如何在.NET 2.0 ListView 中全选/全选？

发布于 2024-07-05 16:07:50 字数 828 浏览 9 评论 0原文

在不使用以下内容的情况下选择列表视图中的所有项目或不选择任何项目的好方法是什么：

foreach (ListViewItem item in listView1.Items)
{
 item.Selected = true;
}

或者

foreach (ListViewItem item in listView1.Items)
{
 item.Selected = false;
}

我知道底层 Win32 列表视图公共控件支持 LVM_SETITEMSTATE 消息，您可以使用它来设置选定状态，并通过传递 -1 作为索引，它将应用于所有项目。我不想向恰好位于 .NET Listview 控件后面的控件发送 PInvoking 消息（我不想成为一个糟糕的开发人员并依赖未记录的行为 - 当他们将其更改为完全托管的 ListView 类时）

凹凸

伪受虐狂有< strong>SelectNone 情况：

ListView1.SelectedItems.Clear();

现在只需要 SelectAll 代码

原文

What is a good way to select all or select no items in a listview without using:

foreach (ListViewItem item in listView1.Items)
{
 item.Selected = true;
}

foreach (ListViewItem item in listView1.Items)
{
 item.Selected = false;
}

I know the underlying Win32 listview common control supports LVM_SETITEMSTATE message which you can use to set the selected state, and by passing -1 as the index it will apply to all items. I'd rather not be PInvoking messages to the control that happens to be behind the .NET Listview control (I don't want to be a bad developer and rely on undocumented behavior - for when they change it to a fully managed ListView class)

Bump

Pseudo Masochist has the SelectNone case:

ListView1.SelectedItems.Clear();

Now just need the SelectAll code

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凹づ凸ル 2024-07-12 16:07:51

哇，这很旧了... :D

SELECT ALL

 listView1.BeginUpdate(); 
 foreach (ListViewItem i in listView1.Items)
 {
     i.Selected = true;
 }
 listView1.EndUpdate();

SELECT INVERSE

 listView1.BeginUpdate(); 
 foreach (ListViewItem i in listView1.Items)
 {
     i.Selected = !i.Selected;
 }
 listView1.EndUpdate();

BeginUpdate 和 EndUpdate 用于禁用/启用控件在更新其内容时重绘...我认为它会更快地选择所有内容，因为它只会刷新一次，而不是 listView.Items.Count 次。

Wow this is old... :D

SELECT ALL

 listView1.BeginUpdate(); 
 foreach (ListViewItem i in listView1.Items)
 {
     i.Selected = true;
 }
 listView1.EndUpdate();

SELECT INVERSE

 listView1.BeginUpdate(); 
 foreach (ListViewItem i in listView1.Items)
 {
     i.Selected = !i.Selected;
 }
 listView1.EndUpdate();

BeginUpdate and EndUpdate are used to disable/enable the control redrawing while its content is being updated... I figure it would select all quicker, since it would refresh only once, and not listView.Items.Count times.

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