I think my problem in my code is the savefiledialog1. I tried running the code without it and it works. There's no error.
I also remove the if condition in the .ShowDialog and it worked. But when I press the cancel button, the code still runs.
vb
Private Sub butBackup_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBackup.Click
With SaveFileDialog1
[Code].....
Now I am trying to go backward and convert the mdb file to a txt or csv. Is it possible to simply reverse the code so to speak and use it that way? below is the code that I am using to convert from txt to csv. I reverse the code to produce the next result but am getting error message; "Syntax error in INSERT INTO statement".
[Code]...
I have written a piece of code for my backup. It looks something like this:
Dim con As SqlConnection
Dim cmd As SqlCommand
con = New SqlConnection("Data
[code].....
the right direction for creating a setup of my application in which i had used Sql Server 7.0 as a database
View 3 RepliesI would like to manually access and update an Access Database without using bound user interface objects
For example:
1) Open the Database (eg: AJAXMAIN.ACCDB)
2) Create a Dataset of one of the tables in the database (eg: Contacts)
3) Loop through all records in that table and edit one of the fields
4) Update the table while completing the edit of each record.
While the code for doing this in VB6 is eazy peazy the code for doing it in VB2008 escapes.
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 RepliesWrite code or use tableadaptors, bindingsources, dataset, etc.? I have experience with the older ways i.e. connection strings, ado code, sql, etc. but was hoping the newer tools in vs would make the user interface easier and more flexible. So far i have been disappointed. Am I wrong and I am missing something? Am I alone in this opinion or ? What is your past experience in VB and have you found vb.net to be a step forward in db user interface design? if your answer is yes then what is the easiest way to put a table record count into a text box? should i bypass all the new stuff/objects ( adaptors, binding sources, navigators, designers, etc) and just write code or what?
View 3 RepliesI have a text file data to insert into a database for report
ITEM01,Toy
ITEM02,Card
Let me briefly list down the steps i took to achieve my result.
1) Insert data into Database using text file
2) Display the records from the NEW Database(Item2) using DataGridView
3) Using datagridview, i use to checkboxes to determine the selectedRow
4) Once the selectedRow are selected. I press on Delete Button
Delete Button - Update the Item2 Table field 'Deleted' to 1 - Delete the ItemID by using datagridview selectedrow cell value Which means in 1 loop, i process two database transaction.. Is there something wrong? How do i shorten the process to just delete the item without querying two database.
i have a form and i want to have my form to have a button thatwhen i click the button a backup of database will firedo you have any solution or idea for this
View 7 Replies[code]So both methods seem to step through fine but don't commit the changes back to the database. This function is my only 'edit' function. It needs to look for the datarow which is to be edited. Edit it and then save the changes to the database.My other two functions create datarows and work fine. This one I just can't work out. I have a dataset with two datatables. This is running as a web service. Database is MSSQL.
View 1 RepliesI am strugling to get a value back from an access database, what i am using is,
Public Shared Function ReturnTimes(ByVal DateValue As Date) As DataTable
Dim cmd As OleDbCommand = New OleDbCommand()
With cmd
.Connection = Database.conn
[Code]...
How can i take back up on Every minute and hourly and complete whole day backup using VB.NET i.e i want to know the coding example
View 5 RepliesI have an mdf file in the vb.net 3.5 project I am working on. I wanted to write an stored procedure that will create a back up of the db in a selected location. How can I take a back up of the database from my application? I want the user to take a back up of the database manually.
View 4 Repliesexperts is it possible to roll back insert or update operation in ms access database..
View 1 RepliesI have an xbap application that connects to a webservice to run different stored procedure. The webmethod loads the data into a data table and returns it to my xbap application. My program gives the user the option to manipulate the data. What is the best option for saving the data back to the database?
View 6 RepliesI loaded a dataset (just one table) from the database. Then I modified f.e. the rows from 5 to the end and add 4 new rows. Now, I would like to write back the dataset into the database.
View 2 RepliesI am having a problem with an application that displays data in datagridview depending on a selection from a combo box.The problem occurs when I want to write the data back to the database.
I get the following error:"Update unable to find TableMapping['Product'] or DataTable 'Product'."
Is this because the table in the dataset is filled in a private sub? If so how do I make it public?
