C#读取数据库返回泛型集合（DataSetToList）

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protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                IList<LYZX.Model.LYZX_NewsTypeModel> list = GetList<LYZX.Model.LYZX_NewsTypeModel>(System.Configuration.ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString,               "select * from LYZX_NewsType");                GridView1.DataSource = list;                GridView1.DataBind();            }        }        public string GetNewsTypeLink(ref string baseUrl,Guid newsType)        {            return "";        }        /// <summary>                 /// 获取泛型集合                 /// /// </summary>                 /// /// <typeparam name="T">类型</typeparam>                 /// /// <param name="connStr">数据库连接字符串</param>                 /// <param name="sqlStr">要查询的T-SQL</param>                 /// <returns></returns>                 public IList<T> GetList<T>(string connStr, string sqlStr)                {                         using (SqlConnection conn = new SqlConnection(connStr))                        {                                using (SqlDataAdapter sda = new SqlDataAdapter(sqlStr, conn))                                {                                      DataSet ds = new DataSet();                                         sda.Fill(ds);                                        return DataSetToList<T>(ds, 0);                                }                        }               }        /// <summary>                 /// DataSetToList                 /// </summary>                  /// <typeparam name="T">转换类型</typeparam>                 /// <param name="dataSet">数据源</param>                 /// <param name="tableIndex">需要转换表的索引</param>                /// /// <returns>泛型集合</returns>        public IList<T> DataSetToList<T>(DataSet dataset,int tableIndex)        {            //确认参数有效            if (dataset==null || dataset.Tables.Count<=0|| tableIndex<0)            {                return null;            }            DataTable dt = dataset.Tables[tableIndex];            IList<T> list = new List<T>();            for (int i = 0; i < dt.Rows.Count; i++)            {                //创建泛型对象                T _t=Activator.CreateInstance<T>();                //获取对象所有属性                PropertyInfo [] propertyInfo=_t.GetType().GetProperties();                //属性和名称相同时则赋值                for (int j = 0; j < dt.Columns.Count; j++)                {                    foreach (PropertyInfo info in propertyInfo)                    {                        if (dt.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))                        {                            if (dt.Rows[i][j]!=DBNull.Value)                            {                                info.SetValue(_t, dt.Rows[i][j], null);                            }                            else                            {                                info.SetValue(_t, null, null);                            }                            break;                        }                     }                }                list.Add(_t);            }            return list;        }
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