重写DEV的DateEdit控件的类只选择年月

　　最新在做CRM的报表，查询条件只需要年月，DateEdit 以及几个时间控件都用的不顺，强迫症犯了一怒之下起了重写DateEdit的想法

新建一个类

　　CXDateEdit

using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Calendar;
using DevExpress.XtraEditors.Controls;
using DevExpress.XtraEditors.Popup;
using DevExpress.XtraEditors.Repository;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MLTY.Business.Report
{
   public class CXDateEdit : DateEdit
    {
        public CXDateEdit()
        {
            Properties.VistaDisplayMode = DevExpress.Utils.DefaultBoolean.True;
            Properties.DisplayFormat.FormatString = "yyyy-MM";
            Properties.DisplayFormat.FormatType = DevExpress.Utils.FormatType.DateTime;
            Properties.Mask.EditMask = "yyyy-MM";
            Properties.ShowToday = false;
        }

        protected override PopupBaseForm CreatePopupForm()

        {

            if (Properties.VistaDisplayMode == DevExpress.Utils.DefaultBoolean.True)

                return new CustomVistaPopupDateEditForm(this);

            return new PopupDateEditForm(this);

        }

        private DateResultModeEnum _dateMode = DateResultModeEnum.FirstDayOfMonth;

        public DateResultModeEnum DateMode

        {

            get { return _dateMode; }

            set { _dateMode = value; }

        }

        public enum DateResultModeEnum : int

        {

            //虽然是年月控件，但日期Datetime肯定是2012-01-01这种格式

            //所以，这个枚举定义了年月控件返回本月的第一天，还是本月的最后一天作为DateEditEx的值

            FirstDayOfMonth = 1,

            LastDayOfMonth = 2

        } 

    }

    public class CustomVistaPopupDateEditForm : VistaPopupDateEditForm

    {

        public CustomVistaPopupDateEditForm(DateEdit ownerEdit) : base(ownerEdit) { }

        protected override DateEditCalendar CreateCalendar()

        {

            return new CustomVistaDateEditCalendar(OwnerEdit.Properties, OwnerEdit.EditValue);

        }

    }

    public class CustomVistaDateEditCalendar : VistaDateEditCalendar

    {

        public CustomVistaDateEditCalendar(RepositoryItemDateEdit item, object editDate) : base(item, editDate) { }

        protected override void Init()

        {

            base.Init();

            this.View = DateEditCalendarViewType.YearInfo;

        }

        public CXDateEdit.DateResultModeEnum DateMode

        {

            get { return ((CXDateEdit)this.Properties.OwnerEdit).DateMode; }

        }

        protected override void OnItemClick(DevExpress.XtraEditors.Calendar.CalendarHitInfo hitInfo)

        {

            DayNumberCellInfo cell = hitInfo.HitObject as DayNumberCellInfo;

            if (View == DateEditCalendarViewType.YearInfo)

            {

                DateTime dt = new DateTime(DateTime.Year, cell.Date.Month, 1, 0, 0, 0);

                if (DateMode == CXDateEdit.DateResultModeEnum.FirstDayOfMonth)

                {

                    OnDateTimeCommit(dt, false);

                }

                else

                {

                    DateTime tempDate = dt.AddMonths(1).AddDays(-1);

                    tempDate = new DateTime(tempDate.Year, tempDate.Month, tempDate.Day, 23, 59, 59);

                    OnDateTimeCommit(tempDate, false);

                }

            }

            else

                base.OnItemClick(hitInfo);

        }

    }

}

　　然后在窗体xxx上拖一个dateedit ，进入xxx.Designer.cs 将设计器代码 this.dateedit =new DevExpress.XtraEditors.DateEdit();

改成 重写的类

原博地址：http://www.cnblogs.com/axing/p/3201066.html