Number of items in result in ASP repeater with Sitecore - asp.net

Question

I'm working with Sitecore ascx file, and got something like this:
<asp:Repeater ID="NavRepeater" runat="server">
<ItemTemplate>
<div class="item">
<img src="<%# ((Sitecore.Data.Items.Item)Container.DataItem).Fields["Image Url"] %>" width="360" height="420" alt="">
</div>
</ItemTemplate>
<SeparatorTemplate></SeparatorTemplate>
</asp:Repeater>
Can't figure out, how to get total number of elements from Sitecore.Data.Items.Item.
I was also wondering how to retrieve given item in collection - like item no 2 ?

Answer 1

It's on the data source of your repeater in C#:
So if your C# is:
NavRepeater.DataSource = someData;
Then the length is someData.Length or someData.Count() based on its type.
For getting a specific item at a location:
Item second = someData[1]; // per 0-indexing
Or based on type, can also be:
Item second = someData.ElementAt(1) // per 0-indexing

Answer 2

You can have something like :
<asp:Repeater ID="NavRepeater" runat="server" OnItemDataBound="rptGallery_ItemDataBound">
<ItemTemplate>
<div class="item">
<sc:fieldrenderer id="fldGalleryItemImageThumbnail" runat="server" fieldname="ImageUrl" disablewebediting="true" />
</div>
</ItemTemplate>
<SeparatorTemplate></SeparatorTemplate>
</asp:Repeater>
On Page_Load you will have:
protected void Page_Load(object sender, EventArgs e)
{
rptGallery.DataSource = listofitemyyouwanttoshow;
rptGallery.DataBind();
}
On rptGallery_ItemDataBound event you will have:
protected void rptGallery_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
Item item = (Item)e.Item.DataItem;
//you can check index here of item
if (item != null)
{
var fldGalleryItemImageThumbnail = e.Item.FindControl("fldGalleryItemImageThumbnail") as FieldRenderer;
if (fldGalleryItemImageThumbnail != null)
{
fldGalleryItemImageThumbnail.DataSource = item.ID.ToString();
fldGalleryItemImageThumbnail.Parameters = String.Format("width={0}", 360);
}
}
}
}
}
I hope it helps you .

Answer 3

You would get these from the enumerable that you are binding you repeater to.