Back button- code

hi all , i created a custom page. on click of an url on seeded page i traverse the page to my custom page.
Now i need to place a button/link such that i must go to previous page.
How to do this using javascript in OAF. can any one send me the code for this.
i know that in destination URI we need to set this . But no idea of implementing this.
can any one send me this code...

rbojja,
the url param which you are talking about is to maintain in a session in CO file right.
No, i just gace u an option to utilise session, but as u are directing flow through personalization, u don't need this.What i am referring is different. i must pass this url through personalization to custom page as url param.
I didnt write any CO file.No custom code
>>>>>>
What Tapash and I m refrerring is that in the link in ur sedded page, which u have added through personilization i believe, add a url param say A and store the url of the seeded page in it. Now in ur custom page CO u can retrieve this url param A and use it in ur code logic.
I hope i m clear!
--Mukul

Similar Messages

How to get current view name on clicking device back button?

Hi,
iam wriing a function for handling device back button(in android) press in my app.controller.js .How to get current viewname when clicking device back button.
code samples will be helpful.
my app.controller.js looks like below
sap.ui.controller("com.opensap.App", {
onInit : function() {
document.addEventListener("deviceready", onDeviceReady, false);
onBeforeShow : function(evt) {
navButtonTap : function(evt) {
function onBackKeyDown(){
//alert("hai");
//sap.ui.getCore().byId("SalesDetail").app.backToPage("ProductList");
//sap.ui.getCore().byId("ProductList").app.backToPage("Dashboard");
//sap.ui.getCore().byId("SupplierDetail").app.backToPage("Dashboard");
function onDeviceReady(){
document.addEventListener("backbutton", onBackKeyDown, false);

I somehow managed to find the solution
function onBackKeyDown(){
var app = sap.ui.getCore().byId("LoginDetail").app;
app.back();

Using Back button causes Null Pointer exception

Hi,
I have done some customization by extending the seeded Controller on a Page.I have altered the View query and executed it again dynamically as its not a static query.
There is a functionality called compare which directs the users to a page from the page I have customised the controller.
If the user uses the back button to return to the previous page it is giving a Null Pointer exception.
Also refresh button causes a similar Null Pointer exception on the customised controller page.
can anybody throw some light?
Also is there a way to disable the back and refresh button on the page?

Is the control entering the back button code in process request in your CO? Have you confirmed this by putting some debug comments?It many be that this error might being from the code where you have handled back button.
Put debugging comments and check.
--Mukul

Query regurding the code of "back button"

Dear friends,
After runing my report ,back button is disabled to return selection screen
for removing this i added code this code after write statement
set pf-status '1000'.
leave to list-processing and return to screen 1000.
but it not working.so plz help
thaking u

Hi,
Are you using your own PF STATUS in the report.
Check the status of the report used.
In that Add the BACK function code in the functioncodes.
It will work.
leave to list-processing is used to come to list from the transaction? are you using Transaction screen display from selection screen 1000.
then if you wants to return from a screen, create a button on screen, assign a FCT code like BACK, then in the PAI write the logic using SY_UCOMM, if Sy-ucomm = 'BACK', leave to screen 1000'.
reward if sueful
regards,
ANJI

How to code the Back button

Hi everyone,
In my application on a perticular jsp page i had a back button.On clicking this back button one should go to the previous page.Can anyone suggest me how to code for this particular back button as all my efforts to code that button are in vain. I need this urgent.
Hope you will help me,

<input type="button" name="back" value="back" onclick="history.go(-1)">

How to retain the java applet generated code when back button is pressed!!

I've a jsp page in which i've wirtten the code which specifies the word which i write in the text box, then through the applet i'm showing the word which is written in the text box. It means my applet is running and it show the words which i've written in the text box. Now when i click on submit it goes to the next page and when i click on browser's back button then except the applet generated code everyone retains its values. Is there any way to find it out when it encounter the back button click then applet should be restarted. so in this way without writing the whole application form and in the applet generated code i can submit it again.
My question is how do i reatin the applet generated code when a click button is being pressed (b'coz for the textbox, textareas everything retains it)
any suggestions or guidance are most welcome.
thanks in advance....

