本文介绍了选项卡的每个项目上的更改事件触发事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有火的标签控制变化事件，但是当被选择的选项卡中的项事件再次发射.
这是代码的一部分:>
i had fire the tab control change event but when an item of tabs is selected that event fired again.
here the some part of code:>
private void tabControl1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
else if (tabItem3.IsSelected)
{
comboBox2.Items.Clear();
OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\shafay\Documents\project001.accdb");
OleDbDataAdapter da = new OleDbDataAdapter("select DeptName from Department ", con);
DataTable dt = new DataTable();
da.Fill(dt);
for (int i = 0; i < dt.Rows.Count; i++)
{
comboBox2.Items.Add(dt.Rows[i]["DeptName"]);
}
}
}推荐答案
bool skipSelectionChangedEvent = false;
现在，在tabControl1_SelectionChanged事件处理程序中，如果布尔标志为true，则跳过代码的执行.
Now, in the tabControl1_SelectionChanged event handler, skip the execution of the code if the boolean flag is true.
if (skipSelectionChangedEvent) return;
并且在选择以编程方式设置的另一个TabPage之前
And before selecting another TabPage programmatically set
skipSelectionChangedEvent = true
//Select the Tab page
//Reset the boolean flag to false to enable the SelectionChanged event
skipSelectionChangedEvent = false
希望对您有所帮助.
I hope this may be helpful.
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