Create custom controls with inner html c#

how can i create a custom control that accepts a inner html, like the usual .net datagrid or aja开发者_如何学Gox tabbed control... something like this:

<KITT:tabs id="s" runat="server" >
 <w:tab sectionid="benefits">
here goes my html or any content, i want to render as is
 </w:tab>
</KITT:tabs>

I know how to create that with no inner html, a Tab object, a list of Tabs, then using

[ParseChildren(true,"MyTabs")]

in the control... but i dont know where to go from there, any hints?

This is the strategy I use, which I think is the easiest. This one is a Panel (which is rendered as a div), and is a server control (no ascx):

public class Tab : Panel {

    private Literal InnerHtmlLiteral { get; set; }

    [Bindable(true)]
    [Category("Appearance")]
    [DefaultValue("")]
    [Localizable(true)]
    [PersistenceMode(PersistenceMode.InnerDefaultProperty)] // this is the significant attribute.
    public string InnerHtml {
        get { return InnerHtmlLiteral.Text; }
        set { InnerHtmlLiteral.Text = value; }
    }

    public Tab() {
        InnerHtmlLiteral = new Literal();
    }

    protected override void OnInit(EventArgs e) {
        base.OnInit(e);
        Controls.Add(InnerHtmlLiteral);
        InnerHtmlLiteral.ID = ID + "_InnerHtml";
    }
}

No messing around with templates, and very few special attributes needed in order to make it work. I'm just using a string as the property and then rendering it using a Literal control.

combining the answer about custom controls in general: custome child controls

and MSDN Templated Conrols

the right way to go about this is very simple, once creating and defining the child element in a namespace (because you need to cross reference it), it should have one added property: the Tab class looks like this

namespace MyNS.Content {
public class Tab : System.Web.UI.UserControl
{

    private string _title;

    public Tab()
        : this(String.Empty)
    {
    }

    public Tab(string title)
    {
        _title = title;
    }

    public string Title
    {
        get { return _title; }
        set { _title = value; }
    }

    private ITemplate tabContent = null;
    [
    TemplateContainer(typeof(TemplateControl)),
    PersistenceMode(PersistenceMode.InnerProperty),
    TemplateInstance(TemplateInstance.Single),
    ]
    public ITemplate TabContent
    {
        get
        {
            return tabContent;
        }
        set
        {
            tabContent = value;
        }
    }

}
}

This will allow the tabcontent child to your main tag

in your control ascx create the necessary [ParseChildren(true, "MyTabs")] and bind your MyTabs list or collection to a repeater, this will output all contained tabs, your ascx looks like this

<asp:repeater id="rpContent" runat="server" onitemdatabound="rpContent_itemdatabound">
<itemtemplate>
    <asp:hyperlink id="hlHeader" runat="server" navigateurl="javascript://"></asp:hyperlink>

        <div>
            <asp:placeholder id="plTabContent" runat="server"></asp:placeholder>
        </div>

</itemtemplate>

the code behind looks like this

[ParseChildren(true, "MyTabs")]
public partial class KITT_controls_tabgroup : System.Web.UI.UserControl
{
    private List<Tab> _myTabs;
    [PersistenceMode(PersistenceMode.InnerProperty)]
    public List<Tab> MyTabs
    {
        get
        {
            if (_myTabs == null)
            {
                _myTabs = new List<Tab>();
            }
            return _myTabs;
        }

    }

    protected void Page_Load(object sender, EventArgs e)
    {
        rpContent.DataSource = MyTabs;
        rpContent.DataBind();

    }
    protected void rpContent_itemdatabound(Object Sender, RepeaterItemEventArgs e)
    {

        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            Tab i = e.Item.DataItem as Tab;
            i.TabContent.InstantiateIn(((PlaceHolder)e.Item.FindControl("plTabContent")));

            ((HyperLink)e.Item.FindControl("hlHeader")).Text = i.Title;
        }
    }
}

finally, register your controls (both Tab and ascx)

<add tagPrefix="w" namespace="MyNS.Content" />
<add tagPrefix="KITT" tagName="TabbedContent" src="~/controls/tabbedcontent.ascx"/>

and use it...

 <kitt:tabbedcontent id="upgradedesktop" runat="server">
    <w:Tab  title="Overview" isdefault="true" runat="server">
        <TabContent>
            your html tags and server side tags here
        </TabContent>
    </w:Tab>
    <w:tab title="Benefits" runat="server" >
        <tabcontent>
            your html tags and server side tags here
        </tabcontent>
    </w:tab>
    <w:tab title="Products" runat="server">
        <tabcontent>
            your html tags and server side tags here
        </tabcontent>
    </w:tab>
</kitt:tabbedcontent>

What you're looking for is called a "templated control." You can find more information on MSDN.