Best Connection Code For Retrieving / Updating And Deleting Data From Database

Mar 15, 2012

I start my project in vb.net backend is sql server i have completed my design now i start my coding but i am confused for connectivity code whether i used dataset or datable which is good? please give me best connection code for retriving,updating and deleting data from database..

View 1 Replies


ADVERTISEMENT

Inserting,updating,deleting Data From And To Excel Files Using Oled Or Odbc Connection?

Apr 11, 2009

I have tried everything.but im not able to insert updat and delete the excel file..im able to connect the excel sheet.the connection also seems to be opened...here s my connection string:

Dim sConnectionString As String
Const kunal = "C:"
sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & _

[code].....

View 4 Replies

VS 2005 Retrieving Data From A Database Connection?

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.

View 2 Replies

Updating Progressbar When Retrieving Records From Database?

Jun 12, 2011

I want to use a progressbar to show that I'm retrieving the records from the database so that the user wont be confuse if the program is still running or not. Here's my code.

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
cs = "Initial Catalog = KRADB; Data Source = .; User id = lab; Password = 'clrscr2010'"
sqlcon = New SqlConnection(cs)
sqlcon.Open()

[code]....

View 4 Replies

Double Execution : Deleting And Updating On Table On Database?

Nov 5, 2010

im having a problem on double execution, this is a part of audit trail on my system, the DELETE FUNCTION is working, but it aint updating, im getting an error - it says that "Syntax Error on update statement" on i tried to manually query it on my access and it is working, i bold the statements that affectes the UPDATE function

Dim burahin As String
burahin = MsgBox("Are you sure you want to delete a customer from the database", vbOKCancel + vbQuestion, "Administrator")
If burahin = vbOK Then

[code]....

View 5 Replies

Get SQL Commands (adding, Updating, Deleting) To Work With A VB 2010 Database?

Feb 12, 2012

My project involves making a table database that displays student number, surname, first name, homeroom, and grade avg. Through SQL commands, there must be functions to add, update, delete, search by field, and save records to the database.I have already set the database up just fine and displayed it in a DataGridView. Through the DataGridView, I was able to go to the "Add Query" area, and I successfully made the queries necessary for searching by field. However, when I try to do anything other than a search using the query builder (ie start my SQL command with INSERT INTO or DELETE FROM), I ultimately get the message "Failed to get schema for this query"For example, this SQL code (to add an entry to the database) worked when I was in the Query Builder (and the entry that it made is still in the database), but when I finally tried to confirm it, I got the "Failed to get schema for this query" message.Being unable to add entries to the database this way, I tried to do it with textboxes on a form. Each textbox will have one of the fields, and at the click of a button, they would be put into the table. My code is below. I do not know what is wrong withit. When I run it, my fields do not appear on the DataGridView immediately, but I must run the program again to see it. The time after, the entry is gone. So I am not sure how exactly such entries are to be saved.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try

[code].....

View 1 Replies

VS 2008 Manipulate In Retrieving,inserting And Updating Record On Just Only How Call On The Database?

Nov 10, 2011

i need some function like adodb.recordset on vb6.0 on vb.net but seem i cant manipulate it like recordset because i want to manipulate in retrieving,inserting and updating my record on just only how call on the database im using mysql database..

View 4 Replies

Forms :: Refresh Data In A Listview After Adding/deleting Or Updating A Record?

Jun 16, 2012

I have designed a form which contains a listview(to see the list records) and textboxes (used for adding or updating).an already save record into table using this

cmd.Connection = con
cmd.CommandText = "INSERT INTO student_info_tbl VALUES('" & txtUserId.Text & "','" & txtFirstName.Text & "','" & txtMiddleName.Text & "','" & txtLastName.Text _

[code].....

View 5 Replies

Updating Child Collection Of POCO (adding/updating/deleting) In Entity Framework 4.1?

Jan 25, 2012

I have a webpage with a form that is used to edit some object. This object contains a Collection of other objects defined like this: Public Overridable Property Employees As List(Of Employee)

On a form I can delete an employee, add a new one or modify existing one. When I click save new values are sent to the server. On a server I check if the user exists. If exists then I modify its values, if it does not exist then I add it. All employees that exist on the server and were not sent are marked as deleted (State changed to EntityState.Deleted). I try to use the following code (dbCollection = database entities, newCollection = collection sent from the form):

[Code]...

This code does not work, because changing to EntityState.Deleted removes the object from collection, and for each loop breaks, since the collection is modified...I know that I can overcome this problem by using a for loop or adding objects to delete to some other list first, but I hope maybe there is a pattern that would make my code nicer.

View 1 Replies

Retrieving A PIN Code From A Database?

