I'd like to get some feedback what you think is the best way of designing a VB 2005 application that can be set up ("scaled"?) to work with different database backends (say MS-Access vs. SQL Server vs. Oracle). For example, where would you store the connection info, where should the repository of SQL statements (which will vary slightly from DBMS to DBMS) reside, etc.
View 9 RepliesI am making a window based application in vb.net. Now i have work in two sql databases, so i when the window opens it will show two databases..when i select first db then i can work in that particular db only..if select 2nd db then i can work in second db only..how to do that?
View 1 RepliesIf I double click on an existing XSD file in a VB project to display the XSd file in Design mode, I get a menu and some instruction, but none of the menu buttons work and my XSD file is not displayed. Does this XSD design mode work properly in VS2010 B2? How do I display the contents of my XSd file?
View 4 RepliesFor some reasons that I don't understand all my design changes won't show up when I hit F5 and run the application. I can put how many new fields and labels with som "hello" text that I wont but they are not displayed at runtime. But all database changes the report i connected to will be displayed.
How can that be? What is wrong with my report when all datachanges runs thru but not my design changes?
I am using VS 2008 and the built in crystal report and viewer.
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I m working on an school management application, i design the database in access2003 and forms in vb.net2005. but i dont have any idea about the database conectivity. with the help of a book to connect with the db but i cannot save the data in the mdb file. in my application 1 add the followin buttons add new record modify record delete search using id or enrolment no.
View 1 RepliesI have to design form like
1. left side of form contains a TreeView
2. On selection of different tree nodes, i want to open different forms on right side of the screen
which control should i use. Splitter control is not useful, i cannot open forms in splitter control is there FRAMESET(Frameset tag in web debelopment) like control exist ? so that i can open forms in it?
design a form with multilingual on interface depend on the user!
View 6 RepliesI have program which is used to send emails. In this program I want to design a message body which contains, text, hyper links, images, draw boxes, etc. Rich Text Box object doesn't appeared to be the best object for this case. Can you suggest a good object to design "Body" part of a message?
View 3 RepliesI want to achieve the same thing as highlighted in attached file, so called seperator or page break, but i'm unable to find this control in VS 2005, how to get this control?
View 3 Repliesi need to design an application in visual basic 2005 that will retrieve pictures on a form. PS: All pictures should be located in a combo box! And the number of pictures are 2000.I've started with cmb.Items.Add("pic1") but that really tiresome to write 2000 codes.
View 9 RepliesIs there any keyboard combination out there that I could just press to show the Design of the form while viewing its code? I just find it a pain to right click then pressing the icon.
View 2 RepliesHow can I save the design page of the form? I can only save the code
View 1 RepliesNeed a procedure in SQL for translate a datatable in English to Arabic .I am having English table which is having category ID ,Code etc upto 25 columns in the SQL Database.We want to translate this table to arabic when user opts for Arabic .So need a procedure to convert this English table to Arabic.Do i want to use google translator for this case . Then how will it is linked with database .
View 1 RepliesWhen I attempt to open forms in the designer in the IDE, I get this error:
Exception of type System.ComponentModel.Design.ExceptionCollection was thrown.
My project is building OK. Any ideas?
is it possible to set a value of an item, for example: a textbox1.text = Empty.String at design time?
View 5 RepliesIn vb.net I am using password protected database with following connection stringconnetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:vaivaiDB.mdb;JetOLEDB:Database Password=secret;"Database access works fine on the development machine.
View 2 RepliesThe main purpose of the my app that I need your help with is, to deliver an always (or close to) up to date a list of files for the user to choose from for a variety of common purposes. For instance, opening the selected file in its native client editor application so the user can make changes. Another purposes would be to print the file, and I have others.
If nothing else (meaning recommendations for a better design that still keep my desired in mind) I'd like ideas on how to update my complex DataSet (background processing options, what's the most efficeient/quickest way to update my DataSet) as the list of files changes while my app is running and my app is designed to never close due to the long amount of time it take to load it initially.
