IArchive archive = null;
IReader reader = null;
archive = SevenZipArchive.Open(fileStream, Options.LookForHeader);
reader = archive.ExtractAllEntries();
while (reader.MoveToNextEntry())
{
if (!reader.Entry.IsDirectory)
{
Stream _redaer = new MemoryStream();
reader.WriteEntryTo(_redaer);
fileName = reader.Entry.FilePath;
int index = fileName.LastIndexOf("/");
string file = fileName.Substring(index + 1, (fileName.Length - (index + 1)));
using (binaryReader = new BinaryReader(_redaer, encoding))
{
long fileLength = _redaer.Length;
MemoryStream ms = new MemoryStream();
_redaer.Position = 0;
_redaer.CopyTo(ms);
byte[] buteArray = ms.ToArray();
SaveToIsoStore(fileName, buteArray);
}
}
}
This code gives exception of type SharpCompress.Common.InvalidFormatException,Please provide the solution in wp7.
Related
I am trying to convert a PDF page to an image, to create thumbnails. This is the code that I am using:
PdfRenderer pdfRenderer = new PdfRenderer(GetSeekableFileDescriptor(filePath));
var appDirectory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
string fileName = System.IO.Path.GetFileNameWithoutExtension(filePath);
string directoryPath = System.IO.Path.Combine(appDirectory, "thumbnailsTemp", System.IO.Path.GetFileNameWithoutExtension(fileName));
if (!Directory.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
int pageCount = pdfRenderer.PageCount;
for (int i = 0; i < pageCount; i++)
{
Page page = pdfRenderer.OpenPage(i);
Android.Graphics.Bitmap bmp = Android.Graphics.Bitmap.CreateBitmap(page.Width, page.Height, Android.Graphics.Bitmap.Config.Rgb565 or Argb8888);
page.Render(bmp, null, null, PdfRenderMode.ForDisplay);
try
{
using (FileStream output = new FileStream(System.IO.Path.Combine(directoryPath, fileName + "Thumbnails" + i + ".png"), FileMode.Create))
{
bmp.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 100, output);
}
page.Close();
}
catch (Exception ex)
{
//TODO -- GERER CETTE EXPEXPTION
throw new Exception();
}
}
return directoryPath;
}
I tried with ARGB 8888 and that was a success. But the rendering time was too slow for big PDF files. This is why I tried to improve it by changing the format to RGB 565. But my app is crashing with this Execption:
Unsuported pixel format
Any idea to fix this, or how to render a PDF to a bitmap faster? I was looking on google but didn't find a solution related to my code.
UPDATE
I did this but know, my app is crashing at this line of code :
await Task.Run(() =>
{
bytes = page.AsPNG(72);
});
My class :
public async Task<string> GetBitmaps(string filePath)
{
//TODO -- WORK ON THIS
PdfRenderer pdfRenderer = new PdfRenderer(GetSeekableFileDescriptor(filePath));
var appDirectory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
string fileName = System.IO.Path.GetFileNameWithoutExtension(filePath);
string directoryPath = System.IO.Path.Combine(appDirectory, "thumbnailsTemp", System.IO.Path.GetFileNameWithoutExtension(fileName));
var stream = new MemoryStream();
using (Stream resourceStream = new FileStream(filePath, FileMode.Open))
{
resourceStream.CopyTo(stream);
}
for (int i = 0; i < pdfRenderer.PageCount; i++)
{
TallComponents.PDF.Rasterizer.Page page = new TallComponents.PDF.Rasterizer.Page(stream, i);
byte[] bytes = null;
await Task.Run(() =>
{
bytes = page.AsPNG(72);
});
using (FileStream output = new FileStream(System.IO.Path.Combine(directoryPath, fileName + "Thumbnails" + i + ".png"), FileMode.Create, FileAccess.Write))
{
output.Write(bytes, 0, bytes.Length);
}
}
return directoryPath;
}
you could draw a PDF page in app by converting a PDF page to a bitmap,here the PDF document itself is embedded as a resource.
