Question

我们已经研究出如何使用“sql like”语法对实体进行数据绑定：

var countryQuery = from c in ShopEntities.ShippingCountries
                   orderby c.Order
                   select new { c.ShippingCountryId, c.Name};

Country.DataValueField = "ShippingCountryId"; //country is a DropDownList
Country.DataTextField = "Name";
Country.DataSource = countryQuery;
DataBind();

但是你如何使用“点”语法

来完成上述操作

var countryQuery = ShopEntities.ShippingCountries.OrderBy(s => s.Order).what to put here????

Country.DataValueField = "ShippingCountryId";
Country.DataTextField = "Name";
Country.DataSource = countryQuery;
DataBind();

Answer 1

请参阅LINQ How to select more than 1 property in a lambda expression?

基本上只是：


.Select(c => new { c.ShippingCountryId, c.Name }).ToList();

Answer 2

与orderBy

的方式相同

ar countryQuery = ShopEntities.ShippingCountries.OrderBy(s => s.Order).Select(s => new classref {ShippingCountryId = s.ShippingCountryId,Name = s.Name})

这一个

ar countryQuery = ShopEntities.ShippingCountries.OrderBy(s => s.Order).Select(s => new { s.ShippingCountryId, s.Name})

如何使用点语法将实体数据绑定到WebForm控件？

2 个答案: