DropdownByKey inside ALV Table - Problem with Value set

Question

Hi,
I have Component A which has a custom controller that uses the interface controller of the ALV Component.
Custom controller has node ITAB.. that has certain attributes...
I want DropdownByKey inside the ALV Table column. I am populating the corresponding attribute of ITAB node with the value set that I want the drop down to have.
However when I execute the application..I get error
" Key XXX not present in Value Set and is not initial"
XXX is present in the Value Set table of the attribute.
<b>Following is my code in the methods of CUSTOM CONTROLLER</b>
<u>Generate Value Set</u>
nodeinfo_context = wd_context->get_node_info( ).
nodeinfo_ITAB= nodeinfo_context->get_child_node( wd_this->wdctx_ITAB ).
<u> Populate the Value Set</u>
data ls_valueset type wdy_key_value.
data it_valueset type wdy_key_value_table.
ls_valueset-key = 'FRA'.
ls_valueset-value = 'FRANCE'.
Append ls_valueset to it_valueset.
ls_valueset-key = 'SFO'.
ls_valueset-value = 'SAN FRANCISCO'.
Append ls_valueset to it_valueset.
<u>Set the Value Set for the Attribute</u>
call method nodeinfo_ITAB->SET_ATTRIBUTE_VALUE_SET
              EXPORTING
                 NAME = <b>'ATTR1'</b>
                 VALUE_SET = it_valueset.
<u>Changing ALV Column</u>
Get the ALV Configuration Model
  ifc_alv2 = wd_this->wd_cpifc_alv2( ).
  itab_alv2_config = ifc_alv2->get_model( ).
  itab_alv2_config->IF_SALV_WD_TABLE_SETTINGS~SET_READ_ONLY( abap_false ).
<u>Get the Column reference for ATTR1</u> 
ref_alv2_colset = itab_alv2_config->if_salv_wd_column_settings~get_column( <b>'ATTR1'</b> ).
<u>Create the DropDownByKey Object</u>
CREATE OBJECT ref_dropdownkey
          exporting SELECTED_KEY_FIELDNAME = ref_alv2_colset->id.
  ref_dropdownkey->SET_SELECTED_KEY_FIELDNAME( <b>ref_alv2_colset->id</b> ).
  ref_alv2_colset->SET_CELL_EDITOR( <b>ref_dropdownkey</b> ).
<u>Check the value set</u>
  ref_attr_info = nodeinfo_flight_details2->get_attribute( ref_alv2_colset->id ).
I do get back the value set if I see ref_attr_info->value_set.
SO the Value Set is getting set for attribute ATTR1, but still I get Error
<b>"The value selectedKey = "SFO" in DropDownByKey "_8C" does not exist in the value list and is not initial either "</b><u></u>
SAP  User

Answer 1

You have forgotten to set a cell variant. I had the same with setting a ProgressIndicator cell-editor to a table column as default editor. This causes the column to be hidden on the table while it did show up in the settings dialog. I removed the set_editor( lr_progressindicator) and created a cell variant instead with this lr_progressindicator. You then need to add this cell variant to your column. By default it will select the standard viewtext-cell-editor (which can only be textview and inputfield, like when you create a table yourself in a view), but if you use a cell variant, it will display the required cell editor if you set it (last line of the code).
<b>In your case, replace lr_progressindicator by your ref_dropdownkey.</b>
  DATA: lr_column_settings    TYPE REF TO if_salv_wd_column_settings,
        lr_column             TYPE REF TO cl_salv_wd_column,
        lr_column_header      TYPE REF TO cl_salv_wd_column_header,
        lr_cellvar            TYPE REF TO cl_salv_wd_cv_standard,
        l_cellvar             TYPE string,
        lr_progress_indicator TYPE REF TO cl_salv_wd_uie_progr_indicator.
  lr_column_settings ?= wd_this->mr_table.
  lr_column = lr_column_settings->get_column( 'STATUSBAR' ).
  lr_column_header = lr_column->get_header( ).
  lr_column_header->set_text( 'Completed' ).
CREATE OBJECT lr_cellvar.
  l_cellvar = 'CV_SB'.
  lr_cellvar->set_key( l_cellvar ).
  CREATE OBJECT lr_progress_indicator.
  lr_progress_indicator->set_percent_value_fieldname( 'STATUSBAR' ).
  lr_progress_indicator->set_tooltip( 'completed' ).
  lr_cellvar->set_editor( lr_progress_indicator ).
  lr_column->add_cell_variant( lr_cellvar ).
  lr_column->set_selected_cell_variant( l_cellvar ).
I hope this will solve your issues.