是否将ListView项目转换为List< string&gt ;? [英] Cast ListView Items to List<string>?

问题描述

如何将ListView.Items强制转换为List<string>?

这是我尝试过的:

List<string> list = lvFiles.Items.Cast<string>().ToList();

但我收到此错误:

无法将类型为"System.Windows.Forms.ListViewItem"的对象转换为类型为"System.String".

Unable to cast object of type 'System.Windows.Forms.ListViewItem' to type 'System.String'.

推荐答案

ListViewItemCollection的确切含义是-一个ListViewItem元素的集合.它不是字符串的集合.您的代码在执行时失败，原因与该代码在编译时失败的原因相同:

A ListViewItemCollection is exactly what it sounds like - a collection of ListViewItem elements. It's not a collection of strings. Your code fails at execution time for the same reason that this code would fail at compile time:

ListViewItem item = lvFiles.Items[0];
string text = (string) item; // Invalid cast!

如果想要一个字符串列表，每个字符串都取自ListViewItem的Text属性，则可以轻松地做到这一点:

If you want a list of strings, each of which is taken from the Text property of a ListViewItem, you can do that easily:

List<string> list = lvFiles.Items.Cast<ListViewItem>()
                                 .Select(item => item.Text)
                                 .ToList();

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