L'obtention du Ruisseau de ne pas le support de l'écriture.' Exception dans le code suivant

Je suis en train de télécharger une image sur Amazon S3, mais avant que je suis le redimensionnement de l'image. Pour le redimensionnement, j'ai passer les objets de flux et à un moment donné (ligne, a fait le commentaire //Erreur), je suis du Ruisseau de ne pas le support de l'écriture.' Exception à la règle. S'il vous plaît aider.

 public ActionResult AddPost(AddPost post)
{
Guid guid = new Guid();
AccountController ac=new AccountController();
string randomId = guid.ToString();
PutAttributesRequest putAttributesAction = new PutAttributesRequest().WithDomainName("ThisIsMyEXDomainPosts").WithItemName(randomId);
List<ReplaceableAttribute> attrib = putAttributesAction.Attribute;
System.IO.Stream stream;
System.IO.StreamReader sr = new System.IO.StreamReader(post.imageFileAddress.ToString());
sr.ReadToEnd();
stream = sr.BaseStream;
Amazon.S3.Model.PutObjectRequest putObjectRequest = new Amazon.S3.Model.PutObjectRequest();
System.Drawing.Image img = System.Drawing.Image.FromStream(stream);
System.Drawing.Image imgResized = ResizeImage(img, 640, 800);
System.IO.MemoryStream mstream = new System.IO.MemoryStream();
imgResized.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg);
mstream.WriteTo(stream);//Error
putObjectRequest.WithBucketName("TIMEXImages");
putObjectRequest.CannedACL = Amazon.S3.Model.S3CannedACL.PublicRead;
putObjectRequest.Key = randomId + "_0.jpg";
putObjectRequest.InputStream = stream;
Amazon.S3.Model.S3Response s3Response = as3c.PutObject(putObjectRequest);
s3Response.Dispose();
//Uploadig the Thumb
System.Drawing.Image imgThumb = ResizeImage(img, 80, 100);
imgThumb.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg);
mstream.WriteTo(stream);
putObjectRequest.WithBucketName("MyProjectImages");
putObjectRequest.CannedACL = Amazon.S3.Model.S3CannedACL.PublicRead;
putObjectRequest.Key = randomId + ".jpg";
putObjectRequest.InputStream = stream;
Amazon.S3.Model.S3Response s3Response2 = as3c.PutObject(putObjectRequest);
s3Response2.Dispose();
//Closing all opened streams
sr.Close();
stream.Close();
mstream.Close();
//Adding to SimpleDB
attrib.Add(new ReplaceableAttribute().WithName("category").WithValue(post.category));
attrib.Add(new ReplaceableAttribute().WithName("description").WithValue(post.description));
attrib.Add(new ReplaceableAttribute().WithName("favoriteCount").WithValue("0"));
attrib.Add(new ReplaceableAttribute().WithName("imageThug").WithValue(randomId));
attrib.Add(new ReplaceableAttribute().WithName("title").WithValue(post.title));
attrib.Add(new ReplaceableAttribute().WithName("userId").WithValue(ac.GetLoggedInUserId()));
sdb.PutAttributes(putAttributesAction);
return View();
}

OriginalL'auteur Umair Khan Jadoon | 2011-08-30