Sitecore: Get value of droplink in repeater - sitecore

Question

I have the following;
<asp:Repeater runat="server" ID="Repeater">
<ItemTemplate>
<sc:image field="image from droplink" Item='<%# Container.DataItem %>' runat="server" />
</ItemTemplate>
"Image from droplink" is a droplink selected value (a Sitecore content item). Within this item, there is a field "Image" which is the actual media item i want the source of. So the above does not work, as this field just returns the GUID of the content item.
How do I get the image src from the Image field of the droplink selected item in the above repeater?

Answer 1

You'll need to populate the Item or Datasource property on the sc:Image tag with the actual item containing the Image field. Item would be an Item object, whereas Datasource can be an ID or path. I think the following should do it.
<sc:Image runat="server" Field="image field" Datasource="<%# ((Item)Container.DataItem)["droplink field"] %>" />

Answer 2

The following answer assumes that the droplink on the Context Item points to a Media Item. (Prior to questioner clarification). Might be useful for someone else.
You'll need to use an asp:Image and a OnItemDataBound handler in your code behind, and use e.Item.DataItem (where e is RepeaterItemEventArgs) to get the item being bound. Ensure e.ItemType is a ListItemType.Item. From there it will be something like...
var item = (Item)e.Item.DataItem;
var dropLink = new InternalLinkField(item.Fields["image from droplink"]);
var mediaItem = dropLink.TargetItem;
if (mediaItem != null)
{
var options = new MediaOptions { Height = 100, Width = 100 }; //change to your dimensions
var imageUrl = MediaManager.GetMediaUrl(new MediaItem(mediaItem), options);
var imageControl = e.Item.FindControl("myImageControlID"); //change to asp:Image ID
imageControl.ImageUrl = imageUrl;
imageControl.AlternateText = mediaItem.Alt;
}
If you are supporting Page Editor (I hope you are!), within a repeater you can use Edit Frames to allow editing of the image on each item. (Note that the linked example puts an edit frame around a whole ListView, whereas you'll want to place it within your Repeater and databind the Datasource property to the current item ID.)