Is it possible to databind using an anonymous type?

I think that's the right terminology...

Basically, I have a repeater control, and a Linq query that retrieves some items. Ordinarily I would databind straight to the query and use Eval to populate the template with the results.

However, it doesn't come through in quite the right format - for example, if EndDate is null (it's a DateTime?) then I want to substitute开发者_运维技巧 it with "Present". I am using only a couple of the properties in the query result objects.

I am wondering if there's a solution like:

[pseudo madeup code]
var query = getResults();

List<anonymous> anonList = new List();

foreach (var q in query)
{
   string myEndDate = "";
   if (q.EndDate.HasValue) 
       { myEndDate = q.EndDate.ToString(); }
   else 
       { myEndDate = "Present"; }

   anonList.items.add(new { name=q.name, enddate=myEndDate };
}

repeater.Datasource = anonList;

then

<div><%#Eval("enddate")%></div>

You have two options for declaring you result list:

1. Use a non-generic ArrayList, or
2. Use Enumerable.Repeat, ie. var anonList = Enumerable.Repeat(new { name="", enddate=""}, 0).ToList();

Yes, you can bind against anonymous types but your code to generate the sequence of those types will have to change a bit:

repeater.DataSource
    = getResults()
        .Select(q => new {
            name = q.name,
            enddate = (q.EndDate.HasValue) 
                        ? q.EndDate.ToString() 
                        : "Present"
        });

You could take Andrews sample:

repeater.DataSource    = getResults()
    .Select(q => new {
        name = q.name,
        enddate = (q.EndDate.HasValue)
                     ? q.EndDate.ToString()
                     : "Present"        });

but instead of computing the enddate inline, you call a function:

repeater.DataSource = getResults()
    .Select(q => new {
        name = q.name,
        enddate = GetEndDate(q)});


    private void GetEndDate(TypeOfQ q)
    {
       return (q.EndDate.HasValue) ? q.EndDate.ToString() : "Present";
    }

Is that what you ment??

regards, Chris