blocks|key|3989969|text|你可以从SelectedIndex那里得到listView。无需遍历所有项，因为根据您的代码，您似乎对任何选定项的索引感兴趣。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3989970|var2+=+ListView1.SelectedIndex;|code-block|syntax|javascript|3989971|或|3989972|简单地说，如果只对第一个索引感兴趣，这将有效：|3989973|if+(lst.SelectedItems.Count+>+0)
{
++++var2+=+lst.Items.IndexOf(lst.SelectedItems[0]);
}|3989974|entityMap^0|4|D|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|X|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

You can get <code>SelectedIndex</code> from listView. No need to traverse over all items because as per your code you seems to be interested in index of any selected item.

<pre><code>var2 = ListView1.SelectedIndex;
</code></pre>

OR

simply this will work if interested in only first index:

<pre><code>if (lst.SelectedItems.Count &gt; 0)
{
 var2 = lst.Items.IndexOf(lst.SelectedItems[0]);
}
</code></pre>

blocks|key|2370918|text|如果使用的是.NET紧凑型框架，则不支持SelectedIndex。对于一般的解决方案，我更喜欢SelectedIndices|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2370919|ListView.SelectedIndexCollection+indices+=+lst.SelectedIndices;
if+(indices.Count+>+0)
{
++++//+Do+something+with+indices[0]
}|code-block|syntax|javascript|2370920|entityMap^0|K|D|1C|F|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

If you are using the .NET Compact Framework, <code>SelectedIndex</code> is not supported. For a general solution, I prefer <code>SelectedIndices</code>:

<pre><code>ListView.SelectedIndexCollection indices = lst.SelectedIndices;
if (indices.Count &gt; 0)
{
 // Do something with indices[0]
}
</code></pre>

blocks|key|3989994|text|对于Visual+2015，SelectedIndex似乎不可用。相反，您可以使用SelectedIndices[x]，其中x=0将为您提供第一个选定的项：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3989995|listView.SelectedIndices[0]|code-block|syntax|javascript|3989996|还可以将MultipleSelect属性设置为false，一次只允许选择一个项。|3989997|entityMap^0|E|D|15|I|1Q|3|0|0|4|E|N|5|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

For Visual Studio 2015, <code>SelectedIndex</code> does not seem to be available. Instead, you can use <code>SelectedIndices[x]</code> where <code>x=0</code> will give you the first selected item:

<pre><code>listView.SelectedIndices[0]
</code></pre>

You can also set the <code>MultipleSelect</code> property to <code>false</code> to only allow one item to be selected at a time.

blocks|key|2370930|text|它可以返回NULL。另外，SelectedIndexChanged事件可以被触发两次。第一次，还没有任何选择。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2370931|所以找到它的唯一安全方法是这样的：|2370932|++++private+void+lv1_SelectedIndexChanged(object+sender,+EventArgs+e)
++++{
++++++++if+(lv1.FocusedItem+==+null)+return;
++++++++int+p+=+lv1.FocusedItem.Index;|code-block|syntax|javascript|2370933|..。现在int+p有正确的值..。|2370934|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It can return NULL. Also the SelectedIndexChanged event can be FIRED TWICE. And the first time, there nothing selected yet.

So the only safe way to find it is like this:

<pre><code> private void lv1_SelectedIndexChanged(object sender, EventArgs e)
 {
 if (lv1.FocusedItem == null) return;
 int p = lv1.FocusedItem.Index;
</code></pre>

... now int p has the correct value...

blocks|key|3964579|text|sColl.Clear();
string+item+=+String.Empty;

if+(listView1.SelectedItems.Count+>+0)+{
++++for+(int+i+=+0;+i+<+listView1.SelectedItems.Count;+i%2B%2B)+{
++++++++if+(listView1.SelectedItems[i].Selected)+{
++++++++++++int+i2+=+listView1.SelectedItems[i].Index;
++++++++++++item+=+listView1.Items[i2].Text;
++++++++++++sColl.Add(item);
++++++++}
++++}
}

listView1.SelectedItems.Clear();
foreach+(var+itemS+in+sColl)
{
++++string+items+=+itemS;
}
+sColl.Clear();
listView1.SelectedItems.Clear();|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3964580|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>sColl.Clear();
string item = String.Empty;

