怎么用.net制作抽奖程序

这篇文章主要介绍"怎么用.net制作抽奖程序"，在日常操作中，相信很多人在怎么用.net制作抽奖程序问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"怎么用.net制作抽奖程序"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>      
  
    
  
    
  
    
  
    
    
  

Default.aspx.cs

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page{  //:<名称:权重>  public Dictionary Goods = new Dictionary();  public int TotalWeight = 0;   public class Good  {    /// 
    /// 名称    /// 
    public string Name    {      get;      set;    }    /// 
    /// 权重（大于等于1，否则出现的可能性为0）    /// 
    public int Weight    {      get;      set;    }  }   public List Result = new List();   protected void Page_Load(object sender, EventArgs e)  {  }   /// 
  /// 初始化装备 俺是《梦三国》玩家，嘿嘿  /// 
  protected void InitGoods()  {    Goods.Clear();    TotalWeight = 0;     Goods.Add("寒冰爪", 2);     //神器（拳爪类）    Goods.Add("重毛皮", 300);    Goods.Add("小毛皮", 1000);    Goods.Add("轻毛皮", 1000);    Goods.Add("神之防具打造书", 5);    Goods.Add("传说武器打造书", 20);    Goods.Add("紫檀树枝", 300);    Goods.Add("硬毛皮", 600);    Goods.Add("勾魂水晶", 8);    Goods.Add("真龙炙舞剑", 30);    Goods.Add("董卓勾魂", 1);    //神器中的神器（长柄类）     foreach (KeyValuePair kvp in Goods)    {      TotalWeight += kvp.Value;    }   }   /// 
  /// 初始化餐厅，公司楼下餐厅比较多，只写几个，意思意思。。。  /// 
  protected void InitFood()  {    Goods.Clear();    TotalWeight = 0;     Goods.Add("清真兰州", 1);    Goods.Add("长安客", 1);    Goods.Add("迎客松", 1);    Goods.Add("吉祥混沌", 1);     foreach (KeyValuePair kvp in Goods)    {      TotalWeight += kvp.Value;    }  }   protected int GetTryParse()  {    try    {      return int.Parse(txtNum.Text);    }    catch {      return 1;    }  }   //开始抽奖（装备）  protected void btnRandom_Click(object sender, EventArgs e)  {    InitGoods();     lblResult.Text = lblResult.Text + "
";     int Count = GetTryParse();    for (int i = 1; i <= Count; i++)    {      Random rdm = new Random(GetRandomSeed());       int Weight = rdm.Next(1, TotalWeight + 1);       ProduceResult(Weight);    }     foreach (KeyValuePair kvp in Goods)    {      int c = Result.Count(d => d.Name == kvp.Key);      double rate = c * 1.0 / Count * 1.0 * 100;       lblResult.Text = lblResult.Text + "物品名称：" + kvp.Key + " 权重：" + kvp.Value + " 暴出次数：" + c.ToString() + " 暴出率：" + rate + "%
";    }   }   //开始抽奖（餐厅）  protected void btnRandomFood_Click(object sender, EventArgs e)  {    InitFood();     lblResult.Text = lblResult.Text + "
";     int Count = GetTryParse();    for (int i = 1; i <= Count; i++)    {      Random rdm = new Random(GetRandomSeed());       int Weight = rdm.Next(1, TotalWeight + 1);       ProduceResult(Weight);    }     foreach (KeyValuePair kvp in Goods)    {      int c = Result.Count(d => d.Name == kvp.Key);      double rate = c * 1.0 / Count * 1.0 * 100;       lblResult.Text = lblResult.Text + "餐厅名称：" + kvp.Key + " 权重：" + kvp.Value + " 暴出次数：" + c.ToString() + " 暴出率：" + rate + "%
";    }   }   /// 
  /// 根据随机权重判断所在范围  /// 
  ///   protected void ProduceResult(int Weight)  {    int min = 1;    int max = 1;    foreach (KeyValuePair kvp in Goods)    {      max = min + kvp.Value - 1;       if (Weight >= min && Weight <= max)      {        Good g = new Good();        g.Name = kvp.Key;        g.Weight = kvp.Value;        Result.Add(g);        return;      }       min = max + 1;    }  }   /// 
  /// 随机种子值（防止速度过快造成的重复）  /// 
  ///   private static int GetRandomSeed()  {    byte[] bytes = new byte[4];    System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider();    rng.GetBytes(bytes);    return BitConverter.ToInt32(bytes, 0);  }   //清屏操作  protected void btnClear_Click(object sender, EventArgs e)  {    lblResult.Text = "";  }}

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