I am uploading files by using HTML File Upload control and passing data to ASP.NET Web API. Everything is working fine when I upload image or any text file or xml file. but it's giving error while I upload media files (mp3, mp4).
My code is,
string path = "//My path";
MultipartFormDataStreamProvider provider = new MultipartFormDataStreamProvider(path);
var task = Request.Content.ReadAsMultipartAsync(provider);
return await task.ContinueWith<bool>(t =>
{
string originalSavedAt = "";
foreach (MultipartFileData file in provider.FileData)
{
originalSavedAt = file.LocalFileName;
}
return true;
}, TaskScheduler.FromCurrentSynchronizationContext());
In above code, When I upload image file, it show me values in provider. FileData (provider.FileData.count is 1) in foreach loop.
But it is null (provider.FileData.count is 0) when I upload media file.
Status is failure in task lembda expression during media file upload, but status is RanToCompletion during image upload.
Do I need to add anything for media files. ?
Related
I am developing an application for Android using Xamarin.
I have created a JsonData folder in the Android project and created a Setting.json file.
\MyApp\MyApp.Android\JsonData\Setting.json
In the properties, we set the Copy when new.
The following folders in the local environment contain the files.
\MyApp\MyApp.Android\bin\Debug\JsonData\Setting.json
I want to load this file in the actual Android device.
When I do this, it tells me that the file is missing.
Could not find a part of the path "/JsonData/Setting.json."
Try
{
var text = File.ReadAllText("JsonData/Setting.json", Encoding.UTF8);
var setting = JsonConvert.DeserializeObject<Setting>(text);
}
catch(Exception exception)
{
var error = exception.Message;
}
What is the path of the file in Android?
I think you're using File Handling in Xamarin.Forms incorrectly.
From the parameter of function File.ReadAllText, the app will access the file system to getSetting.json from folder JsonData in your android device.
The path of the file on each platform can be determined from a .NET Standard library by using a value of the Environment.SpecialFolder enumeration as the first argument to the Environment.GetFolderPath method. This can then be combined with a filename with the Path.Combine method:
string fileName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "temp.txt");
And you can read the file by code:
string text = File.ReadAllText(fileName);
In addition, from your code,I guess you want to Load your Embedded file( Setting.json) as Resources,right?
In this case,we should make sure the Build Action of your Setting.json is Embedded Resource.
And GetManifestResourceStream is used to access the embedded file using its Resource ID.
You can refer to the following code:
var assembly = IntrospectionExtensions.GetTypeInfo(typeof(LoadResourceText)).Assembly;
Stream stream = assembly.GetManifestResourceStream("YourAppName.JsonData.Setting.json");
string text = "";
using (var reader = new System.IO.StreamReader (stream))
{
text = reader.ReadToEnd ();
}
For more , you can check document : File Handling in Xamarin.Forms.
And you can also check the sample code here: https://learn.microsoft.com/en-us/samples/xamarin/xamarin-forms-samples/workingwithfiles/ .
I am working on Xamarin.Forms-UWP.
I want to convert byte array stored in the database to pdf for Windows phone.
I know how to convert
var base64Binarystr = "ABCDS"
byte[] bytes = Convert.FromBase64String(base64Binarystr );
Can anyone help as how to display pdf? Just a pointer- I have multiple pdf files so I cannot add all the files to the application or store on the disk.
Appreciate for any pointers on this.
Thanks!
Every received file can be stored with the same name (I used "my.pdf") then there is no risk for too many files stored. If you need to cache files then you can give different names. The pdf viewer didn't want to show files from Local, Temp or Downloads folder for me though I tried ms-appdata, so I had to move the file from Local folder to Assets to display the way viewer "wants" it via ms-appx-web. Downloads folder also has a problem with CreationCollisionOption.ReplaceExisting, it says invalid parameter if file already exists instead of replacing it but Local and Temporary folder behave correctly.