you don't need to navigate explicitly. Just clear the back stack till your specific page and say goback. below is the code you can use.
protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
e.cancel=true;
RemoveBackStackTillSpecificPage("page2.xaml");
GoBack();
public static void RemoveBackStackTillSpecificPage(string pageName)
PhoneApplicationFrame frame = Application.Current.RootVisual as PhoneApplicationFrame;
var previousPage = frame.BackStack.FirstOrDefault();
if (previousPage != null && previousPage.Source != null)
while (!previousPage.Source.ToString().Contains(pageName))
frame.RemoveBackEntry();
previousPage = frame.BackStack.FirstOrDefault();
public static void GoBack()
PhoneApplicationFrame frame = Application.Current.RootVisual as PhoneApplicationFrame;
LastPageUri = frame.Source;
frame.GoBack();
Please mark this as answer if this answers your question
Purushothama V S

How do I use edge commons composition loader to load multiple compositions with a next and back button?

I am working on an interactive book and have set up each page as a separate composition in edge.
I am using the edge commons JS library to load multiple compositions into a main composition.
You can see how this works here: Edge Commons - Extension Library for Edge Animate and Edge Reflow | EdgeDocks.com
The way the edge commons tutorial is set up requires a button for each composition i want to load. I am interested in loading multiple compositions with a "next" and "back" button, and a "swipe left, "swipe right" gesture on the content symbol that each composition is loaded into. I also need the swipe features on the content symbol not to interfere with the interactive elements on the loaded composition.
Please suggest a solution that will work without adding additional scripts beyond edge commons and jquery.

Sort of. I'm using this code inside an action for a button symbol. But it doesn't work perfectly. Trying to debug it.
Let me know if you have any luck.
//Check to see if pageCounter already exists
if (typeof EC.pageCounter === 'undefined') {
// it doesn't exist so initialize it to first page
EC.pageCounter = 2;
//check if the page is only 1 digit -- patch for single digit
if (EC.pageCounter < 9) {
// it is, so we need to pad a 0 on the front.
EC.pageCounterString = "0" + EC.pageCounter;
//e.g. 01 ...09,11,12,13....115,222352,,....
else {
EC.pageCounterString = EC.pageCounter;
EC.loadComposition(EC.pageCounterString + "/publish/web/" + EC.pageCounterString + ".html", sym.$("container"));
EC.pageCounter = EC.pageCounter + 1;
//TODO for back -1

Wrong folder pressing back button

Hi gurus,
we are facing a problem with a custom button on the standard transaction IL03.
On the transaction we have created years ago a custom folder with a custom button that brings to another custom dynpro. When you access to this custom dynpro and press the back button you come back to the custom folder.
Now we have to add a new custom button on the custom folder using the same flow, but when we press the back button from the new custom dynpro we are not able to come back to the same custom folder, instead the system brings us back to the first standard folder of IL03, mantaining the title of the custom folder but inserting the standard fields of the first folder.
We used this code to call the program:
      SUBMIT xxxxxxxxxx WITH xxxxxxxxxxxx AND RETURN.
and in the xxxxxxxxxxx program we used this form
IF SY-UCOMM = 'BACK' OR
    SY-UCOMM = 'STOP'.
    SET SCREEN 0.
but it seems not to work properly.
Someone can help us?
Thank you!
Edited by: silfabb on Aug 1, 2011 11:50 AM

Hi silfabb,
replace the code section
IF SY-UCOMM = 'BACK' OR
SY-UCOMM = 'STOP'.
SET SCREEN 0.
with new code
CLEAR SY-UCOMM.
Regards
Clemens

