I`m a beginning programmer, and I`m trying to build my first 100% object. The object would be a USER object, representing rekords from users table in database. The table in the database has 5 columns ->
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When we can access the public methods via object then why is there need of inheritance.
View 2 RepliesI am trying to search a database to find a record. Here is my code.
Private Sub mnuFind_Click()
Dim strQuote As String
Dim strCriteria As String
Dim strText As String
txtWidth.Enabled = False
txtLength.Enabled = False
[Code] .....
The problem that I am having is when I run the code it returns nothing. I have even put in bad data and I don't even get a message Data not found.
use the following code to create a database in ms access
Code:
'reference: Microsoft ActiveX Data Objects 2.8 Library
'reference: Microsoft ADO Ext. 2.8 for DDL and Security
[code].....
I am creating a very simple Voting System, that will be use on electing new set of officer in a teacher cooperative...
So I have to create two separate program, a Server Program that will manage all the information in the election and a Client Program where voters will vote their selected candidate...
The election officers wanted that the Server Program will display the Voting Results at real time... So when the Voter finished voting, The Voting Result displayed by the Server Program will also be updated every time the Client Program Insert the data to Database....
An action listener in Server Program that will execute if new data is inserted in a Table in the Database made by the Client Program...
I'm trying to delete a record from an access database using the command object in vb.net 2010 express but can't seem to get anywhere.If I run the code below, I get no errors but nothing happens. The connection opens fine but the db does not update.the table has only two columns.The variable strCrit is so that I can build the sql string with exclamation marks, When I debug.print the sqlupdate string it seems to read fine.the routine is called from a form with a button.
Dim sqlupdate As String
Dim strcrit As String
strcrit = """"[code].......
I have a program that someone else designed the form on and sent to me to populate the code. I am not sure what could have been done to cause this problem, hoping for a quick oversight on my part. There are several fields of textboxes that the user enters numbers in. Normal behavior for textboxes is when you tab to them the current contents are highlighted. On one of these textbox fields, and only that one set of textboxes, the contents are highlighted like normal at first, but after the user edits the content of the textbox, if you tab to it again it will go directly into edit mode instead of highlighting the contents. Each textbox in the field does this individually, so if you just edit one, all the rest will continue to highlight contents until you edit them as well. It appears you don't actually have to change the value of the textbox, just entering edit mode and getting a blinking cursor is enough. I cannot find a difference in the properties of these textboxes compared to the rest.
View 4 RepliesI created a windows form to create, modify or delete a record in using VB 2008 using SQL 2008 as backend.Below is the code which I use to create a new record
Private Sub AddBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AddBtn.Click
flag = 0
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Say I have a list and I have an object. I want to find the index of that object in the list.
View 1 RepliesI'm trying to import data from an exel sheet to a data grid but I keep on getting the following error "The Microsoft Jet database engine could not find the object"
Here is my code
Imports System
Imports System.Data
Imports System.Data.OleDb
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I have two tables Products and Categories with a many to many relationship. I am trying to copy the categories linked to one product (OriginalProduct) to another product (newProduct). The problem is when I execute the SaveChanges() method, I not only get the records in my linking table, but it also creates another copy of the categories in the categories table. I've tried this in many ways but here are the last couple that I've attempted:
' Copy Product/Categories
For Each oneProdCategory In OriginalProduct.Categories
Dim relatedCategory = _productContext.GetObjectByKey(New EntityKey ("ProductInfoEntities.Categories", "RecordId", oneProdCategory.RecordId))
[code]....
i'm trying to set up my program to insert a new record to my database i keep getting a insert syntax error
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
[Code].....
I wonder, is there any difference between these two line of code in perfomance (suppose we have class called Car)?