The list must be always kept up to date while my app is running because not only the intial loading of data takes a lot of time but updates (new/modified/deleted) could potentially take too long depending on not only how much data to update/add (new files) but how efficeient my code is in updating the list. To be perfectly clear: If a new file is created then it need to be somehow (automatically preferably or manually i.e. button code) add to the list. If a file is deleted then it needs to bet removed from the list. And if the file has changed, perhaps some of it metadata or thumbnail image have changes so update the file's data in the list. All of which (new/modified/deleted) need to be as real-time as possble without degrading the server too much and without the user waiting more than a handful of seconds.
Listing all the files as quick as possible whether that be with or without metadata initially is very important because most of the time the user is going to filter (or scroll the list by typing) for a partial file name. Once the user filters/scrolls to the desired file there's a very good chance that he/she isn't even interested in the metadata, most of the time the user wants my app to open the selected file in its native client editor application so he/she can view or modify the file. The initial
load time of the data doesn't concern me as much as updates because the user can possibly do other things while it initially loads all the data as long as it not too long (more than a few minutes). From there the updates will either be automatic if possible (most desirable from a users standpoint) or the user initiated (e.g. button). Plus I'm thinking the updates might need to be done with a few different background processes (multiple threads) because I think I need one for periodic updates (e.g. every
15 minutes) and one background process for page updates meaning whatever the user has either scrolled to or filtered for, more accurately all files currently display to the user will be systematically update in the background so the user can still operate my app.
I'm currently using SqlDataAdapter.Fill to fill a DataSet object variable (which is bound [BindingSource] to a DataGridview control) to first populate the DataSet from the SQL query and then prorgammatically adds records (DataRow) for local files but please make recommendations. I don't mind big changes or starting over if necessary, I just want the best app possible based on the aforementioned criteria. I'm not sure if it complicates matters but I've also added custom columns in the DataSet for some special needs (thumbnail of files, booleans for tracking custom statuses). For the local files I'm currently populating the DataSet prorammatically (iterating a path/file string collect made by System.IO.Directory.GetFiles) since the list is first (and very quickly) populated with Vault files (which is always a far larger list than the local files) so . Again, I don't have to take this direction, make recommendations.
i try using both detail view and form view but they are not flexible enough to place my picture where i want it
View 1 RepliesI've been studying design patterns off-and-on now for a project I've recently been working on. I've been fortunate with this last one not to have to work with databases, but will soon have an opportunity.
View 8 RepliesI am developing an "AddressBook" like project in VB.NET. While developing database in SQL Server2005, i want to follow the principals of normalization and keep its degree of normalization as high as possible. Fields i am using are these.
Create table AddressBook_Contact
(
Contact_ID int Primary Key,FirstName varchar(15),MiddleName varchar(15),LastName
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I was hoping that I could get some guidance from some of you guys on Object Design with Database back ends. I am trying to build what could be considered to be my first full scale application, which is a student tracker (simplification). While I have a reasonable idea of how I would go about designing the classes for the system, the bit that I don't know how to do is, how I would go about getting the data to and from the database.
For example with my other applications, I have done a couple of things;
1) Gathered all the data when the application started up, creating the objects then. Then when the application closed sending the data back to the database.
2) Have the code which deals with getting the data in the specific class, so the student class for example would take only one constructor argument which would be the studentID, then the class code would connect to the database and populate the object fields as appropriate.
3) Variations of the above. I have also looked into LINQ, which seems like it would be very useful if you don't expect your classes to deal with any business logic and just data, but I suppose it would be possible to create a wrapper class that would include the business logic.
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I was hoping that I could get some guidance from some of you guys on Object Design with Database back ends.I am trying to build what could be considered to be my first full scale application, which is a student tracker (simplification). While I have a reasonable idea of how I would go about designing the classes for the system, the bit that I don't know how to do is, how I would go about getting the data to and from the database
View 3 RepliesI am designing a database using access 2010 and I ve been asked to design the user interface with Visual basic.I actually have designed tables and their relationship and did some queries according to the requirements. how do I create user interface in VB from this point knowing I don't have any form and report designed in access?
