Is it possible to display empty string instead of 0 in DataGridView int columns?

问题

I have a DataTable filled with information about audio tracks. DataTableColumn that stores the track number is of a UInt32 type so when I display the DataTable in DataGridView, I'm able to sort data by that column. For tracks when there is no track number I've got 0 in DataTable.

data.Tables["active"].Columns["Track"].DataType = Type.GetType("System.UInt32");

Is it possible to display every 0 in that column in DataGridView as an empty string (nothing)? But still have it stored as UInt32 0 in DataTable to be able to sort the tracks?

回答1:

Sure, you can use the CellFormatting event:

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if (dataGridView1.Columns[e.ColumnIndex].DataPropertyName == "Track")
    {
        uint value = (uint)e.Value;
        if (value == 0)
        {
            e.Value = string.Empty;
            e.FormattingApplied = true;
        }
    }
}

回答2:

just a small suggestion ... add another column with "System.String" and make it's value equal to Track column (hide track column) and then you can replace 0 with empty string in the new visible column

来源：https://stackoverflow.com/questions/16753230/is-it-possible-to-display-empty-string-instead-of-0-in-datagridview-int-columns