using System;
using System.Web;
//using System.Web.UI;
using System.Security.Cryptography;
using System.Text;
using System.Collections.Generic;

namespace ZcPeng.PublicLibrary
{
    /// <summary>
    /// Utility
    /// 功能：工具类。
    /// 作者：彭昭成
    /// 时间：2018年12月10日
    /// </summary>
    public static class Utility
    {
        //静态成员
        public static string ShowMessageUrl = "~/ShowMessage.aspx";		//“显示信息”页的url

        /// <summary>
        /// 生成”显示信息“页的含参数地址
        /// </summary>
        /// <param name="title">标题</param>
        /// <param name="description">描述</param>
        /// <returns>返回生成的url</returns>
        //public static string GenerateShowMessageUrl(string title, string description)
        //{
        //    HttpServerUtility server = HttpContext.Current.Server;
        //    return ShowMessageUrl + "?Title=" + server.UrlEncode(title) + "&Description=" + server.UrlEncode(description);
        //}

        /// <summary>
        /// 对指定字符串进行MD5加密（采用.net的方式）
        /// </summary>
        /// <param name="source">需要被加密的字符串</param>
        /// <param name="source">输出参数，返回加密之后的结果</param>
        /// <returns>返回是否加密成功</returns>
        public static bool MD5(string source, out string result)
        {
            bool bSuccessed = false;
            result = "";
            try
            {
                byte[] byteSource = Encoding.Default.GetBytes(source);	//使用默认的ANSI编码
                System.Security.Cryptography.MD5 md5 = new MD5CryptoServiceProvider();				//创建MD5对象
                byte[] byteHash = md5.ComputeHash(byteSource);			//进行HASH运算
                result = BitConverter.ToString(byteHash);				//将得到的结果转化为字符串
                result = result.Replace("-", "");						//去掉结果中的减号“-”（以下2步是为了和ASP模式下的MD5兼容而设置）
                result = result.ToLower();								//将结果转化为小写
                md5.Clear();
                bSuccessed = true;
            }
            catch
            {
                bSuccessed = false;
            }
            if (!bSuccessed)
                result = "";
            return bSuccessed;
        }

        /// <summary>
        /// 显示客户端提示对话框信息
        /// </summary>
        /// <param name="scriptKey">脚本的键-用于避免重复注册客户端脚本</param>
        /// <param name="alertText">提示文本</param>
        //public static void ShowClientAlert(Page page, string scriptKey, string alertText)
        //{
        //    alertText = alertText.Replace("\"", "\\\"");
        //    ClientScriptManager cs = page.ClientScript;
        //    if (!cs.IsStartupScriptRegistered(cs.GetType(), scriptKey))
        //        cs.RegisterStartupScript(cs.GetType(), scriptKey, string.Format("<script language=\"javascript\" type=\"text/javascript\">alert(\"{0}\");</script>\r\n", alertText));
        //}

        /// <summary>
        /// 显示客户端是与否的对话框
        /// </summary>
        /// <param name="scriptKey">脚本的键-用于避免重复注册客户端脚本</param>
        /// <param name="alertText">提示文本</param>
        //public static void ShowConfirm(Page page, string scriptKey, string alertText, string doText)
        //{
        //    alertText = alertText.Replace("\"", "\\\"");
        //    ClientScriptManager cs = page.ClientScript;
        //    if (!cs.IsStartupScriptRegistered(cs.GetType(), scriptKey))
        //        cs.RegisterStartupScript(cs.GetType(), scriptKey, string.Format("<script>if(window.confirm('{0}')){1}</script>", alertText, doText));
        //}

        /// <summary>
        /// 得到GUID字符串，去掉“-”号，转换成大写字母
        /// </summary>
        /// <param name="guid">guid对象</param>
        /// <returns>返回GUID字符串</returns>
        public static string GetGuidString(Guid guid)
        {
            return guid.ToString().Replace("-", "").ToUpper();
        }

        /// <summary>
        /// 得到一个新的GUID字符串，去掉“-”号，转换成大写字母
        /// </summary>
        /// <returns>返回GUID字符串</returns>
        public static string GetNewGuidString()
        {
            return GetGuidString(Guid.NewGuid());
        }

        /// <summary>
        /// 从ORACLE数据库的BLOB类型中获取字符串
        /// </summary>
        /// <param name="blob">BLOB类型的值</param>
        /// <returns>返回字符串</returns>
        public static string GetStringFromOracleBlob(object blob)
        {
            return (blob == null || Convert.IsDBNull(blob)) ? "" : UTF8Encoding.UTF8.GetString((byte[])blob);
        }

        /// <summary>
        /// 从字符串中获取ORACLE数据库的BLOB类型
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>返回字节数组</returns>
        public static byte[] GetOracleBlobFromString(string str)
        {
            return string.IsNullOrEmpty(str) ? null : UTF8Encoding.UTF8.GetBytes(str);
        }

        /// <summary>
        /// 判断列表中是否存在重复的元素
        /// </summary>
        /// <typeparam name="T">列表的类型，必须为实现了IComparable接口的可比较类型</typeparam>
        /// <param name="list">列表</param>
        /// <returns>返回是否包含重复元素</returns>
        public static bool IsRepeated<T>(List<T> list) where T : IComparable<T>
        {
            if (list != null && list.Count > 1)
            {
                int count = list.Count;
                for (int i = 0; i < count; i++)
                {
                    for (int j = i + 1; j < count; j++)
                    {
                        if (list[i].CompareTo(list[j]) == 0)
                            return true;
                    }
                }
            }
            return false;
        }
    }
}