var assembly = Assembly.GetExecutingAssembly();
var stream = new MemoryStream();
using (Stream resourceStream = assembly.GetManifestResourceStream("DrawPdf.Android.tiger.pdf"))
{
resourceStream.CopyTo(stream);
}
Page page = new Page(stream, 0);
// render PDF Page object to a Bitmap
byte[] bytes = null;
await Task.Run(() =>
{
bytes = page.AsPNG(72);
});
Bitmap bmp = global::Android.Graphics.BitmapFactory.DecodeByteArray(bytes, 0, bytes.Length);
i use ionic.zip gzipstream compress and decompress byte[],
it can compress well,but when it decompressed from byte[] compressed it told
Bad state (invalid stored block lengths)
my codes bellow
Trace.WriteLine(s.Length);
var b = Encoding.UTF8.GetBytes(s);
Trace.WriteLine(b.Length);
byte[] b2;
var sw = new Stopwatch();
sw.Start();
using (var m = new MemoryStream())
{
var stream = new GZipStream(m, CompressionMode.Compress,true);
stream.Write(b,0,b.Length);
stream.Flush();
b2 = m.GetBuffer();
stream.Close();
sw.Stop();
Trace.WriteLine(sw.ElapsedMilliseconds);
Trace.WriteLine(b2.Length);
}
using (var m2 = new MemoryStream())
{
m2.Write(b2,0,b2.Length);
m2.Position = 0;
var stream = new GZipStream(m2,CompressionMode.Decompress,true);
var m3 = new MemoryStream();
var buffer = new byte[1024];
var n = 1;
while (n != 0)
{
n = stream.Read(buffer, 0, buffer.Length);
if (n > 0)
{
m3.Write(buffer,0,n);
}
}
var b3 = m3.GetBuffer();
Trace.WriteLine(b3);
}
the decompress code is what the document said.here
and i found no other docs ,
what should i do when decompress?
Ah~~~, it's so fool.
there are byte[] compress and decompress methods.
GZipStream.CompressBuffer() and GZipStream.UncompressBuffer()
Good afternoon everyone.
I'm trying to download a few files from a FTP server and I don't know why this isn't working, because the same code worked before. Now when i run the service I get the following error:
Error 1053: The service did not respond to the start or control request in a timely fashion
I've tried doing other Methods like GetFileSize or even the DeleteFile that it's suppose to execute after the DownloadFile and they work, but this one isn't and i can't figure out why. Any ideas? My code is below, many thanks!
FtpWebRequest reqFTP;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(server + file));
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.KeepAlive = true;
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Proxy = null;
reqFTP.UsePassive = false;
reqFTP.Timeout = -1;
FtpWebResponse response2 = (FtpWebResponse)reqFTP.GetResponse();
Stream responseStream2 = response2.GetResponseStream();
FileStream writeStream = new FileStream(folder + file, FileMode.Create);
int Length = 2048;
Byte[] buffer = new Byte[Length];
int bytesRead = responseStream2.Read(buffer, 0, Length);
while (bytesRead > 0)
{
writeStream.Write(buffer, 0, bytesRead);
bytesRead = responseStream2.Read(buffer, 0, Length);
}
writeStream.Close();
response2.Close();
try
{
string uri2 = server + file;
Uri serverUri2 = new Uri(uri);
if (serverUri2.Scheme != Uri.UriSchemeFtp)
{
return;
}
FtpWebRequest reqFTP2;
reqFTP2 = (FtpWebRequest)FtpWebRequest.Create(new Uri(server + file));
reqFTP2.Credentials = new NetworkCredential(username, password);
reqFTP2.KeepAlive = false;
reqFTP2.Method = WebRequestMethods.Ftp.DeleteFile;
reqFTP2.UseBinary = true;
reqFTP2.Proxy = null;
reqFTP2.UsePassive = false;
FtpWebResponse response3 = (FtpWebResponse)reqFTP2.GetResponse();
Stream responseStream3 = response3.GetResponseStream();
response3.Close();
}
i get the stream from webSite ,then put it in isolatedStorage into IsolatedstorageStream ,
but it don't work ,no error no sound , what's wrong ????
