Question

Currently my repository returns an IQueryable object that lists the data from my DB and I bind this to a BindingSource for use in a grid:

public void BindTo(IQueryable elements)
{
    BindingSource source = new BindingSource();
    source.CurrentChanged += new EventHandler(source_CurrentChanged);
    source.DataSource = elements;

    elementNavigator.BindingSource = source;
    elementGridView.DataSource = source;
}

This works great. However I am wanting to do some stuff when a user clicks an row in the grid. I’m struggling to identify the element that the user is selecting. I have the following:

In my view:

private void source_CurrentChanged(object sender, EventArgs e)
{
    _presenter.ElementChanged(sender, e);
}

In my presenter:

public void ElementChanged(object sender, EventArgs e)
{
    BindingSource source = (BindingSource)sender;
    // Here I need to get the ID of the selected element in the source.Current property.
    // HOW?
}

This seems to work ok – and I can see when debugging that source.Current contains the data:

? source.Current
{ BodyId = 1, IsInUse = true, IsValid = true, CreateDate = {04/07/2006 09:31:59}, LastUpdateDate = {04/07/2006 09:31:59}, StatusDescShort = "Exist" ... }
BodyId: 1
CreateDate: {04/07/2006 09:31:59}
IsInUse: true
IsValid: true
LastUpdateDate: {04/07/2006 09:31:59}
StatusDescShort: "Exist"

but I am at a loss as how I might access the value of BodyId. I’ve a feeling I’m missing something really obvious here (not the first time).

Answer 1

I’m surprised you’re not using something like IQueryable<MyType>.

Because then it would be a simple matter of casting: source.Current as MYType

And maybe eliminate an in-between DataRowView