Any ideas what is wrong. Code is as follows:
[Code]...
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.
[Code]....
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 using MS Access 2003 and vb.net to develop a windows application of inventory management.
I have used datagridview in the form and using FillBytoolstrip option, can filter data using type.
But i have no idea as to how can i update the database to reflect the latest changes in the gridview.
following is the code I have used.
Private Sub BOM_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.PartnoTableAdapter.Fill(Me.HemDatabase1DataSet3.partno)
End Sub
[Code].....
I am using VB.net 2003. I am working on a stand alone windows program that stores data in an Access database via ADO.net via MS jet 4.0 OLEDb. I have progressed to the point that I would now like to provide the end user the oportunity to back-up the data they have stored and re-install if they choose. I am envisioning a menu item for "maintenance" with sub-items for "back-up" and "restore"
View 1 RepliesI just need to edit one field on a datarow and save the changes back to the database. My database is SQL Compact 3.5
I tried many methods but change is not saved to database.
Me.taSet.Fill(Me.Dsset.tblQuestions)
Dsset.tblQuestions.Rows(1).BeginEdit()
Dsset.tblQuestions.Rows(1).Item("ExamID") = "EDITED"
Dsset.tblQuestions.Rows(1).AcceptChanges()
taSet.Update(Dsset.tblQuestions)
private
void bindingNavigatorDeleteItem_Click(object
sender, EventArgs e)
{
[Code]....
code does not make chages to database when i reopen the application the records exists as earlier.
In my project,I used the wizard in VB.NET2008 Express to connect to my database. I have a data connector, adapter, and dataset controls on my form. I have been able to load the information into the dataset, and used the datCustomers.Customers.AddCustomersRow to add a new row to the dataset with information.
I now want to save the updated dataset to the database. I have tried using the adapterCustomers.Update(datCustomers) command to no avail. how to save the dataset to the database?
i am using VB2008 and i need to work out how to search a database. it probably will be very easy but i cant understand it and havent been able to find any tutorials that are for VB 2008, only for other things that wont work, mainly because i dont understand much of what is been written/said/coded.
But the search button (btnsearch) isnt doing anything when the code is tested.
Public Class Form4
Inherits System.Windows.Forms.Form
Dim Con As New OleDb.OleDbConnection
[Code].....
VB.NET i have only one colum in back end database that is roll. .. Now i want to update a particular data .. the data types is integer.. i has a data like 12 and i ant to update it 13 how can i do..
[Code]...
I've already finished the program and the last task was to add a password for my MS Access database. I've created the password in Ms Access and I've already modified the connection and saved the password but when I run the program all codes like this
Me.Table1TableAdapter.Fill(Me.Database1DataSet.Table1)got an error message says Not a valid password.
with MySQL + vb.net 2008 exp to create back up of MySQL database script file through vb.net
View 2 RepliesI have an app written in vb2005 that allows users to search a sql database for a store name. Once a store is selected, it then presents the user with 12 different tabs, each with a DataGridView showing various bits of info about the store. It's a large and convoluted database, so I'm using stored proceedures to pull the data for each tab. Here's a sample of one of the subs that populates the tabs.[code...]
Now, this works just fine to populate the grids on the tabs, and the same code is copied into each of the subs that fill the grids (changing the stored proc, parameter and grid names, of course). The problem I'm having is how to move changes made to the data in the grid back into the database.
I have stored procs that do this (and the procs do work), I just can't seem to figure out how to trigger the stored proc when the user makes a change.
If it matters, there is only a grid on each tab, I did not use a binding source as I am trying to keep an abstraction layer between the data and the app. I did create a dataset, which is how I gain access to the stored procs, but I left the grids unbound and (as seen in my code) bind them at run time.
I am developing a Visual Basic .NET application to be used by the staff of a small training centre nearby. The front-end (UI, menus, etc.) will all be in VB .NET, and there will be a back-end database for storing all of the required data, such as student records and meeting information. What I would like to know is if it's possible to use a Microsoft Access database for this purpose, and have it accessible by all the staff in the centre (on the same network) at the same time. For example, would I be able to put the database in a shared network folder, and have a copy of the VB application on each PC that would all be able to read/edit/add to the database?
View 2 Replies
