I have an IEnumerable
, which is \"streamed\" per yield
statements from a method. Now I want to convert this enumerable to a Str
I think you can use it in this first convert your string to byte array and use memory stram afterwards
string sourceFile = System.Web.HttpContext.Current.Server.MapPath(Path.Combine("/", "yourAddress"));
byte[] byteArray = System.IO.File.ReadAllBytes(sourceFile);
MemoryStream mem;
using (mem = new MemoryStream())
{
mem.Write(byteArray, 0, (int)byteArray.Length);
return mem;
}
You have to create your ActionResult class to achieve lazy evaluation. You have create mix of ContentResult
an FileStreamResult
classes to achieve behaviour like FileStreamResult with ability to set result encoding. Good starting point is FileResult
abstract class:
public class EnumerableStreamResult : FileResult
{
public IEnumerable<string> Enumerable
{
get;
private set;
}
public Encoding ContentEncoding
{
get;
set;
}
public EnumerableStreamResult(IEnumerable<string> enumerable, string contentType)
: base(contentType)
{
if (enumerable == null)
{
throw new ArgumentNullException("enumerable");
}
this.Enumerable = enumerable;
}
protected override void WriteFile(HttpResponseBase response)
{
Stream outputStream = response.OutputStream;
if (this.ContentEncoding != null)
{
response.ContentEncoding = this.ContentEncoding;
}
if (this.Enumerable != null)
{
foreach (var item in Enumerable)
{
//do your stuff here
response.Write(item);
}
}
}
}