[Umbraco] Data Type的扩展编程

继续从上面的Data Types的自定义控件说起。前面用到了自定义控件的数据绑定，虽然这使得我们可以调用外部数据了，但这似乎还比较死板，如果再调用其他数据，还得再创建一个控件，那样的话就会出现类似的功能性控件，复用率不高，而且维护起来也不方便，其实有更好的方法实现，

看下面的代码

 .ascx file:

<%@ Control Language="C#" AutoEventWireup="true"     CodeBehind="Demo.ascx.cs"     Inherits="UmbracoCreateCustomDatatypeWithWrapper.Demo" %>

<asp:DropDownList ID="control" runat="server"> </asp:DropDownList> 

.ascx.cs file (code behind)

using System; 
using System.Data; 
using System.Web; 
using System.Web.UI.WebControls; 
using umbraco.cms.businesslogic.datatype; 
using umbraco.editorControls.userControlGrapper;
using Microsoft.ApplicationBlocks.Data; 

namespace UmbracoCreateCustomDatatypeWithWrapper 
{
    public class Demo :  UserControl,  IUsercontrolDataEditor
    {
        [DataEditorSetting("Connection string")]
        public string ConnectionString { get; set; }

        [DataEditorSetting("Select statement")]
        public string SelectStatement { get; set; }

        [DataEditorSetting("Text column")]
        public string TextColumn { get; set; }

        [DataEditorSetting("Value column")]
        public string ValueColumn { get; set; }

        public string umbracoValue;

        protected void Page_Load(object sender, EventArgs e)
        {
            if (Page.IsPostBack)
            {
                //onsave
                value = control.SelectedValue;
            }
            else
            {
                control.DataSource = SqlHelper.ExecuteReader(
                    ConnectionString,
                    CommandType.Text,
                    SelectStatement);
                control.DataTextField = TextColumn;
                control.DataValueField = ValueColumn;
                control.DataBind();
                control.Items.Insert(0, new ListItem(String.Empty, String.Empty));

                control.SelectedIndex = 0;
                if (value != null)
                    control.SelectedValue = value.ToString();
            }
        }

        public object value
        {
            get
            {
                return umbracoValue;
            }
            set
            {
                umbracoValue = value.ToString();
            }
        }
    }
}

如下使用

显示效果

这样是不是更好一点呢。