public static class ModelBuilder

    {

        private static Dictionary<string, PropertyInfo> PropertyDictionary = new Dictionary<string, PropertyInfo>();



        public static TModel Build<TModel>(NameValueCollection inputCollection, string namePrefix) where TModel : new()

        {

            TModel model = new TModel();

            Type modelType = model.GetType();

            foreach (string elName in inputCollection.AllKeys)

            {

                if (!elName.StartsWith(namePrefix)) continue;



                string value = inputCollection[elName];

                if (string.IsNullOrEmpty(value)) continue;



                string propName = elName;

                if (!string.IsNullOrEmpty(namePrefix))

                    propName = elName.Substring(namePrefix.Length);



                //PropertyInfo prop = modelType.GetProperty(propName); //不使用缓存的

                PropertyInfo prop = GetPropertyInfo(modelType, propName);  //使用缓存的

                if (prop == null) continue;



                bool flag = false;

                object objValue = null;

                Type propType = prop.PropertyType;



                try

                {

                    if (propType.IsEnum)

                        objValue = Enum.Parse(propType, value, true);

                    else

                        objValue = Convert.ChangeType(value, propType);



                    flag = true;

                }

                catch { }



                if (flag)

                    prop.SetValue(model, objValue, null);

            }

            return model;

        }



        private static PropertyInfo GetPropertyInfo(Type modelType, string propertyName)

        {

            PropertyInfo property = null;

            string propertyFullName = string.Format("{0}.{1}", modelType.FullName, propertyName);



            if (PropertyDictionary.TryGetValue(propertyFullName, out property))

                return property;



            property = modelType.GetProperty(propertyName);

            if (property != null)

            {

                lock (PropertyDictionary)

                {

                    PropertyDictionary.Add(propertyFullName, property);

                }

            }

            return property;

        }

    }