if (listView1.SelectedItems.Count &gt; 0) {
 for (int i = 0; i &lt; listView1.SelectedItems.Count; i++) {
 if (listView1.SelectedItems[i].Selected) {
 int i2 = listView1.SelectedItems[i].Index;
 item = listView1.Items[i2].Text;
 sColl.Add(item);
 }
 }
}

listView1.SelectedItems.Clear();
foreach (var itemS in sColl)
{
 string items = itemS;
}
 sColl.Clear();
listView1.SelectedItems.Clear();
</code></pre>

blocks|key|3990029|text|为什么不把SelectedIndex带回来？在当前命名空间之后添加此扩展名。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3990030|public+static+class+Extension
{
++++public+static+int+SelectedIndex(this+ListView+listView)
++++{
++++++++if+(listView.SelectedIndices.Count+>+0)
++++++++++++return+listView.SelectedIndices[0];
++++++++else
++++++++++++return+0;
++++}
}|code-block|syntax|javascript|3990031|将这个类封装在一个名为扩展的名称空间中，然后在您的项目命名空间中添加这个类以使用扩展。|3990032|++using+Extensions;|3990033|然后像这样简单地使用|3990034|+++private+void+ListView1_SelectedIndexChanged(object+sender,+EventArgs+e)
++++{
++++++++int+selectionindex+=+ListView1.SelectedIndex();
++++++++ListViewItem+seletedItem+=+ListView1.Items[selectionindex];+++++++++++
++++}|3990035|扩展方法应该返回-1+on+Else，但是只要您从SelectedIndexChanged事件中使用它，就可以了，因为如果没有条目，它就不会被触发。这是设计的，因为SelectedIndexChanged事件会被触发两次。一次取消选择初始项，然后选择新项。正确的方法是返回-1并检查是否为负数。这也是为什么这里有人得到和ArgumentOutOfRange异常。|3990036|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Why don't bring back the SelectedIndex ? Add this extension after your current namespace.

<pre><code>public static class Extension
{
 public static int SelectedIndex(this ListView listView)
 {
 if (listView.SelectedIndices.Count &gt; 0)
 return listView.SelectedIndices[0];
 else
 return 0;
 }
}
</code></pre>

Encapsulate this class in a namespace called Extensions and then add this inside your projects namespace to use the extension.

<pre><code> using Extensions;
</code></pre>

Then simply use like this

<pre><code> private void ListView1_SelectedIndexChanged(object sender, EventArgs e)
 {
 int selectionindex = ListView1.SelectedIndex();
 ListViewItem seletedItem = ListView1.Items[selectionindex]; 
 }
</code></pre>

P.S.
The extension method should have returned -1 on Else, but as long as you're using it from the SelectedIndexChanged event, you're fine as it won't get fired if there are no items. 
This is by design, as the SelectedIndexChanged event gets fired twice. Once to deselect the initial item, then to select the new one.
Proper way is to return -1 and check for negative numer.
This is also why someone here got and ArgumentOutOfRange Exception.

I've been searching for about an hour already and couldn't find a best solution.
I am migrating from VB.NET to C# Forms and to C# WPF.
Never mind that...
so I use this code for C# forms and it works, but not in C# WPF

<pre><code> if (ListView1.SelectedItems.Count &gt; 0)
 {
 for (lcount = 0; lcount &lt;= ListView1.Items.Count - 1; lcount++)
 {
 if (ListView1.Items[lcount].Selected == true)
 {
 var2 = lcount;
 break;
 }
 }
 }
</code></pre>

this is the way I want to get the index of the item clicked in listbox.
I have the error in .SELECTED

please help.

Get the index of Item selected in ListView

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经找了一个小时了，找不到最好的解决办法。我正在从VB.NET迁移到C#窗体和C# WPF。算了吧..。因此，我为C#窗体使用了这段代码，它可以工作，但在C# WPF中不起作用。 if (ListView1.SelectedItems.Count > 0) { for (lcount = 0; lcount <= ListView1.Items

问获取在ListView中选择的项的索引
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