Develop Reference

How to make 2 process access the same path?

I'm using c#. I'm receiving an error about a path is currently accessed by other processes. What my system is trying to do is to access the path: #"C:\temps\" + client_ids + "_" + rown + ".pdf" and use the same path for attachment before sending it to client's email.
here's what I've done so far. I comment out some of my code because I'm not sure what to do.
FileStream fs = null;
using (fs = new FileStream(#"C:\\temps\\" + client_ids + "_" +
rown + ".pdf",
FileMode.Open,FileAccess.Read,FileShare.ReadWrite))
{
TextReader tr = new StreamReader(fs);
//report.ExportToDisk
//(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat,tr);
//report.Dispose();
//Attachment files = new Attachment(tr);
//Mailmsg.Attachments.Add(files);
//Clients.Send(Mailmsg);
}

you can make temp copy of file before you use it in mail attachment and then use the copy instead of the original file

You cannot attach a file to an email if that file is open. You must close (save) the file first.
While #ali answer is technically correct, it is unnecessary. Why go through the overhead of creating a copy of the file which then needs to be deleted, etc.?
Assuming I understand what you are trying to do correctly, simply move your code for mail to after the file is successfully created and saved. And, I don't think you need the overhead of either the filestream or the textreader. As long as your report object can save the file to disk someplace, you can attach that file to your email message and then send it.
While I do not claim to know anything about how Crystal Decisions handles exports, etc. Perhaps something like this would work:
(I got this code from: https://msdn.microsoft.com/en-us/library/ms226036(v=vs.90).aspx)
private void ExportToDisk (string fileName)
{
ExportOptions exportOpts = new ExportOptions();
DiskFileDestinationOptions diskOpts =
ExportOptions.CreateDiskFileDestinationOptions();
exportOpts.ExportFormatType = ExportFormatType.RichText;
exportOpts.ExportDestinationType =
ExportDestinationType.DiskFile;
diskOpts.DiskFileName = fileName;
exportOpts.ExportDestinationOptions = diskOpts;
Report.Export(exportOpts);
}
You will need to change the ExportFormatType property.
Then, simply attach the file to your email and send:
Attachment Files = new Attachment(filename);
Mailmsg.Attachments.add(files);
Clients.Send(Mailmsg);

File.Copy Unauthorized access C#

I've started to encounter a problem with File.Copy. This works fine for my data creation script, managing to duplicate thousands of files with no issues. My problem occurs when trying to create temp files later in my code.
I have added the code sample below that isn't working correctly. I've tried numerous different ways to try to resolve this to no avail. What I am doing is copying some user data files created in a directory on the C drive into a temp folder inside that user data folder.
Code
foreach (string originalFile in OriginalDataFileNames)
{
string tempFile = originalFile;
TempDataFiles.Add(tempFile);
Console.WriteLine("GlobalDataCtrl: Original Data File: " + XWSDataDirectory + "\\" + tempFile);
Console.WriteLine("GlobalDataCtrl: Saved Temp Data File: " + tempPath + "\\" + tempFile);
File.Copy(XWSDataDirectory + "\\" + originalFile, tempPath + "\\" + tempFile);
}
Exit Error
The program '[6256] XtremeWrestlingSim.vshost.exe' has exited with code -1073741819 (0xc0000005) 'Access violation'.
Any help is appreciated, thanks in advance!
SOLUTION:
FileStream outputFS = null;
FileStream inputFS = null;
outputFS = new FileStream(tempPath + "\\" + tempFile, FileMode.CreateNew, FileAccess.ReadWrite);
using (inputFS = new FileStream(XWSDataDirectory + "\\" + originalFile, FileMode.Open))
{
inputFS.CopyTo(outputFS);
}
outputFS.Close();
inputFS.Close();
Not sure how nicely formatted this is, but it works. Replace File.Copy with the above code.

You are using File.Create just before you call File.Copy, I think that is the issue, it is leaving an open stream.
Maybe removing the File.Create call will solve the issue. If not you could get the returned value (which is a stream) and close it before trying to copy.
The file is opened with read/write access and must be closed before it can be opened by another application.
See remarks https://msdn.microsoft.com/en-us/library/ms143361(v=vs.110).aspx

Issues converting Adobe Ai and Psd files using Magick

I'm using Magick to convert Adobe files (Pdf, Ai, Psd) to Png images and it all works fine except that the Ai files can take over a minute to convert and Psd files lose their shape when converted, as the layers are laid out side by side instead of overlaying each other. This is the code I am using..
MagickReadSettings settings = new MagickReadSettings();
settings.Density = new Density(300);
using (MagickImageCollection images = new MagickImageCollection())
{
images.Read(file, settings);
using (MagickImage horizontal = images.AppendHorizontally())
{
file = path + "\\" + ThumbnailFolder + "\\TempThumb.Png";
horizontal.Write(path + "\\" + ThumbnailFolder + "\\TempThumb.Png");
}
}
Are there changes I can make in the Settings to fix these issues?

