[DataContract]    public class PU_ArrivalVouchs : IPU_ArrivalVouchs    {        /// 
        /// 采购到货单子表标识        /// 
		        [DataMember(IsRequired = true,Order=0)]        public int? Autoid { get; set; }        /// 
        /// 采购到货单主表标识        /// 
		        [DataMember(IsRequired = true)]        public int? ID { get; set; }        /// 
        /// 仓库编码        /// 
		        [DataMember(IsRequired = true)]        public string cWhCode { get; set; }        /// 
        /// 存货编码        /// 
		        [DataMember(IsRequired = true)]        public string cInvCode { get; set; }        /// 
        /// 辅计量数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? iNum { get; set; }        /// 
        /// 数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? iQuantity { get; set; }        /// 
        /// 采购订单子表标识        /// 
		        [DataMember(IsRequired = true)]        public int? iPOsID { get; set; }        /// 
        /// 开票数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? fKPQuantity { get; set; }        /// 
        /// 实收数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? fRealQuantity { get; set; }        /// 
        /// 关闭人        /// 
		        [DataMember(IsRequired = true)]        public string cCloser { get; set; }        /// 
        /// 是否质检        /// 
		        [DataMember(IsRequired = true)]        public int? bGsp { get; set; }        /// 
        /// 批号        /// 
		        [DataMember(IsRequired = true)]        public string cBatch { get; set; }        / 
        / dVDate        / 
		        //[DataMember(IsRequired = true)]        //public DateTime dVDate { get; set; }        / 
        / dPDate        / 
		        //[DataMember(IsRequired = true)]        //public DateTime dPDate { get; set; }        /// 
        /// 退货数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? fthquantity { get; set; }        /// 
        /// 退货件数        /// 
		        [DataMember(IsRequired = true)]        public decimal? fthnum { get; set; }        /// 
        /// 报废数量        /// 
		        [DataMember(IsRequired = true)]        public decimal? fbfquantity { get; set; }        /// 
        /// 报废件数        /// 
		        [DataMember(IsRequired = true)]        public decimal? fbfnum { get; set; }        /// 
        /// 已检验件数        /// 
		        [DataMember(IsRequired = true)]        public decimal? finchecknum { get; set; }        //+-----------------------------------------------------------        //+ Api中必须的字段        //+-----------------------------------------------------------        /// 
        /// 税率        /// 
		        [DataMember(IsRequired = true)]        public decimal? itaxrate { get; set; }    }

 

[DataMember(IsRequired = true,Order=0)]

        public int? Autoid { get; set; }

需要在字段前加 [DataMember(IsRequired = true,Order=0)]    IsRequired=true 属性,   Order属性可加可不加,加上去则以该顺序序列化,如果不加则默认以字母为顺序.

加上该属性后,非字符串类型 如:datetime,int,decimal,double 等等 就可以被传递到 WCF端了.