[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)

 1 using System; 

 2 using System.Data; 

 3 using System.Web; 

 4 using System.Web.UI.WebControls; 

 5 using umbraco.cms.businesslogic.datatype; 

 6 using umbraco.editorControls.userControlGrapper;

 7 using Microsoft.ApplicationBlocks.Data; 

 8 

 9 namespace UmbracoCreateCustomDatatypeWithWrapper 

10 {

11     public class Demo :  UserControl,  IUsercontrolDataEditor

12     {

13         [DataEditorSetting("Connection string")]

14         public string ConnectionString { get; set; }

15 

16         [DataEditorSetting("Select statement")]

17         public string SelectStatement { get; set; }

18 

19         [DataEditorSetting("Text column")]

20         public string TextColumn { get; set; }

21 

22         [DataEditorSetting("Value column")]

23         public string ValueColumn { get; set; }

24 

25         public string umbracoValue;

26 

27         protected void Page_Load(object sender, EventArgs e)

28         {

29             if (Page.IsPostBack)

30             {

31                 //onsave

32                 value = control.SelectedValue;

33             }

34             else

35             {

36                 control.DataSource = SqlHelper.ExecuteReader(

37                     ConnectionString,

38                     CommandType.Text,

39                     SelectStatement);

40                 control.DataTextField = TextColumn;

41                 control.DataValueField = ValueColumn;

42                 control.DataBind();

43                 control.Items.Insert(0, new ListItem(String.Empty, String.Empty));

44 

45                 control.SelectedIndex = 0;

46                 if (value != null)

47                     control.SelectedValue = value.ToString();

48             }

49         }

50 

51         public object value

52         {

53             get

54             {

55                 return umbracoValue;

56             }

57             set

58             {

59                 umbracoValue = value.ToString();

60             }

61         }

62     }

63 }

View Code

 

如下使用

显示效果

这样是不是更好一点呢。