Problems with Next and Back Buttons ActionScript 3.0

Hi,
I have set up a Back, Play and Next buttons in a slideshow I am making. The next and back buttons work correctly until it gets to the end.
If I press the Next button it goes back to what appears to be Frame 1 and will not go to the next slide. If I press the Back button it will then go to Frame 201 and If I press next again it will go to Frame 1. It will only go back and forth in between those frames.
If I press the Back button from the beginning it goes through the slide show correctly then it gets stuck at Frame 1. If I press next button it goes to Frame 121 and gets stuck in between 121 and 1.
I can't figure this out please help.
My code on Frame 1 is:
stop();
play_btn.addEventListener(MouseEvent.CLICK,playslideshow);
function playslideshow(event:MouseEvent) { gotoAndPlay(2); }
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_2);
function fl_ClickToGoToAndStopAtFrame_2(event:MouseEvent):void
gotoAndStop(40);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_8);
function fl_ClickToGoToAndStopAtFrame_8(event:MouseEvent):void
gotoAndStop(281);
My code on Frame 40 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_7);
function fl_ClickToGoToAndStopAtFrame_7(event:MouseEvent):void
gotoAndStop(121);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_9);
function fl_ClickToGoToAndStopAtFrame_9(event:MouseEvent):void
gotoAndStop(1);
My code on Frame 121 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_3);
function fl_ClickToGoToAndStopAtFrame_3(event:MouseEvent):void
gotoAndStop(201);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_10);
function fl_ClickToGoToAndStopAtFrame_10(event:MouseEvent):void
gotoAndStop(40);
My code on Frame 201 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_4);
function fl_ClickToGoToAndStopAtFrame_4(event:MouseEvent):void
gotoAndStop(281);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_11);
function fl_ClickToGoToAndStopAtFrame_11(event:MouseEvent):void
gotoAndStop(121);
My code on Frame 281 is:
forward_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_5);
function fl_ClickToGoToAndStopAtFrame_5(event:MouseEvent):void
gotoAndStop(1);
back_btn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndStopAtFrame_12);
function fl_ClickToGoToAndStopAtFrame_12(event:MouseEvent):void
gotoAndStop(201);

I found the solution! Flash CS5 Tutorial 6 Click On Button Go To Another Frame.avi - YouTube
I had to Convert to Keyframes each frames I wanted to jump to on the buttons layer. Then highlight the button and give each another instance name! Like forward1_btn, forward2_btn, back1_btn, back2_btn... I did that and adjusted the action-script for each button.
Frame 1
stop();
play_btn.addEventListener(MouseEvent.CLICK,playslideshow);
function playslideshow(event:MouseEvent)
gotoAndPlay(2);
forward1_btn.addEventListener(MouseEvent.CLICK, Shoot_1);
function Shoot_1(event:MouseEvent):void
gotoAndStop(40);
back1_btn.addEventListener(MouseEvent.CLICK, Back_1);
function Back_1(event:MouseEvent):void
gotoAndStop(281);
Frame 40
forward2_btn.addEventListener(MouseEvent.CLICK, Shoot_2);
function Shoot_2(event:MouseEvent):void
gotoAndStop(121);
back5_btn.addEventListener(MouseEvent.CLICK, Back_5);
function Back_5(event:MouseEvent):void
gotoAndStop(1);
And so on...

Re: [iPlanet-JATO] Back Button functionality

Hi Mike,
Our test environment does not include proxy server.
regards,
syam.
Please respond to [email protected]
cc:
Subject: Re: [iPlanet-JATO] Back Button functionality
Guys,
Please clarify something for me, the JATO code is commented as follows
protected void addResponseHeaders(RequestContext requestContext)
// These values should make any proxy between the client and
// server avoid caching, and ensure that pages from one user
// can never be seen by another user (if they're cached anyway)
requestContext.getResponse().addHeader("Pragma","no-cache");
requestContext.getResponse().addHeader
("Cache-Control","private");Yet you make no mention of whether your test environment includes a Proxy
Server, or does your browser
go directly to the Application Server's web server?
Can you clarify, please?
----- Original Message -----
From: <syam_reddy@p...>
Sent: Wednesday, April 25, 2001 2:59 PM
Subject: [iPlanet-JATO] Back Button functionality
>
Hi,
We observed the following difference in behaviour between JATO pages
and NetD served pages.
We have the following scenario. User will login to the
site. After login he will get a frame set. This frame set has threeframes.
Top and bottom frames are used for navigation (to switch between various
sections on the site.) .The middle frame(main frame) shows the actual
content. When the the frame set gets loaded main frame shows page1. User
will click on a link on page1. Page 2 will be loaded in main frame. Atthis
point if the user clicks on back button , with migrated application(JATO
pages) the following message appears in the main frame.
In Netscape Communicator 4.61 the following message appears in the main
frame :
Data Missing
This document resulted from a POST operation and has expired fromcache.If
you wish you can repost the form data to recreate the document by
presenting the reload button.
In IE 4.72/5.5 the following message appears in the main frame:
Warning : Page has Expired
The page you requested was created using information you submitted in a
form.This page is no longer available.As a security precaution, Internet
Explorer does not automatically resubmit your information for you. To
resubmit your information and view the web page click teh refresh button.
However, in the NetD site page1 will appear in main frame.
How do we mimic the NetD behaviour with the migrated
applications ?
We think the above behaviour with migrated Apps, is due to the
headers that are get set in Application ServletBase , see the following
code snippet :
protected void addResponseHeaders(RequestContext requestContext)
// These values should make any proxy between the client and
// server avoid caching, and ensure that pages from one user
// can never be seen by another user (if they're cached anyway)
requestContext.getResponse().addHeader("Pragma","no-cache");
requestContext.getResponse().addHeader
("Cache-Control","private");
If we comment the above code , we were able to mimic theNetD
behaviour. Are there any alternatives/thoughts on how to mimic the NetD
behaviour ?
Thanks in Advance,
syam&ravi.
[email protected]
[email protected]

