c# - ASP.NET:构建以列表作为参数的用户控件？

Question

如何构建一个将列表作为参数的用户控件，即:

<foo:TabMenu runat="server">
<Tabs>
<Tab Label="Tab1" PanelId="pnlTab1"/>
<Tab Label="Tab2" PanelId="pnlTab2"/>
<Tab Label="Tab3" PanelId="pnlTab3"/>
</Tabs>
</foo:TabMenu>

Answer 1

你需要这样的东西。一切正常，但您必须完成 TabCollection 类。

编辑:请原谅，我没有测试代码。总之发现了一些问题所以解决了。

用户控件

[ParseChildren(true, "Tabs"), PersistChildren(false)]
public partial class TabMenu : UserControl
{

    private TabCollection _tabs;

    [Browsable(false), PersistenceMode(PersistenceMode.InnerProperty), MergableProperty(false)]
    public virtual TabCollection Tabs
    {
        get
        {
            if (this._tabs == null)
                this._tabs = new TabCollection(this);
            return this._tabs;
        }
    }

    protected override ControlCollection CreateControlCollection()
    {
        return new TabMenuControlCollection(this);
    }

}

制表符

public class Tab : HtmlGenericControl
{

    public string Label
    {
        get { return (string)ViewState["Label"] ?? string.Empty; }
        set { ViewState["Label"] = value; }
    }

}

选项卡集合

public class TabCollection : IList, ICollection, IEnumerable
{

    private TabMenu _tabMenu;

    public TabCollection(TabMenu tabMenu)
    {
        if (tabMenu == null)
            throw new ArgumentNullException("tabMenu");

        this._tabMenu = tabMenu;
    }

    public virtual int Add(Tab tab)
    {
        if (tab == null)
            throw new ArgumentNullException("tab");

        this._tabMenu.Controls.Add(tab);

        return this._tabMenu.Controls.Count - 1;
    }

    int IList.Add(object value)
    {
        return this.Add((Tab)value);
    }

    // You have to write other methods and properties as Add.

}

TabMenuControlCollection

public class TabMenuControlCollection : ControlCollection
{

    public TabMenuControlCollection(TabMenu owner) : base(owner) { }

    public override void Add(Control child)
    {
        if (child == null)
            throw new ArgumentNullException("child");

        if (!(child is TabMenu))
            throw new ArgumentException("The TabMenu control can only have a child of type 'Tab'.");

        base.Add(child);
    }

    public override void AddAt(int index, Control child)
    {
        if (child == null)
            throw new ArgumentNullException("child");

        if (!(child is TabMenu))
            throw new ArgumentException("The TabMenu control can only have a child of type 'Tab'.");

        base.AddAt(index, child);
    }

}