从对象包含相关领域的子对象将数据绑定到一个GridView [英] Binding data to a GridView from a Object with child objects containing relevant fields

问题描述

我有一个包含在我给作为数据源到GridView。（我目前使用绑定列的列）其他对象的复杂对象的名单。我需要在运行时间内将数据绑定到从对象的列。如何才能做到这一点？

I have a List of complex objects containing other objects within that I give as the data source to a gridview.(currently I'm using BoundFields for the columns). I need to bind data to the columns from the objects within at run time. How can this be done?

推荐答案

使用LINQ的投影压平（denormalise）的实体图。您可以创建一个新的视图模型键入类，或者绑定到一个匿名类，像这样：

Use a LINQ projection to flatten (denormalise) the entity graph. You can either create a new ViewModel type class, or alternatively bind to an anonymous class, something like this:

var viewList = (
   from entity in entityList
       select new
       {
           Field1 = entity.Field1,
           Field2 = entity.Relation.AnotherField,
           Field3 = entity.Field3 + entity.Relation.YetAnotherField
       }).ToList();
myGridView.DataSource = viewList;
myGridView.DataBind();

使用字段1 ，字段2 在 GridView控件属性对于数据绑定。

Use Field1, Field2 on the GridView properties for the data bindings.

修改

以上预测，在lambda语法：

The above projection, in Lambda syntax:

var viewList = entityList
    .Select(entity => new
       {
           Field1 = entity.Field1,
           Field2 = entity.Relation.AnotherField,
           Field3 = entity.Field3 + entity.Relation.YetAnotherField
       })
   .ToList();

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