实现后的效果图：
1.创建Windows窗体应用程序真实的铃铛
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) { //首数据直接添加 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); } } //递归 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> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </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 = "开始抽奖"; 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 = "清空数据"; 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.迷你的毛衣(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 = "抽奖系统"; 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; }}源码下载地址：
https://download.csdn.net/my