从数据视图C＃中获得价值 [英] Getting Value from DataView C#

问题描述

如何从DataView.CurrentItem找到一些列的值。

How to find a value of some column from DataView.CurrentItem.

推荐答案

由于保罗指出，在他的评论，有一个在 CurrentItem 成员>数据视图类。

As Paul pointed out in his comment, there is no CurrentItem member in the DataView class.

如果您知道该项目的索引，你可以通过它的名称，如下所示访问列：

If you know the index of the item, you can access a column by its name as shown below :

string name = dataView[index]["Name"] as string;

同样，如果您有实例的 DataRowView的，你可以做（​​的的DataRow 视图）即：

Similarly, if you have an instance of a DataRowView (a view of a DataRow), you can do that :

string name = dataRowView["Name"] as string;

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编辑：我只注意到了WPF标记上你的问题......也许你是在谈论一个的CollectionView ，不是数据视图？

I just noticed the WPF tag on your question... perhaps you're talking about a CollectionView, not DataView ?

的CollectionView 没有列本身，而是它可以重新psented在的GridView 或的DataGrid （两者都列）。这只是一个欣赏对象的集合。访问当前对象的特定字段或属性，有两个主要的选项：

CollectionView doesn't have "columns" per se, but it can be represented in a GridView or DataGrid (which both have columns). It's just a view over a collection of objects. To access a specific field or property of the current object, there are two main options :

• 如果您静态地知道藏品的实际类型：投 CurrentItem 该类型，并直接访问您需要的成员
• 如果您不知道类型，你可以使用反射在CurrentItem通过名称来访问它的属性或字段

• if you statically know the actual type of the collection items : cast the CurrentItem to that type, and directly access the members you need
• if you don't know the type, you can use reflection on the CurrentItem to access its properties or fields by name

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