dataset转list实体

  private static object GetDefaultValue(object obj, Type type)
        {
            if (obj == DBNull.Value)
            {
                return default(object);
            }
            else
            {
                return Convert.ChangeType(obj, type);
            }
        }
   public static List<T> ConvertToModel<T>(DataSet ds)
        {
            List<T> l = new List<T>();
            foreach (DataTable dt in ds.Tables)
            {
                foreach (DataRow dr in dt.Rows)
                {
                    bool isunchecked=true;
                    //bool.TryParse(dr.ItemArray[17].ToString(),out isunchecked);
                    if (isunchecked)
                    {
                        T model = Activator.CreateInstance<T>();

                        foreach (DataColumn dc in dr.Table.Columns)
                        {
                            PropertyInfo pi = model.GetType().GetProperty(dc.ColumnName);
                            if (pi == null) continue;
                            if (pi.CanWrite == false) continue;

                            try
                            {
                                if (dr[dc.ColumnName] != DBNull.Value)
                                    pi.SetValue(model, dr[dc.ColumnName], null);
                                else
                                    pi.SetValue(model, default(object), null);
                            }
                            catch
                            {
                                pi.SetValue(model, GetDefaultValue(dr[pi.Name], pi.PropertyType), null);
                            }

                        }
                        l.Add(model);
                    }
                }
            }
            return l;
        }