OK, here's what I'm trying to do: We have, like you said, a menu
page. The pages that it goes to and the number of links are all
variable and read from the database. In NetD we were able to create
URLs in the form
pgXYZ?SPIDERSESSION=abcd
so this is what I'm trying to replicate here. So the URL that works
is
pgContactUs?GXHC_GX_jst=fc7b7e61662d6164&GXHC_gx_session_id_=cc9c6dfa5
601afa7
which I interpreted to be the equivalent of the old Netd way. Our
javascript also loads other frames of the page in the same manner.
And I believe the URL-rewritten frame sources of a frameset look like
this too.
This all worked except for the timeout problem. In theory we could
rewrite all URLs to go to a handler, but that would be...
inconvenient.

How to get the values retained on clicking the back button in jsp page

Hi All,
I had two jsp's search and results. In the search page when i enter some values in the text fields, the rsults will be displayed for that search criteria. I had a back button in the results page. When i click on this back button i will get back to my search page. I am using the following code for this back button.
<INPUT TYPE="button" VALUE='Back' onClick="javascript:history.go(-1)" class="button">
Now the problem is when i get back to search page using this back button, i am not able to get the values in the search page which i entered, i am getting all blank values. What should i change to get these values back in the search page. Should i maintain any sessions for this?

You have no control at all over the back button process. To the server, it's indistinguishable from the user simply tying the URL of your search page. So, you need to store this data server side*.
When your search page is submitted and processed, store the values you received for each of the fields into the user's session. Then, when the search page is generated, check the session for these values, and for any values that are not null, put their values into the html as the default values for the textboxes and controls you are using. This lets you handle the whole matter on the server's side.
*barring convoluted, unportable, black-magic javascript trickery which you should definitely avoid

Problem displaying drill down STANDARD ALV for a particular record after pressing back button

