Windows窗體應用程序~隨機數字抽獎系統

實現後的效果圖：

步驟：

1.創建Windows窗體應用程序項目

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.Threading.Tasks;
using System.Windows.Forms;
using System.Collections;
namespace LuckyDraw
{
    public partial class Form1 : Form
    {
        public static ArrayList data;
        public Form1()
        {
            InitializeComponent();
            data = new ArrayList();
        }

        private void ClearDataBtn_Click(object sender, EventArgs e)
        {
            data.Clear();
            Form_DataLabel.Text = "";
        }

        private void StartBtn_Click(object sender, EventArgs e)
        {
            int num = 0;
            string allData = "";
            int oneText = int.Parse(textBox1.Text);
            int twoText = int.Parse(textBox2.Text);

            Random ro = new Random();
            long tick = DateTime.Now.Ticks;
            Random ran = new Random((int)(tick & 0xffffffffL) | (int)(tick >> 32));
            num = ro.Next(oneText, twoText+1);
            if (data.Count == 0)
            {
                //首數據直接添加
                data.Add(num);
                for (var j = 0; j < data.Count; j++)
                {
                    allData += " " + data[j];
                }
                Form_DataLabel.Text = allData;
            }
            else
            {
                DG(num, ro, data, false, oneText, twoText);
            }
        }

        //遞歸
        public void DG(int num, Random ro, ArrayList data, bool state,int oneText,int twoText)
        {
            string allData = "";
            int length = data.Count;
            try
            {
                if (state == false)
                {
                    for (var i = 0; i < length; i++)
                    {
                        if (int.Parse(data[i].ToString()) == num)
                        {
                            //若存在
                            num = ro.Next(oneText, twoText + 1);
                            DG(num, ro, data, false, oneText, twoText);
                            break;
                        }
                        else if ((i + 1) == length)
                        {
                            //若不存在才添加
                            data.Add(num);
                            for (var j = 0; j < length; j++)
                            {
                                allData += " " + data[j];
                            }
                            Form_DataLabel.Text = allData;
                        }
                    }
                }
            }
            catch { 
            
            }
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }
    }
}

Form1.Designer.cs：

namespace LuckyDraw
{
    partial class Form1
    {
        /// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的資源。
        /// </summary>
        /// <param name="disposing">如果應釋放託管資源，爲 true；否則爲 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗體設計器生成的代碼

        /// <summary>
        /// 設計器支持所需的方法 - 不要
        /// 使用代碼編輯器修改此方法的內容。
        /// </summary>
        private void InitializeComponent()
        {
            this.StartBtn = new System.Windows.Forms.Button();
            this.ClearDataBtn = new System.Windows.Forms.Button();
            this.Form_DataLabel = new System.Windows.Forms.Label();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // StartBtn
            // 
            this.StartBtn.Location = new System.Drawing.Point(50, 89);
            this.StartBtn.Name = "StartBtn";
            this.StartBtn.Size = new System.Drawing.Size(75, 23);
            this.StartBtn.TabIndex = 0;
            this.StartBtn.Text = "開始抽獎";
            this.StartBtn.UseVisualStyleBackColor = true;
            this.StartBtn.Click += new System.EventHandler(this.StartBtn_Click);
            // 
            // ClearDataBtn
            // 
            this.ClearDataBtn.Location = new System.Drawing.Point(151, 89);
            this.ClearDataBtn.Name = "ClearDataBtn";
            this.ClearDataBtn.Size = new System.Drawing.Size(75, 23);
            this.ClearDataBtn.TabIndex = 2;
            this.ClearDataBtn.Text = "清空數據";
            this.ClearDataBtn.UseVisualStyleBackColor = true;
            this.ClearDataBtn.Click += new System.EventHandler(this.ClearDataBtn_Click);
            // 
            // Form_DataLabel
            // 
            this.Form_DataLabel.Location = new System.Drawing.Point(12, 37);
            this.Form_DataLabel.Name = "Form_DataLabel";
            this.Form_DataLabel.Size = new System.Drawing.Size(244, 37);
            this.Form_DataLabel.TabIndex = 3;
            this.Form_DataLabel.Text = " ";
            this.Form_DataLabel.TextAlign = System.Drawing.ContentAlignment.TopCenter;
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(59, 12);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(66, 22);
            this.textBox1.TabIndex = 4;
            this.textBox1.Text = "1";
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(146, 12);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(65, 22);
            this.textBox2.TabIndex = 5;
            this.textBox2.Text = "100";
            this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(131, 15);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(9, 12);
            this.label1.TabIndex = 6;
            this.label1.Text = "-";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(268, 124);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.Form_DataLabel);
            this.Controls.Add(this.ClearDataBtn);
            this.Controls.Add(this.StartBtn);
            this.Name = "Form1";
            this.Text = "抽獎系統";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button StartBtn;
        private System.Windows.Forms.Button ClearDataBtn;
        private System.Windows.Forms.Label Form_DataLabel;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Label label1;
    }
}

源碼下載地址：

https://download.csdn.net/my