C#动态添加SqlParamter参数

动态向SqlParameter 里添加相应参数,方法如下

先定义一个List,然后再往List里面添加SqlParameter对象,然后将List转为SqlParameter数组即可

List<SqlParameter> ilistStr = new List<SqlParameter>(); 

            ilistStr.Add(new SqlParameter("@Param1", "aa"));

            ilistStr.Add(new SqlParameter("@Param2", "bb"));

            ilistStr.Add(new SqlParameter("@Param3", "cc"));

            ilistStr.Add(new SqlParameter("@Param4", "dd"));

            ilistStr.Add(new SqlParameter("@ParamLike","%keyword%"));//Like的写法

SqlParameter[] param = ilistStr.ToArray();

相关方法：

/// <summary>
        /// 获取数据库参数
        /// </summary>
        /// <param name="name">名称</param>
        /// <param name="value">值</param>
        /// <param name="type">数据类型</param>
        /// <param name="size">长度</param>
        /// <returns></returns>
        public static SqlParameter GetParameter(string name, object value, SqlDbType type, int size)
        {
            SqlParameter param = new SqlParameter();
            param.ParameterName = name;
            if (type == SqlDbType.DateTime)
            {
                DateTime dtime;
                if (DateTime.TryParse(value.ToString(), out dtime) == false || dtime.Year == 1)
                {
                    param.Value = new DateTime(1970, 1, 1, 0, 0, 0);
                }
                else
                {
                    param.Value = value;
                }
            }
            else if (value == null)
            {
                param.Value = DBNull.Value;
            }
            else
            {
                param.Value = value;
            }
            param.SqlDbType = type;
            param.Size = size;
            return param;
        }

调用

public static List<XModel.PATROL_XPerson> Select(string name,string phone,DateTime dt1,DateTime dt2)
        {
            List<SqlParameter> param = new List<SqlParameter>();
            string sql = $@"select * from PATROL_X_PERSON as p
            inner join PERSON_INFO i on p.per_code = i.per_code
                where 1=1";
            if (name != "")
            {
                sql += $" and per_name like @name";
                param.Add(XTools.XDB.SQLHelper.GetParameter("@name", name, SqlDbType.Char, 32));
            }
            if (phone != "")
            {
                sql += $" and per_mobile like @phone";
                param.Add(XTools.XDB.SQLHelper.GetParameter("@phone", phone,SqlDbType.Char,32));
            }
}