private void button1_Click(object sender, EventArgs e)
        {
            if (RadioButton1.Checked == true)
            {
                DataGridView1.Sort(new RowComparer(SortOrder.Ascending));
            }
            else if (RadioButton2.Checked == true)
            {
                DataGridView1.Sort(new RowComparer(SortOrder.Descending));
            }
        }

        private class RowComparer : System.Collections.IComparer
        {
            private static int sortOrderModifier = 1;

            public RowComparer(SortOrder sortOrder)
            {
                if (sortOrder == SortOrder.Descending)
                {
                    sortOrderModifier = -1;
                }
                else if (sortOrder == SortOrder.Ascending)
                {
                    sortOrderModifier = 1;
                }
            }

            public int Compare(object x, object y)
            {
                DataGridViewRow DataGridViewRow1 = (DataGridViewRow)x;
                DataGridViewRow DataGridViewRow2 = (DataGridViewRow)y;

                // Try to sort based on the Last Name column.
                int CompareResult = System.String.Compare(
                    DataGridViewRow1.Cells[1].Value.ToString(),
                    DataGridViewRow2.Cells[1].Value.ToString());

                // If the Last Names are equal, sort based on the First Name.
                if (CompareResult == 0)
                {
                    CompareResult = System.String.Compare(
                        DataGridViewRow1.Cells[0].Value.ToString(),
                        DataGridViewRow2.Cells[0].Value.ToString());
                }
                return CompareResult * sortOrderModifier;
            }
        }

执行完 DataGridView1.Sort(new RowComparer(SortOrder.Descending));
这句就不再实现public int Compare(object x, object y)
这个方法了。我的datagridview是拖到窗体中的，不像MSdN上是通过代码加法去的。请问哪位前辈能帮着解答下啊！先谢谢了……