search in combobox while typing using wildcard character % in c#
<p>I want to use wildcard character <code>'%'+Text'%'</code>, but it doesn't work at all. The dropped down list is always showing kind of that form <code>Text+'%'</code></p>

<p>Here is my code</p>

<pre><code>    private void cboEmp_TextChanged(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(cboEmp.Text.Trim()))
            cboEmp.SelectedIndex = cboEmp.FindStringExact('%'+cboEmp.Text+'%');
    }
</code></pre>