从列表视图中选择项目并投射到我的自定义对象 [英] select item from listview and cast to my custom object

问题描述

我正在尝试从列表视图中选择对象，并将其转换为这样的自定义对象

I'm trying to select object from listview and cast to my custom object like this

MyObject foo = (MyObject)MyListView.SelectedItems[0];

但这是我的编译错误

错误4无法将类型'System.Windows.Forms.ListViewItem'转换为
'MyObject'

Error 4 Cannot convert type 'System.Windows.Forms.ListViewItem' to 'MyObject'

推荐答案

默认 ListView 是不可数据绑定的（即，您不能将某些对象分配为列表视图的数据源）。它包含 ListViewItem 对象，这些对象不能转换为您的数据类型。这就是为什么出现此错误的原因。

Default ListView is not data-bindable (i.e. you can't assign some objects as data source of list view). It contains ListViewItem objects, which cannot be casted to your data type. That's why you getting this error.

如果要从 ListViewItem 获取自定义对象，则需要构造从 ListViewItem

If you want to get your custom object from ListViewItem then you need to construct it manually from ListViewItem:

ListViewItem item = (MyObject)MyListView.SelectedItems[0];
MyObject foo = new MyObject();
foo.FirstName = item.Text;
foo.LastName = item.SubItems[1].Text;
foo.Age = Int32.Parse(item.SubItems[2].Text);

或者您可以将自定义对象存储在 Tag 中 ListViewItem 的属性并将其取回：

OR you can store custom object in Tag property of ListViewItem and get it back:

ListViewItem item = (MyObject)MyListView.SelectedItems[0];
MyObject foo = (MyObject)item.Tag;

BTW考虑使用 DataGridView 支持绑定

BTW consider to use DataGridView which supports binding.

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