After data-binding, do this: ddl_state.Items.Insert(0, new ListItem("Select","NA"). Or add it in markup as: <asp:DropDownList . ... <看更多>

In this article i will show you, How to add default item in DropdownList When DropdownList bind with ... ... <看更多>

Hi, I am new to Serenity platform , I have a dropdown which is dynamically populated based upon a database entity. ... <看更多>

Then you MUST validate via javascript, etc. so that the form isn't submitted if the value is blank. This avoids getting any kludgy results and ... ... <看更多>