RandomDate Source Code

RandomDate Example, source code file Form1.cs

using System;
using System.Windows.Forms;

/// <summary>
/// RandomDate Example
/// User selects a month from a combobox;
/// the application chooses a random day in
/// that month, then displays that date.
/// </summary>

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

private void cboMonth_SelectedIndexChanged(object sender, EventArgs e)
        {
            int numDays, day;
            int month = cboMonth.SelectedIndex;
            Random r = new Random();
            string monthName, date;

switch (month)
            {
                case 0: numDays = 31; break;
                case 1: numDays = 28; break;
                case 2: numDays = 31; break;
                case 3: numDays = 30; break;
                case 4: numDays = 31; break;
                case 5: numDays = 30; break;
                case 6: numDays = 31; break;
                case 7: numDays = 31; break;
                case 8: numDays = 30; break;
                case 9: numDays = 31; break;
                case 10: numDays = 30; break;
                default: numDays = 31; break;
            }

day = r.Next(1, numDays + 1);
            monthName = (string) cboMonth.SelectedItem;
            date = monthName + " " + day;
            lblDate.Text = date;
        }
    }
}

RandomDate Example, source code file Form1.Designer.cs

namespace RandomDate
{
    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.cboMonth = new System.Windows.Forms.ComboBox();
            this.label1 = new System.Windows.Forms.Label();
            this.lblDate = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // cboMonth
            // 
            this.cboMonth.Font = new System.Drawing.Font("Microsoft Sans Serif", 
                12F, System.Drawing.FontStyle.Regular, 
                System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.cboMonth.FormattingEnabled = true;
            this.cboMonth.Items.AddRange(new object[] {
            "January",
            "February",
            "March",
            "April",
            "May",
            "June",
            "July",
            "August",
            "September",
            "October",
            "November",
            "December"});
            this.cboMonth.Location = new System.Drawing.Point(12, 12);
            this.cboMonth.Name = "cboMonth";
            this.cboMonth.Size = new System.Drawing.Size(209, 28);
            this.cboMonth.TabIndex = 0;
            this.cboMonth.SelectedIndexChanged += 
                new System.EventHandler(this.cboMonth_SelectedIndexChanged);
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 
                14.25F, System.Drawing.FontStyle.Regular, 
                System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label1.Location = new System.Drawing.Point(59, 43);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(120, 24);
            this.label1.TabIndex = 1;
            this.label1.Text = "Select Month";
            // 
            // lblDate
            // 
            this.lblDate.AutoSize = true;
            this.lblDate.Font = new System.Drawing.Font("Microsoft Sans Serif", 
                14.25F, System.Drawing.FontStyle.Bold, 
                System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.lblDate.Location = new System.Drawing.Point(156, 77);
            this.lblDate.Name = "lblDate";
            this.lblDate.Size = new System.Drawing.Size(0, 24);
            this.lblDate.TabIndex = 2;
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 
                14.25F, System.Drawing.FontStyle.Bold, 
                System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.label2.Location = new System.Drawing.Point(8, 77);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(142, 24);
            this.label2.TabIndex = 3;
            this.label2.Text = "Random Date:";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(306, 169);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.lblDate);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.cboMonth);
            this.Name = "Form1";
            this.Text = "RandomDate Example";
            this.ResumeLayout(false);
            this.PerformLayout();

}

#endregion

private System.Windows.Forms.ComboBox cboMonth;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label lblDate;
        private System.Windows.Forms.Label label2;
    }
}