I've had some help to fix this issue which I want to share in case anyone has a similar problem. Firstly the .ai files are taking so long because of the detailed resolution set out in my settings, reduce the resolution and they are created faster. Secondly, the Psd files are being created as they are because I'm appending them using the Horizontal method. When I changed my code to the code below it worked.
using (MagickImageCollection images = new MagickImageCollection())
{
images.Read(file, settings);
images.Write(path + "\\" + ThumbnailFolder + "\\TempThumb.png");
}

Error trying to save image in file system in Azure Server - A generic error occurred in GDI+

I am trying to save an image in an azure worker roles' file system.
This is my code :
BlobStream inputImage = inputBlob.OpenRead();
Stream inputStream = inputImage;
string inputPath = "F:\\approot\\input\\" + imageId; //Image id is 582
inputStream.Position = 0;
//save image to physicall file
var img = Image.FromStream(inputStream);
string imagePath = pInputPath + "\\" + pImageId + ".png";
img.Save(imagePath, ImageFormat.Png);
var xml = "";
This problem came all of the sudden, my application was working but suddenly it started crashing at this point.

I'm guessing that the issue is with the f drive. You'll find that, occasionally, e: and f: may change upon restart. Since you claimed that things were working, and then suddenly started crashing, I'm thinking that, if you rdp into your role instance, you'll find that approot is now on e: instead of f:.
There should be an environment variable, RoleRoot, that you can use for determining what drive your approot is on:
Environment.GetEnvironmentVariable("RoleRoot");

C# Append Timestamp to Filepath

I have the following problem or question,
I have this function
private void SavePic(Canvas canvas, string filename)
{
RenderTargetBitmap renderBitmap = new RenderTargetBitmap(
(int)canvas.Width, (int)canvas.Height,
96d, 96d, PixelFormats.Pbgra32);
// needed otherwise the image output is black
canvas.Measure(new Size((int)canvas.Width, (int)canvas.Height));
canvas.Arrange(new Rect(new Size((int)canvas.Width, (int)canvas.Height)));
renderBitmap.Render(canvas);
//JpegBitmapEncoder encoder = new JpegBitmapEncoder();
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(renderBitmap));
using (FileStream file = File.Create(filename))
{
encoder.Save(file);
}
}
and the corresponding call
SavePic(mySuperDefaultPainting, #"C:\KinDraw\out.png");
Now I wanted to attach the file name the date + time?
You can grab this DateTime function in the function call?
maybe I can someone help here?

try (Updated for File Path):
string fileName=string.Format("{0}-{1:ddMMMyyyy-HHmm}.png", #"C:\KinDraw\out",
DateTime.Now);
if(!Directory.Exists(Path.GetDirectoryName(fileName)))
{
Directory.CreateDirectory(Path.GetDirectoryName(fileName));
}
SavePic(mySuperDefaultPainting, fileName);
Say the time is 29-JAN-2013 07:30 PM it will give you: C:\KinDraw\out-29JAN2013-1930.png.
But please check details about CreateDirectory on this MSDN page. Also look for Exceptions and wrap in try-catch blocks.

string timestamp =DateTime.Now.ToString("MMddyyyy.HHmmss");
SavePic(mySuperDefaultPainting, #"C:\KinDraw\out"+timestamp+".png");
Update: (to create the directory if it does not exist)
if (!Directory.Exists(filepath))
Directory.CreateDirectory(filepath);
Hope it helps :)

Try to add this at the beginning of your code:
var extension = Path.GetExtension(filename);
var newName = filename.Replace(filename, extension) + DateTime.Now.ToString("yyyy-MM-dd HH:mm:dd") + extension;

Just put this line in there:
string stampedFileName = filename.Replace(".",
string.Format("{0:YYYY-mm-dd hhmmss}", DateTime.UtcNow) + ".");
and then change
using (FileStream file = File.Create(filename))
to
using (FileStream file = File.Create(stampedFilename))
It is important to use DateTime.UtcNow rather than DateTime.Now because the former is not influenced by daylight saving time.
EDIT: The format I propose above has the advantage that sorting your filenames alphabetically then automatically also sorts them chronologically.

This is how I did it and it works. Tweaked #Avishek code a bit to make it work for mine. No need to delete file or lose what's in it.
Call "Rename()" method after you output the file..
public static void Rename()
{
string timestamp = DateTime.Now.ToString("MMddyyyy.HHmmss");
string originalFile = #"C:\Users\Data_Output\" + fileName + ".csv";
string newFile = #"C:\Users\Data_Output\" + fileName + "_" + timestamp + ".csv";
File.Move(originalFile, newFile);
}