Use Text Boxes, Labels and buttons convert Uppercase | Lowercase | Concatenate | Add
The .NET framework is built upon the
object-oriented approach. Everything in the .NET framework is a class or an
instance of a class. One of the main components of the .NET framework is the class
library. Class libraries are collection of reusable classes, or types.
These class libraries are sub divided into namespaces, which group the classes
according to the services they offer. System is one of the important
namespaces defined in the .NET framework. It contains all the fundamental
classes and base classes or types that would be commonly used by all
applications. System.Windows.Forms is the next important namespace. This namespace contains classes required to
create user interfaces. Some of the other namespaces used while creating
a user interface are:
Ø System.Drawing
Ø System.Collections
Ø System.ComponentModel
Ø System.Data
WinForms
follow the Object-oriented approach. Different
controls or components used to build the user interface in WinForms are available
in the form of classes. Some of the classes that are included in the
Systems.Windows.Forms namespace are:
Ø TextBox
Ø Button
Ø Label
Ø ListBox
Ø ComboBox
Ø CheckBox
Use Textboxes, Labels
and buttons to take two values as input and provide following features:
Add values and display result
Concatenate values and display result
Convert to uppercase the concatenation
of two values
Convert to lowercase the concatenation
of two values
Note: Align the
controls properly. Ignore error checking code for this lab.
Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace vp2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void
bt1_Click(object sender, EventArgs e)
{
int sum;
sum = int.Parse(textBox1.Text) + int.Parse(textBox2.Text);
lb1.Text = sum.ToString();
}
private void
bt2_Click(object sender, EventArgs e)
{
lb2.Text = textBox1.Text + textBox2.Text;
}
private void
bt3_Click(object sender, EventArgs e)
{
lb3.Text=lb2.Text.ToUpper();
}
private void
bt4_Click(object sender, EventArgs e)
{
lb4.Text = lb2.Text.ToLower();
}
}
}
Screen Shot
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