AutoTransformHandler

public static ObservableCollection<F> Transform<T, F>(List<T> target)
                      where F : new()
        {
            ObservableCollection<F> source = new ObservableCollection<F>();
            for (int i = 0; i < target.Count; i++)
            {
                F f = new F();
                f = Transform<T, F>(target[i]);
                source.Add(f);
            }
            return source;
        }

        public static List<F> Transform<T, F>(ObservableCollection<T> target)
                        where F : new()
        {
            List<F> source = new List<F>();
            for (int i = 0; i < target.Count; i++)
            {
                F f = new F();
                f = Transform<T, F>(target[i]);
                source.Add(f);
            }
            return source;
        }

        public static List<F> TransformList<T, F>(List<T> target)
                where F : new()
        {
            List<F> source = new List<F>();
            for (int i = 0; i < target.Count; i++)
            {
                F f = new F();
                f = Transform<T, F>(target[i]);
                source.Add(f);
            }
            return source;
        }

        public static ObservableCollection<F> TransformObservableCollection<T, F>(ObservableCollection<T> target)
                where F : new()
        {
            ObservableCollection<F> source = new ObservableCollection<F>();
            for (int i = 0; i < target.Count; i++)
            {
                F f = new F();
                f = Transform<T, F>(target[i]);
                source.Add(f);
            }
            return source;
        }

        public static F Transform<T, F>(T target)
                         where F : new()
        {

            if (target == null)
            {
                return default(F);
            }
            F source = new F();
            if (target != null)
            {
                PropertyInfo[] fromFields = null;
                PropertyInfo[] toFields = null;

                fromFields = typeof(T).GetProperties();
                toFields = typeof(F).GetProperties();

                SetProperties(fromFields, toFields, target, source);
            }
            return source;
        }

        public static void Transform<T, F>(T target, F source)
        {
            PropertyInfo[] fromFields = null;
            PropertyInfo[] toFields = null;

            fromFields = typeof(T).GetProperties();
            toFields = typeof(F).GetProperties();

            SetProperties(fromFields, toFields, target, source);
        }

        public static void SetProperties(PropertyInfo[] fromFields,
                                          PropertyInfo[] toFields,
                                          object fromRecord,
                                          object toRecord)
        {
            PropertyInfo fromField = null;
            PropertyInfo toField = null;



            if (fromFields == null)
            {
                return;
            }
            if (toFields == null)
            {
                return;
            }

            for (int f = 0; f < fromFields.Length; f++)
            {
                fromField = (PropertyInfo)fromFields[f];

                for (int t = 0; t < toFields.Length; t++)
                {

                    toField = (PropertyInfo)toFields[t];

                    if (fromField.Name.ToUpper() != toField.Name.ToUpper())
                    {
                        continue;
                    }

                    if (toField.CanWrite)
                    {

                        if ((fromField.PropertyType == typeof(DateTime?) &&
                             toField.PropertyType == typeof(string)))
                        {
                            DateTime? fromDateTime = (DateTime?)fromField.GetValue(fromRecord, null);
                            if (!fromDateTime.HasValue)
                            {
                                toField.SetValue(toRecord,
                                null,
                                null);
                            }
                            else
                            {
                                toField.SetValue(toRecord,
                                fromDateTime.Value.ToString(),
                                null);
                            }
                            break;
                        }

                        if (((fromField.PropertyType == typeof(DateTime)
                            || fromField.PropertyType == typeof(Int32)
                            || fromField.PropertyType == typeof(decimal?)
                            ) &&
                            toField.PropertyType == typeof(string)))
                        {
                            object fromDateTime = fromField.GetValue(fromRecord, null);
                            toField.SetValue(toRecord,
                            fromDateTime.ToString(),
                            null);
                            break;
                        }

                        if ((fromField.PropertyType == typeof(DateTime?) &&
                                toField.PropertyType == typeof(long?)))
                        {
                            DateTime? fromDateTime = (DateTime?)fromField.GetValue(fromRecord, null);
                            if (!fromDateTime.HasValue)
                            {
                                toField.SetValue(toRecord,
                                null,
                                null);
                            }
                            else
                            {
                                toField.SetValue(toRecord,
                                    (((DateTime)fromDateTime.Value).Ticks - new DateTime(1970, 1, 1).Ticks) / 10000000,
                                    null);
                            }
                            break;
                        }
                        if (fromField.PropertyType == typeof(decimal?)
                                && toField.PropertyType == typeof(double?))
                        {
                            double? toDouble = null;
                            if (fromField.GetValue(fromRecord, null) != null)
                            {
                                toDouble = double.Parse(fromField.GetValue(fromRecord, null).ToString());
                            }
                            toField.SetValue(toRecord, toDouble, null);
                            break;
                        }

                        if (fromField.PropertyType == typeof(bool?)
                               && toField.PropertyType == typeof(string))
                        {
                            string toString = null;
                            if (fromField.GetValue(fromRecord, null) != null)
                            {
                                toString = fromField.GetValue(fromRecord, null).ToString();
                            }
                            toField.SetValue(toRecord, toString, null);
                            break;
                        }

                        toField.SetValue(toRecord,
                                         fromField.GetValue(fromRecord, null),
                                         null);
                        break;

                    }
                    toField.SetValue(toRecord,
                                     fromField.GetValue(fromRecord, null),
                                     null);
                    break;

                }
            }
        }      

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作者：Ken Wang

出處：http://www.cnblogs.com/Wolfmanlq/

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