玩转控件：重绘DEVEXPRESS中DateEdit控件 —— 让DateEdit支持只选择年月 (提供源码下载)

  前言

上一篇博文《玩转控件：重绘ComboBox —— 让ComboBox多列显示》中，根据大家的回馈，ComboBox已经支持筛选了，更新见博文最后最后最后面.

  奇葩

这两天遇到一个很“诡异”的情况，之前手机拦截短信一直用腾讯手机管家，这两天发神经，把腾讯手机管家卸载掉，换成360手机管家。然后一如既往的设置好闹钟，睡觉.. 结果尼玛一觉睡到自然醒！拿过手机一看11:35am，手机闹钟居然没响！我很希望今天是星期六，为此我还狠劲的捏了下我白里透红的小脸，却无法扭转今天星期五的窘境。 这还不是最奇葩的，奇葩的是，我拿起手机惊奇的发现：360不见了...腾讯也不见了...闹钟也不响了...我凌乱了. 不知道有没有人遇到过类似的问题、

  缘由

这两天在维护DevExpress控件开发的报表，测试人员提出报表查询条件需要按月查询，我木讷的对着Dev自带的DateEdit控件许久，又找了几个Dev其他的时间控件，没有一个可以达到需求标准，于是有了下文：本篇博文代码部分来自网络,地址:http://www.devexpress.com/Support/Center/Question/Details/CQ60337

  故技重施：新建组件类

根据最近看了3遍的《新三国演义》中，诸葛亮占荆州后收取零陵时，一屠夫的话："说出吾名，吓汝一跳"。随将该组件类前缀用鄙人姓名字母的缩写，使其继承DevExpress的DateEdit控件类，如下：

  public partial class KzxDateEdit : DateEdit

我用的DevExpress控件是v10.1的，经过测试DevExpress神似在v7.1以上才支持Vista模式.（此处未经考证，如官方人员发现，请将此言论归为 大言不惭 之类别！）

下面贴出核心代码：

 public partial class KzxDateEdit : DateEdit
    {
        public KzxDateEdit()
        {
            InitializeComponent();
            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;
        }

        public KzxDateEdit(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }
        protected override PopupBaseForm CreatePopupForm()
        {
            if (Properties.VistaDisplayMode == DevExpress.Utils.DefaultBoolean.True)
                return new CustomVistaPopupDateEditForm(this);
            return new PopupDateEditForm(this);
        }

    }
    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;
        }

        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, , , , );

                DateTime tempDate = dt.AddMonths().AddDays(-);
                tempDate = new DateTime(tempDate.Year, tempDate.Month, tempDate.Day, , , );
                OnDateTimeCommit(tempDate, false);
            }
            else
                base.OnItemClick(hitInfo);
        }
    }

   回到窗体，重新定义窗体设计器的代码InitializeComponent()

没错，仍然需要使出拖控件大法，将DevExpress中DateEdit控件拖到窗体中，然后将窗体的设计代码中InitializeComponent()方法剪切到窗体的.cs文件中，然后重新制定该DateEdit控件实例化对象即可。

 //this.dateEdit1 = new DevExpress.XtraEditors.DateEdit();
   this.dateEdit1 = new KzxDateEdit();

下面是运行效果图：

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" 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   源码下载链接

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