list转换成DataTable

list转换成DataTable类如下：

public static DataTable ToDataTable<T>(this  IList<T> datas)

        {

            DataTable dt = new DataTable();

            Type type = typeof(T);

            PropertyInfo[] properties = type.GetProperties();

            List<KeyValuePair<PropertyInfo, ExportFieldAttribute>> propertyInfos = new List<KeyValuePair<PropertyInfo, ExportFieldAttribute>>();



            //获取需要导出列信息

            foreach (PropertyInfo propertyInfo in properties)

            {

                ExportFieldAttribute attribute = Attribute.GetCustomAttribute(propertyInfo, typeof(ExportFieldAttribute)) as ExportFieldAttribute;

                if (attribute != null)

                {

                    propertyInfos.Add(new KeyValuePair<PropertyInfo, ExportFieldAttribute>(propertyInfo, attribute));

                }

            }



           propertyInfos= propertyInfos.OrderBy(p => p.Value.Sort).ToList();//列排序



            //添加列

           propertyInfos.ForEach(p =>

           {

               DataColumn dataColumn = new DataColumn(p.Key.Name, p.Key.PropertyType);

               dt.Columns.Add(dataColumn);

           } );



           datas.ToList().ForEach(data =>

           {

               DataRow dtRow = dt.NewRow();

               foreach (PropertyInfo propertyInfo in propertyInfos.Select(p => p.Key))

               {

                   dtRow[propertyInfo.Name] = propertyInfo.GetValue(data, null);

               }

               dt.Rows.Add(dtRow);

           }

           );

            ////填充数据

            //foreach (T data in datas)

            //{

            //    DataRow dtRow = dt.NewRow();

            //    foreach (PropertyInfo propertyInfo in propertyInfos.Select(p=>p.Key))

            //    {

            //      dtRow[propertyInfo.Name]=propertyInfo.GetValue(data, null);

            //    }

            //    dt.Rows.Add(dtRow);

            //}



            return dt;

        }

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属性类如下：

public class ExportFieldAttribute : Attribute

    {

        public ExportFieldAttribute()

        {

        }



        public ExportFieldAttribute(int sort)

        {

            Sort = sort;

        }

        public int Sort { get; set; }//排序

    }

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属性标记的类如下：

 public class DiscardStatics

    {

        private string _sn;



        [ExportFieldAttribute(Sort=2)]

        public string Sn

        {

            get { return _sn; }

            set { _sn = value; }

        }



        private string _propertyName;



        [ExportFieldAttribute(3)]

        public string PropertyName

        {

            get { return _propertyName; }

            set { _propertyName = value; }

        }

        private string aa { get; set; }



        private string _type;

        [ExportFieldAttribute(5)]

        public string Type

        {

            get { return _type; }

            set { _type = value; }

        }



        private DateTime _discardTime;

        [ExportFieldAttribute(4)]

        public DateTime DiscardTime

        {

            get { return _discardTime; }

            set { _discardTime = value; }

        }



        private double residuals;

        [ExportFieldAttribute(1)]

        public double Residuals

        {

            get { return residuals; }

            set { residuals = value; }

        }



        private string _propertyId;

        public string PropertyId

        {

            get { return _propertyId; }

            set { _propertyId = value; }

        }



        private string _brand;

        public string Brand

        {

            get { return _brand; }

            set { _brand = value; }

        }



        private string _supplier;

        public string Supplier

        {

            get { return _supplier; }

            set { _supplier = value; }

        }



        private string _contactInfo;

        public string ContactInfo

        {

            get { return _contactInfo; }

            set { _contactInfo = value; }

        }



        private string _childPtyId;

        public string ChildPtyId

        {

            get { return _childPtyId; }

            set { _childPtyId = value; }

        }



        private string _childPtyName;

        public string ChildPtyName

        {

            get { return _childPtyName; }

            set { _childPtyName = value; }

        }

    }

View Code