Fill textboxes by clicking on DGV using BindingSource

From this thread I kind of get the idea of how to fill textboxes with records from a row by clicking on the datagridview but I have not quite got it right in practice.

My Code:

VB Code:

Private Sub frmEdit_Load( _
        ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles Me.Load
 
        Dim da As SqlDataAdapter
        Dim ds As DataSet = New DataSet
        da = New SqlDataAdapter("Select * " & _
           "From vShowEditData Where StoreID = '" & _
           StoreID & "' Order by CategoryCode, ItemCode", Con)
        da.TableMappings.Add("Table", "EditInv")
        Try
            da.Fill(ds)
            ds.Tables("EditInv").DefaultView.AllowNew = False
            dgvEditData.DataSource = ds.Tables("EditInv")
            myBindingSource.DataSource = ds.Tables("EditInv")
        Catch ex As Exception
            MessageBox.Show( _
                ex.Message & vbNewLine & _
                ex.Source, "Data Error", _
                MessageBoxButtons.OK)
        Finally
            da.Dispose()
            ds.Dispose()
        End Try
    End Sub
 
    Private Sub dgvEditData_RowHeaderMouseDoubleClick( _
        ByVal sender As Object, _
        ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) _
        Handles dgvEditData.RowHeaderMouseDoubleClick
 
        tbStart.DataBindings.Add("Text", myBindingSource, "OnHandQ")
    End Sub

On the first dbl Click it sets it to 0 every time and on the second dbl Click I get this error: This causes two bindings in the collection to bind to the same property. Parameter name: binding

This is wrong:

vb.net Code:

dgvEditData.DataSource = ds.Tables("EditInv")
myBindingSource.DataSource = ds.Tables("EditInv")

It should be like this:

vb.net Code:

myBindingSource.DataSource = ds.Tables("EditInv")
dgvEditData.DataSource = myBindingSource

Also, you should be setting the AllowNew property of the BindingSource, not the DefaultView.

If you want your TextBoxes, etc., to be populated with the same record's data when you select a row in the grid then you need to bind those TextBoxes, etc., to the same BindingSource as the grid.

Got it. Thanks. The only issue I have now is that if I select a second row I get the error mentioned above. Do I need to clear the databinding before I collect the row data (each time)? I tried DataBindings.Clear() But I get the same error.

VB Code:

Private Sub frmEdit_Load( _
        ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles Me.Load
 
        Dim da As SqlDataAdapter
        Dim ds As DataSet = New DataSet
        da = New SqlDataAdapter("Select * " & _
           "From vShowEditData Where StoreID = '" & _
           StoreID & "' Order by CategoryCode, ItemCode", Con)
        da.TableMappings.Add("Table", "EditInv")
        Try
            da.Fill(ds)
            myBindingSource.DataSource = ds.Tables("EditInv")
            dgvEditData.DataSource = myBindingSource
            myBindingSource.AllowNew = False
        Catch ex As Exception
            MessageBox.Show( _
                ex.Message & vbNewLine & _
                ex.Source, "Data Error", _
                MessageBoxButtons.OK)
        Finally
            da.Dispose()
            ds.Dispose()
        End Try
    End Sub
 
    Private Sub dgvEditData_RowHeaderMouseDoubleClick( _
        ByVal sender As Object, _
        ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) _
        Handles dgvEditData.RowHeaderMouseDoubleClick
        DataBindings.Clear()
        tbStart.DataBindings.Add("Text", myBindingSource, "OnHandQ")
    End Sub

jmcilhinney how do I make those text boxes change dynamically as I click on the grid? As it is now it complains after I choose a second row.

---------------------------
Data Error
---------------------------
This causes two bindings in the collection to bind to the same property.

Parameter name: binding

System.Windows.Forms
---------------------------
OK
---------------------------

Like I said, you bind the TextBoxes to the same BindingSource, e.g.

vb.net Code:

myBindingSource.DataSource = myDataTable
myDataGridView.DataSource = myBindingSource
myTextBox.DataBindings.Add("Text", myBindingSource, "SomeColumn")

When you select a record in the grid the Current property of the BindingSource is updated, which will in turn update the bound TextBox, as well as any other controls bound to the same source. It's all automatic once the bindings are set.