/////////////// store pdf file from internet, move it to Assets folder and display ////////////////////
//bytes received from Internet. Simulated that by reading existing file from Assets folder
var pdfBytes = File.ReadAllBytes(#"Assets\Content\samplepdf.pdf");
try
{
StorageFolder storageFolder = ApplicationData.Current.LocalFolder; //or ApplicationData.Current.TemporaryFolder
StorageFile pdfFile = await storageFolder.CreateFileAsync("my.pdf", CreationCollisionOption.ReplaceExisting);
//write data to created file
await FileIO.WriteBytesAsync(pdfFile, pdfBytes);
//get asets folder
StorageFolder appInstalledFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
StorageFolder assetsFolder = await appInstalledFolder.GetFolderAsync("Assets");
//move file from local folder to assets
await pdfFile.MoveAsync(assetsFolder, "my.pdf", NameCollisionOption.ReplaceExisting);
}
catch (Exception ex)
{
}
Control.Source = new Uri(string.Format("ms-appx-web:///Assets/pdfjs/web/viewer.html?file={0}", "ms-appx-web:///Assets/my.pdf")); //local pdf
How do I upload a file to an Acumatica Screen through HTTP virtual path?
For example, I would like to upload mysite.com/files/abc.pdf to the Sales orders screen.
Below is a code snippet to achieve your goal.It is reading file from HTTP URL and attaching it to one of the existing Case.
//Graph for file management
PX.SM.UploadFileMaintenance filegraph = PXGraph.CreateInstance<PX.SM.UploadFileMaintenance>();
//Since you need file from HTTP URL - below is a sample
WebRequest request = WebRequest.Create("http://www.pdf995.com/samples/pdf.pdf");
using (System.IO.Stream dataStream = request.GetResponse().GetResponseStream())
{
using (System.IO.MemoryStream mStream = new System.IO.MemoryStream())
{
dataStream.CopyTo(mStream);
byte[] data = mStream.ToArray();
//Create file info, you may check different overloads as per your need
PX.SM.FileInfo fileinfo = new PX.SM.FileInfo("case.pdf", null, data);
if (filegraph.SaveFile(fileinfo))
{
if (fileinfo.UID.HasValue)
{
// To attach the file to case screen - example
CRCaseMaint graphCase = PXGraph.CreateInstance<CRCaseMaint>();
//Locate existing case
graphCase.Case.Current = graphCase.Case.Search<CRCase.caseCD>("<Case to which you want to attach file>");
//To Attach file
PXNoteAttribute.SetFileNotes(graphCase.Case.Cache, graphCase.Case.Current, fileinfo.UID.Value);
//To Attach note
PXNoteAttribute.SetNote(graphCase.Case.Cache, graphCase.Case.Current, "<Note you wish to specify>");
//Save case
graphCase.Save.Press();
}
}
}
}
I'm trying to upload a large file to a document library, but it fails after just a few seconds. The upload single document fails silently, upload multiple just shows a failed message. I've turned up the file size limit on the web application to 500MB, and the IIS request length to the same (from this blog), and increased the IIS timeout for good measure. Are there any other size caps that I've missed?
Update I've tried a few files of various sizes, anything 50MB or over fails, so I assume something somewhere is still set to the webapp default.
Update 2 Just tried uploading using the following powershell:
$web = Get-SPWeb http://{site address}
$folder = $web.GetFolder("Site Documents")
$file = Get-Item "C:\mydoc.txt" // ~ 150MB
$folder.Files.Add("SiteDocuments/mydoc.txt", $file.OpenRead(), $false)
and get this exception:
Exception calling "Add" with "3" argument(s): "<nativehr>0x80070003</nativehr><nativestack></nativestack>There is no file with URL 'http://{site address}/SiteDocuments/mydoc.txt' in this Web."
which strikes me as odd as of course the file wouldn't exist until it's been uploaded? N.B. while the document library has the name Site Documents, it has the URL SiteDocuments. Not sure why...
Are you sure you updated the right webapp? Is the filetype blocked by the server? Is there adequate space in your content database? I would check ULS logs after that and see if there is another error since it seems you hit the 3 spots you would need too update.
for uploading a large file, you can use the PUT method instead of using the other ways to upload a document.
by using a put method you will save the file into content database directly. see the example below
Note: the disadvantage of the code below is you cannot catch the object that is responsible for uploading directly, on other word, you cannot update the additional custom properties of the uploaded document directly.
public static bool UploadFileToDocumentLibrary(string sourceFilePath, string targetDocumentLibraryPath)
{
//Flag to indicate whether file was uploaded successfuly or not
bool isUploaded = true;
try
{
// Create a PUT Web request to upload the file.
