Combobox first values should be null
<p>Using C# &amp; MYSQL</p>

<p>Using Combobox in my webpage, in a combobox i want to display a null values first, then it should display all values..</p>

<p>For Example</p>

<pre><code>Combobox.item = null values
combobox.item = 1
Combobox.item = 2
....,
</code></pre>

<p>Code</p>

<pre><code>cmd = new OdbcCommand("Select vehicleno as vehicleno from tb_car", con);
        ada = new OdbcDataAdapter(cmd);
        ada.Fill(data1);
        cmbvnoview.DataValueField = "vehicleno";
        cmbvnoview.DataSource = data1;
        cmbvnoview.DataBind();
</code></pre>

<p>Above code is working, but is displaying all the values, first it should display a null value, then it should display all the values.</p>

<p>How to modify my code....</p>

<p>Need Code Help</p>
