using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Mvc;
namespace Teknik.Utilities
{
///
/// MVC action result that generates the file content using a delegate that writes the content directly to the output stream.
///
public class FileGenerateResult : FileResult
{
private readonly Action responseDelegate;
private readonly bool bufferOutput;
///
/// Initializes a new instance of the class.
///
/// Name of the file.
/// Type of the content.
/// Delegate with Stream parameter. This is the stream to which content should be written.
/// use output buffering. Set to false for large files to prevent OutOfMemoryException.
public FileGenerateResult(string fileName, string contentType, Action response, bool bufferOutput)
: base(contentType)
{
if (response == null)
throw new ArgumentNullException("content");
this.responseDelegate = response;
this.bufferOutput = bufferOutput;
}
///
/// Writes the file to the response.
///
/// The response object.
protected override void WriteFile(System.Web.HttpResponseBase response)
{
response.Buffer = bufferOutput;
response.BufferOutput = bufferOutput;
responseDelegate(response);
}
}
}