Mar 11, 2009

I am coding a banking and ATM application, which is split into two parts. In one part the employees of the bank can open new accounts for customers, edit accounts, etc. It includes assigning a unique PIN code for the customer. This is all saving to a database. The customer then uses the ATM part of the application to withdraw money. They use a unique PIN code to access their account. The problem that I'm having is retrieving the PIN from the database. I want to write a simple If statement, to match the PIN entered with the corresponding PIN in the database, so that it will retrieve all the relevant customer's details, eg. bank balance. The PIN is successfully saving to the database through the following....

Private Sub btnCommit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCommit.Click
If inc <> -1 Then

[Code]....

So how do I retrieve the PIN from the database that matches with the PIN entered and hence, retrieves bank balance, etc?

View 1 Replies

Sql - Updating Datatable To EXISTING Global Database Connection?

Jan 13, 2011

I am using Microsoft Visual Basic 2010 Express. I have a WPF-based project. I have a successful connection to a database in Database Explorer, and a working existing Data Source in Data Sources.

I created a datatable from the datasource using this code:

Dim roster_table As New DataTable("AGENT_ROSTER")

I can manipulate this datatable just fine, but I cannot figure out how to save its data to my database (agentroster.sdf) since the connection is on a global level, and isn't declared in this particular window.

How do I update this database from the datatable on this window?By the way, I tried creating a connection on this window's code, using the exact same connection string as the successful globally-connected database, yet it said that it couldn't connect.

View 1 Replies

Retrieving The Correct PIN Code From A Database?

Mar 18, 2009

I am having difficulty retrieving the correct PIN code from my database, for an ATM banking application. When someone enters a correct PIN code that is already in the database, they gain access to their ATM account. If incorrect, then a message box appears. I am having an unusual problem where, the system is partially working. The code I have, is preventing the user from accessing their account, in the correct manner, eg. message box pops up. However, it is also not accepting the correct PIN code. The most unusual thing about this, is that, if the user enters the number "1", the message box won't pop up, however it will still block the user from accessing their account. And even stranger again, after entering the number "1", trying it, then erasing it, if they enter the correct PIN after this, it will allow them to access their account.

Here is the code:

Public Class ATM2
Dim Pin As Integer
Public Sub Retrieve()

[Code].....

View 5 Replies

Save Data In Microsoft Access Database And Retrieving It Back From Database?

Nov 19, 2010

can anyone teach me how to save data in microsoft access database and retrieving it back from database?[code]so, how do i save it in that and how do i load their data by typing their ic no only..

View 5 Replies

VS 2008 Updating And Deleting In A Access Database With VB 2008?

Jul 28, 2009

I have spent several hours trying to delete a row and insert a row into an Access database using the OLEDBDataadapter and dataSets without any success. I don't get any errors it just doesn't update the datatable. Here is the last version of the code I have been trying to get to work. I have done a lot of searching and have

Data save
Private Sub SaveNumDte(ByVal ltoNum As String, ByVal ltoDate As Date)
Dim numTotal, x, MaxRows As Integer

[code].....

View 4 Replies

Retrieving Data From Database?

Oct 17, 2010

I am using two textboxes, one for roll number and the other for the corresponding roll number.

And I am using 4 command Buttons

Move First
Move Previous
Move Next

[Code].....

View 2 Replies

Retrieving Data From Access Database?

Jun 11, 2011

i am working on a module in vb 10..i have to retrive data from the database between two dates...i have used the following code but not able to get ny output,,nt even an error

Imports System.Data.OleDb
Public Class Form4
Dim con As OleDbConnection

[Code].....

View 14 Replies

Retrieving Data From Database Into Labels?

Nov 30, 2009

I am creating an ordering form. I have created an access database and linked it to VB2008. I am struggling to retrieve records from this database into labels. I am using a combo box to select records from the access db table, but I cant display them.Both my source and target tables have 6 columns and I want to display all columns after selecting record from the combo box.

View 6 Replies

Searching And Retrieving Data From Database

Mar 24, 2012

my project name is book bank management system i need to give my author's name,book name and number of book's needed in my front end according to tht i want to know whether my book is available or not if available means return the number of books in the database
i am using sql server 2005 as back end and visual studio 2008 as front end

View 2 Replies

.net 2010 And Access Database Not Retrieving Data?

May 19, 2010

I am trying to build a front end for an access database I created I can connect to the database but when I try to pull data into a data grid view I get no results Here is the code what did I do wrong(I'm also new to vb)

search
Private Sub searchbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles searchbtn.Click
Dim srval As String
Dim type As String

[code]....

