C#•11mo ago

WinForms DataGridView complex binding

Is this possible to bind on datagrid view? I have this class Relation, which is objects are populated in dropdown:

public class Relation
{
    public string City { get; set; } = default!;
    public int Kilometers { get; set; }
}

public class Relation
{
    public string City { get; set; } = default!;
    public int Kilometers { get; set; }
}

And this class Travle which should be DataSource of data grid view:

public class Travle
{
    public Relation {get; set; } = default!;

    public int Count { get; set; }
}

public class Travle
{
    public Relation {get; set; } = default!;

    public int Count { get; set; }
}

In picture you will see what I want to bind, so when I select Relation from first coulmn it should show Kilometers and when I enter Count it should create new object in DataSource. Why this doesn't work when I have

dataGridViewTravles.DataSource = new List<Travle>();

dataGridViewTravles.DataSource = new List<Travle>();

I don't have option to add rows in data grid view? P.S Application is written in WinForms.

2 Replies

Mayor McCheese•11mo ago

Try to add a call to the data grid refresh after re|setting the data source

Mayor McCheese•11mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.refresh?view=windowsdesktop-8.0

Control.Refresh Method (System.Windows.Forms)

Forces the control to invalidate its client area and immediately redraw itself and any child controls.

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WinForms DataGridView complex binding

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