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.
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 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.
I am trying to make a form that functions as "READ/OPEN MAIL".. so what I want is to have multiple forms (which is a copy, with both the designer and form functions e.g. buttons and codes) when I open multiple mails.
I know how to create a new window but I do not know how to copy the designer codes and functions from anoher form and apply it to the newly created form. I have searched google but it only directs me to different questions. Thanks in advance!
All you have to do is create a variable of the type of your class, then show it using the Show method.
i.e.
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim myform As Form1 = New Form1
myform.Show()
End Sub
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.
Good morning all! Myself and a co-worker are tasked with a system-wide scripting solution but neither of us are .NET programmers so we need your help.
We have a GUI that displays a radio selection box (3 options) that are the three sites where our hospitals are. We need to dropdown located on the form to fill with only the locations based on the selected radio option.
my gui http://web6.twitpic.com/img/40330741-85d91a5637f2445b322e62df17cf3351.4aef01c5-full.jpg
Here is the code behind we have so far (sorry, VB)
Public Class frmCEHLI
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
End Sub
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 'CELocDataSet.dbo_Locations' table. You can move, or remove it, as needed.
Me.Dbo_LocationsTableAdapter.Fill(Me.CELocDataSet.dbo_Locations)
End Sub
Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
MsgBox("Submit button has been pressed")
End Sub
End Class
For the record the Location dropdown is currently databound but its a static SELECT statement which brings us all the locations but we'd prefer it to be cleaner if it only returned the locations based on Site. We are using Visual Basic 2008 Express Edition for development. Any help/code is appreciated, thanks!
Sorry not to respond back sooner, busy, and wanted to dig up a sample that did just what you were needing.
Create two comboboxes on your form. You can bind either fixed values, or from a table on the first combo. Then, from the property/events sheet, first set the "AutoPostBack" to TRUE, then on the events, click for the "SelectedIndexChanged" event to bring up some code.
The "Sender" object parameter will be the combobox itself, so you'll be able to analyse the property settings via debugging to find what key/value was chosen.
Then, run whatever query from your data querying control, business object, or whatever that gets your results, such as to a DataSet or DataTable.
Finally, set the datasource of your second combo to the above result query, set dataTextField and DataValueField and issue DataBind() to the combo.
That should get exactly what you need.
Then, when someone makes a selection from the second combo, you can have code within ITS "SelectedIndexChanged" event (also based on its AutoPostBack or actual submit button on the form).
Hope this helps.
I would create two combobox controls... One for the "where", then, on the InteractiveChange event by the user to post-back to the page using that answer for the second combobox of locations based on the "where" value of the first combo.