FileUpload Fails when trying to upload

hi..

i m using silverligh appl. In that i need to upload files.
for uploading files i used handler file and passing the stream values to handler file in order to perform upload operation.

now when i try to upload greater than 5MB file then the upload fails.
and it throws the error "Invalid length for a Base-64 char array".

during uploading it come about 94% uploading and after that it throws the above error and the upload fails.

my handler file code is below:
public void ProcessRequest(HttpContext context)
{

try
{
context.Response.ContentType = "text/plain";
string check = context.Request["filestream"];

check = Regex.Replace(check, " ", "+");
byte[] bytes = Convert.FromBase64String(check);
string fileName = context.Server.MapPath("Uploads\\" + context.Request["filename"]);
context.Request["foldername"] + context.Request["filename"]);

FileStream fs;
if (!File.Exists(fileName))
fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write);
else
fs = new FileStream(fileName, FileMode.Append);
fs.Write(bytes, 0, bytes.Length);
fs.Close();
fs.Dispose();
}
catch (Exception ex)
{
clsExHandler.Instance.Write(ex);

try
{
clsExHandler.Instance.Write("full Url: " + context.Request.Params.ToString() );
foreach (string ss in context.Request.ServerVariables.GetValues("QUERY_STRING"))
clsExHandler.Instance.Write("get url:" + ss.ToString());
}
catch (Exception)
{
}

}
}

-----------------

my silverlight code is below:
byte[] b = new byte[57344];
//byte[] b = new byte[1153433];

int bytesRead = fs.Read(b, 0, b.Length);
long bytesReadTotal = bytesRead;
while (bytesRead > 0)
{
// has request to stop early been made?
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}

AutoResetEvent a = new AutoResetEvent(false);

WebClient wc = new WebClient();
wc.Headers["Content-Type"] = "application/x-www-form-urlencoded";
string errormessage = "";
wc.UploadStringCompleted += (s, e1) =>
{
string result = "";
if (e1.Error == null)
result = e1.Result;
else
{
errormessage = e1.Error.Message.ToString();
//MessageBox.Show(errormessage);
e.Cancel = true; // set worker.CancellationPending
}
a.Set();
};

wc.UploadStringAsync(new Uri("/Uploader.ashx", UriKind.RelativeOrAbsolute), "POST"
, "foldername=" + "&filename=" + fileName + "&filestream="
+ Convert.ToBase64String(b, 0, bytesRead));

a.WaitOne();

int percentComplete = (int)((float)bytesReadTotal / (float)fs.Length * 100);
worker.ReportProgress(percentComplete, (Object)bytesReadTotal);
if (worker.CancellationPending)
{
e.Cancel = true;
break; // request is stopping
}
if (bytesReadTotal > 1048576 && b.Length != 1153433)
{
b = new byte[1153433];
}
bytesRead = fs.Read(b, 0, b.Length);
bytesReadTotal += bytesRead;

--------------

how to handle this issue..

need ur suggestions..

Note:
i have already set the clientmaxreq.length to maximum value. but still we cannot upload >5MB file
regards
gopal.s

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Jignesh Trivedi13y ago
hi,
By default, Asp.net can be upload file which has size is less than or equal to 4MB.
you may increase this size by setting up web config.
System.Web>
// size in kb and allow us to upload file up to 10 MB

hope this will help you.
0
Sanjeeb Lenka13y ago
check this link

http://zombiebob.blogspot.in/2010/08/large-file-upload-in-silverlight.html
0
Pankaj Pandey13y ago
go to ur web.config file and add this.
```
         maxAllowedContentLength="104857600"/>    

try it
```
0

FileUpload Fails when trying to upload > 5MB files