Textbox to Datagridview to Access Database not updating

Hi guys,

Looking for some help with this one.

I have an access database which is being read into a datagrid view. When I type directly into the datagridview and press "Save" it saves perfectly. But when I edit by passing the field values to another form to be edited and then pass them back to the datagrid view, they won't save at all. They look like they've been saved and can be seen in the DGV but when I restart the program they are gone.

As my save procedure works when I input directly into a DGV it must be how I'm passing the values back to the DGV that they are not saving. They don't seem to be "binding" to the DGV once passed back.

Here's how I pass them:

Code:

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'Passing to the edit form

Dim indexPos As Integer = dgvStudents.CurrentCell.RowIndex
        frmEdit.txtEditRecordID.Text = Me.dgvStudents.Item("StudentID", indexPos).Value

        frmEdit.Show()
        Me.Hide()
           


'Passing back from the edit form to the DGV:

Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click

        Form3.SaveFromEdit()
        Me.Close()


    End Sub

Public Sub SaveFromEdit()
        Dim indexPos As Integer = dgvStudents.CurrentCell.RowIndex

        Me.dgvStudents.Item("student_IDNumber", indexPos).Value = frmEdit.txtEditStudentNumber.Text



        Save()

    End Sub

Public Sub Save()
        Me.Validate()
        Me.objStudentDA.Update(Me.objDataSet.Tables("tblStudent"))
        Me.objDataSet.AcceptChanges()

    End Sub

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Any help would be greatly appreciated!

Quote:

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They don't seem to be "binding" to the DGV once passed back.

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Correct. Because it's not registered as an edit, assigning values directly to dgv cells will not activate binding. You should assign the new values to the datatable and allow the binding to update the dgv in this case.

Quote:

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Originally Posted by dunfiddlin

Correct. Because it's not registered as an edit, assigning values directly to dgv cells will not activate binding. You should assign the new values to the datatable and allow the binding to update the dgv in this case.

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Thanks dunfiddlin!

How do I assign them to the datatable? When you say datatable do you mean database? Or is there a datatable for the the dgv?

Any advice would be really appreciated as I'm new to this and have been searching online for ages.

I'm assuming that the table Me.objDataSet.Tables("tblStudent") is the binding source so whatever you were doing to the datagridview, you simply do to that table instead. If you need some assistance with that, start with MSDN's tutorials.

Quote:

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Originally Posted by dunfiddlin

I'm assuming that the table Me.objDataSet.Tables("tblStudent") is the binding source so whatever you were doing to the datagridview, you simply do to that table instead. If you need some assistance with that, start with MSDN's tutorials.

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Thanks!

I read them but it doesn't explain why I can save them manually from within the DGV to the database but when I change the DGV from text boxes it won't save. Why is this?

As I said, the DGV must register changes as an edit to affect the bound table. Simply changing a cell value does not count. Now you can do it in code by locating the cell and calling the BeginEdit method but it's a tedious and occasionally tricky process so it's invariably better to simply change the datatable directly.

Quote:

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Originally Posted by dunfiddlin

As I said, the DGV must register changes as an edit to affect the bound table. Simply changing a cell value does not count. Now you can do it in code by locating the cell and calling the BeginEdit method but it's a tedious and occasionally tricky process so it's invariably better to simply change the datatable directly.

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Thanks! Got it working.