Dim c = New Car
Dim c As New Car
I'm trying to import data from an exel sheet to a data grid but I keep on getting the following error "The Microsoft Jet database engine could not find the object"
Here is my code
Imports System
Imports System.Data
Imports System.Data.OleDb
Public Class ExellFrm
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How to update a record database table from unbound datagridview using vb.net
View 7 RepliesI am trying to check a record in database before inerting a new record here is my code but problem is when i enter a names first alphabet it imediatly populate massage. i want to check it after entering whole name
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Try
Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &
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In a reply to one of my posts, a user said I should create an event for Textbox1.TripleClick.So, I would need to create an event.My problem is, how do I create an event for a textbox so that the event shows up in the textbox events?
View 10 RepliesI'm creating a database program for my final graduate at college. But I was stuck when I opened my solution, my visual studio it always crash and crash and crash..
My project it's using SQL Compact Database, 8 Project (6 Visual Basic, 2 Visual C++), using .NET Framework 3.5.A project in VB is 6 Windows Forms (Single App and MDI App), Class Library and C++ just Library.
What must I do now? Where can I fix my project? At least I can build the relase or installer of my project..
It's wrong to include all of project in one solution?
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I am using the office interop to open word documents and saving as html to do parsing work.After a few executions I notice that in the task manager under processes there are still instances of WINWORD.EXE running. I have used the following to close the object but it is still there:
wordApp.Quit()
wordApp = Nothing
how can you create find & find next (using tooltip menu) create in vb.net for datagridview value.
View 1 Replies[code]...Find last rows each machine_id in mysql database with program?
View 1 Repliesi have an external form, and it has a label, which his name is: Static62 how do i read the label into my vb.net program?
View 10 RepliesI am converting C# to VB right now
in VB, I have these codes :
Dim ind As Foo.Index
Dim ed As Foo.Edit
ind = New Foo.Index
[Code]....
Seems I do need to show all the codes. But I need to talk directly to you as well (or You just install the software of mine).
What I am looking to do is write a VB.NET program, as a service that reports anything on client1 that I want (say the fact it is online) to a database on the internet, so I can look on management1 and see the online status of the machine (assuming management1 has a connection to the online database).
What is being reported doesn't matter, what I am looking at is a starting point to create a system like that. I have googled obviously and come up with nothing, I'd just like a "starting point" or some documentation to look at for creating something like this. The service doesn't look too difficult but the periodic reporting of online status or ANYTHING to any kind of database is not something I am sure how to deal with.
I already have setup a VBS that reports information to an ASP script that then places it in a database but I don't know how I would create say a "keep alive" connection for a vb.net service.
I'm trying to add a new record to my database, below is the code i have but it doesnt seem to be working. I dont even get the message box saying new record added.
''BEGIN DATABASE CONNECTION
con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = W:Textvertisingdatabase.mdb"
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Having problem in updating an existing record. An error occurs "Data Type Mismatch in Criteria Expression"
Private Sub ToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton1.Click
Dim myBuilder As OleDb.OleDbCommandBuilder = New OleDb.OleDbCommandBuilder(dataAdapter)
[code].....
i have a search function in my program in order to find records from an access database... all the other functions add/edit/delete are working just fine this is my code for search function: [code]
View 16 Replies[code]There's my code to add, was working, not sure if I accidently changed something but it doesn't work now
View 3 RepliesI have a couple of NET 2.0 projects on the go, but in one of them, I can't access the "Server" object to get at its HtmlEncode property. i.e Server.HtmlEncode("xxx") does not work.
I get the following error displayed in Visual Studio design time error log: "Local variable 'server' cannot be referred to before it is declared."
I have tried to add a manual reference to System.Web, but although the dll file is present, it doesn't add itself on - or at least it doesn't display on the "Add Reference" dialog as being added. BUT here is what's interesting - I can access other intrinsic objects such as "Request", "Response"...etc. All except "Server"!
I need a program which shows day and time difference between 2 dates.For example: The user chooses 2011/12/11 10:20:05 and 2010/12/11/ 10:40:35.Then the program shows the difference between them in days ,hours ,minutes and seconds.
View 22 Replies