Accessing Data Without Using Database (.Net 2005)
Jan 31, 2010
Is it possible to add, edit, view and delete records using a file only (instead of a database) and .Net 2005 (VB.Net/C#)? The concept is that a file that'll work more-or-less like a database. One can add, edit, view, delete and query data to and from the file. The file, either cannot be opened directly or data inside the file should be in some encrypted form so that even if the file is opened no one can comprehend it. Data inside the file can only be manipulated by a front end application i.e. .Net 2005.
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Dec 12, 2010
I'm having some issues with a game I've been writing for several years. It's an on/off project and recently I purchased a new computer and formatted my old computer so all of my installations of windows and visual basic 2005 (express edition) are fresh. I'm getting the following error:
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Jul 14, 2009
I have an issue with am access database source located on a remote computer.I tried using ADODB to access it, it works, but when I change( update insert or delete) the database on the remote computer, the changes is not reflected in my application
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Oct 11, 2009
I have a small databse program. Form1 uses the Private Sub OpenToolstripmenu to Openfiledialog box and creates a connection and adapters. I need a second form that will access the same connections and adpaters what is the best /correct way to do this? Also other sub functions on form1
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Feb 15, 2011
My problem is that i have a usb-to-serial device which creates a virtual serial port ( Com 4 for example )on the computer i need to connect to it and get the data stored on it I already have worked out how to use the System.io.ports to connect to the port ( baud rate, stop bits, parity ,ect) and it connects to the usb fine. But once the connection is open i don't know how to retrieve the data. Everything i have tried relies on events. But as the usb does not send data i don't know how to access the serials memory.
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Oct 21, 2009
I have to make some automatization on a web server, I use Visual Studio 2005 Visual Basic Windows Console Application. I want to make a load/performance test of the web server, so I open several Internet Explorer instances, and I login the application, that is not a problem. But after that I have a mess on the page and I cannot make any more automatization...The composition of the page after the login is like this: I have the default form, another form and a multiple data window(mdw) controller, which dinamically can switches the forms on this part.
The problem is that I don't know how to access the controls of this mdw forms. I couldn't find much about this mdw controller and I am not an expert.
My code is here:
Imports System
Imports System.Diagnostics
Imports System.Web.Ui.Webcontrols
[Code].....
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Apr 9, 2010
I have a problem with accessing a data file from Access database. Data Source configuration Wizard comes back with a dialoge box saying "Error Message: Could not load type 'Microsoft Visual Studio.DataDesign.SynDesigner.SyncFacade.SyncManger' from assembly
'MicrosoftVisualStudio.DataDesign.SynDesigner.DslPackage,version = 9.0.0.0, Culture = netural,PublicKeyToken=b03f5f7f11d50a3a
My computer is a Vista and it have known to have lots of problem, but not sure if this is one of it.
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Aug 15, 2011
how to connect different vb applications to a database server.like accessing data from one database by different applications...
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Jan 14, 2011
I have code on log in form but it only get the latest data on username and password column on my database
Here is my code
Public Class Users
Dim MyLogIn As New myRecords
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[CODE]...
This is my connection:
Imports MySql.Data
Imports MySql.Data.MySqlClient
Module myconnect
[CODE]...
This is my record:
Imports System
Imports System.Data
Imports MySql.Data
Imports MySql.Data.MySqlClient
[CODE]...
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Mar 10, 2010
'm just a beginner who want to learn on manipulating SQL Server data using vb.net. I have already experienced manipulating data in ms access. So I just recycled the code that I used in here. But unfortunately I got this error:Object reference not set to an instance of an object.And another problem is that, I'm not really sure if what I have inputted in the SqlConnection matches what is in SQL Server. Here is a screen shot of sql server management studio express:
Imorts system.data.sqlclient
'declarations
Dim idnum As String
[code].....
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Aug 15, 2009
In a windows form i want to fetch data for the combobox1,combobox2,combobox3 and combobox4 from the BankAccount table and fetch data for combobox5 from the TransferMoney table and fill the dropdown list of these combobox's at the form load event.
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
[code].....
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Feb 26, 2009
This is written in.NET 1.1 and connected to a SQL 2000 Server Database
[code...]
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Mar 9, 2010
What i would like to do is change the color of a column in excel. I cannot seem to get the right command string to accomplish it.
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Nov 17, 2011
I have am using an XBee ZigBee wireless module to communicate with a project of mine. I currently have it set up to the point where I can open a hyperterminal session to COM 4 (which is the usb com port), and recieve the data that is being sent via the microcontroller on the other side of the wireless link.
I would like to make an app that takes the data and puts it in to a more user-readable format. (Via VB 2005) So far all I have come up with is some problems. It doesn't seem like I can use the built in serial port tool to access a "virtual" com port. From the following link:Quote:
Note You cannot use the Microsoft .NET Framework classes to directly access other types of ports, such as parallel ports or USB ports.[URL]..Do I have to use a "COM port redirector" to make it seem like a real COM port? Or is there some easy way that I am not thinking of?
