C# accessÈÕÆÚ²éѯ¼Ó#

C# accessÈÕÆÚ²éѯ¼Ó#
if (((string)((ComboBoxItem)cmbField.SelectedItem).Value).Equals("System.DateTime"))
{
                    //ÅжÏÈÕÆÚµÄ;
                
                    if (checkBox1.Checked == true)
                    {
                        value = "#" + cmbValue.SelectedItem.ToString().Trim() + "#";
                    }
}