Blank line in DropDown List box

I have a case where I want to add a blank entry in a drop down list box that is bound to a database table. I want the blank to be the default, then the user can select the bound values if desired. How do I do this without binding the drop down box to a prepopulated array?

Hi
Go to the JSP source of that page and add
<f:selectItem itemLabel="None" itemValue="0"/> before
the line <f:selectItems binding="#{Page1.dropdown1SelectItems}" ....
With this you can deselect the previous selection by selecting None from the dropdown list. You can also use blank spaces instead of None.
Thanks
Srinivas

Similar Messages

  • Dropdown list boxes

    Hi friends,
    Could u please tell me how to create a module pool program to charge the content of a a field of database table in a Dropdown list boxes . Please provide me step by step Process or link of file.
    thinks .

    Hi Karim,
    see the below programs to fill the field with a valid listbox value, for example, in this program, I am building the listbox in the program and just assign P_FIELD a valid value from internal table'ivrm_values' . Create screen 100 and create a field call P_FIELD, make sure to select "ListBox" from the DropDown Field.
    report  zpavan_0001.
    type-pools: vrm.
    data: p_field(20) type c.
    data: ivrm_values type vrm_values.
    data: xvrm_values like line of ivrm_values.
    data: name type vrm_id.
    start-of-selection.
    Set default value, before calling the screen
      p_field = 'DEF'.
      call screen 100.
    *&      Module  STATUS_0100  OUTPUT
          text
    module status_0100 output.
    SET PF-STATUS 'xxxxxxxx'.
    SET TITLEBAR 'xxx'.
    name = 'P_FIELD'.
      xvrm_values-key = 'ABC'.
      xvrm_values-text = 'ABC'.
      append xvrm_values to ivrm_values.
      xvrm_values-key = 'DEF'.
      xvrm_values-text = 'DEF'.
      append xvrm_values to ivrm_values.
      xvrm_values-key = 'GHI'.
      xvrm_values-text = 'GHI'.
      append xvrm_values to ivrm_values.
      call function 'VRM_SET_VALUES'
           exporting
                id     = name
                values = ivrm_values.
    endmodule.                 " STATUS_0100  OUTPUT
    *&      Module  USER_COMMAND_0100  INPUT
          text
    module user_command_0100 input.
    endmodule.                 " USER_COMMAND_0100  INPUT
    Thanks and Regards,
    Pavankumar

  • How to read the selected value of a dropdown list box

    Hello,
    I have 2 custom fields which are of type dropdown list on Accounts(CRMM_ACCOUNT) PCUI application details tab.I need to read the selected value of first dropdown list item,based on that second dropdown list will be populated.
    I know where to populate the dropdown list box,it is in FILL_DROPDOWN_LISTBOX.
    I dont know how to trap the selection made on dropdown list.
    PLease guide me on how to trap the dropdown list field selection value.
    Thanks in advance.
    Thirumala.

    Hello,
    Check what is done in standard for the fielf REGION which is inked to the country.
    Otherwise, you can do the following :
    - in field group customizing, for field 1, flag the 'send request' flag. So, when you change the value in this field via the dropdown, the MAC methods are immediately called.
    - Put the new value in a global variable (GV).
    - in the fill_dropdown_listbox method, get the value from this GV and based on it, filter the values for the dropdown of field 2.
    Hope this will help you,
    Regards,
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  • Is it possible to enter our own value in dropdown list box in Module Pool. How?

    Dear Experts,
    Being new to ABAP, I am trying my hands on Dropdownlist box on Module Pool.
    I want to pull data from Ztable(Custom Table) into Dropdown list box on Screen in Module pool and be able to edit it, delete it and enter new data through it, thus thereby able to manage the Ztable. Is it possible in dropdown.
    Looking forward for experts advice.
    Regards
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    Dear Kannan,
    Thanks. But why sud I write an event in Table maintenance generator. My code is in Module Pool and it has no connection with Table Msintenance.
    The I/O field Drop down list box is on the Screen in my Module Pool. I am able to pull data in it from Ztable but now I want to edit this pulled data and also want to enter new data in this dropdown list box.
    Regards
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  • Selected value in dropdown list box

    hi forums,
      how to capture the selected value in drop down list box and how it will link with the table.
    layout:
        <htmlb:dropdownListBox  id = "d1%>"
                                nameOfKeyColumn = "vbeln"
                              nameOfValueColumn = "vbeln"
                             table       = "<%=it_sales%>" />
    in dropdown list box,how do i capture the selected values.
    OnInitialization:
    Select vbeln from vbak
      into corresponding fields of table it_sales.
    regards,
    ravi.

