.net制作的抽餐厅和游戏装备的小程序

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随便新建一个asp.net web项目，拖入即可。现在知道为什么游戏老是暴不出好装备，因为他的权重是非常小地。。。中午吃饭随机一下，想去哪一家，就把权重值设大一点，再中不了，就认命吧！

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title>加权随机</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>
  <asp:TextBox ID="txtNum" runat="server" Text="100" ></asp:TextBox>
  <br />
  <br />
  <asp:Button ID="btnRandom" runat="server" Text="开始抽奖(装备)" onclick="btnRandom_Click"/>
  <br />
  <br />
  <asp:Button ID="btnRandomFood" runat="server" Text="开始抽奖(餐厅)" onclick="btnRandomFood_Click"/>
  <br />
  <br />
  <asp:Button ID="btnClear" runat="server" Text="清屏" onclick="btnClear_Click"/>
  <br />
  <asp:Literal ID="lblResult" runat="server"></asp:Literal>
  </div>
  </form>
</body>
</html>

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
{
  //<string,int>:<名称:权重>
  public Dictionary<string, int> Goods = new Dictionary<string, int>();
  public int TotalWeight = 0;
 
  public class Good
  {
    /// <summary>
    /// 名称
    /// </summary>
    public string Name
    {
      get;
      set;
    }
    /// <summary>
    /// 权重（大于等于1，否则出现的可能性为0）
    /// </summary>
    public int Weight
    {
      get;
      set;
    }
  }
 
  public List<Good> Result = new List<Good>();
 
  protected void Page_Load(object sender, EventArgs e)
  {
  }
 
  /// <summary>
  /// 初始化装备 俺是《梦三国》玩家，嘿嘿
  /// </summary>
  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<string, int> kvp in Goods)
    {
      TotalWeight += kvp.Value;
    } 
  }
 
  /// <summary>
  /// 初始化餐厅，公司楼下餐厅比较多，只写几个，意思意思。。。
  /// </summary>
  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<string, int> 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 + "<br/>";
 
    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<string, int> 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 + "&nbsp;权重：" + kvp.Value + "&nbsp;暴出次数：" + c.ToString() + "&nbsp;暴出率：" + rate + "%<br/>";
    }
 
  }
 
  //开始抽奖（餐厅）
  protected void btnRandomFood_Click(object sender, EventArgs e)
  {
    InitFood();
 
    lblResult.Text = lblResult.Text + "<br/>";
 
    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<string, int> 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 + "&nbsp;权重：" + kvp.Value + "&nbsp;暴出次数：" + c.ToString() + "&nbsp;暴出率：" + rate + "%<br/>";
    }
 
  }
 
  /// <summary>
  /// 根据随机权重判断所在范围
  /// </summary>
  /// <param name="Weight"></param>
  protected void ProduceResult(int Weight)
  {
    int min = 1;
    int max = 1;
    foreach (KeyValuePair<string, int> 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;
    }
  }
 
  /// <summary>
  /// 随机种子值（防止速度过快造成的重复）
  /// </summary>
  /// <returns></returns>
  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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