View 8 Replies

Database - Retrieving Data From ListView Control

Apr 12, 2010

I have a ListView setup in details mode that looks like this: When the user presses the delete button, I need to go ahead and delete their record from the database. This I can do fine, but I'm stuck on how I retrieve the data that is highlighted in the ListView control. I've tried using Google but all the examples I found have failed to work.

View 1 Replies

Database :: Retrieving Data From ListView Control?

Apr 15, 2010

I have a ListView control set up in details mode with 5 columns. It is populated by code using the following subroutine:

For j = 0 To 14
cmd = New OleDbCommand("SELECT TeacherName, ClassSubject, BookingDate, BookingPeriod FROM " & SchemaTable.Rows(i)!TABLE_NAME.ToString() & " WHERE (((BookingDate)=" & Chr(34) &

[code]....

View 2 Replies

Deleting Data From Database Using Sql, Access 07 And VB 2010

Dec 6, 2011

Dim Conx As String
Dim DBx As String
Conx = "Provider=Microsoft.ACE.OLEDB.12.0; "

[Code]....

View 3 Replies

Update Database Without Deleting Current Data?

Feb 17, 2011

I have created a service that will update a table. <foxpro to mysql>Before the update it will delete all the data in a table<mysql> and then insert the record from the dataset<from foxpro> one by one.I have more than 5000 records and it is very time consuming, now I would like to ask for some idea if there is a way in vb.net to only insert the data that have been recently added to the table<in foxpro> to mysql table. Is it possible in vb.net to know what has been added in the table?

View 3 Replies

Code For Updating A Access Database?

Apr 21, 2012

i am trying to update the info in my access database and i keep getting a syntax error. This is my first database program and i found a site online that showed my how to do it but when i get to the update it keeps giving me the syntax error.

Private Sub CreateBT_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CreateBT.Click
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String

[code]....

View 1 Replies

ODBC Command String For Deleting The 50% Of Data Rows From Access Database

Jun 15, 2010

I have an Access table in which I connect through ODBC commands. I want to delete the 50% of data rows from it. Can anyone knows a string to write for doing that? ALARMLOG is my table. In MS SQL I tryed succesfully the following command :

[Code]...

View 10 Replies

C# Database Connection Code?

Oct 11, 2011

with the meaning of this snippet?

string conString =@"Provider=Microsoft.JET.OLEDB.4.0;" + @"data source=c:illing.mdb"; OleDbConnection conn = new OleDbConnection(conString); Conn.Open(); DataSet ds = new DataSet(); OleDbDataAdapter adapter =

[code].....

View 2 Replies

Code For Database Connection?

Apr 16, 2010

provide VB.net connection code to connect with sql server for adding,deleting and updating data.I'm new to .Net.I need to learn .VB.Please provide the code for this.Those who know the code please provide here.

View 2 Replies

Updating And Deleting An Image?

Mar 7, 2012

i have doing a project using vb.net which a function like insert,update and delete data from database including image. i have successfully insert the image what i did for that is i copy the image to a location named image in current directory of the system and save the path into the database according to the user id.now the problem is, when user need to update the details the image won't update i have an error and when user wants to delete the details, the details in the database deleted but the image not.

Codes:
insert data
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

[code]......

View 6 Replies

Data Not Updating To Database

Aug 16, 2011

I've seen similar problems posted on this and other boards, typically with a bunch of code checking before its realised that that database itself is being copied to another directory and run from there. Apparently this is managed via the database properties, copy to output directory settings. In my case I have tried all three options, with no change in result. After "saving", inspection of the actual database via the server explorer shows no changes have actually been committed.

I am getting to a point where I need to start entering large amounts of data into the app and have at actually save to the db for deeper testing.

I noticed this behavious first when using an .accdb and it has persisted through my exploration of SQL(.mdf)

db Output Option Selected / Result

always copy... data changes do not persist between debug runs and is not entered into actual database

copy if newer... data changes do persist between debug runs but is not entered into actual database (checked via server explorer)

Do Not Copy... generates the below Error on execution

System.Data.SqlClient.SqlException was unhandled
Message=An attempt to attach an auto-named database for file C:UsersXXXDesktopVisual Basic ProjectsSQLtestWindowsApplication4 - CopyWindowsApplication4inDebugMyDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

View 3 Replies

Updating A Database / Data Set?

Feb 3, 2012

Basically I want to be able to save any data I enter into my data grid / dataset ermanently , so when i close the program or restart it the data I previously entered within the grid will be present.This is what I have so far

BindingContext(CustomersDs, "Customers").EndCurrentEdit()
OleDbDataAdapter1.Update(CustomersDs) is called Shop.mdb )

[code].....

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved