I've been trying to read a pre-built file with Car Maintenance tips, there's one in each line of my "Tips.txt" file. I've tried to follow around 4 or 5 different approaches but It's not working, it compiles but I get an exception. Here's what I've got:
using (IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication())
{
using (StreamReader sr = new StreamReader(store.OpenFile("Tips.txt", FileMode.Open, FileAccess.Read)))
{
string line;
while ((line = sr.ReadLine()) != null)
{
(App.Current as App).MyTips.Insert(new DoubleNode(line));
}
}
}
I'm getting this "Operation not permitted on IsolatedStorageFileStream", from the info inside the 2nd using statement. I tried with the build action of my "Tips.txt" set to resource, and content, yet I get the same result.
Thanks in advance.
Since you've added it to your project directory, you can't read it using Isolated Storage methods. There are various ways you can load the file. One way would be to set the text file's build type to Resource, then read it in as a stream:
//Replace 'MyProject' with the name of your XAP/Project
Stream txtStream = Application.GetResourceStream(new Uri("/MyProject;component/myTextFile.txt",
UriKind.Relative)).Stream;
using(StreamReader sr = new StreamReader(txtStream))
{
//your code
}
Related
I'm uploading a file to a SharePoint Document library using the following code:
string fileToUpload = oFile.PostedFile.FileName;
using (SPSite oSite = new SPSite(spsite))
{
using (SPWeb oWeb = oSite.OpenWeb())
{
SPList library = oWeb.Lists[documentLibraryName];
using (FileStream fs = new FileStream(fileToUpload, FileMode.Open))
{
//more logic here
This works fine in my dev environment, but when I move it to QA, I get the following error when try to upload a file:
System.IO.FileNotFoundException:
Could not find file 'c:\windows\system32\inetsrv\file_to_upload'.
I have googled around, and it seems like I may need to use PostedFile.InputStream instead of PostedFile.Name.
But if set fileToUpload equal to oFile.PostedFile.InputStream, then I am not able to use this bit of code anymore:
using (FileStream fs = new FileStream(fileToUpload, FileMode.Open))
I would like to still use this code as I need to access fs.name later on in my code.
Any idea how I could get this problem resolved?
Give it a try, this might be helpful
https://social.msdn.microsoft.com/Forums/sharepoint/en-US/96f81cea-12b2-46f0-83ec-64c7fd9532cd/using-aspnet-fileupload-control-in-sharepoint-2010-announcement-list-newformaspx?forum=sharepointdevelopmentprevious
Hi I'm trying to upload a file to sharepoint 2010 using the client api with meta data and also checkin the file after I'm done. Below is my code:
public void UploadDocument(SharePointFolder folder, String filename, Boolean overwrite)
{
var fileInfo = new FileInfo(filename);
var targetLocation = String.Format("{0}{1}{2}", folder.ServerRelativeUrl,
Path.AltDirectorySeparatorChar, fileInfo.Name);
using (var fs = new FileStream(filename, FileMode.Open))
{
SPFile.SaveBinaryDirect(mClientContext, targetLocation, fs, overwrite);
}
// doesn't work
SPFile newFile = mRootWeb.GetFileByServerRelativeUrl(targetLocation);
mClientContext.Load(newFile);
mClientContext.ExecuteQuery();
//check out to make sure not to create multiple versions
newFile.CheckOut();
// use OverwriteCheckIn type to make sure not to create multiple versions
newFile.CheckIn("test", CheckinType.OverwriteCheckIn);
mClientContext.Load(newFile);
mClientContext.ExecuteQuery();
//SPFile uploadFile = mRootWeb.GetFileByServerRelativeUrl(targetLocation);
//uploadFile.CheckOut();
//uploadFile.CheckIn("SOME VERSION COMMENT I'D LIKE TO ADD", CheckinType.OverwriteCheckIn);
//mClientContext.ExecuteQuery();
}
I'm able to upload the file but I can't add any meta data and file is checked out. I want to add some meta data and checkin the file after I'm done.
My SharePointFolder class has the serverRelativeUrl of the folder path to upload to. Any help greatly appreciated.
