How to add a default Select option to this ASP NET DropDownList control

Question

I am a new ASP NET developer and I am trying to learn Linq-To-Entities  I am trying to bind a DropDownList with the Linq statement for retrieving the list of status in the Status Entity  Everything is working fine  However  I am trying now to add  Select  option to the DropDownList but It doesn t work with me   Could you please tell me how to fix this   ASP NET Code    lt asp DropDownList ID  DropDownList1  runat  server  AutoPostBack  True                  OnSelectedIndexChanged  DropDownList1 SelectedIndexChanged  gt    Code-Behind   protected void Page Load object sender  EventArgs e                if   IsPostBack                        DropDownList1 Items Add new ListItem  Select    0   true                bindStatusDropDownList                     private void bindStatusDropDownList                 Status status   new Status            DropDownList1 DataSource   status getData            DropDownList1 DataValueField    ID           DropDownList1 DataTextField    Description           DropDownList1 DataBind            UPDATE   I also tried to do in the markup set of the DropDownList but it did not work too with me   lt asp DropDownList ID  DropDownList1  runat  server  AutoPostBack  True                  OnSelectedIndexChanged  DropDownList1 SelectedIndexChanged  gt                       lt asp ListItem Selected  True  Value  0  Text  Select  gt  lt  asp ListItem gt               lt  asp DropDownList gt

User · Answer

If you do an  Add  it will add it to the bottom of the list   You need to do an  Insert  if you want the item added to the top of the list

User · Answer

Private Sub YourWebPage PreRenderComplete sender As Object  e As EventArgs  Handles Me PreRenderComplete       If Not IsPostBack Then      DropDownList1 Items Insert 0   Select        End If  End Sub

User · Answer

If you want to make the first item unselectable  try this   DropDownList1 Items Insert 0  new ListItem  Select    -1     DropDownList1 Items 0  Attributes Add  disabled    disabled

User · Answer

Although it is quite an old question  another approach is to change AppendDataBoundItems property  So the code will be    lt asp DropDownList ID  DropDownList1  runat  server  AutoPostBack  True                    OnSelectedIndexChanged  DropDownList1 SelectedIndexChanged                    AppendDataBoundItems  True  gt        lt asp ListItem Selected  True  Value  0  Text  Select  gt  lt  asp ListItem gt   lt  asp DropDownList gt

User · Answer

I have tried with following code  it s working for me fine  ManageOrder Order   new ManageOrder    Organization DataSource   Order getAllOrganization Session  userID   ToString     Organization DataValueField    OrganisationID   Organization DataTextField    OrganisationName                   Organization DataBind                    Organization Items Insert 0  new ListItem  Select Organisation    0

User · Answer

The reason it is not working is because you are adding an item to the list and then overriding the whole list with a new DataSource which will clear and re-populate your list  losing the first manually added item   So  you need to do this in reverse like this   Status status   new Status    DropDownList1 DataSource   status getData    DropDownList1 DataValueField    ID   DropDownList1 DataTextField    Description   DropDownList1 DataBind        Then add your first item DropDownList1 Items Insert 0   Select

User · Answer

Move DropDownList1 Items Add new ListItem  Select    0   true    After bindStatusDropDownList     so       if   IsPostBack                bindStatusDropDownList      first create structure         DropDownList1 Items Add new ListItem  Select    0   true       after add item

[c#] How to add a default "Select" option to this ASP.NET DropDownList control?

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