学步园

            System.Windows.Forms.ComboBox comboName = new System.Windows.Forms.ComboBox();
            this.comboName.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.comboName.FormattingEnabled = true;
            this.comboName.Items.AddRange(new object[] {
            "今日进货",
            "本月进货",
            "本季度进货",
            "本年度进货"});
            DateTime beginDate = DateTime.Today, endDate = DateTime.Today;
            int year = DateTime.Now.Year;
            int month = DateTime.Now.Month;
            switch (comboName.SelectedIndex)
            {
                case 0:
                    break;
                case 1:
                    beginDate = new DateTime(year, month, 1);
                    endDate = new DateTime(year, month, Application.CurrentCulture.Calendar.GetDaysInMonth(year, month));
                    break;
                case 2:
                    switch ((month + 2) / 3)
                    {
                        case 1:
                            beginDate = new DateTime(year, 1, 1);
                            endDate = new DateTime(year, 3, 31);
                            break;
                            case 2:
                            beginDate = new DateTime(year, 4, 1);
                            endDate = new DateTime(year, 6, 30);
                            break;
                            case 3:
                            beginDate = new DateTime(year, 7, 1);
                            endDate = new DateTime(year, 9, 30);
                            break;
                            case 4:
                            beginDate = new DateTime(year, 10, 1);
                            endDate = new DateTime(year, 12, 31);
                            break;
                    }
                    break;
                case 3:
                    beginDate = new DateTime(year, 1, 1);
                    endDate = new DateTime(year, 12, 31);
                    break;
            }
dataView.RowFilter = string.Format("'#{0}#'<=OverDate and OverDate<='#{1}#'", beginDate, endDate);