You need a credential before the executeQuery(); and SaveBinaryDirect();
For example:
mClientContext.Credentials = new NetworkCredential("LoginID","LoginPW", "LoginDomain");
SPFile newFile = mRootWeb.GetFileByServerRelativeUrl(targetLocation);
mClientContext.Load(newFile);
mClientContext.ExecuteQuery();
Quick search here yielded nothing. So, I have started using some rather roundabout ways to use StreamWriter in my WinRT Application. Reading works well, writing works differently. What' I'm seeing is that when I select my file to write, if I choose a new file then no problem. The file is created as I expect. If I choose to overwrite a file, then the file is overwritten to a point, but the point where the stream stops writing, if the original file was large, then the old contents exist past where my new stream writes.
The code is as such:
public async void WriteFile(StorageFile selectedFileToSave)
{
// At this point, selectedFileToSave is from the Save File picker so can be a enw or existing file
StreamWriter writeStream;
Encoding enc = new UTF8Encoding();
Stream dotNetStream;
dotNetStream = await selectedFileToSave.OpenStreamForWriteAsync();
StreamWriter writeStream = new StreamWriter(dotNetStream, enc);
// Do writing here
// Close
writeStream.Write(Environment.NewLine);
await writeStream.FlushAsync();
await dotNetStream.FlushAsync();
}
Can anyone offer clues on what I could be missing? There are lots of functions missing in WinRT, so not really following ways to get around this
Alternatively you can set length of the stream to 0 with SetLength method before using StreamWriter:
var stream = await file.OpenStreamForWriteAsync();
stream.SetLength(0);
using (var writer = new StreamWriter(stream))
{
writer.Write(text);
}
Why not just use the helper methods in FileIO class? You could call:
FileIO.WriteTextAsync(selectedFileToSave, newTextContents);
If you really need a StreamWriter, first truncate the file by calling
FileIO.WriteBytesAsync(selectedFileToSave, new byte[0]);
And then continue with your existing code.
I have a WinRT Metro project which displays images based on a selected item. However, some of the images selected will not exist. What I want to be able to do is trap the case where they don't exist and display an alternative.
Here is my code so far:
internal string GetMyImage(string imageDescription)
{
string myImage = string.Format("Assets/MyImages/{0}.jpg", imageDescription.Replace(" ", ""));
// Need to check here if the above asset actually exists
return myImage;
}
Example calls:
GetMyImage("First Picture");
GetMyImage("Second Picture");
So Assets/MyImages/SecondPicture.jpg exists, but Assets/MyImages/FirstPicture.jpg does not.
At first I thought of using the WinRT equivalent of File.Exists(), but there doesn't appear to be one. Without having to go to the extent of trying to open the file and catching an error, can I simply check if either the file exists, or the file exists in the project?
You could use GetFilesAsync from here to enumerate the existing files. This seems to make sense considering you have multiple files which might not exist.
Gets a list of all files in the current folder and its sub-folders. Files are filtered and sorted based on the specified CommonFileQuery.
var folder = await StorageFolder.GetFolderFromPathAsync("Assets/MyImages/");
var files = await folder.GetFilesAsync(CommonFileQuery.OrderByName);
var file = files.FirstOrDefault(x => x.Name == "fileName");
if (file != null)
{
//do stuff
}
Edit:
As #Filip Skakun pointed out, the resource manager has a resource mapping on which you can call ContainsKey which has the benefit of checking for qualified resources as well (i.e. localized, scaled etc).
Edit 2:
Windows 8.1 introduced a new method for getting files and folders:
var result = await ApplicationData.Current.LocalFolder.TryGetItemAsync("fileName") as IStorageFile;
if (result != null)
//file exists
else
//file doesn't exist
There's two ways you can handle it.
