protected void Button1_Click(object sender, EventArgs e)
{
//更新传值有多种方式
//字典传参的形式
CRL.ParameCollection c = new CRL.ParameCollection();
c["ProductName"] = "product1";
ProductDataManage.Instance.Update(b => b.Id == 4, c);
//按匿名对象
ProductDataManage.Instance.Update(b => b.Id == 4, new { ProductName = "product1" });
//按对象差异更新
var p = new ProductData()
{
Id = 4
};
//手动修改值时,指定修改属性以在Update时识别,分以下几种形式
p.Change(b => b.BarCode); //表示值被更改了
p.Change(b => b.BarCode, "123"); //通过参数赋值
p.Change(b => b.BarCode == "123"); //通过表达式赋值
p.Cumulation(b => b.ProductName, "1"); //表示按字段累加
ProductDataManage.Instance.Update(b => b.Id == 4, p); //指定查询更新
//当对象是查询创建则能自动识别
p = ProductDataManage.Instance.QueryItem(b => b.Id > 0);
p.UserId += 1; //只会更新UserId
p.ProductName = "2342342";
ProductDataManage.Instance.Update(p); //按主键更新,主键值是必须的
//使用完整查询关联更新
var query = OrderManage.Instance.GetLambdaQuery();
query.Join <ProductData>((a, b) => a.Id == b.Id && b.Number > 10);
c = new CRL.ParameCollection();
c["UserId"] = "$UserId"; //order.userid=product.userid
c["Remark"] = "2222"; //order.remark=2222
OrderManage.Instance.Update(query, c);
//等效语句为 update order set userid=ProductData.userid,remark='2222' from ProductData where order.id=ProductData.id and ProductData.number<10
}
