I am not able to use DownloadDataAsync method.The only option present is DownloadStringAsync method.How can I download a zip file using this method.(I am new to windows phone 8 app development)
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I just thought to share the solution that worked for me. I created a web request to the url given and downloaded the gzip file into isolated storage file.Now after downloading i created a destination file stream and stored the compressed gzip stream file from source file to destination file using WriteByte method of GZipStream.Now we get uncompressed file.
Note:-GZipStream can be added to Visual studio from NuGet manager.
Here is the code snippet which i used to download and extract GZip file.
public async Task DownloadZipFile(Uri fileAdress, string fileName) { try {
WebRequest request = WebRequest.Create(fileAdress);
if (request != null)
{
WebResponse webResponse = await request.GetResponseAsync();
if (webResponse.ContentLength != 0)
{
using (Stream response = webResponse.GetResponseStream())
{
if (response.Length != 0)
{
using (IsolatedStorageFile isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (isolatedStorage.FileExists(fileName))
isolatedStorage.DeleteFile(fileName);
using (IsolatedStorageFileStream file = isolatedStorage.CreateFile(fileName))
{
const int BUFFER_SIZE = 100 * 1024;
byte[] buf = new byte[BUFFER_SIZE];
int bytesread;
while ((bytesread = await response.ReadAsync(buf, 0, BUFFER_SIZE)) > 0)
{
file.Write(buf, 0, bytesread);
}
file.Close();
FileStream sourceFileStream = File.OpenRead(file.Name);
FileStream destFileStream = File.Create(AppResources.OpenZipFileName);
GZipStream decompressingStream = new GZipStream(sourceFileStream, CompressionMode.Decompress);
int byteRead;
while ((byteRead = decompressingStream.ReadByte()) != -1)
{
destFileStream.WriteByte((byte)byteRead);
}
decompressingStream.Close();
sourceFileStream.Close();
destFileStream.Close();
PhoneApplicationService.Current.State["DestinationFilePath"] = destFileStream.Name;
}
}
FileDownload = true;
}
}
}
}
if (FileDownload == true)
{
return DownloadStatus.Ok;
}
else
{
return DownloadStatus.Other;
}
}
catch (Exception exc)
{
return DownloadStatus.Other;
}
}
Jinu
- 103
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Do you must use DownloadStrringAsync method? otherwise you can check these:
How to extract zipped file received from HttpWebResponse?
download and decompress a zip file in windows phone 8 application
Extract zip file from isolatedstorage
How to download a GZIP file from web to Windows Phone 7 and unzip the contents
Community
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- 1
PandaSharp
- 642
- 7
- 24
-1
To download zip file from the url first there is need to store zip files into isolated storage and after that extract it and read the file as per requirement.
Parth Mehta
- 87
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- 7