1) Catch the FileNotFoundException when trying to get the file:
Windows.Storage.StorageFolder installedLocation =
Windows.ApplicationModel.Package.Current.InstalledLocation;
try
{
// Don't forget to decorate your method or event with async when using await
var file = await installedLocation.GetFileAsync(fileName);
// Exception wasn't raised, therefore the file exists
System.Diagnostics.Debug.WriteLine("We have the file!");
}
catch (System.IO.FileNotFoundException fileNotFoundEx)
{
System.Diagnostics.Debug.WriteLine("File doesn't exist. Use default.");
}
catch (Exception ex)
{
// Handle unknown error
}
2) as mydogisbox recommends, using LINQ. Although the method I tested is slightly different:
Windows.Storage.StorageFolder installedLocation =
Windows.ApplicationModel.Package.Current.InstalledLocation;
var files = await installedLocation.GetFilesAsync(CommonFileQuery.OrderByName);
var file = files.FirstOrDefault(x => x.Name == fileName);
if (file != null)
{
System.Diagnostics.Debug.WriteLine("We have the file!");
}
else
{
System.Diagnostics.Debug.WriteLine("No File. Use default.");
}
BitmapImage has an ImageFailed event that fires if the image can't be loaded. This would let you try to load the original image, and then react if it's not there.
Of course, this requires that you instantiate the BitmapImage yourself, rather than just build the Uri.
Sample checking for resource availability for c++ /cx (tested with Windows Phone 8.1):
std::wstring resPath = L"Img/my.bmp";
std::wstring resKey = L"Files/" + resPath;
bool exists = Windows::ApplicationModel::Resources::Core::ResourceManager::Current->MainResourceMap->HasKey(ref new Platform::String(resKey.c_str()));
I have been trying to find the best way to do this I have thought of extracting the contents of the .jar then moving the files into the directory then putting it back as a jar. Im not sure is the best solution or how I will do it. I have looked at DotNetZip & SharpZipLib but don't know what one to use.
If anyone can give me a link to the code on how to do this it would be appreciated.
For DotNetZip you can find very simple VB.NET examples of both creating a zip archive and extracting a zip archive into a directory here. Just remember to save the compressed file with extension .jar .
For SharpZipLib there are somewhat more comprehensive examples of archive creation and extraction here.
If none of these libraries manage to extract the full JAR archive, you could also consider accessing a more full-fledged compression software such as 7-zip, either starting it as a separate process using Process.Start or using its COM interface to access the relevant methods in the 7za.dll. More information on COM usage can be found here.
I think you are working with Minecraft 1.3.1 no? If you are, there is a file contained in the zip called aux.class, which unfortunately is a reserved filename in windows. I've been trying to automate the process of modding, while manipulating the jar file myself, and have had little success. The only option I have yet to explore is find a way to extract the contents of the jar file to a temporary location, while watching for that exception. When it occurs, rename the file to a temp name, extract and move on. Then while recreating the zip file, give the file the original name in the archive. From my own experience, SharZipLib doesnt do what you need it do nicely, or at least I couldnt figure out how. I suggest using Ionic Zip (Dot Net Zip) instead, and trying the rename route on the offending files. In addition, I also posted a question about this. You can see how far I got at Extract zip entries to another Zip file
Edit - I tested out .net zip more (available from http://dotnetzip.codeplex.com/), and heres what you need. I imagine it will work with any zip file that contains reserved file names. I know its in C#, but hey cant do all the work for ya :P
public static void CopyToZip(string inArchive, string outArchive, string tempPath)
{
ZipFile inZip = null;
ZipFile outZip = null;
try
{
inZip = new ZipFile(inArchive);
outZip = new ZipFile(outArchive);
List<string> tempNames = new List<string>();
List<string> originalNames = new List<string>();
int I = 0;
foreach (ZipEntry entry in inZip)
{
if (!entry.IsDirectory)
{
string tempName = Path.Combine(tempPath, "tmp.tmp");
string oldName = entry.FileName;
byte[] buffer = new byte[4026];
Stream inStream = null;
FileStream stream = null;
try
{
inStream = entry.OpenReader();
stream = new FileStream(tempName, FileMode.Create, FileAccess.ReadWrite);
int size = 0;
while ((size = inStream.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, size);
}
inStream.Close();
stream.Flush();
stream.Close();
inStream = new FileStream(tempName, FileMode.Open, FileAccess.Read);
outZip.AddEntry(oldName, inStream);
outZip.Save();
}
catch (Exception exe)
{
throw exe;
}
finally
{
try { inStream.Close(); }
catch (Exception ignore) { }
try { stream.Close(); }
catch (Exception ignore) { }
}
}
}
}
catch (Exception e)
{
throw e;
}
}