E.S Arts and Science College - ASP.NET Practical Programs

1. CREATE AN EXPOSURE OF WEB APPLICATION AND TOOLS

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs"
Inherits="EX1.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Font-Size="Large"></asp:Label>
    </div>
    </form>
</body>
</html>

WebForm1.aspx.cs (Code Behind)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace EX1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Label1.Text = DateTime.Now.ToString("dd/MM/yyyy");
        }
    }
}

Expected Output:

2. IMPLEMENT THE HTML CONTROLS

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs"
Inherits="program_2_html_controls.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        .style1 { width: 100%; }
        .style2 { height: 26px; }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table class="style1">
            <tr>
                <td>Name:</td>
                <td>
                    <asp:TextBox ID="txtname" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>Street:</td>
                <td>
                    <asp:TextBox ID="txtstreet" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>City:</td>
                <td>
                    <asp:TextBox ID="txtcity" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>State:</td>
                <td>
                    <asp:TextBox ID="txtstate" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td class="style2"></td>
                <td class="style2"></td>
            </tr>
            <tr>
                <td>&nbsp;</td>
                <td id="displayrow" runat="server">&nbsp;</td>
            </tr>
        </table>
    </div>
    <asp:Button ID="btnclick" runat="server" Text="Click" OnClick="btnclick_click" />
    <p>
        <asp:Label ID="lbldisplay" runat="server"></asp:Label>
    </p>
    </form>
</body>
</html>

WebForm1.aspx.cs (Code Behind)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace program_2_html_controls
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btnclick_click(object sender, EventArgs e)
        {
            string str = "";
            str += txtname.Text + "<br />";
            str += txtstreet.Text + "<br />";
            str += txtcity.Text + "<br />";
            str += txtstate.Text + "<br />";
            displayrow.InnerHtml = str;
        }
    }
}

Expected Output:

Name:
Street:
City:
State:

3. IMPLEMENT THE SERVER CONTROLS

Default.aspx

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master"
AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="server_controls._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <p>
        <br />
        <asp:Label ID="lblname" runat="server" Text="Enter your name"></asp:Label>
        <asp:TextBox ID="txtname" runat="server"></asp:TextBox>
    </p>
    <p>
        <asp:Button ID="btnsubmit" runat="server" Text="Greet me"
            onclick="btnsubmit_Click" />
        <asp:Label ID="lblgreeting" runat="server"></asp:Label>
    </p>
</asp:Content>

Default.aspx.cs (Code Behind)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace server_controls
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btnsubmit_Click(object sender, EventArgs e)
        {
            lblgreeting.Text = "Hello, " + txtname.Text + "!";
        }
    }
}

Expected Output:

Enter your name

5. WEB APPLICATION USING LIST CONTROLS

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs"
Inherits="program_5_list_controls.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Label ID="lbllanguage" runat="server"
            Text="Select your programming language:"></asp:Label>
        <br />
        <asp:DropDownList ID="ddllanguage" runat="server">
            <asp:ListItem>Python</asp:ListItem>
            <asp:ListItem>Java</asp:ListItem>
            <asp:ListItem>C++</asp:ListItem>
        </asp:DropDownList>
        <br /><br />

        <asp:Label ID="lblhobbies" runat="server" Text="Select your hobbies:"></asp:Label>
        <br />
        <asp:CheckBoxList ID="cblhobbies" runat="server">
            <asp:ListItem>reading</asp:ListItem>
            <asp:ListItem>gaming</asp:ListItem>
            <asp:ListItem>traveling</asp:ListItem>
        </asp:CheckBoxList>
        <br />

        <asp:Label ID="lblcompany" runat="server" Text="Select your country:"></asp:Label>
        <asp:RadioButtonList ID="rblcountry" runat="server">
            <asp:ListItem>India</asp:ListItem>
            <asp:ListItem>USA</asp:ListItem>
            <asp:ListItem>UK</asp:ListItem>
        </asp:RadioButtonList>

        <asp:Button ID="btnsubmit" runat="server" onclick="btnsubmit_Click"
            Text="Submit" />
        <p>
            <asp:Label ID="lblresult" runat="server"></asp:Label>
        </p>
    </form>
</body>
</html>

