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 runat="server"> <div> <asp:TextBox runat="server" Text="100" ></asp:TextBox> <br /> <br /> <asp:Button runat="server" Text="开始抽奖(装备)"/> <br /> <br /> <asp:Button runat="server" Text="开始抽奖(餐厅)"/> <br /> <br /> <asp:Button runat="server" Text="清屏"/> <br /> <asp:Literal 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 + " 权重：" + kvp.Value + " 暴出次数：" + c.ToString() + " 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 + " 权重：" + kvp.Value + " 暴出次数：" + c.ToString() + " 暴出率：" + rate + "%<br/>"; } } /// <summary> /// 根据随机权重判断所在范围 /// </summary> /// <param></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 = ""; } }