How to add a name at index 0 in comboBox when comboBox in bind with Database

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I have a ComboBox which is bind by Query(with Database) when new window call(that means constructor). Now I want to add "Select" at index 0.so how can i add ??
I used

ComboBox1.Text="--Select--"

but it is not working.
then i tried

if (cmbGroup.Items.Count > 0)
           {
               cmbGroup.Items.Insert(0, "Select Item");
               cmbGroup.SelectedIndex = 0;
           }

or

cmbGroup.Items.Insert(0, "Select Item");
cmbGroup.SelectedIndex = 0;

but it gives an exception that is- Operation is not valid while ItemSource is in use. Access and Modify elements with ItemsControl.ItemSource instead. so what can i do ??

Posted 11-Feb-15 20:42pm

J{0}Y

Updated 11-Feb-15 23:32pm

v2

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Deepu S Nair · Answer 1 · 2015-02-11T20:52:00

Solution 1

check this

How to display -Select- by default in combobox in windows application[^]

Posted 11-Feb-15 20:52pm

Deepu S Nair

Comments

J{0}Y 12-Feb-15 5:33am

i updated my question please check.

J{0}Y 12-Feb-15 6:46am

suggest answer according linq to sql because i m using linq to sql

nirav raval · Answer 2 · 2015-02-11T23:41:00

Solution 2

you should get the value from the Source only if you using the Databound method.

best thing you can do is, use union in sql for getting your desired value at top

like

SQL

select id, name from emp
union all
select 0, '--Select Any--'
order by id

Posted 11-Feb-15 23:41pm

nirav raval

Comments

J{0}Y 12-Feb-15 5:59am

how to write this query in linq to sql ??