AX 2012 Table all fields and Label in lookup field

I have a requirement to pull all the field of Inventtable and store in table to show in Lookup field.First of all we will create a table (TableFieldLookupTmp) that will store all the fields detail of InventTable ?

Lookup Code:
public void lookup()
{
    SysTableLookup                SysTableLookup;
    TableFieldLookupTmp    TableFieldLookupTmp;
    QueryBuildDataSource       queryBuildDataSource;
    QueryBuildRange               queryBuildRange;
    Query query                     = new Query();
    tableName                        tableName = 'Inventtable';
    int                                    tmpTableid = tablename2id(tableName),i;
    DictField                           dictField;
    DictTable dictTable            = new DictTable(tableName2id(tableName));

    if(!(select TableFieldLookupTmp where TableFieldLookupTmp.TablenumId == tmpTableid).recid)
    {
        ttsBegin;
        if (dictTable)
        {
            for (i=1; i<=dictTable.fieldCnt(); i++)
            {
                dictField = new DictField(dictTable.id(), dictTable.fieldCnt2Id(i));

                if(subStr(dictField.name(),0,4) == "DEL_")
                    continue;
                else
                {
                    TableFieldLookupTmp.Label = dictField.label();
                    TableFieldLookupTmp.field = dictField.name();
                    TableFieldLookupTmp.TableNumId = tmpTableid;
                    TableFieldLookupTmp.fieldid = dictField.id();
                    TableFieldLookupTmp.Types = dictField.baseType();
                    TableFieldLookupTmp.insert();
                }
            }
        }
        else
        {
            error(strFmt("Table '%1' not found!", tableName));
        }
        ttsCommit;
    }
    sysTableLookup = SysTableLookup::newParameters(tableNum(TableFieldLookupTmp), this);
    sysTableLookup.addLookupField(fieldNum(TableFieldLookupTmp, label));
    sysTableLookup.addLookupField(fieldNum(TableFieldLookupTmp, field),true);

    queryBuildDataSource = query.addDataSource(tableNum(TableFieldLookupTmp));
    queryBuildDataSource.addSortField(fieldNum(TableFieldLookupTmp, field), SortOrder::Ascending);
    queryBuildRange = queryBuildDataSource.addRange(fieldNum(TableFieldLookupTmp, TablenumId));
    queryBuildRange.value(int2str(tmpTableid));
    sysTableLookup.parmQuery(query);

    sysTableLookup.performFormLookup();
}