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Sep 2, 2009
currently im stuck at the part where user enter data through form and form pass it to database.but it is just not working.there is a patient database with id,nric,name ,dob,address,telephone, dateofregister fields.Can anyone help me to point out where i did mistake in this coding?
Imports System.Data Imports System.Data.SqlClient
Public Class Addpatient
Dim da As New SqlDataAdapter
[code].....
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Jul 14, 2009
in my form..there's a couple of textboxes..these textboxes display data from the database using databinding method..
when i click on my delete button to delete the data displayed in those textboxes...the data will be gone from the textboxes...but when i check my database..the data is still there....what happen??..how do i delete the data from the textboxes..AS WELL AS from the database?
here's my delete button code
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Dim intresult As Integer
[Code].....
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Nov 3, 2007
ms sql and been learning by browsing through many online tutorials and guides to complete a system.currently im stuck at the part where user enter data through form and form pass it to database.but it is just not working.there is a patient database with id,nric,name ,dob,address,telephone, dateofregister fields
Imports System.Data Imports System.Data.SqlClient
Public Class Addpatient
Dim da As New SqlDataAdapter
[code]....
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Jan 19, 2010
I did a code to insert a data into a mdb database but I want the data to be saved in the database in an encrypted manner.
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Aug 21, 2011
currently i am create windows application form for staff registration for my assignment, this form is contain textbox which are connected to database.Every time i run this form ,i can see data in the textbox ,which is from column in my table database.My question is how i can make the textbox is blank every time i run my staff registration form.I dont want that data which i save in database is been seen because this form is use to add new data in database.i am using visual studio 2005 and sql 2005.Here i attach some picture when i run my form application, there is data in every textbox.
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Mar 19, 2009
i have a textbox that i want to format the value and i placed it in the Validated event.. it works ok when a user enters a value but when data is being loaded from database, it doesn't format.
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Sep 11, 2009
I have this form: Attachment 73106 In this form,I want to fetch data from the database(access). Initially when the form loads,the balance field remains disabled. But when i select a data from the dropdownlist of the account number then i want the corresponding data of the balance field from the database is shown in the balance filed of the form and the textbox becomes enabled since it is containing the data. I did this at the form load event:
[Code]....
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Apr 12, 2010
I have a database (Seeds1) that is connected to my project. I have gone in manually and entered data in to my database which is an Access. How do I retrieve information from my database into my program.
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Oct 3, 2009
I have created a access database and have sucsessfully connected to it.I have three records in it (just for testing) and have got the BindingNavigator to connect to it as well.I can move through the (3) records that I have previously entered, and when I click on the Add Record button it zero's the text fields that I have displayed.When I enter NEW DATA it does not SAVE it.
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Jul 19, 2009
The form is like this:A database contains six columns:"From Bank","From Account","From Balance","To Bank","To Account","To Balance"On transfer button click,The balanced will be transfered and added to the "To Balance" of "To Account"i did the code for form load but i cant get throught the transfer money
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
[code].....
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Mar 22, 2010
i write a program using vb 2005. This program collects data from Flight Simulator 2004 (altitude, speed, etc). These data should be uploaded periodically (every 10 secs) to a database which is installed to my website. The problem is that my hosting provider doesn't allow remote access to the database. Is there any way to put that data into the database?
ps. The strange with all the above is that i run a shareware program that can upload data collected from the flight to my database by simply adding the database name, user ir and password.
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Oct 15, 2010
I have 10 threads each using the same sub to do work. This sub is calling a function to save the results. How are the threads accessing the sub? Is each one getting a fresh copy of the sub to do its thing or are they using the same piece of code and need to wait for each other to finish processing? I don't get any hits when searching for such a specific scenario. I am wondering because it is about using sockets (usually lightweight stuff) to retrieve a resource and the cpu is working at 100% all the time. Still it is very fast, 900 internet queries finish in about 3 minutes.
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Apr 21, 2010
I am trying to programatically use my SQLdatasource in my code behind so that I can select a certain field from a table based on the selectedindexchange event of a listbox control on my form. I have one datasource already set to the listbox control but i want a seperate datasource to select a field based on the value of the listbox. I declared a new datasource sqlDataSource2, set the connectionstring to the same database/table and i have the following line set for the select statement
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Nov 10, 2008
I have been doing some research into accessing devices on a USB port and it's kind of helped, but not really. From what I understand, I can use the IO.Port namespace to access a device on a USB port (usually). Let me know if this is incorrect.
First, I made a simple program that looped through the ports available. I get COM1 and COM3, but I have 4 USB ports. Where are the others?
My
Dim comm As New List(Of IO.Ports.SerialPort) 'list of comm ports
For Each PNstr As String In IO.Ports.SerialPort.GetPortNames() 'get a list of Com Port Names
[Code].....
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May 7, 2012
How can you add data in a window form to a sql database in visual studio 2005?[code]...
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Jul 9, 2010
column name = CustomerName
SQL server database name = SQLDEV6.
I have been given a task to create a application in vb that is supose to load data from a table named tblCustomers from a DataBase.
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