您正在操作错误的样式对象。请尝试以下操作：

private void datagridview1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if (e.ColumnIndex == 1 && e.Value as string == "Aborted")
    {
        e.CellStyle.BackColor = Color.Red;
        e.CellStyle.ForeColor = Color.White;
    }
}

奥利弗的解决方案非常适用于只为“Aborted”列着色的情况，但是为整行着色的解决方案如下（非常感谢Reddit的u/JTarsier）

// Use the event CellFormatting from Datagridview > Properties > Events
private void datagridview1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    // Use this one liner to check which number is associated with which column
    //(so you don't make the mistake of trying to use the wrong column like me ._.)
    
    // Debug.WriteLine($"{e.ColumnIndex} : '{e.Value}'");
    if (e.ColumnIndex == 0 && e.Value as string == "Aborted")
    {
        var style = datagridview1.Rows[e.RowIndex].DefaultCellStyle;
        style.BackColor = Color.Red;
        style.ForeColor = Color.White;
    }
}

谢谢你的帮助！