使用Dapper参数化查询（一）

封装查询实体类

public class QueryParameter
    {
        public QueryParameter()
        {
            listWhere = new List<string>();
            dynamicParameter = new DynamicParameters();
        }

        public List<string> listWhere { get; set; }
        public DynamicParameters dynamicParameter { get; set; }

        public string strWhere
        {
            get
            {
                if (listWhere != null && listWhere.Count > 0)
                    return string.Join(" AND ", listWhere);
                else
                    return "";
            }
        }
    }

使用时候

qp = new QueryParameter();
            if (!string.IsNullOrWhiteSpace(txtcname.Text))
            {
                _qp.listWhere.Add(" cname LIKE @cname ");
                _qp.dynamicParameter.Add("@cname", "%" + txtcname.Text.Trim() + "%");
            }
            if (!string.IsNullOrWhiteSpace(txtcaccount.Text))
            {
                _qp.listWhere.Add(" caccount LIKE @caccount ");
                _qp.dynamicParameter.Add("@caccount", "%" + txtcaccount.Text.Trim() + "%");
            }
            if (!string.IsNullOrWhiteSpace(txtcinput.Text))
            {
                _qp.listWhere.Add(" cinput=@cinput ");
                _qp.dynamicParameter.Add("@cinput", txtcinput.Text.Trim());
            }

/// <summary>
        /// 获得数据列表
        /// </summary>
        public List<op_company> GetList(QueryParameter qp)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("SELECT * FROM op_company ");
            if (!string.IsNullOrEmpty(qp.strWhere))
            {
                strSql.Append(" WHERE " + qp.strWhere);
            }
            return DBHelperFactory.RemoteWrite.DbConnection.Query<op_company>(strSql.ToString(), qp.dynamicParameter).ToList();
        }