Question

I have a datagridview, and I want to remove a particular row from it (datagridview is not data bound). To remove, I need the index of the row. Datagridview items are all objects. At this moment, all I have is the id (a property) of the object. I want to know the index of the row in datagridview which holds the object of id, say 2.

How do I accomplish this? Or is there another way of deleting a row based on an object’s value?

Answer 1

There’s probably a cleaner way, but with LINQ:

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) {
    return dataGrid.Rows.Cast<MyRowObj>().Select((row, index) => new {
        index,
        row
    }).Where(x => x.row.id == id).Select(x => x.index).First();
}

and without LINQ:

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) {
    for (int i = 0; i < dataGrid.Rows.Count; i += 1) {
        MyRowObj row = (MyRowObj)dataGrid.Rows[i].Tag; // or.DataBoundItem;
        if (row.id == id) {
            return i;
        }
    }

    throw new ArgumentException("No item with specified id exists in the dataGrid.", "id");
}