WebForm1.aspx.cs (Code Behind)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace program_5_list_controls
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btnsubmit_Click(object sender, EventArgs e)
        {
            String selectedLanguage = ddllanguage.SelectedItem.Text.Trim();
            String selectedHobbies = "";

            foreach (ListItem item in cblhobbies.Items)
            {
                if (item.Selected)
                {
                    selectedHobbies += item.Text.Trim() + ", ";
                }
            }

            if (selectedHobbies.EndsWith(", "))
            {
                selectedHobbies = selectedHobbies.Substring(0, selectedHobbies.Length - 2);
            }

            String selectedCountry = rblcountry.SelectedItem != null ?
                rblcountry.SelectedItem.Text.Trim() : "Not selected";

            lblresult.Text = "<b>Selected programming language:</b> " + selectedLanguage + "<br/>" +
                "<b>Selected Hobbies:</b> " + selectedHobbies + "<br/>" +
                "<b>Selected country:</b> " + selectedCountry;
        }
    }
}

Expected Output:

Select your programming language:

Select your hobbies:

reading
gaming
traveling

Select your country:

India
USA
UK

6. WEB PAGE DESIGN RICH CONTROLS USING VALIDATION CONTROLS WITH FILE CONCEPT

WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs"
Inherits="program_6_rich_controls.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="lblName" runat="server" Text="Name:"></asp:Label>
        <asp:TextBox ID="txtName" runat="server" CssClass="rich-input"></asp:TextBox>
        <asp:RequiredFieldValidator ID="rfvName" runat="server"
            ControlToValidate="txtName" ErrorMessage="Name Required"
            ForeColor="Red"></asp:RequiredFieldValidator>
        <br /><br />

        <asp:Label ID="lblEmail" runat="server" Text="Email:"></asp:Label>
        <asp:TextBox ID="txtEmail" runat="server" CssClass="rich-input"></asp:TextBox>
        <asp:RequiredFieldValidator ID="rfvEmail" runat="server"
            ControlToValidate="txtEmail" ErrorMessage="Email Required"
            ForeColor="Red"></asp:RequiredFieldValidator>
        <br />
        <asp:RegularExpressionValidator ID="revEmail" runat="server"
            ControlToValidate="txtEmail" ErrorMessage="Invalid Email" ForeColor="Red"
            ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">
        </asp:RegularExpressionValidator>
        <br /><br />

        Salary:<asp:TextBox ID="txtSal" runat="server"></asp:TextBox>
        <asp:RangeValidator ID="rvSal" runat="server" BackColor="White"
            ControlToValidate="txtSal" ErrorMessage="Salary must be from 10000 to 20000"
            ForeColor="#FF0066" MaximumValue="20000" MinimumValue="10000">
        </asp:RangeValidator>
        <br /><br />

        Date of joining:<asp:Calendar ID="Calendar1" runat="server"></asp:Calendar>

        <asp:Button ID="btnSave" runat="server" CssClass="rich-button"
            Text="Save to File" OnClick="btnSave_Click" />
        <br /><br />

        <asp:Label ID="lblMessage" runat="server" ForeColor="Black"></asp:Label>
    </div>
    </form>
</body>
</html>

WebForm1.aspx.cs (Code Behind)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace program_6_rich_controls
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btnSave_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                String userData = "Name: " + txtName.Text + ", Email: " + txtEmail.Text +
                    ", Salary: " + txtSal.Text + ", Date: " + DateTime.Now + "\n";

                // File concept: Append to data.txt
                String filePath = Server.MapPath("~/data.txt");
                System.IO.File.AppendAllText(filePath, userData);

                lblMessage.Text = "Data saved to file successfully!";

                // Clear inputs
                txtName.Text = "";
                txtEmail.Text = "";
                txtSal.Text = "";
            }
            else
            {
                lblMessage.Text = "Please fix validation errors.";
            }
        }
    }
}

Expected Output:

Name: *

Email: *

Salary:

Date of joining: