Help need in Using oracle as backend with visual basic.
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Thread: Help need in Using oracle as backend with visual basic.

  1. #1
    Join Date
    Aug 2003
    Posts
    2

    Help need in Using oracle as backend with visual basic.

    Hi folks,

    I am currently developing a database application, in which visual basic 6 will be used as the front end and oracle as the back end?

    I have got some questions.

    Question 1)
    ===========
    .When trying to implement a db software solution involving visual basic with oracle, the only possible way is to use visual basic as the front end, with an oracle database rite? I.e an oracle database will be created and then all the coding and read write functions on the data will be performed thru vb code rite? Or are there other possiblities as well?Any elaboration?

    Question 2)
    ===========
    How can one create an oracle database, insert tables and values into the database?
    I used the database configuration assistant of oracle8i to create a database.It just asked for a global database name which i specified as dbt.dip and an sid which was dbt.It asked few more options which i specified.It didnt create any tables in the database nor any values.


    Also i experimented creating a table in oracle database through visual basic thru this code:

    Dim db As ADODB.Connection
    Dim rs As ADODB.Recordset

    'REFERENCE -MICROSOFT ACTIVEX DATA OBJECTS 2.1 LIBRARY

    Private Sub Form_Load()
    Set db = New ADODB.Connection
    db.Provider = "MSDAORA.1"
    db.Open "", "internalUSer", "internalpass"
    Set rs = New ADODB.Recordset
    rs.ActiveConnection = db

    rs.Open "CREATE TABLE adooracle(item_number NUMBER(3) PRIMARY KEY,depot_number NUMBER(3))"

    Is this method ok?

    How can one create tables apart from this vb based method?
    Also can some nice ppl here elaborate a bit on how to create an oracle database, how to create tables in it(if possible explain all methods), and how to insert data in it? i heard of commands like create tablename...where and in which program are these supposed to be give?Also is there some easy automatic method? any details on how to use it?



    Question3.)
    ==========
    Another question is, once i have an oracle database with tables created and some values in it, how can i access and perform operations on it through visual basic 6? Using the ado method?

    I tried this method:


    Dim db As ADODB.Connection
    Dim rs As ADODB.Recordset

    'REFERENCE -MICROSOFT ACTIVEX DATA OBJECTS 2.1 LIBRARY

    Private Sub Form_Load()
    Set db = New ADODB.Connection
    db.Provider = "MSDAORA.1"
    db.Open "", "internalUSer", "internalpass"
    Set rs = New ADODB.Recordset
    rs.ActiveConnection = db

    rs.Open "select * from tbl2"

    [before this, i first created the table tbl2 in visual basic using the following command only once
    rs.Open "CREATE TABLE tbl2(item_number NUMBER(3) PRIMARY KEY,depot_number NUMBER(3))" ]


    the table was created but when i tried to enter a new record by using:

    rs.addnew command, it popped up an error:

    "Current recordset doesnot support updating, this may be a limitation of the provider or of the selected locktype"

    I tried changing locking paramaters and keyset type to dynaset etc, but still same error.How can i remove this error and add new values using above method in the table?

    is this method ok? Any other methods for accessing and performiong operations on oracle dataabase through visual basic 6?

    Question4)
    ==========
    How and where does oracle store the database, the db files,where are all the table and values stored.Like when using an MS access database with visual basic, the entire database was just a .mdb file which consisted of tables, rows and cols and finally values.The access database could be created /modified from ms access or visual basic data manager.
    How are such tasks accomplised in an oracle database?

    Question5)
    ==========
    .How can an installer be created for an application which has been programmed using visual basic as front end and oracle as backend and how can the application be installed correctly with all files including the database and how can it be installed to be run on another pc?
    The idea is lets say, my application which uses vb as front end and oracle as back end has been programmed.Now i want to create an installer for it, so that my client can run it entirely on his pc,this is the application will be a stand alone on his pc.?how can this be done.What stuff needs to be transferred/cloned?

    Any help will be sincerely appreciated.Sorry for asking so many questions together, but please help me.Knowledge is power.And the best person is he who shares his knowledge with others.

    Waiting for replies

    Thanx alot in advance
    Last edited by creed; 08-07-2003 at 05:27 AM.
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  2. #2
    Join Date
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    Jim
    Oracle Certified Professional
    "Build your reputation by helping other people build theirs."

    "Sarcasm may be the lowest form of wit but its still funny"

    Click HERE to vist my website!
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