自定义控件绑定数据只能读取，不能写入

Question

        [Bindable(BindableSupport.Yes), Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
        public new string Text
        {
            get
            {
                return this.DateApply.Text;
            }
            set
            {
                this.DateApply.Text = value;
            }
        }        private System.Windows.Forms.DomainUpDown DateApply;

Answer 1

运行控件时，没有不能输入啊，按照你的代码using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;namespace WindowsControlLibrary1
{    
    public partial class UserControl1 : UserControl
    {
        private DomainUpDown dd=new DomainUpDown ();
          
        public UserControl1()
        {
            InitializeComponent();
        }
        [Bindable(BindableSupport.Yes), Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]    
        private void UserControl1_Load(object sender, EventArgs e)
        {
            this.Controls.Add(dd);
        }
        public new string Text
        {
            get { return dd.Text; }
            set { dd.Text = value; }
        }
    }
}

Answer 2

上面的改下，
 [Bindable(BindableSupport.Yes), Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)] 写错地方了，呵呵。但还是没有你说的情况。 public partial class UserControl1 : UserControl
    {
        private DomainUpDown dd=new DomainUpDown ();
          
        public UserControl1()
        {
            InitializeComponent();
        }
        
        private void UserControl1_Load(object sender, EventArgs e)
        {
            this.Controls.Add(dd);
        }
        [Bindable(BindableSupport.Yes), Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]   
        [Category ("cc")]//分组显示
        public new string Text
        {
            get { return dd.Text; }
            set { dd.Text = value; }
        }

Answer 3

能输入啊，但绑定数据后，修改时它并不保存在数据集中，        我调用    this.BindingContext[DSOrder, "销售订单"].EndCurrentEdit();也不能把这个控件的ＴＥＸＴ文本保存入
DSOrder中．
其实我想做一个能按ＵＰ，ＤＯＷＮ键能够增加或减少一天的日期控件，用datetimepicker，把showupdown属性设为true时，确实也能用ＵＰ，ＤＯＷＮ键调整日期，但默认情况下它先调整年，再月，再日；这样很大容易搞错
所以我用   domainupdown控件做自定义控件，结果发现数据绑定无法更新到数据集中，
     private void DateApply_Enter(object sender, EventArgs e)
        {
            if (this.DateApply.Text.Length == 0)
            { this.DateApply.Text = DateTime.Now.ToShortDateString().Trim(); }
            else
            {
                DateTime dt = Convert.ToDateTime(DateApply.Text);
                DateApply.Items.Clear();
                DateApply.Items.Add(dt.AddDays(1).ToShortDateString().Trim());
                DateApply.Items.Add(dt.ToShortDateString().Trim());
                DateApply.Items.Add(dt.AddDays(-1).ToShortDateString().Trim());
                DateApply.SelectedIndex = 1;
            }
        }        private void DateApply_SelectedItemChanged(object sender, EventArgs e)
        {
            try
            {
                if ((DateApply.SelectedIndex != 1) && (DateApply.Focused))
                {
                    if (!DateApply.ReadOnly)
                    {
                        DateTime dt = Convert.ToDateTime(DateApply.Text);
                        DateApply.Items.Clear();
                        DateApply.Items.Add(dt.AddDays(1).ToShortDateString().Trim());
                        DateApply.Items.Add(dt.ToShortDateString().Trim());
                        DateApply.Items.Add(dt.AddDays(-1).ToShortDateString().Trim());
                    }
                    DateApply.SelectedIndex = 1;
                }
            }
            catch (System.Exception eUpdate)
            {
                MessageBox.Show(eUpdate.Message);
            }
        }

Answer 4

把text改成InnerText的确能保存数据，但Text为什么不能，还有如果要公司子控件的textchanged方法应该怎么做