selection Change event fired event on each item of tab

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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:>

C#

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"]);
        }
    }
}

Posted 28-Apr-12 5:02am

Arsalaan Ahmed

Updated 28-Apr-12 5:12am

VJ Reddy

v2

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VJ Reddy 28-Apr-12 11:12am

Edit: pre tag for C# code added.

1 solution

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VJ Reddy · Answer 1 · 2012-04-28T05:21:00

In the code given in the question, it is not clear where the TabPage is being selected. However, when a TabPage is selected either programmatically or through the UI, the SelectionChanged event will be fired. As a work around, a public field may be declared in the form as a boolean flag say

C#

bool skipSelectionChangedEvent = false;

Now, in the tabControl1_SelectionChanged event handler, skip the execution of the code if the boolean flag is true.

C#

if (skipSelectionChangedEvent) return;

And before selecting another TabPage programmatically set

C#

skipSelectionChangedEvent = true
//Select the Tab page
//Reset the boolean flag to false to enable the SelectionChanged event
skipSelectionChangedEvent = false

I hope this may be helpful.