Datalist & usercontrol ?????

phucuong273

Please tell me how adding some dynamic usercontrols into datalist ( I am a newcomer to ASP.NET ).Thanks a lot.

minhpc_bk

You can create an event handler for the ItemCreated event of the DataList control, in the handler you can use the LoadControl method to dynamically load your user control, then add it to a container placed the item template. You can read more about this in MSDN: How to: Create Instances of ASP.NET User Controls Programmatically [^] DataList Web Server Control [^]

phucuong273

can you explain clearly & demo code for me ( i'm a beginner ), i still don't understand what your mean :confused:

minhpc_bk

Below is a quick example to demonstrate what I am getting at:

<%@ Page Language="C#" %>

protected void Page\_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataList1.DataSource = GetSimpleDataSource();
        DataList1.DataBind();
    }
}
         
private ArrayList GetSimpleDataSource()
{
    ArrayList list = new ArrayList();
    list.Add(new object());
    list.Add(new object());
    list.Add(new object());

    return list;
}
           
protected void DataList1\_ItemCreated(object sender, DataListItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || 
                e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Control userControl = LoadControl("SimpleControl.ascx");
        PlaceHolder container = e.Item.FindControl("PlaceHolder1") as PlaceHolder;
        container.Controls.Add(userControl);
    }
}

</script>

<html>
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DataList ID="DataList1" runat="server" OnItemCreated="DataList1_ItemCreated">
<ItemTemplate>
<asp:PlaceHolder runat="server" ID="PlaceHolder1"></asp:PlaceHolder>
<br />
</ItemTemplate>
</asp:DataList>
</div>
</form>
</body>
</html>

------------SimpleControl.ascx-----------
<%@ Control Language="C#" ClassName="SimpleControl" %>
<h3>This is a simple user control</h3>

yesimlucky

drag drop them Regards. Sudhakar D P

phucuong273

thanks a lot , minhpc_bk ! :)

phucuong273

I save a lot of time with your help. Can you help me paging this datalist above ( + demo code ):) phucuong

minhpc_bk

By design, the DataList control does not support the paging functionality, if you want that, you need to provide your sample code to implement the custom paging. There are a couple of options which you can use, and you can see the sample code from here[^]. If you want to use the built-in paging functionality, you may consider using another control like DataGrid, or GridView(in the ASP.NET 2).