WebRequest request = WebRequest.Create(targetDocumentLibraryPath);
//Set credentials of the current security context
request.Credentials = CredentialCache.DefaultCredentials;
request.Method = “PUT”;
// Create buffer to transfer file
byte[] fileBuffer = new byte[1024];
// Write the contents of the local file to the request stream.
using (Stream stream = request.GetRequestStream())
{
//Load the content from local file to stream
using (FileStream fsWorkbook = File.Open(sourceFilePath, FileMode.Open, FileAccess.Read))
{
//Get the start point
int startBuffer = fsWorkbook.Read(fileBuffer, 0, fileBuffer.Length);
for (int i = startBuffer; i > 0; i = fsWorkbook.Read(fileBuffer, 0, fileBuffer.Length))
{
stream.Write(fileBuffer, 0, i);
}
}
}
// Perform the PUT request
WebResponse response = request.GetResponse();
//Close response
response.Close();
}
catch (Exception ex)
{
//Set the flag to indiacte failure in uploading
isUploaded = false;
}
//Return the final upload status
return isUploaded;
}
and here are an example of calling this method
UploadFileToDocumentLibrary(#”C:\test.txt”, #”http://home-vs/Shared Documents/textfile.pdf”);
I am trying to create a upload servlet that handles enctype="multipart/form-data" from a form. The file I am trying to upload is a zip. However, I can upload and read the file on localhost, but when I upload to the server, I get a "File not found" error when I want to upload a file. Is this due to the Struts framework that I am using? Thanks for your help. Here is part of my code, I am using FileUpload from http://commons.apache.org/fileupload/using.html
I have changed to using ZipInputStream, however, how to I reference to the ZipFile zip without using a local disk address (ie: C://zipfile.zip). zip is null because its not instantiated. I will need to unzip and read the zipentry in memory, without writing to the server.
For the upload servlet:
>
private ZipFile zip;
private CSVReader reader;
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if(isMultipart){
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List <FileItem> items = upload.parseRequest(request);
Iterator iter = items.iterator();
while (iter.hasNext()) {
//Iterating through the uploaded zip file and reading the content
FileItem item = (FileItem) iter.next();
ZipInputStream input = new ZipInputStream(item.getInputStream());
ZipEntry entry = null;
while (( entry= input.getNextEntry()) != null) {
ZipEntry entry = (ZipEntry) e.nextElement();
if(entry.getName().toString().equals("file.csv")){
//unzip(entry)
}
}
}
public static void unzip(ZipEntry entry){
try{
InputStream inputStream = **zip**.getInputStream(entry);
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
reader = new CSVReader(inputStreamReader);
}
catch(Exception e){
e.printStackTrace();
}
}
<
Here,
zip = new ZipFile(new File(fileName));
You're assuming that the local disk file system at the server machine already contains the file with exactly the same name as it is at the client side. This is a wrong assumption. That it worked at localhost is obviously because both the webbrowser and webserver "by coincidence" runs at physically the same machine with the same disk file system.
Also, you seem to be using Internet Explorer as browser which incorrectly includes the full path in the filename like C:/full/path/to/file.ext. You shouldn't be relying on this browser specific bug. Other browsers like Firefox correctly sends only the file name like file.ext, which in turn would have caused a failure with new File(fileName) (which should have helped you to spot your mistake much sooner).
To fix this "problem", you need to obtain the file contents as InputStream by item.getInputStream():
ZipInputStream input = new ZipInputStream(item.getInputStream());
// ...
Or to write it to disk by item.write(file) and reference it in ZipFile:
File file = File.createTempFile("temp", ".zip");
item.write(file);
ZipFile zipFile = new ZipFile(file);
// ...
Note: don't forget to check the file extension beforehand, else this may choke.