ASP.NET MVC 增强Convert用法+【分页2】

【分页2】 

   public dynamic PageQuery()

        {
            int pageIndex = Request.Params["page"] == null ? 1 : int.Parse(Request.Params["page"]);//Request["page"] 需要显示第几页 EasyUI datagrid自传
            int pageSize = Request.Params["rows"] == null ? 10 : int.Parse(Request.Params["rows"]);//每页大小 EasyUI datagrid自传
            try {
                BackUserInfoPageCondition condition = new BackUserInfoPageCondition
                {
                    pageIndex=pageIndex,
                    pageSize=pageSize,
                    UserCode = Request.Params["search_UserCode"],
                    UserName = Request.Params["search_UserName"],
                    IDNO = Request.Params["search_IDNO"],
                    Phone = Request.Params["search_Phone"],
                    DepartId = Request.Params["search_Depart"].Trim().ConvertTo<int>(),//默认-1请选择
                    DutyId = Request.Params["search_Duty"].Trim().ConvertTo<int>() ,
                    StatusFlag = Request.Params["search_StatusFlag"].Trim().ConvertTo<short?>(),
                    DimissionFlag = Request.Params["search_DimissionFlag"].Trim().ConvertTo<short?>(),
                    DisableFlag = Request.Params["search_DisableFlag"].Trim().ConvertTo<short?>(),
                    LockFlag = Request.Params["search_LockFlag"].Trim().ConvertTo<short?>()
                };
                var data = _IBackUserInfoService.PageQuery(condition);//根据条件query查询
                var o = new { total = condition.total, rows = data };//EasyUI datagrid需要
                return Json(o);
            }
            catch (Exception e)
            {
                //写日志
                return Content("ERROR");
            }
        }

using System;

using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;

namespace Common
{
    public static class Utils
    {
        
        /// <summary>
        /// MD5加密
        /// https://social.msdn.microsoft.com/Forums/zh-CN/590bd6a8-57d7-4041-81da-80fe8b832b77/md5
        /// http://blog.163.com/m13864039250_1/blog/static/21386524820150231533602/
        /// </summary>
        public static string GetMD5Hash(string input){
            //MD5 md5Hash = MD5.Create();
            MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
            byte[] data=md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
            StringBuilder sBuilder = new StringBuilder();
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));//字符串格式控制符 x 为十六进制 2每次两位数
            }//0xA、0x1A，这样看起来不整齐，为了好看，可以指定"X2"，这样显示出来就是：0x0A、0x1A。 
            return sBuilder.ToString();
        }

        /// <summary>
        /// 任意类型之间的转换
        /// 来源：http://www.cnblogs.com/artech/archive/2011/03/17/NullableType.html
        /// 用法：
        /// Utils.ConvertTo<short?>(Request.Params["LockFlag"])
        /// Request.Params["LockFlag"].ConvertTo<short?>()
        /// int intValue1               = "123".ConvertTo<int>();
        /// int? intValue2              = "123".ConvertTo<int?>();           
        /// DateTime dateTimeValue1     = "1981-08-24".ConvertTo<DateTime>();
        /// DateTime? dateTimeValue2    = "1981-08-24".ConvertTo<DateTime?>();
        /// </summary>
        public static T ConvertTo<T>(this IConvertible convertibleValue)
        {
            if (null == convertibleValue)
            {
                return default(T);
            }
            if (!typeof(T).IsGenericType)
            {
                return (T)Convert.ChangeType(convertibleValue, typeof(T));
            }
            else
            {
                Type genericTypeDefinition = typeof(T).GetGenericTypeDefinition();
                if (genericTypeDefinition == typeof(Nullable<>))
                {
                    return (T)Convert.ChangeType(convertibleValue, Nullable.GetUnderlyingType(typeof(T)));
                }
            }
            throw new InvalidCastException(string.Format("Invalid cast from type "{0}" to type "{1}".", convertibleValue.GetType().FullName, typeof(T).FullName));
        }
    }
}