I have a simple interactive ALV grid report. NOT 'OO'. It display correctly on initial execution. AT the moment, 6 records. I want it to work such that if i click record '1', a drill-down version of that ALV with only that one record clicked is displayed. This currently occurs correctly. The problem arises when i click the back button and want to click on a new record, say in the 2nd row..this new 2nd row record is not displayed. The first one is displayed again. I tried clearing and fiddling around but then the last record is displayed. I have used the 'ID' field as a 'hotspot' getting picked up by sy-tabindex. Maybe it could be that i shouldn't loop and use a work area e.g in my select statement. i'm not so sure i've looked around, and tried a few things. I can't get it right yet. My code is below:
*& Report ZALV
REPORT ZALV.
TABLES: ZCONTACT.
TYPE-POOLS: slis. "slis contains all of the ALV data types.
TYPES: BEGIN OF ty_zcontact.
         INCLUDE STRUCTURE zcontact.
TYPES: icon TYPE char4, "field holding traffic light value- adding a column to internal table to hold the traffic light
         END OF ty_zcontact.
DATA: "fieldcatALOG TYPE slis_t_fieldcat_alv WITH HEADER LINE,
       it_zcontact TYPE TABLE OF ty_zcontact,"declares an internal table of type ZCONTACT
       wa_zcontact TYPE ty_zcontact,
       gd_layout TYPE slis_layout_alv,
       gd_repid LIKE sy-repid,
       g_variant TYPE disvariant,
       gx_variant TYPE disvariant,
       g_save TYPE c VALUE 'X',
       it_fieldcat TYPE slis_t_fieldcat_alv,"declares field catalog table of line type alv
       wa_fieldcat TYPE slis_fieldcat_alv, "declares the work area of the field catalog
       it_list_top_of_page TYPE slis_t_listheader.
DATA: it_fieldcat1 TYPE slis_t_fieldcat_alv,
       wa_fieldcat1 TYPE slis_fieldcat_alv.
DATA: V_FIELD(30) TYPE C,
V_VALUE(10) TYPE C.
       "izontact TYPE TABLE OF zcontact.
        "i_logo TYPE OT.
       "ls_layout TYPE slis_layout_alv.
**Selection Screen details
*SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME.
*PARAMETERS: variant like disvariant-variant.
*SELECTION-SCREEN END OF BLOCK B1.
SELECT-OPTIONS:
age FOR wa_zcontact-age,
lastnme FOR wa_zcontact-lastname.
**Getting default variant
* AT SELECTION-SCREEN ON age.
*    SELECT SINGLE age FROM zcontact INTO wa_zcontact-age WHERE age = age.
* IF sy-subrc NE 0.
*    MESSAGE:'That age does not exist mate, Please enter another age' TYPE 'E'.
*    ENDIF.
INITIALIZATION.
*gx_variant-report = sy-repid.
*CALL FUNCTION 'REUSE_ALV_VARIANT_DEFAULT_GET'
*EXPORTING
* I_SAVE = G_SAVE
* CHANGING
*    CS_VARIANT = GX_VARIANT
* EXCEPTIONS
*    NOT_FOUND = 2.
*IF SY-SUBRC = 0.
* VARIANT = GX_VARIANT-VARIANT.
* ENDIF.
START-OF-SELECTION.
PERFORM DATA_RETRIEVAL.
PERFORM BUILD_FIELDCATALOG.
PERFORM DISPLAY_ALV_REPORT.
PERFORM top_of_page.
"g_repid = sy-repid.
*Fetch data from the database
FORM DATA_RETRIEVAL.
SELECT * FROM zcontact INTO TABLE it_zcontact WHERE age IN age AND lastname IN lastnme.
"assigning traffic light colour to each row based on a condition
* IF wa_zcontact-age GE 65.
*   wa_zcontact-icon = 1. "Red Traffic Light
*   ELSEIF wa_zcontact-age BETWEEN 40 AND 64.
*     wa_zcontact-icon = 2. "Yellow traffic light
*     ELSE.
*       wa_zcontact-icon = 3." Green traffic light
*       ENDIF.
*       MODIFY it_zcontact FROM wa_zcontact TRANSPORTING icon.
*       CLEAR wa_zcontact.
ENDFORM.
FORM BUILD_FIELDCATALOG.
*Build field catalog
wa_fieldcat-fieldname = 'ID'.
"wa_fieldcat-seltext_m = 'The Contact ID'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'LASTNAME'.
"wa_fieldcat-seltext_m = 'Contact Lastname'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'FIRSTNAME'.
"wa_fieldcat-seltext_m = 'Contact Firstname'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'DOB'.
"wa_fieldcat-seltext_m = 'Date Of Birth'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'TEL'.
