bound text boxes do not show adding new row

Question

I'm using a datagridview, bindingnavigator and textboxes hooked to a bindingsource (set in code). When I select row in the grid the contents show in the textboxes, all is well.

txtQty.DataBindings.Add("Text", bsInvoiceDetails, "Detail_Quantity");

Next I click the add on the binding navigator. It adds a blank row to the datagrid which is fine, but it does not clear the textboxes. The highlighted row in the grid is a different row. When I manually select the new row the textboxes still do not change.

If I type in the texboxes with the new row selected in the grid, it in fact changes a different rows values.

I can't figure out why this is our how to fix it.

• Help

Update:

Ran a query, returned a datatable... attached it to a dataset... the dataset is the datasource for the bindingsource ...

dsInvoiceDetails = new 
dsInvoiceDetails.Tables.Add(dtInvoiceDetails);

bsInvoiceDetails.DataSource = dsInvoiceDetails;
bsInvoiceDetails.DataMember = "Invoice_Detail";

Code to hook the grid and the binding navigator to the bindingsource...

gridInvoiceDetails.DataSource = bsInvoiceDetails;
bnInvoiceDetails.BindingSource = bsInvoiceDetails;

The binding source populates the textboxes above "automatically" when a grid row is selected. Works perfectly.

The binding navigator has a cool button to add rows. Click on that. It adds a row to the grid. Great. But when the new row is selected nothing changed with the bound text boxes.

I may need to handle the "AddingNew" event on the bindingsource...

Hope that helps define the question a bit more for ya.

Thanks for the help.

Answer 1

It has been a long time since I asked this, but it continues to get attention, so here is some additional info. I basically create a new instance of the invoice detail and assign it to the events NewObject.

So I did add an event that is triggered when adding a new row:

        bsInvoiceDetails.AddingNew += new AddingNewEventHandler(bsInvoiceDetails_AddingNew);

And Here is the code fired:

    void bsInvoiceDetails_AddingNew(object sender, AddingNewEventArgs e)
    {
        try
        {
            InvoiceDetail id = new InvoiceDetail();
            id.InvoiceID = invoice.InvoiceID;   // Make sure we are hooked to this invoice.
            id.DetailDate = DateTime.Today;
            id.DetailQuantity = 0;
            id.DetailRate = 0;
            id.DetailTotal = 0;
            id.DetailDescription = "* New Detail Description *";

            e.NewObject = id;
        }
        catch (Exception ex)
        {
            ErrorManager em = new ErrorManager(ex, "InvoiceEditForm.cs", "bsInvoiceDetails_ListChanged", "Adding a new detail item", "sql");
        }
    }

I think that is all I did to get around the problem. Feel free to post another question if this does not help resolve the problem for you.