Totals Row in a DataGridView

Question

I am developing a winform application application. I wanted to show sum of columns in last row of each column. This row must always be visible.

At moment I am thinki

Answer 1

Even if this question is quite old-ish I'd like to propose an extension to Niraj Doshis answer. His answer holds true for a data bound DataGridView. I recently had the problem to calculate the summary in a user-editable DataGridView, whose solution differs in the details. Anyway It's quite straight-forward too. I am writing my functions on a higher abstraction level, which outlines the workflow, but elides the implementation details.

First of all you'll have to initialize the DataGridView, see

private void InitializeDataGridView()
{
    SetColumnTypes();
    AddEmptyRow();
    AddSummaryRow();
}

I set DataGridView.AllowUsersToAddRows to false for the new row would be located beneath the summary row. Hence I am adding an empty row, which the user may fill with his data. The summary row is set to ReadOnly since we do not want our user to edit it. Whenever a CellEndEdit is raised I am updating the DataGridView with the following method

private void UpdateDataGridView()
{
    RemoveSummaryRow();
    RemoveEmptyRows();
    UpdateRowNumbers();
    AddEmptyRow();
    AddSummaryRow();
}

First I remove the summary and all empty rows (you'll have to take care. If you are trying to delete the row you just edited an exception will be thrown. I've not yet figured out how to do this, but I just made up the solution. I'll amend when I came up with the solution.) Afterwards I'm setting a running number in each of the rows. This is not really required, but a detail of my implementation. At the end I add an empty row again which the user may use to add further data and then calculate and add the summary row.

As I said before this is not yet a ready-made solution, but rather I concept which works but with some quirks and bugs.