Why selected index change on adding data source?

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Whenever we add data source to combobox with code below.

comboBoxBusNo.DataSource = busNo.Tables[0];
            comboBoxBusNo.DisplayMember = "BusId";
            comboBoxBusNo.ValueMember = "Id";

Why

private void comboBoxBusNo_SelectedIndexChanged(object sender, EventArgs e)

event is called. How we can stop this to be called at loading.

Posted 31-Mar-14 19:47pm

Chetan Saini

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Er. Puneet Goel · Answer 1 · 2014-03-31T21:18:00

Solution 1

Hi Chetan Saini

Whenever you bind the data to any control, what is does is re-initialize the index and values. That's why it fires this selectedindexchange event.

Posted 31-Mar-14 21:18pm

Er. Puneet Goel

Comments

Chetan Saini 1-Apr-14 3:23am

How to stop calling select index change event on load.

Er. Puneet Goel 1-Apr-14 5:41am

this is default behavior, if you want to set the selected index as it was selected before load, you can save the value to some hidden label and once bounded then reassign that.