlToCompare="txtPassword"
ControlToValidate="txtConfirmPassword" runat="server" />
</td>
</tr>
<tr>
<td>
Email
</td>
<td>
<asp:TextBox ID="txtEmail" runat="server" />
</td>
<td>
<asp:RequiredFieldValidator ErrorMessage="Required" Display="Dynamic" ForeColor="Red"
ControlToValidate="txtEmail" runat="server" />
<asp:RegularExpressionValidator runat="server" Display="Dynamic" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"
ControlToValidate="txtEmail" ForeColor="Red" ErrorMessage="Invalid email address." />
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button Text="Submit" runat="server" OnClick="RegisterUser" />
</td>
<td>
</td>
</tr>
</table>
![Simple User Registration Form Example in ASP.Net]()
![Simple User Registration Form Example in ASP.Net]()
Stored Procedure to insert the User details
The following stored procedure is used to insert the user details such as username, password and email address.
The stored procedure first checks whether the username supplied already exists, if yes then it will return negative 1 value.
Then the stored procedure checks whether the email address supplied already exists, if yes then it will return negative 2 value.
If both username and email address are valid then the record will be inserted and the auto-generated UserId will be returned by the stored procedure.
CREATE PROCEDURE [dbo].[Insert_User]
@Username NVARCHAR(20),
@Password NVARCHAR(20),
@Email NVARCHAR(30)
AS
BEGIN
SET NOCOUNT ON;
IF EXISTS(SELECT UserId FROM Users WHERE Username = @Username)
BEGIN
SELECT -1 -- Username exists.
END
ELSE IF EXISTS(SELECT UserId FROM Users WHERE Email = @Email)
BEGIN
SELECT -2 -- Email exists.
END
ELSE
BEGIN
INSERT INTO [Users]
([Username]
,[Password]
,[Email]
,[CreatedDate])
VALUES
(@Username
,@Password
,@Email
,GETDATE())
SELECT SCOPE_IDENTITY() -- UserId
END
END
Namespaces
You will need to import the following namespaces.
C#
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
VB.Net
Imports System.Data
Imports System.Configuration
Imports System.Data.SqlClient
Inserting the User Details
The following event handler is raised when the submit button is clicked, here the values from the Registration Form’s TextBoxes are passed to the stored procedure and the stored procedure is executed.
The return value from the stored procedure is captured in a variable and then based on its value appropriate message is displayed using JavaScript Alert message box.
C#
protected void RegisterUser(object sender, EventArgs e)
{
int userId = 0;
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("Insert_User"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@Username", txtUsername.Text.Trim());
cmd.Parameters.AddWithValue("@Password", txtPassword.Text.Trim());
cmd.Parameters.AddWithValue("@Email", txtEmail.Text.Trim());
cmd.Connection = con;
con.Open();
userId = Convert.ToInt32(cmd.ExecuteScalar());
con.Close();
}
}
string message = string.Empty;
switch (userId)
{
case -1:
message = "Username already exists.\\nPlease choose a different username.";
break;
case -2:
message = "Supplied email address has already been used.";
break;
default:
message = "Registration successful.\\nUser Id: " + userId.ToString();
break;
}
ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" + message + "');", true);
}
}
VB.Net
Protected Sub RegisterUser(sender As Object, e As EventArgs)
Dim userId As Integer = 0
Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As New SqlConnection(constr)
Using cmd As New SqlCommand("Insert_User")
Using sda As New SqlDataAdapter()
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.AddWithValue("@Username", txtUsername.Text.Trim())
cmd.Parameters.AddWithValue("@Password", txtPassword.Text.Trim())
cmd.Parameters.AddWithValue("@Email", txtEmail.Text.Trim())
cmd.Connection = con
con.Open()
userId = Convert.ToInt32(cmd.ExecuteScalar())
con.Close()
End Using
End Using
Dim message As String = String.Empty
Select Case userId
Case -1
message = "Username already exists.\nPlease choose a different username."
Exit Select
Case -2
message = "Supplied email address has already been used."
Exit Select
Case Else
message = "Registration successful.\nUser Id: " + userId.ToString()
Exit Select
End Select
ClientScript.RegisterStartupScript([GetType](), "alert", (Convert.ToString("alert('") & message) + "');", True)
End Using
End Sub
Message Box when registration is successful
![Simple User Registration Form Example in ASP.Net]()
Message Box when username already exists
![Simple User Registration Form Example in ASP.Net]()
Message Box when email address already exists
![Simple User Registration Form Example in ASP.Net]()
User record inserted in table
![Simple User Registration Form Example in ASP.Net]()
Downloads
