blocks|key|5588913|text|假设您正在Winform中查看，该选项卡有一个SelectedIndexChanged事件|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5588914|现在，您可以在其中检查特定的选项卡并继续执行逻辑|5588915|private+void+tab1_SelectedIndexChanged(object+sender,+EventArgs+e)
{
+++++if+(tab1.SelectedTab+==+tab1.TabPages["tabname"])//your+specific+tabname
+++++{
+++++++++//+your+stuff
+++++}
}|code-block|syntax|javascript|5588916|entityMap^0|N|K|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

Assuming you are looking out in Winform, there is a <code>SelectedIndexChanged</code> event for the tab

Now in it you could check for your specific tab and proceed with the logic 

<pre><code>private void tab1_SelectedIndexChanged(object sender, EventArgs e)
{
 if (tab1.SelectedTab == tab1.TabPages["tabname"])//your specific tabname
 {
 // your stuff
 }
}
</code></pre>

blocks|key|5589029|text|要检查特定选项卡页是否是选项卡控件的当前选定页很容易；只需使用选项卡控件的SelectedTab属性：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5589030|if+(tabControl1.SelectedTab+==+someTabPage)
{
//+Do+stuff+here...
}|code-block|syntax|javascript|5589031|如果代码是基于某个事件而不是所选的选项卡页执行的，这会更有用(在这种情况下，SelectedIndexChanged将是更好的选择)。|5589032|例如，我有一个应用程序，它使用计时器通过TCP/IP连接定期轮询内容，但为了避免不必要的TCP/IP流量，我只轮询更新当前选定选项卡页中的GUI控件的内容。|5589033|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

To check if a specific tab page is the currently selected page of a tab control is easy; just use the SelectedTab property of the tab control:

<pre><code>if (tabControl1.SelectedTab == someTabPage)
{
// Do stuff here...
}
</code></pre>

This is more useful if the code is executed based on some event other than the tab page being selected (in which case SelectedIndexChanged would be a better choice). 

For example I have an application that uses a timer to regularly poll stuff over TCP/IP connection, but to avoid unnecessary TCP/IP traffic I only poll things that update GUI controls in the currently selected tab page.

blocks|key|1216491|text|在.Net+4中可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1216492|if+(tabControl1.Controls[5]+==+tabControl1.SelectedTab)
++++++++++++++++MessageBox.Show("Tab+5+Is+Selected");|code-block|syntax|javascript|1216493|或|1216494|if+(+tabpage5+==+tabControl1.SelectedTab)
+++++++++MessageBox.Show("Tab+5+Is+Selected");|1216495|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

in .Net 4 can use

<pre><code>if (tabControl1.Controls[5] == tabControl1.SelectedTab)
 MessageBox.Show("Tab 5 Is Selected");
</code></pre>

OR

<pre><code>if ( tabpage5 == tabControl1.SelectedTab)
 MessageBox.Show("Tab 5 Is Selected");
</code></pre>

blocks|key|5589119|text|无论出于什么原因，上述方法对我都不起作用。这就是所做的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5589120|if+(tabControl.SelectedTab.Name+==+"tabName"+)
{
+++++..+do+stuff
}|code-block|syntax|javascript|5589121|其中tabControl.SelectedTab.Name是在选项卡控件本身中分配给页面的名称属性。|5589122|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For whatever reason the above would not work for me. This is what did:

<pre><code>if (tabControl.SelectedTab.Name == "tabName" )
{
 .. do stuff
}
</code></pre>

where tabControl.SelectedTab.Name is the name attribute assigned to the page in the tabcontrol itself.

blocks|key|1218669|text|我认为使用event+tabPage1.Enter会更方便。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1218670|tabPage1.Enter+%2B=+new+System.EventHandler(tabPage1_Enter);

private+void+tabPage1_Enter(object+sender,+EventArgs+e)
{
++++MessageBox.Show("you+entered+tabPage1");
}|code-block|syntax|javascript|1218671|当您对不同的选项卡有不同的逻辑时，这比嵌套if-else语句要好。并且更适合于将来可能添加新标签的情况。|1218672|请注意，如果默认情况下加载窗体并打开tabPage1，则会触发此事件。|1218673|entityMap^0|B|E|0|0|0|I|8|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

I think that using the event <code>tabPage1.Enter</code> is more convenient. 

<pre><code>tabPage1.Enter += new System.EventHandler(tabPage1_Enter);

private void tabPage1_Enter(object sender, EventArgs e)
{
 MessageBox.Show("you entered tabPage1");
}
</code></pre>

This is better than having nested if-else statement when you have different logic for different tabs. And more suitable in case new tabs may be added in the future. 

Note that this event fires if the form loads and <code>tabPage1</code> is opened by default.

blocks|key|3974264|text|这也可以起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3974265|if+(tabControl.SelectedTab.Text+==+"tabText"+)
{
++++..+do+stuff
}|code-block|syntax|javascript|3974266|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This can work as well.

<pre><code>if (tabControl.SelectedTab.Text == "tabText" )
{
 .. do stuff
}
</code></pre>

I am making an event to check if specific tab page in a tab control is active.

The point is, it will trigger an event if that tab page in a tab control is the currently selected tab. Any code that will give me what I need?

Check if a specific tab page is selected (active)

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。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我正在创建一个事件来检查选项卡控件中的特定选项卡页是否处于活动状态。关键是，如果选项卡控件中的选项卡页是当前选定的选项卡，它将触发一个事件。有什么代码可以满足我的需求吗？

问检查是否选择了特定的选项卡页(活动)
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问检查是否选择了特定的选项卡页(活动)EN