如何在转发器中访问 XML 子节点

Question

我正在尝试弄清楚如何使用我的 asp.net Web 表单应用程序中的中继器访问序列化 xml 数据中的子节点。我可以访问第一层上的所有 xml 元素数据，但不能访问第二层(好处(。

我的问题是我无法访问中继器中的Item.Benefits.BenefitImage或Item.Benefits.Benefit。

任何指针将不胜感激。

这是我的 xml 数据片段：

<Category Key="acid" Rank="30">
<Intro> ... </Intro>
<Description> ... </Description>
<Benefits>
<Benefit Key="promote_texture">Promote smoother skin texture</Benefit>  
<Benefit Key="promote_tone">Promote even skin tone</Benefit>
<Benefit Key="enhance_radiance">Enhance skin radiance</Benefit>      
</Benefits>
</Category>

下面是 中转发器的代码段。ASPX 页：

<asp:Panel runat="server" CssClass="benefits-wrapper">
<asp:Repeater ID="BenefitsList" runat="server" ItemType="OrdinarySite.Models.ProductCategory" SelectMethod="CategoryList_GetData">
<ItemTemplate>
<div class="benefits">                                 
<div class="benefit">
<asp:Image runat="server" CssClass="benefit-img" ImageUrl="<%# Item.Benefits.BenefitImage %>" />
<asp:Label runat="server" CssClass="benefit-desc" Text="<%# Item.Benefits.Benefit %>"></asp:Label>
</div>                                                               
</div>
<div class="benefits-copy">
<asp:Label runat="server" CssClass="heading" Text="<%# Item.Name %>"></asp:Label>
<p><%# Item.Description %></p>
</div>
</ItemTemplate>
</asp:Repeater>
</asp:Panel>

下面是 中转发器的代码段。ASPX.CS页：

public partial class Category : BasePage
{
public string categoryKey;
protected void Page_Load(object sender, EventArgs e)
{
var key = (string)RouteData.Values["key"];
categoryKey = key;
if (categoryKey != null) {
this.Title = categoryKey;
} else {
Response.Redirect("~/", true);
}
}
public IEnumerable<ProductCategory> CategoryList_GetData() => CacheObject.Categories.Where(x => x.Key == categoryKey);        
}

以下是该类的一个片段：

namespace Site.Models
{
[Serializable]
public class ProductCategory : IComparable<ProductCategory>
{
[XmlAttribute]
public string Key { get; set; }
[XmlAttribute]
public int Rank { get; set; }
[XmlAttribute]
public string Naming { get; set; }
[XmlIgnore]
public List<Product> Products { get; set; }
public string Name => Resources.ProductCategory.ResourceManager.GetString(Key);
public int CompareTo(ProductCategory other) => this.Rank - other.Rank;
public static string XmlFileName => HostingEnvironment.MapPath("~/App_Data/categories.xml");
public string Intro { get; set; }
public string Description { get; set; }
[XmlArray("Benefits"), XmlArrayItem("Benefit")]
public List<BenefitsList> Benefits { get; set; }
[Serializable]
public class BenefitsList
{
[XmlAttribute]
public string Key { get; set; }
[XmlElement]
public string Benefit { get; set; }
public string BenefitImage => $"~/Images/category/benefits/{Key}.svg";
}       
public static List<ProductCategory> LoadXmlData( List<Product> products )
{
var cats = SerializerSupport.DeserializeList<ProductCategory>( XmlFileName );
foreach( var c in cats )
{
c.Products = products
.Where( x => x.Details != null && string.Equals( c.Key, x.Details.CategoryKey, StringComparison.OrdinalIgnoreCase ) )
.OrderBy(x => x.Details.Title).ToList();
c.Products.ForEach( x => x.Category = c );
}
cats.Sort();
return cats;
}
}

Answer 1

您需要使用嵌套转发器在转发器中显示Benefits，如下所示。请参见：嵌套转发器。

<asp:Panel runat="server" CssClass="benefits-wrapper">
<asp:Repeater ID="BenefitsList" runat="server" ItemType="OrdinarySite.Models.ProductCategory" SelectMethod="CategoryList_GetData">
<ItemTemplate>
<div class="benefits">   
<asp:Repeater runat="server" DataSource='<%# Eval("Item.Benefits") %>'>
<div class="benefit">
<asp:Image runat="server" CssClass="benefit-img" ImageUrl="<%# BenefitImage %>" />
<asp:Label runat="server" CssClass="benefit-desc" Text="<%# Benefit %>"></asp:Label>
</div>  
</asp:Repeater>                                                           
</div>
<div class="benefits-copy">
<asp:Label runat="server" CssClass="heading" Text="<%# Item.Name %>"></asp:Label>
<p><%# Item.Description %></p>
</div>
</ItemTemplate>
</asp:Repeater>
</asp:Panel>