I made a connection with an Access database (Access 2016) using dataset, bindingsource, tableadapter, bindingnavigator, and datagridview.
It works, I can navigate in the datagridview, make changes, add and delete records in the datagridview, but these changes don't appear in the Access DB.
Data is loaded with:
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'FacturatieDataSet.Catalogus' table. You can move, or remove it, as needed.
CatalogusTableAdapter.Fill(FacturatieDataSet.Catalogus
End Sub
For deleting I use:
Private Sub BindingNavigatorDeleteItem_Click(sender As Object, e As EventArgs) Handles BindingNavigatorDeleteItem.Click
CatalogusBindingSource.RemoveCurrent()
CatalogusTableAdapter.Update(FacturatieDataSet.Catalogus)
End Sub
I'm new with VB 2015, I'm not a programmer, I do this for personnal study.
What is an (easy) solution to my problem?
You fill the datagridview but you don't update it (except when you delete a record).
Look up a tutorial on how to handle basic CRUD operations with a datagridview.
Related
I added my Enrollment system access Database, into my Enrollment System vb.net form, as a data source. The Database has 2 tables in it, the accountTable and studentEnrollmentInformation. I dragged The accountTable's details and data grid view into my form designer. The following code automatically appeared in the code designer:
Private Sub AccountTableBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs)
Me.Validate()
Me.AccountTableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.EnrollmentSystemDataBaseDataSet)
End Sub
Private Sub enrollmentSystem_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.AccountTableTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.accountTable)
End Sub
The following code works for updating the accounTableDataGridView but it does not work for studentEnrollmentInformationDataGridView so i manually created one
for studentEnrollmentInformation.
Function updateStudent()
Me.Validate()
Me.StudentEnrollmentInformationBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.EnrollmentSystemDataBaseDataSet)
Me.StudentEnrollmentInformationTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.studentEnrollmentInformation)
End Function
This is the function that contains the update code, that i manually created for updating the studentEnrollmentDataGridView. Adding new Row works fine but when i try to update studentEnrollmentDataGridView the texts in the table disappears and does not update/save. I also had function for updating the accountTableDataGridView which works fine.
Function update() 'THIS FUNCTION CONTAINS PRE-MADE CODE TO MAKE UPDATING SHORTER IN WRITING CODE.
Me.Validate()
Me.AccountTableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.EnrollmentSystemDataBaseDataSet)
Me.AccountTableTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.accountTable)
End Function
My Question is how do i update multiple Tables in my system? Updating the other table works fine but the other is not.
In the original auto-generated code, this is the line that retrieves the data in the first place:
Private Sub enrollmentSystem_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.AccountTableTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.accountTable)
End Sub
When the form loads, the Account data is retrieved into a DataTable that is already bound. If you want to retrieve Student Enrollment data too, do it in the same place:
Private Sub enrollmentSystem_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.AccountTableTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.accountTable)
Me.StudentEnrollmentInformationTableAdapter.Fill(Me.EnrollmentSystemDataBaseDataSet.studentEnrollmentInformation)
End Sub
Now you're populating both bound DataTables when the form loads. When it comes to saving, you do the same thing, i.e. add the code to save the changes to the other DataTable where you already have the code to save the first:
Private Sub AccountTableBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs)
Me.Validate()
Me.AccountTableBindingSource.EndEdit()
Me.StudentEnrollmentInformationBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.EnrollmentSystemDataBaseDataSet)
End Sub
You don't need any code to specifically save the changes from the DataTable because the whole point of UpdateAll is that it updates all DataTables in the DataSet.
As is always the case, if it doesn't seem to be working as you expect then you debug it. In that case, that would mean setting a breakpoint on the UpdateAll line and examining the exact state of the DataSet before and after the call, as well as possibly examing the sate of the database too.
I'm attempting to display an Access Database table in a DataGridView on the most simple form you could make. However, when I start the application I don't see any of the table data. See below.
I'm happy to update with any additional information needed.
VB:
Option Explicit On
Option Strict On
Option Infer Off
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'MOKANDataSet.SalaryHistory' table. You can move, or remove it, as needed.
Me.SalaryHistoryTableAdapter.Fill(Me.MOKANDataSet.SalaryHistory)
End Sub
Private Sub btnExit_Click(sender As Object, e As EventArgs) Handles btnExit.Click
Me.Close()
End Sub
End Class
Here is the application at runtime.
Overview of project in Visual Studio
I was curious and went directly to the executable in the bin folder. Upon execution, I got "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine. I'm using Win 7 64 Bit, but the Microsoft Office suite I have is 32-bit. I got the 32-bit AccessDatabase Engine referenced here
I want to ask how to refresh and update the datagridview data every 20 second.
What I want is when I adding the data into database, datagrdview will refresh and show the latest data that in database.
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
dgvRecord.Refresh()
End Sub
I tried in this way but it's no work.
Database part is OK but i had problem at refresh datagridview part.
hope can help me solve the question ,thank you!
I have a simple Windows form in VB: textbox bound thru an adapter and a bindingsource to my dataset.
I have a button that on Click I want it to update the database. The form loads and the first data row shows in the textbox, I change the text then click my button but no update happens.
Any ideas what I'm doing wrong, or how I should do this??
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.AToolsTableAdapter.Fill(Me.Qedsandb_TroyDataSet.aTools)
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
AToolsTableAdapter.Update(Qedsandb_TroyDataSet.aTools)
End Sub
End Class
Assuming the click event runs(?), TableAdapters based on a query (a join) do not, by default, have the ability to update the database. The name of your binding source suggests that you are using a query.
MSDN: TableAdapter Overview
The update functionality of a TableAdapter is dependent on how much
information is available based on the main query provided in the
TableAdapter Wizard. For example, TableAdapters that are configured to
fetch values from multiple tables (JOINs), scalar values, views, or
the results of aggregate functions are not initially created with the
ability to send updates back to the underlying database. However, you
can configure the INSERT, UPDATE and DELETE commands manually in the
Properties window.
You don't appear to be moving the data back from the form to the dataset. Try calling EndEdit on your bindingsource.
Setup Information
I have "Form1" with a DataGrid View ("DataGridView1") which populates with Data from an SQL server table.
It's a simple table, with about 10 records.
The table used is "jamesTestVBlol"
The dataset is named "DataSetJames.xsd"
I believe the table adaptor is called "JamesTestVBlolTableAdaptor"
Question
Is there a way, I can update a record and send these changes back to the server.
e.g. Column 1, record 1 I would like to change to "TEST" and update this table on the server.
The only code I have is:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'DataSetJames.jamesTestVBlol' table.' You can move, or remove it, as needed.
Me.JamesTestVBlolTableAdapter.Fill(Me.DataSetJames.jamesTestVBlol)
End Sub
End Class
Could anyone help me with where I need to look?
I've tried to read several online tutorials, but generally they are above my head.
Thanks,
James.