View 6 RepliesThere exists a database that holds information on each planet in the solar system. The database has multiple tables.The program intends to access this data to display it to the user in a variety of manners. The program does not intend to manipulate the data at its source, though calculations on two fields may be performed to determine certain display characteristics.What is the optimal method for accessing the data?My initial approach, (read: gut feeling, no research) was to take each related row of data from the database and create an object of a custom class based on the data. So you might wind up with:[code]Then use these objects to perform whatever actions the program needed to. I ran into a lot of problems trying to implement this, so that I believe my design approach is fundamentally flawed.
View 1 RepliesI am looping through a database with pdf locations. The application is button click event driven. The problem I am having is that I display a pdf. If the user clicks on the button then the pdf information is inserted into a database and the loop should be taking me to the next pdf. However, this loop does not seem to give what I need. What ends up happening is the first pdf gets displayed twice. I think mainly because I display the first pdf onload, but when I click the button it agrees and grabs the first item from the database. And it ends up falling behind because its restarting the query and I cant quite figure out how to get the button to catch the first displayed pdf, or skip it entirely since I am using a welcome pdf. So on the welcome pdf that is supposed to be displayed initially the user clicks agree and it agrees to the welcome pdf instead of just skipping it. I am not quite sure how to just move past the pdf.
public sub onload()
display the welcome pdf
end sub
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Now if I run the code without the loop it works fine. I just end up having to run the app however many pdfs I have in my database.
query data
display data
insert data
Windows.Forms.Application.Exit()
To display pdfs I imported the com control for adobe so pdfs get displayed like this:
axacropdf1.src = my.mysettings.default.readpath & pdflocation
pdflocation is passed from a query fill.
I think I have an underlying design issue which probably precedes the loop.
I am using visual studio 2008 professional edition, and i need some help in my assignment project.below are my screen interface and my database design view, relationship view, and coding and this is my coding Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
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:( I am have been trying to update changes from my vb.net program to an access database file and it simply will not work. I have am using table adapters. I'm not familiar with SQL so i can't go that route. It updates the dataset fine but not the database...
I have pasted my code below.
Private Sub BooksBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BooksBindingNavigatorSaveItem.Click
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I would like to creat database by access 2010 in design view i am using data type is Attachment. Then i want to connect this access with vb 2010 .. now how can effect attachment file Which code i can use?
View 7 RepliesShould I run a classic VB6 app thru the upgrade wizard in VS08 or should I re-design it from scratch. The database is a mess. Originally designed in ACCESS and imported to MS SQL SERVER. The main entities are e.g. ROLLER_SKATES and RENTALS. If you would like to rent a pair of roller skates you can. So this more or less comprises an Inventory system for the roller skates. Now you have 2 different skating rings. Skate-B1 and Skate-Z9, and you keep redundant and duplicate data from the previously mentioned entities in the skating ring tables as well.It's a nightmare.
At least the tables have row ID's. But no explicit foreign keys, just implicit columns identically named that "seem" to correspond to each other. But the rest of the table's attributes all default to NULL. Considering what C.J Date says about Types in his book SQL and the Relation Model, isn't it desirable to have CHECK CONSTRAINTS on attributes?
I am developing a new application for Students Training. how the database design should be? And could you provide a sample application similar to my requirement? Following is the requirement of the Application, The objectives of the program or application are:
Get Information about the total number of students trained in all company's department
Get Information about the total number of students who were either withdrew/ apologized /rejected
Anticipate of the future needs for student's work placement opportunities (numbers of students as well as the majors)
On light of the objectives mentioned above I consider the following data for the application preparation: Company's Department Needs Department Major Number of students for each major Supervisor Mobile Number
If it is possible when entering students details the program will automatically register him/her in the Department that has vacant place and already fit the requirements of the certain department-Internship Information.