/// <summary>
        /// 数字金额转化财务大写金额
        /// </summary>
        /// <param name="num">数字金额</param>
        /// <returns>大写金额</returns>
        public static string MoneyConvert(decimal num)
        {
            string str1 = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字
            string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字
            string str3 = "";    //从原num值中取出的值
            string str4 = "";    //数字的字符串形式
            string str5 = "";  //人民币大写金额形式
            int i;    //循环变量
            int j;    //num的值乘以100的字符串长度
            string ch1 = "";    //数字的汉语读法
            string ch2 = "";    //数字位的汉字读法
            int nzero = 0;  //用来计算连续的零值是几个
            int temp;            //从原num值中取出的值

            num = Math.Round(Math.Abs(num), 2);    //将num取绝对值并四舍五入取2位小数
            str4 = ((long)(num * 100)).ToString();        //将num乘100并转换成字符串形式
            j = str4.Length;      //找出最高位
            if (j > 15) { return "溢出"; }
            str2 = str2.Substring(15 - j);   //取出对应位数的str2的值。如：200.55,j为5所以tr2=佰拾元角分

            //循环取出每一位需要转换的值
            for (i = 0; i < j; i++)
            {
                str3 = str4.Substring(i, 1);          //取出需转换的某一位的值
                temp = Convert.ToInt32(str3);      //转换为数字
                if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))
                {
                    //当所取位数不为元、万、亿、万亿上的数字时
                    if (str3 == "0")
                    {
                        ch1 = "";
                        ch2 = "";
                        nzero = nzero + 1;
                    }
                    else
                    {
                        if (str3 != "0" && nzero != 0)
                        {
                            ch1 = "零" + str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                        else
                        {
                            ch1 = str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                    }
                }
                else
                {
                    //该位是万亿，亿，万，元位等关键位
                    if (str3 != "0" && nzero != 0)
                    {
                        ch1 = "零" + str1.Substring(temp * 1, 1);
                        ch2 = str2.Substring(i, 1);
                        nzero = 0;
                    }
                    else
                    {
                        if (str3 != "0" && nzero == 0)
                        {
                            ch1 = str1.Substring(temp * 1, 1);
                            ch2 = str2.Substring(i, 1);
                            nzero = 0;
                        }
                        else
                        {
                            if (str3 == "0" && nzero >= 3)
                            {
                                ch1 = "";
                                ch2 = "";
                                nzero = nzero + 1;
                            }
                            else
                            {
                                if (j >= 11)
                                {
                                    ch1 = "";
                                    nzero = nzero + 1;
                                }
                                else
                                {
                                    ch1 = "";
                                    ch2 = str2.Substring(i, 1);
                                    nzero = nzero + 1;
                                }
                            }
                        }
                    }
                }
                if (i == (j - 11) || i == (j - 3))
                {
                    //如果该位是亿位或元位，则必须写上
                    ch2 = str2.Substring(i, 1);
                }
                str5 = str5 + ch1 + ch2;

                if (i == j - 1 && str3 == "0")
                {
                    //最后一位（分）为0时，加上“整”
                    str5 = str5 + '整';
                }
            }
            if (num == 0)
            {
                str5 = "零元整";
            }
            return str5;
        }

        /// <summary>
        /// Linq查询结果转化为datatable
        /// </summary>
        /// <typeparam name="T">对象</typeparam>
        /// <param name="data">查询结果</param>
        /// <returns>dt</returns>
        public static System.Data.DataTable LinqToDataTable<T>(IEnumerable<T> data)
        {
            var dt = new System.Data.DataTable();
            var ps = typeof(T).GetProperties().ToList();
            ps.ForEach(p => dt.Columns.Add(p.Name, p.PropertyType));
            foreach (T t in data)
            {
                var dr = dt.NewRow();
                var vs = from p in ps select p.GetValue(t, null);
                var ls = vs.ToList();
                int i = 0;
                ls.ForEach(c => dr[i++] = c);
                dt.Rows.Add(dr);
            }
            return dt;
        }

PropertyInfo pi = typeof(T).GetProperty("假想T属性")

                if (pi == null)

                {

                    throw new Exception ("未找到该属性");

                }

                else

                {

                    Type t = pi.PropertyType;//默认取得该属性

                     //判断是否为泛型 ， 并且判断是否具有类型Nullable<>

                    if (pi.PropertyType.IsGenericType && pi.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>))

                    {

                        if (pi.PropertyType.GetGenericArguments().Length > 0)

                        {

                            t = pi.PropertyType.GetGenericArguments()[0];//默认第一个参数为正真的类型，数据类型。。

                        }

                    }

                    object ooo = dr["Value"];//下面演示了如何把DBNULL的object  赋指定类型的默认值。

                    if (ooo == DBNull.Value)

                    {

                        ooo = GetDefaultValue(t);

                    }

                    pi.SetValue(obj, Convert.ChangeType(ooo, t), null);

                }

        public static object GetDefaultValue(Type parameter)

        {

            var defaultGeneratorType =

              typeof(DefaultGenerator<>).MakeGenericType(parameter);

            return defaultGeneratorType.InvokeMember(

              "GetDefault",

              BindingFlags.Static |

              BindingFlags.Public |

              BindingFlags.InvokeMethod,

              null, null, new object[0]);

        }

        

        private  class DefaultGenerator<T>

        {

            public static T GetDefault()

            {

                return default(T);

            }

        }