HttpWebResponse reponse = request.EndGetResponse(result) as HttpWebResponse;
if (reponse.StatusCode == HttpStatusCode.OK)
{
Stream stream=reponse.GetResponseStream();
SaveMusic(stream, "music");
ReadMusic("music");
Deployment.Current.Dispatcher.BeginInvoke(
() =>
{
me.AutoPlay = true;
me.Volume = 100;
me.SetSource(songStream);
me.Play();
});
}
ok thanks keyboardP for your help ;here is my code
protected void SaveMusic(Stream stream,string name)
{
IsolatedStorageFile fileStorage = IsolatedStorageFile.GetUserStoreForApplication();
if (!fileStorage.DirectoryExists("Source/Music"))
{
fileStorage.CreateDirectory("Source/Music");
}
using (IsolatedStorageFileStream fileStream = IsolatedStorageFile.GetUserStoreForApplication().OpenFile("Source\\Music\\" + name + ".mp3", FileMode.Create))
{
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
fileStream.Write(bytes, 0, bytes.Length);
fileStream.Flush();
}
}
protected void ReadMusic(string name)
{
using (IsolatedStorageFile fileStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
songStream = null;
songStream = new IsolatedStorageFileStream("Source\\Music\\" + name + ".mp3", FileMode.Open, fileStorage);
}
}
Assuming your saving and reading code is correct, your stream's position might be at the end. Try adding
songStream.Position = 0;
before SetSource(songStream);
Try using this to save the file:
using (var fileStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
var buffer = new byte[1024];
using (var myIsStream = fileStorage.OpenFile("Source\\Music\\" + name + ".mp3", FileMode.CreateNew))
{
int bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, 1024)) > 0)
myIsStream.Write(buffer, 0, bytesRead);
}
}
The below code which uses npoi to create excel documents displays images in open office calc but not in excel.
If i open the doc in calc and save the document and then open the document in excel i can then see the images in excel.
Here is the code.
public static byte[] CreateExcel(CampaignViewModel viewModel, string fileName)
{
byte[] output;
using (FileStream fs = new FileStream(HttpContext.Current.Server.MapPath(#"\Data\templates\NPOITemplate.xls"), FileMode.Open, FileAccess.ReadWrite))
{
var templateWorkbook = new HSSFWorkbook(fs, true);
var sheet = templateWorkbook.GetSheet("Sheet1");
var patriarch = sheet.CreateDrawingPatriarch();
var leftFieldHeaders = CsvHelper.GetMatrixAllLeftFields();
var productHeaders = CsvHelper.GetMatrixProducts(viewModel.ProductCampaigns);
var totalCols = leftFieldHeaders.Count + productHeaders.Count;
var colWidth = 5000;
for (int i = 0; i < totalCols; i++)
{
sheet.SetColumnWidth(i, colWidth);
}
var imageRow = sheet.CreateRow(0);
imageRow.Height = 2000;
var imageCellCount = 0;
foreach (var header in leftFieldHeaders)
{
imageRow.CreateCell(imageCellCount).SetCellValue("");
imageCellCount++;
}
foreach (var product in viewModel.ProductCampaigns)
{
try
{
var anchor = new HSSFClientAnchor(0, 0, 0, 0, imageCellCount, 0, imageCellCount, 0);
anchor.AnchorType = 2;
var path = HttpContext.Current.Server.MapPath(product.Product.ImageThumbUrl);
var picture = patriarch.CreatePicture(anchor, LoadImage(#path, templateWorkbook));
picture.Resize();
picture.LineStyle = HSSFPicture.LINESTYLE_SOLID;
}
catch (Exception)
{
}
imageCellCount++;
