private void gridView1_CellValueChanging(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)

        {

            //此处4是单选框所在的列号

            if (e.Column.ColumnHandle != 4)

            {

                return;

            }

            for (int i = 0; i < gridView1.DataRowCount; i++)

            {

                //非当前行 置为 未选中状态

                if (i != e.RowHandle)

                {

                    //0表示 未选中

                    gridView1.GetDataRow(i)[e.Column.ColumnHandle] = "0";

                }

            }

        }

此时gridView1 .OptionsSelection.MultiSelect 设置与否 都不影响结果。

方法二：

  #region gridView1_RowCellClick事件

        private void gridView1_RowCellClick(object sender, DevExpress.XtraGrid.Views.Grid.RowCellClickEventArgs e)

        {

            if (e.Button == MouseButtons.Left) // 推断是否是用鼠标点击

            {

                DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo ghi = gridView1.CalcHitInfo(new Point(e.X, e.Y));

                if (ghi.InRow)  // 推断光标是否在行内

                {

                    //清空勾选项

                    for (int i = 0; i < gridView1.DataRowCount; i++)

                    {

                        if (gridView1.FocusedRowHandle != i)

                        {

                            gridView1.GetDataRow(i)["selected"] = false;

                        }

                    }

                    if ((bool)gridView1.GetDataRow(ghi.RowHandle)["selected"] == true)

                    {

                        gridView1.GetDataRow(e.RowHandle)["selected"] = false;

                    }

                    else

                    {

                        gridView1.GetDataRow(e.RowHandle)["selected"] = true;

                    }

                }

            }

        }

        #endregion

  #region  单选框控制

        private void gridView1_CellValueChanging(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)

        {

            if (e.Column.ColumnHandle != 0)

            {

                return;

            }

            for (int i = 0; i < gridView1.DataRowCount; i++)

            {

                //非当前行 置为 未选中状态

                if (i != e.RowHandle)

                {

                    //0表示 未选中

                    gridView1.GetDataRow(i)[e.Column.ColumnHandle] = "0";

                }

            }

        }

        #endregion