"wa_fieldcat-seltext_m = 'Telephone Number'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'ADDRESS'.
"wa_fieldcat-seltext_m = 'The Address'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'OCCUPATION'.
"wa_fieldcat-seltext_m = 'The Occupation'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'WEIGHT'.
"wa_fieldcat-seltext_m = 'WEIGHT'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'AGE'.
"wa_fieldcat-seltext_m = 'AGE OF THE CONTACT'.
wa_fieldcat-do_sum   = 'X'.        "Display column total
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'SALARY'.
"wa_fieldcat-seltext_m = 'SALARY'.
wa_fieldcat-do_sum   = 'X'.
APPEND wa_fieldcat TO it_fieldcat.
gd_layout-lights_fieldname = 'ICON'.
ENDFORM.
FORM DISPLAY_ALV_REPORT.
gd_repid = sy-repid.
*Pass data and field catalog to ALV function module to display ALV list
   CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
     EXPORTING
       it_fieldcat            = it_fieldcat
       i_callback_program     = gd_repid
       i_callback_top_of_page = 'TOP_OF_PAGE'
       i_callback_user_command = 'USER_COMMAND'
       i_structure_name       = 'ZCONTACT'
       i_save                 = 'X'
       is_variant             = g_variant
       is_layout     = gd_layout
TABLES
       t_outtab      = it_zcontact
EXCEPTIONS
       program_error = 1
       OTHERS        = 2.
ENDFORM.
FORM top_of_page.
*ALV Header declarations
   DATA: it_listheader TYPE slis_t_listheader,
         wa_listheader TYPE slis_listheader,
         t_line like wa_listheader-info,
         ld_lines TYPE I,
         ld_linesc(10) TYPE C.
wa_listheader-typ = 'H'.
wa_listheader-info = 'Contact Details'.
APPEND wa_listheader TO it_listheader.
CLEAR wa_listheader.
wa_listheader-typ = 'S'.
wa_listheader-info = sy-repid.
wa_listheader-key = 'Program Name:'.
APPEND wa_listheader TO it_listheader.
CLEAR wa_listheader.
wa_listheader-typ = 'S'.
wa_listheader-info = sy-uname.
wa_listheader-key = 'User Name:'.
APPEND wa_listheader TO it_listheader.
CLEAR wa_listheader.
wa_listheader-typ = 'S'.
wa_listheader-key = 'Run Date :'.
CONCATENATE sy-datum+6(2)
             sy-datum+4(2)
             sy-datum(4)
             INTO wa_listheader-info
             SEPARATED BY '/'.
APPEND wa_listheader TO it_listheader.
CLEAR wa_listheader.
wa_listheader-typ = 'S'.
wa_listheader-key = 'Time :'.
CONCATENATE sy-uzeit(2)
             sy-uzeit+2(2)
             sy-uzeit+4(2)
             INTO wa_listheader-info
             SEPARATED BY ':'.
APPEND wa_listheader TO it_listheader.
CLEAR wa_listheader.
   CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
     EXPORTING
       it_list_commentary = it_listheader
       i_logo = 'KLOGO'.
ENDFORM. "top_of_page
*& Form sub_user_command
FORM USER_COMMAND USING P_UCOMM TYPE SY-UCOMM
P_SELTAB TYPE SLIS_SELFIELD.
CASE P_UCOMM.
   WHEN '&IC1'.
CASE p_seltab-fieldname.
   WHEN 'ID'.
   READ TABLE it_zcontact INTO wa_zcontact INDEX p_seltab-tabindex.
   PERFORM DATA_RETRIEVAL1.
   PERFORM BUILD_FIELDCATALOG1.
   PERFORM SECOND_GRID.
   ENDCASE.
   ENDCASE.
ENDFORM. "
FORM DATA_RETRIEVAL1.
SELECT * FROM zcontact INTO TABLE it_zcontact WHERE id EQ wa_zcontact-id.
ENDFORM.
FORM BUILD_FIELDCATALOG1.
*Build field catalog
CLEAR: wa_fieldcat, it_fieldcat.
wa_fieldcat-fieldname = 'ID'.
"wa_fieldcat-seltext_m = 'The Contact ID'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'LASTNAME'.
"wa_fieldcat-seltext_m = 'Contact Lastname'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'FIRSTNAME'.
"wa_fieldcat-seltext_m = 'Contact Firstname'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
ENDFORM.
FORM SECOND_GRID.
   CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
     I_CALLBACK_PROGRAM = SY-REPID
     IT_FIELDCAT = IT_FIELDCAT
     i_structure_name       = 'ZCONTACT'
     i_callback_user_command = 'USER_COMMAND'
     TABLES
       T_OUTTAB = IT_ZCONTACT.
   ENDFORM.

