Question

C# Visual Studios

Create a GUI application that prompts users to enter a ten (10) digit phone number, with hyphens and parentheses included – this input should be validated as a phone number adhering to the (XXX)-XXX-XXXX format.

Should the user input an incorrect format, an error message should print to screen and your phone number textbox should be highlighted in red.

Should an appropriately formatted phone number be entered, an acceptance message should printed to screen and your phone number textbox should be highlighted in green.

Answer 1

C# Code:

File: Form1.Designer.cs

namespace PhoneNumber
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.tbPhoneNumber = new System.Windows.Forms.TextBox();
            this.btnValidate = new System.Windows.Forms.Button();
            this.lblMsg = new System.Windows.Forms.Label();
            this.SuspendLayout();
            //
            // label1
            //
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(23, 79);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(163, 13);
            this.label1.TabIndex = 0;
            this.label1.Text = "Please enter your phone number:";
            //
            // tbPhoneNumber
            //
            this.tbPhoneNumber.Location = new System.Drawing.Point(192, 76);
            this.tbPhoneNumber.Name = "tbPhoneNumber";
            this.tbPhoneNumber.Size = new System.Drawing.Size(140, 20);
            this.tbPhoneNumber.TabIndex = 1;
            //
            // btnValidate
            //
            this.btnValidate.Location = new System.Drawing.Point(138, 120);
            this.btnValidate.Name = "btnValidate";
            this.btnValidate.Size = new System.Drawing.Size(75, 23);
            this.btnValidate.TabIndex = 2;
            this.btnValidate.Text = "Validate";
            this.btnValidate.UseVisualStyleBackColor = true;
            this.btnValidate.Click += new System.EventHandler(this.btnValidate_Click);
            //
            // lblMsg
            //
            this.lblMsg.AutoSize = true;
            this.lblMsg.Font = new System.Drawing.Font("Monotype Corsiva", 15.75F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.lblMsg.Location = new System.Drawing.Point(63, 162);
            this.lblMsg.Name = "lblMsg";
            this.lblMsg.Size = new System.Drawing.Size(0, 25);
            this.lblMsg.TabIndex = 3;
            //
            // Form1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(399, 248);
            this.Controls.Add(this.lblMsg);
            this.Controls.Add(this.btnValidate);
            this.Controls.Add(this.tbPhoneNumber);
            this.Controls.Add(this.label1);
            this.Name = "Form1";
            this.Text = "Phone Number Validater";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox tbPhoneNumber;
        private System.Windows.Forms.Button btnValidate;
        private System.Windows.Forms.Label lblMsg;
    }
}

File: Form1.cs

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 PhoneNumber
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //Method that validates the textbox text
        bool validate(String phNumber)
        {
            //Checking for format
            if (phNumber[0] == '(' && phNumber[4] == ')' && phNumber[5] == '-' && phNumber[9] == '-')
            {
                return false;
            }
            else
            {
                return true;
            }
        }

        //Button click event handler
        private void btnValidate_Click(object sender, EventArgs e)
        {
            //Fetching phone number from textbox
            String phNum = tbPhoneNumber.Text;
          
            //Empty text
            if (phNum.Length == 0)
            {
                tbPhoneNumber.BackColor = Color.Red;
                lblMsg.Text = "Invalid phone number";
            }
            //Not in correct format
            else if (validate(phNum))
            {
                tbPhoneNumber.BackColor = Color.Red;
                lblMsg.Text = "Invalid phone number";
            }
            else
            {
                tbPhoneNumber.BackColor = Color.Green;
                lblMsg.Text = "Valid phone number";
            }
        }
    }
}

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