CODEWITHSUNDEEP
c#winformsdata-bindingdatagridview
Yabbie
Yabbie

Reputation: 495

How to force datagridview to reorder rows after change to datasource

I have a List<MyClass> which is a datasource to a BindingSource. That BindingSource is in turn the datasource to my datagridview.

When I change a value in my underlying list, and call datagridview.Refresh() the change in value is reflected.

However, when I sort my underlying list, the change is NOT reflected in my datagridview. I expect/want the rows in the datagridview to be in the order of my underlying list.

I've tried doing a BindingSource.RestetBindings() which doesn't work, and has other implications I don't like.

I don't imagine I should be sorting the actual rows in the DGV, but I could be wrong? It would seem silly to sort the datasource and then have to sort the DGV too.

Upvotes: 1

Views: 1489

Answers (1)

Loathing
Loathing

Reputation: 5266

Seems to work fine:

public class Person : IComparable<Person> {
    public int Id { get; set; }
    public String Name { get; set; }

    public int CompareTo(Person other) {
        return Name.CompareTo(other.Name);
    }
}

DataGridView dgv = new DataGridView();
List<Person> pList = new List<Person>();
BindingSource pSource = new BindingSource();
public MyForm() {
    pList.Add(new Person { Id = 1, Name = "Bob" });
    pList.Add(new Person { Id = 2, Name = "Alan" });
    pSource.DataSource = pList;
    dgv.DataSource = pSource;

    FlowLayoutPanel p = new FlowLayoutPanel { Dock = DockStyle.Fill };
    p.Controls.Add(btn);
    p.Controls.Add(dgv);
    Controls.Add(p);
    btn.Click += btn_Click;
}

void btn_Click(object sender, EventArgs e) {
    pList.Sort();
    dgv.Refresh();
}

Upvotes: 1

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