Hi Ten Mariga,
                 I wonder why the second select Query is needed at all instead you can use
---> Not Needed
FORM DATA_RETRIEVAL1.
SELECT * FROM zcontact INTO TABLE it_zcontact WHERE id EQ wa_zcontact-id.
ENDFORM.
----> Instead you can do
   READ TABLE it_zcontact INTO wa_zcontact INDEX p_seltab-tabindex.
Append wa_zcontact to Second_table.
And you can use the Second_table to display the second ALV. The second Select Query will affect the performance too.
Cheers,
Krishnakumar B.

How to put a back button

hi all
i'm using jdev 10g 10.1.3. i'm tring to put a back button in my pages that when i click on it will go back to the page from which it came but am getting lost how to go about it.
I created a backing bean with the following code for the Action property:
import javax.faces.context.FacesContext;
public class BackButtonBean {
private String url;
public BackButtonBean() {
public void setUrl(String url) {
this.url = url;
public String getUrl() {
return url;
public String backButton_action() {
FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get(url);
return url;
Can someone help me out what to do next?
thanks
preeti

Hi,
if you use JSF then you can navigate back by setting the previous ViewId to the UIViewRoot you access from FacesContext.getViewRoot(). So all you really need to do is to track the ViewId of the previous page
Frank

Session state and browser cache - Back button problem

Hi all,
I have a problem (and unless I'm missing something I think we all do) with session state and use of the browser's Back button. I really hope I'm just being dumb...
Background scenario:
Page P has a sidebar list allowing the user to select what content is displayed (e.g. 'stuff relating to X, Y or Z' where X, Y and Z are rows in, say, a table of projects). When a list entry is clicked, we branch to page P with the value of the list item placed in an application-level item (call it G_PROJECT). Reports on page P use G_PROJECT in their WHERE clauses.
So, click list entry X and G_PROJECT is set to X and page P shows reports for project X.
Page P also has a set of buttons which branch to various edit pages which allow attributes of page P's current project to be updated. These pages similarly use G_PROJECT in their WHERE clauses.
Problem scenario:
1. The user goes to page P and picks project X off the list. Project X's stuff is displayed (G_PROJECT = X).
2. The user then picks project Y off the list. Project Y's stuff is displayed (G_PROJECT = Y).
3. The user then clicks the browser's Back button. The page is served from browser cache, so project X's stuff is displayed, but G_PROJECT still = Y.
4. The user clicks an 'Edit' button; we submit, and branch to an edit page which displays (and will edit) data for project Y because G_PROJECT still = Y.
This is SERIOUSLY BAD NEWS - apart from being confusing, the user's edit permissions on projects X and Y may differ, and so the user may be able to perform 'illegal' updates.
I've read what I can on this forum and the rest of the web looking for ways to a) inhibit browsers' 'Back' functions and/or b) prevent pages being cached by the browser, but none of them have worked for me.
Short of waiting for browser manufacturers to recognise that the web is now full of applications as well as static pages, and enable robust programmatic control of cache behaviour, does anybody know how the problem can be avoided - or at least detected?
Thanks,
jd
Failed attempts to date:
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="cache-control" content="no-store">
<meta http-equiv="cache-control" content="private">
<meta http-equiv="cache-control" content="max-age=0, must-revalidate">
<meta http-equiv="expires" content="Wed, 09 Aug 2000 01:01:01 GMT">
<meta http-equiv="pragma" content="no-cache">
Disallowing duplicate submission (page attribute).
window.history.go(1);

Thanks Scott,
I may be being dumb here but I don't see how that would help...
P250_PROJECT and G_PROJECT are currently kept in sync by app logic. Whichever is used to drive, if the page is rendered from cache then the app logic is not executed, so the rendered page contents are not those keyed by P250_PROJECT, as illustrated in steps 1-4 of the problem above.
The user sees X, the session items say Y. The engine doesn't know what the user is seeing.
when page P is POSTed, its hidden item P250_PROJECT should always be used to derive the application item G_PROJECT. Then whether the page was pulled from cache or rendered anew via a click from the sidebar link, the project ID is determined by the contents of that page.
As I said above I tried this, with the 'Edit' branch set to:
Set these items: G_PROJECT
With these values: &P250_PROJECT.
but it makes no difference. The project ID is not determined by the rendered page contents - the engine gets the value of P250_PROJECT from session state.
I can code the 'Edit' pages such that they check permissions and if necessary redirect back to p250 (conditional before-header branch), but that's a clunky cure rather than the prevention I was hoping for.
Please tell me if my understanding is incorrect.
jd

How to clear parameters defined in selection screen on back button

Hi,
I have a report with parameters, few being input fields, and check boxes. After report is executed when user selects the back button, the selection screen is displayed again but with the old selection values. I want to clear them.
So in the Initialization even I added the code to clear all these parameters;
CLEAR: p_aaa, p_bbb, p_ccc.
I debugged and control passes through this code but still the fields are not cleared and they retain the old input values.
How to clear them ?
thnks

>
Rob Burbank wrote:
> Yes he did. My mistake.
>
> But isn't this what he wants? To clear the Selection screen so that something has to be entered?
>
> Rob
IMO, he only wants to clear the selection screen parameters on the click of 'BACK' button
in the list screen. If the OP clears the selection screen variables in AT SELECTION-SCREEN OUTPUT
even, the values assinged to the selection parameters in the INITIALIZATION and with the DEFAULT addition of the PARAMETERS and SELECTION-OPTIONS statements will also be overwritten even when the report is executed for the
first time.
-Rajesh.

Back button- code

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