創建asp.net服務器控件模板

Question

我正在嘗試爲我的服務器控件（標題模板和內容模板）創建模板。

<uc:MyControl ID="myConrol1" runat="server"> 
    <CaptionTemplate> 
     <%# Eval("MyCaption") %> 
    </CaptionTemplate> 
    <ContentTemplate> 
     <b><%# Eval("MyContent") %></b> 
    </ContentTemplate> 
</uc:MyControl> 

然後再給與數據源的模板

var ds = new List<CarouselItem> 
       { 
        new CarouselItem() 
         { 
          MyCaption = "Slide 1 caption", 
          MyContent = "Slide 1 content" 
         }, 
        new CarouselItem() 
         { 
          MyCaption = "Slide 2 caption", 
          MyContent = "Slide 2 content" 
         } 
       }; 

myConrol1.DataSource = ds; 
myConrol1.DataBind(); 

但是我已經試過沒有爲我工作。以下是我試圖實現此功能的代碼。

[Browsable(false), DefaultValue(null), Description("The content template."), TemplateContainer(typeof(MyItemContainer)), PersistenceMode(PersistenceMode.InnerProperty)] 
public virtual ITemplate ContentTemplate { get; set; } 

[Browsable(false), DefaultValue(null), Description("The caption template."), TemplateContainer(typeof(MyItemContainer)), PersistenceMode(PersistenceMode.InnerProperty)] 
public virtual ITemplate CaptionTemplate { get; set; } 

然後我創建

public class MyItemContainer : WebControl, INamingContainer 
     { 
      private readonly MyItem item; 
      public MyItemContainer (MyItem ai) 
      { 
       item = ai; 
      } 

      public MyItem DataItem 
      { 
       get { return item; } 
      } 
     } 

然後在綁定的方法寫InstantiateIn這一類

foreach (object dataSourceObject in ds) 
      { 
       var item = new MyItem 
        { 
         Caption = new PlaceHolder(), 
         Content = new PlaceHolder(), 
         DataItem = dataSourceObject 
        }; 

       if (ContentTemplate != null) 
       { 
        MyAccordionItemContainer cc = new MyAccordionItemContainer(item); 
        ContentTemplate.InstantiateIn(cc); 
        item.Content.Controls.Add(cc); 
       } 

       if (CaptionTemplate != null) 
       { 
        MyAccordionItemContainer cc = new MyAccordionItemContainer(item); 
        CaptionTemplate.InstantiateIn(cc); 

        item.Caption.Controls.Add(cc); 
       } 

       item.DataBind(); 
      } 

頁無一切都是空的，而不是綁定。似乎我沒有在實例化過程中使用dataSourceObject，但我不確定如何使用他。有沒有人有任何想法嗎？

Answer 1

而不是從WebControl類繼承，你可能想看看DataBoundControl，而不是重寫「PerformDataBinding」方法。

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.databoundcontrol(v=vs.100).aspx