高级查询

以下演示了复杂查询

    var query = Code.ProductDataManage.Instance.GetLamadaQuery();
    //添加引用CRL
    query = query.Select(b=>b.SelectField(b.InterFaceUser,b.ProductName,b.PurchasePrice));//选择查询的字段
    query = query.Top(10);//取多少条
    query = query.Where(b => b.Id < 700 && b.InterFaceUser == "USER1");//查询条件
    query = query.OrderBy(b => b.Id, true);//排序条件
    var list = Code.ProductDataManage.Instance.QueryList(query);
    

    //创建分页存储过程sp_TablesPageNew.sql
    int page = 1;
    int pageSize = 15;
    int count;
    CRL.ParameCollection c = new CRL.ParameCollection();
    string where = " InterFaceUser=‘test‘";//按标准 SQL 进行拼接
    c.SetQueryCondition(where);
    c.SetQueryPageIndex((int)page);
    c.SetQueryPageSize(pageSize);
    var list = Code.ProductDataManage.Instance.QueryListByPage(c, out count);
    

    //此方法演示根据结果集返回动态对象
    string sql = "select top 10 Id,ProductId,ProductName from ProductData";
    var helper = dbHelper;
    var list = helper.ExecDynamicList(sql);
    //添加引用 Miscorsoft.CSharp程序集
    foreach(dynamic item in list)
    {
        var id = item.Id;
        var productId = item.ProductId;
    }
    

//按条件id>0,合计Number列
var sum = Code.ProductDataManage.Instance.Sum(b => b.Id > 0, "Number");
//按条件id>0,进行总计
var count = Code.ProductDataManage.Instance.Count(b => b.Id > 0);