寻找解决DataGridView控件无法绑定到分层（OO）数据的方法 [英] Looking for work-around for inability of DataGridView control to bind to hierarchical (OO) data

问题描述

看来，DataGridView控件只能绑定到平面的数据源（所有属性都是主要类型）。我的数据是分层的。例如：

It would seem that the DataGridView control can only bind to data sources that are flat (all the Properties are primative types). My data is hierarchal. For example:

    interface INestedObj
{
    string Prop3 { get; }
}

interface IParentObj
{
    public string Prop1 { get; }
    public string Prop2 { get; }
    public INestedObj NestedObj { get; }
}

给定这个，如何绑定一个实现IParentObj的对象？最终你必须做这样的事情：

Given this, how does one bind to an object implementing IParentObj? Eventually you are faced with having to do something like this:

grid.Columns["prop1Col"].DataPropertyName = "Prop1";
grid.Columns["prop2Col"].DataPropertyName = "Prop2";

grid.Columns["prop3Col"].DataPropertyName = "How to display Prop3?";

grid.Columns["prop3Col"].DataPropertyName = "NestedObj.Prop3"; // does not work

我正在寻找建议和/或解决方法。

I am looking for advice and/or work-arounds.

TIA

推荐答案

这是一个简单的解决方案，一个很长的一天。

Here is a simple solution that came to me at the end of a long day.

我使用Linq查询和投影来创建一个匿名类型，在DataGridView中显示正确的信息。

I used a Linq query and projection to create an anonymous type that displays the proper information in the DataGridView.

var query = from pt in parentObjCollection
  select new {Prop1=pt.Prop1, Prop2=pt.Prop2, NestedObj.Prop3=pt.NestedObj.Prop3};

我必须提供适当的值（NestedObj.Prop3）到DataPropertyName属性来获取值在网格中显示。

I had to supply the proper value (NestedObj.Prop3) to the DataPropertyName property to get the value to display in the grid.

当我有更多的时间要尝试和实施Bradley的解决方案。

When I have more time I am going to try and implement Bradley's solution.

这篇关于寻找解决DataGridView控件无法绑定到分层（OO）数据的方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！