    hi Ravikiran,
       In button even,we r mension the event_type = 'click'.
    but in dropdownListBox what is the event_type.
    i tryed like this.
    DATA : EVENT TYPE REF TO CL_HTMLB_EVENT.
    ***this is for button************
    *event = CL_HTMLB_MANAGER=>get_event( RUNTIME->SERVER->REQUEST ).
    *IF event->NAME = 'button' AND event->event_TYPE = 'click'.
    DATA : button_event TYPE REF TO CL_HTMLB_EVENT_BUTTON.
    button_event ?= event.
    *ENDIF.
    *********this is for dropdownListBox**********
      event = CL_HTMLB_MANAGER=>get_event( runtime->server->request ).
      IF event->name = 'dropdownListBox' AND event-         >event_type = 'selection'.
           DATA :  dd_listbox_event TYPE REF TO CL_HTMLB_EVENT_SELECTION.
           dd_listbox_event ?= event.
    CASE EVENT->ID.
    when 'id1'.
    CALL METHOD REQUEST->GET_FORM_FIELD
          EXPORTING
            NAME  = 'id1'
          RECEIVING
            VALUE = SEL.
    WHEN 'myButton'.
       CALL METHOD REQUEST->GET_FORM_FIELD
         EXPORTING
           NAME  = 'id1'
         RECEIVING
           VALUE = SEL.
    ENDCASE.
    endif.
    with regards,
    ravi.

  • Filtering values in a dropdown list box

    Hello Team
    In the BSP application CRM_IC, we want a drop down list box to be filled based on the entry selected from another dropdown list box. We have all the entries for the second drop down box in ABAP internal table .However, we do not want a server round trip to happend in doing so. Thus we have used the attribute 'Onclientselect' and we are trying to call a java script function call on this event to filter this ABAP internal table . In this function, we would like to fill the contents of the second dropdown list box after reading the contents of the first dropdown list box. Please advice us as to how this can be achieved. Basically, we observed that ABAP server side script is not executed in the java function.
    Thanks
    Rony

    Rony,
    I have used the following technique to synchronize the
    contents of two drop down list boxes.
    <b>Scenario:</b>
    The selection in listbox ddlbxSystemEquipNum, which I
    will call "A", determines the contents of listbox
    ddlbxModuleEquipNum, which I will call "B".
    I use a JavaScript array to shadow the ABAP internal
    table containing the possible values for listbox B.
    When the page is initially displayed, listbox B is
    populated from the ABAP internal table.
    When a new selection is made in listbox A, I use the
    onClientSelect event to call a JavaScript function,
    updateModuleList(), to update the contents of listbox B
    from the JavaScript shadow array based on the selected
    value in listbox A.
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    <u>Declare the JavaScript shadow array and listbox B update function</u>
    <script language="javascript" type="text/javascript">
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            var selModule = frmNrg1100.ddlbxModuleEquipNum;
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            selModule.options.length = 0;
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            var j = 0;
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    loop...
            wa_module_options-system   = wa_customer_tool-equipment_num_t.
            wa_module_options-text     = tool_list_text.
            wa_module_options-value    = wa_customer_tool-equipment_num_m.
            wa_module_options-selected = selected.
            append wa_module_options to module_options.
    %>
    <script language="javascript" type="text/javascript">
        // Add all possible Module select options to a JavaScript array of objects
        moduleArray[moduleArray.length] = {  system:"<%=wa_module_options-system %>",
                                               text:"<%=wa_module_options-text %>",
                                              value:"<%=wa_module_options-value %>",
                                           selected:"<%=wa_module_options-selected %>" } ;
    </script>
    <%
    endloop.
    %>
    Hope this helps.
    Regards,
    Shawn

  • LiveCycle 8.1 on Vista: dropdown list box doesn't show all values

    On Vista Business O/S, in LiveCycle 8.1, I am using a dropdown list for 254 items, not dynamically loaded (all values are declared in the definition of the object). When the form runs, the dropdown list appears. I can scroll through the list. However, the scroll stops short, never showing the last few items on the list.<br /><br />   Is there some limit I have exceeded or is there some know bug I have encountered or is there some other action I need to take so I can choose any item from the dropdown list?<br /><br />   Dropdown list box is defined as user-entered - optional, default <none>.<br />254 text items, longest item is 19 characters, average item is 10 characters long. <br /><br />   Thanks in advance for any help, hints, or tips you provide.<br /><br />Dr. Dave Dyer

    Dear Friends....
    it seems to be a bug of the SQL Server Data Tools, (SQL Server 2012 SP2)... I did the deploy of my Dashboard, (and details Reports), to my Test Reporting Services Server.. and everything works as expected....
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  • Me21n change line item dropdown list value

    hi experts,
    i have a requirement to automatically remove the aulty po line item when user click on CHECK or SAVE button, i done this by removing the record from ETT[] and POT[] at ENHANCEMENT-POINT mm06ef0p_pruefen_01 SPOTS es_mm06ef0p_pruefen INCLUDE BOUND.
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    or you all have some other suggestion?
    please help... i need it urgently coz i have been solving the problem for 2 weeks....
    thanks a lot

    Hi,
    generally it's not a good idea to delete item without using standard method. You can see one example why it is usually complicated. Maybe I have a workaround for you. You can try to use BADI ME_PROCESS_PO_CUST. There is a method CHECK where you get reference to PO header. You can easily get references to your items by calling method GET_ITEMS. So you will perform your check for each item and for wrong items you will call method INVALIDATE. This item will be marked as invalid and it will not be posted. Here I do not know how it will be displayed to user. Maybe the user will have to delete this item manually.
    Cheers

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    -Tulasi.

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