Create Login Page Form Example In Asp.Net

This example shows how to Create Login Page Form In Asp.Net Using C# And VB.NET.

To create Login Page Example, i have added a new form and placed 2 textbox and one button on it.

RequiredFieldValidators are associated to respective textboxes to ensure they are not blank.

TextMode property of password textbox is set so that it displays * instead of letters.

We can also Login Control with membership provider database to create login page.

I have used a table called users to check username and password, schema is shown below.

You can use User Registration Form In Sign Up hyperlink and Forgot Password Page to retrieve password by email.

HTML SOURCE OF PAGE

---

<form id="Form1" runat="server">

<fieldset>

<legend>Login</legend> 

<div class='container'>

<asp:Label ID="Name" runat="server" Text="UserName:" CssClass="lbl"/>

<br/>

<asp:TextBox ID="txtUserName" runat="server" Height="22px"/>

<asp:RequiredFieldValidator ID="RV1" runat="server" 

                            ControlToValidate="txtUserName" 

                            ErrorMessage="Please Enter User Name" 

                            SetFocusOnError="True">*

</asp:RequiredFieldValidator><br />

</div>

<div class='container'>

<asp:Label ID="lblPwd" runat="server" Text="Password:" CssClass="lbl"/>

<br/>

<asp:TextBox ID="txtPwd" runat="server" TextMode="Password" 

                         CssClass="pwd" Height="22px"/>

<asp:RequiredFieldValidator ID="RV2" runat="server" 

                            ControlToValidate="txtPwd" 

                            ErrorMessage="Your Password" 

                            SetFocusOnError="True">*

</asp:RequiredFieldValidator><br />

</div>

<div class='container'>

<asp:Button ID="btnLogIn" runat="server" Text="Sign In" 

                          onclick="btnLogIn_Click"/>

</div>

<div class='container'>

<asp:HyperLink ID="HyperLink1" runat="server" 

NavigateUrl="~/ForgotPassword.aspx">Forgot Password ?</asp:HyperLink>

<br/>

</div>

<div class='short_explanation'>New User ? 

<asp:HyperLink ID="HyperLink2" runat="server" 

NavigateUrl="~/Default.aspx">SignUp !</asp:HyperLink></div>                       

<asp:ValidationSummary ID="ValidationSummary1" 

                       runat="server" CssClass="error"/>

<br /><br />

<asp:Label ID="lblMsg" runat="server" Text="" CssClass="lbl"/>

</fieldset>

</form>

Write following code in Click Event of Log In Button.

C#

---

protected void btnLogIn_Click(object sender, EventArgs e)
    {
        //Create Connection String And SQL Statement
        string strCon = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        string strSelect = "SELECT COUNT(*) FROM Users WHERE UserName = @Username AND Password = @Password";

        SqlConnection con = new SqlConnection(strCon);
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandType = CommandType.Text;
        cmd.CommandText = strSelect;

        SqlParameter username = new SqlParameter("@Username", SqlDbType.VarChar, 50);
        username.Value = txtUserName.Text.Trim().ToString();
        cmd.Parameters.Add(username);

        SqlParameter password = new SqlParameter("@Password", SqlDbType.VarChar, 50);
        password.Value = txtPwd.Text.Trim().ToString();
        cmd.Parameters.Add(password);

        con.Open();
        int result = (Int32)cmd.ExecuteScalar();
        con.Close();

        if (result >= 1)
        {
            Response.Redirect("UpdateProfile.aspx");
        }
        else
            lblMsg.Text = "Incorrect Username or Password";
        
    }

VB.NET

---

Protected Sub btnLogIn_Click(sender As Object, e As EventArgs)
 'Create Connection String And SQL Statement
 Dim strCon As String = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString
 Dim strSelect As String = "SELECT COUNT(*) FROM Users WHERE UserName = @Username AND Password = @Password"

 Dim con As New SqlConnection(strCon)
 Dim cmd As New SqlCommand()
 cmd.Connection = con
 cmd.CommandType = CommandType.Text
 cmd.CommandText = strSelect

 Dim username As New SqlParameter("@Username", SqlDbType.VarChar, 50)
 username.Value = txtUserName.Text.Trim().ToString()
 cmd.Parameters.Add(username)

 Dim password As New SqlParameter("@Password", SqlDbType.VarChar, 50)
 password.Value = txtPwd.Text.Trim().ToString()
 cmd.Parameters.Add(password)

 con.Open()
 Dim result As Integer = DirectCast(cmd.ExecuteScalar(), Int32)
 con.Close()

 If result >= 1 Then
  Response.Redirect("UpdateProfile.aspx")
 Else
  lblMsg.Text = "Incorrect Username or Password"
 End If

End Sub

We can further use Forms Authentication to anonymous access to site.

Download Sample Code

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