datatable和list的转换

        
        public List<T> GetList<T>(DataTable table)
        ...{
            List<T> list = new List<T>();
            T t = default(T);
            PropertyInfo[] propertypes = null;
            string tempName = string.Empty;
            foreach (DataRow row in table.Rows)
            ...{
                t = Activator.CreateInstance<T>();
                propertypes = t.GetType().GetProperties();
                foreach (PropertyInfo pro in propertypes)
                ...{
                    tempName = pro.Name;
                    if (table.Columns.Contains(tempName))
                    ...{
                        object value = row[tempName];
                        if (!value.ToString().Equals(""))
                        ...{
                            pro.SetValue(t, value, null);
                        }
                    }
                }
                list.Add(t);
            }
            return list.Count == 0 ? null : list;
        }

				

        public DataSet ConvertToDataSet<T>(IList<T> list)
        ...{
            if (list == null || list.Count <= 0)
            ...{
                return null;
            }
 
            DataSet ds = new DataSet();
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;
 
            System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
 
            foreach (T t in list)
            ...{
                if (t == null)
                ...{
                    continue;
                }
 
                row = dt.NewRow();
 
                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                ...{
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];
 
                    string name = pi.Name;
 
                    if (dt.Columns[name] == null)
                    ...{
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }
 
                    row[name] = pi.GetValue(t, null);
                }
 
                dt.Rows.Add(row);
            }
 
            ds.Tables.Add(dt);
 
            return ds;
        }