}
using (MemoryStream ms = new MemoryStream())
{
templateWorkbook.Write(ms);
output = ms.ToArray();
}
}
return output;
}
public static int LoadImage(string path, HSSFWorkbook wb)
{
try
{
var file = new FileStream(path, FileMode.Open, FileAccess.ReadWrite);
var buffer = new byte[file.Length];
file.Read(buffer, 0, (int)file.Length);
return wb.AddPicture(buffer, PictureType.JPEG);
}
catch (Exception)
{
return 0;
}
}
i've resolved the above in a round about way. Turns out i didn't really need to use the template and could just create the xls from scratch. This add's a bit more meta data to the file which i suspect was the issue
public static byte[] CreateExcel2(CampaignViewModel viewModel, ICollection<DeliveryPoint> deliveryPoints, string fileName)
{
FileContentResult fileContentResult;
byte[] output;
var matrixCampaignLines = viewModel.MatrixCampaignLines;
HSSFWorkbook hssfworkbook = new HSSFWorkbook();
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI Team";
hssfworkbook.DocumentSummaryInformation = dsi;
////create a entry of SummaryInformation
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Subject = "NPOI SDK Example";
hssfworkbook.SummaryInformation = si;
var sheet = hssfworkbook.CreateSheet("Sheet1");
var patriarch = sheet.CreateDrawingPatriarch();
var leftFieldHeaders = (viewModel.Campaign.EnableNameOnCampaign) ? CsvHelper.GetMatrixAllLeftFields() : CsvHelper.GetMatrixAllLeftFieldsWithoutName();
var productHeaders = CsvHelper.GetMatrixProducts(viewModel.ProductCampaigns);
var totalCols = leftFieldHeaders.Count + productHeaders.Count;
var colWidth = 5000;
for (int i = 0; i < totalCols; i++)
{
sheet.SetColumnWidth(i, colWidth);
}
var imageRow = sheet.CreateRow(0);
imageRow.Height = 2000;
var imageCellCount = 0;
foreach (var header in leftFieldHeaders)
{
imageRow.CreateCell(imageCellCount).SetCellValue("");
imageCellCount++;
}
foreach (var product in viewModel.ProductCampaigns)
{
try
{
var anchor = new HSSFClientAnchor(0, 0, 0, 0, imageCellCount, 0, imageCellCount, 0);
anchor.AnchorType = 2;
var path = HttpContext.Current.Server.MapPath(product.Product.ImageThumbUrl);
var picture = patriarch.CreatePicture(anchor, LoadImage(#path, hssfworkbook));
picture.Resize();//Comment this line if your code crashes.
picture.LineStyle = HSSFPicture.LINESTYLE_SOLID; might not
}
catch (Exception)
{
}
imageCellCount++;
}
using (MemoryStream ms = new MemoryStream())
{
hssfworkbook.Write(ms);
output = ms.ToArray();
}
return output;
}
public static int LoadImage(string path, HSSFWorkbook wb)
{
try
{
var file = new FileStream(path, FileMode.Open, FileAccess.Read);
var buffer = new byte[file.Length];
file.Read(buffer, 0, (int)file.Length);
return wb.AddPicture(buffer, PictureType.JPEG);
}
catch (Exception)
{
return 0;
}
}
I got it right now.
I am using
try
{
ISheet sheet = templateWorkbook.GetSheet(sheetName);
HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
//create the anchor
HSSFClientAnchor anchor;
anchor = new HSSFClientAnchor(0, 0, 255, 255,
start.Col, start.Row, end.Col, end.Row);
anchor.AnchorType = 2;
patriarch.CreatePicture(anchor,
LoadImage(imagePath, templateWorkbook));
}
catch (IOException ioe)
{
}
and LoadImage() method which returns path from the server.
Use this one. It runs fine.