using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    /// <summary>
    /// 日志工具类
    /// </summary>
    public class LogHelper
    {
        /// <summary>
        /// 获取每个对象包含的属性及值的一条字符串，默认以逗号分割
        /// </summary>
        /// <typeparam name="T">目标类型</typeparam>
        /// <param name="item">目标类型对象（实例）</param>
        /// <returns></returns>
        public static string GetInstancePropertyNameValue<T>(T item)
        {
            Type t = typeof(T);
            StringBuilder sb = new StringBuilder();
　            System.Reflection.PropertyInfo[] properties = t.GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);

            foreach (var i in properties)
            {
                string name = i.Name;
                object value = i.GetValue(item, null);

                if (i.PropertyType.IsValueType || i.PropertyType.Name.StartsWith("String"))
                {
                    sb.Append(string.Format("{0}:{1},", name, value is Nullable ? string.Empty : value));
                }

            }
            return sb.ToString();
        }
    }