ajax - how to download excel with n number of sheet inserting when click button using application process in oracle apex

Question

how to download excel with n number of sheet inserting when click button using application process in oracle apex..please help me..

i am created the page when click button excel file will be downloaded with data.. now i am need to add additional number of sheet in same excel. i want to show all in one excel with different sheet of different data.

I am using the procedure

    Create or replace PROCEDURE emp_Csv(o_Clobdata OUT CLOB) IS 
  l_Blob         BLOB; 
  l_Clob         CLOB; 
  
BEGIN 
 
  Dbms_Lob.Createtemporary(Lob_Loc => l_Clob, 
                           Cache   => TRUE, 
                           Dur     => Dbms_Lob.Call); 
  SELECT Clob_Val 
    INTO l_Clob 
    FROM (SELECT Xmlcast(Xmlagg(Xmlelement(e, 
                                           Col_Value || Chr(13) || 
                                           Chr(10))) AS CLOB) AS Clob_Val, 
                 COUNT(*) AS Number_Of_Rows 
            FROM (SELECT 'empno, ename, sal, mgrno, hiredate, deptno' AS Col_Value 
                    FROM Dual 
                  UNION ALL 
                  SELECT empno||',' ||ename||','|| sal||','|| mgrno||','|| hiredate||','|| deptno AS Col_Value 
                    FROM (SELECT empno, ename, sal, mgrno, hiredate, deptno from emp))); 
 
  o_Clobdata := l_Clob; 
EXCEPTION 
  WHEN OTHERS THEN 
    NULL; 
END;

and i am using the application process is

DECLARE
    L_BLOB           BLOB;
    L_CLOB           CLOB;
    L_DEST_OFFSET    INTEGER := 1;
    L_SRC_OFFSET     INTEGER := 1;
    L_LANG_CONTEXT   INTEGER := DBMS_LOB.DEFAULT_LANG_CTX;
    L_WARNING        INTEGER;
    L_LENGTH         INTEGER;
BEGIN

    -- create new temporary BLOB
    DBMS_LOB.CREATETEMPORARY(L_BLOB, FALSE);
    
    --get CLOB
    emp_csv( L_CLOB);
    
    -- tranform the input CLOB into a BLOB of the desired charset
    DBMS_LOB.CONVERTTOBLOB( DEST_LOB     => L_BLOB,
                            SRC_CLOB     => L_CLOB,
                            AMOUNT       => DBMS_LOB.LOBMAXSIZE,
                            DEST_OFFSET  => L_DEST_OFFSET,
                            SRC_OFFSET   => L_SRC_OFFSET,
                            BLOB_CSID    => NLS_CHARSET_ID('WE8MSWIN1252'),
                            LANG_CONTEXT => L_LANG_CONTEXT,
                            WARNING      => L_WARNING
                          );

    -- determine length for header
    L_LENGTH := DBMS_LOB.GETLENGTH(L_BLOB);  

    -- first clear the header
    HTP.FLUSH;
    HTP.INIT;

    -- create response header
    OWA_UTIL.MIME_HEADER( 'text/csv', FALSE);

    HTP.P('Content-length: ' || L_LENGTH);
    HTP.P('Content-Disposition: attachment; filename="emp_data.csv"');
    HTP.P('Set-Cookie: fileDownload=true; path=/');

    OWA_UTIL.HTTP_HEADER_CLOSE;

    -- download the BLOB
    WPG_DOCLOAD.DOWNLOAD_FILE( L_BLOB );

    -- stop APEX
   -- APEX_APPLICATION.STOP_APEX_ENGINE;
  EXCEPTION
    WHEN OTHERS THEN
      DBMS_LOB.FREETEMPORARY(L_BLOB);
      RAISE;
END;

question from:https://stackoverflow.com/questions/65937003/how-to-download-excel-with-n-number-of-sheet-inserting-when-click-button-using-a

Answer 1

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