Develop Reference

Cannot Write Multiple Paragraph in Aspose

I have an issue when I try to write multiple paragraphs in existing Shape. Only the first paragraph is written. I debug the code and I found that the Shape object as all the paragraphs I want. The problem is when I write to file I found only the first one. I share with you the project code.
class Program
{
public static void Run()
{
string dataDir = ConfigurationManager.AppSettings["directoryToSave"];
string srcDir = ConfigurationManager.AppSettings["Source"];
string appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
string file = Path.Combine(appData, srcDir);
using (Presentation presentation = new Presentation(srcDir))
{
IMasterLayoutSlideCollection layoutSlides = presentation.Masters[0].LayoutSlides;
ILayoutSlide layoutSlide = null;
foreach (ILayoutSlide titleAndObjectLayoutSlide in layoutSlides)
{
if (titleAndObjectLayoutSlide.Name == "TITRE_CONTENU")
{
layoutSlide = titleAndObjectLayoutSlide;
break;
}
}
var contenu = File.ReadAllText(#"E:\DemosProject\PF_GEN\PF_GEN\Source\contenu.txt", Encoding.UTF8);
IAutoShape contenuShape = (IAutoShape)layoutSlide.Shapes.SingleOrDefault(r => r.Name.Equals("contenu"));
ITextFrame txt = ((IAutoShape)contenuShape).TextFrame;
txt.Paragraphs.Clear();
string[] lines = contenu.Split(new[] { Environment.NewLine }, StringSplitOptions.None).Where(str => !String.IsNullOrEmpty(str)).ToArray();
for (int i = 0; i < lines.Length; i++)
{
var portion = new Portion();
portion.Text = lines[i];
var paragraphe = new Paragraph();
paragraphe.Portions.Add(portion);
txt.Paragraphs.Add(paragraphe);
}
presentation.Slides.InsertEmptySlide(0, layoutSlide);
presentation.Save(dataDir + "AddLayoutSlides_out.pptx", SaveFormat.Pptx);
}
}
static void Main(string[] args)
{
try
{
var path = ConfigurationManager.AppSettings["sourceAsposeLicensePath"];
License license = new License();
license.SetLicense(path);
Run();
}
catch (Exception ex)
{
Console.WriteLine("Error" + ex.Message);
}
finally
{
Console.WriteLine("Terminated");
Console.ReadKey();
}
}
}
You can find the ppt file (source file) in the attachement file. (https://gofile.io/?c=JpBDS8 1)
Is there any thing missing in my code?
Thanks

I have observed your requirements and suggest you to please try using following sample code on your end. In your sample code, you are adding different paragraphs to a shape inside LayoutSlide and then adding a slide using that LayoutSlide to contain the desired shape. This approach is not correct. You actually need to first add slide based on LayoutSlide and then add text to that shape as per your requirements. The following code will be helpful to you.
public static void RunParaText()
{
string path = #"C:\Aspose Data\";
string dataDir = path;
string srcDir = path + "Master.pptx";
//string appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
//string file = Path.Combine(appData, srcDir);
using (Presentation presentation = new Presentation(srcDir))
{
IMasterLayoutSlideCollection layoutSlides = presentation.Masters[0].LayoutSlides;
ILayoutSlide layoutSlide = null;
foreach (ILayoutSlide titleAndObjectLayoutSlide in layoutSlides)
{
if (titleAndObjectLayoutSlide.Name == "TITRE_CONTENU")
{
layoutSlide = titleAndObjectLayoutSlide;
break;
}
}
var contenu = File.ReadAllText(dataDir+"contenu.txt", Encoding.UTF8);
var slide=presentation.Slides.InsertEmptySlide(0, layoutSlide);
IAutoShape contenuShape = (IAutoShape)slide.Shapes.SingleOrDefault(r => r.Name.Equals("contenu"));
//IAutoShape contenuShape = (IAutoShape)layoutSlide.Shapes.SingleOrDefault(r => r.Name.Equals("contenu"));
ITextFrame txt = ((IAutoShape)contenuShape).TextFrame;
txt.Paragraphs.Clear();
string[] lines = contenu.Split(new[] { Environment.NewLine }, StringSplitOptions.None).Where(str => !String.IsNullOrEmpty(str)).ToArray();
for (int i = 0; i < lines.Length; i++)
{
var portion = new Portion();
portion.Text = lines[i];
var paragraphe = new Paragraph();
paragraphe.Portions.Add(portion);
txt.Paragraphs.Add(paragraphe);
}
//Change font size w.r.t shape size
contenuShape.TextFrame.TextFrameFormat.AutofitType = TextAutofitType.Normal;
presentation.Save(dataDir + "AddLayoutSlides_out.pptx", SaveFormat.Pptx);
}
}
I am working as Support developer/ Evangelist at Aspose.

Asp.Net Mvc Delete file issue

I have an issue with Files.
I am doing an image importer so clients put their files on an FTP server and then they can import it in the application.
During the import process I copy the file in the FTP Folder to another folder with File.copy
public List<Visuel> ImportVisuel(int galerieId, string[] images)
{
Galerie targetGalerie = MemoryCache.GetGaleriById(galerieId);
List<FormatImage> listeFormats = MemoryCache.FormatImageToList();
int i = 0;
List<Visuel> visuelAddList = new List<Visuel>();
List<Visuel> visuelUpdateList = new List<Visuel>();
List<Visuel> returnList = new List<Visuel>();
foreach (string item in images)
{
i++;
Progress.ImportProgress[Progress.Guid] = "Image " + i + " sur " + images.Count() + " importées";
string extension = Path.GetExtension(item);
string fileName = Path.GetFileName(item);
string originalPath = HttpContext.Current.Request.PhysicalApplicationPath + "Uploads\\";
string destinationPath = HttpContext.Current.Server.MapPath("~/Images/Catalogue") + "\\";
Visuel importImage = MemoryCache.GetVisuelByFilName(fileName);
bool update = true;
if (importImage == null) { importImage = new Visuel(); update = false; }
Size imageSize = importImage.GetJpegImageSize(originalPath + fileName);
FormatImage format = listeFormats.Where(f => f.width == imageSize.Width && f.height == imageSize.Height).FirstOrDefault();
string saveFileName = Guid.NewGuid() + extension;
File.Copy(originalPath + fileName, destinationPath + saveFileName);
if (format != null)
{
importImage.format = format;
switch (format.key)
{
case "Catalogue":
importImage.fileName = saveFileName;
importImage.originalFileName = fileName;
importImage.dossier = targetGalerie;
importImage.dossier_id = targetGalerie.id;
importImage.filePath = "Images/Catalogue/";
importImage.largeur = imageSize.Width;
importImage.hauteur = imageSize.Height;
importImage.isRoot = true;
if (update == false) { MemoryCache.Add(ref importImage); returnList.Add(importImage); }
if (update == true) visuelUpdateList.Add(importImage);
foreach (FormatImage f in listeFormats)
{
if (f.key.StartsWith("Catalogue_"))
{
string[] keys = f.key.Split('_');
string destinationFileName = saveFileName.Insert(saveFileName.IndexOf('.'), "-" + keys[1].ToString());
string destinationFileNameDeclinaison = destinationPath + destinationFileName;
VisuelResizer declinaison = new VisuelResizer();
declinaison.Save(originalPath + fileName, f.width, f.height, 1000, destinationFileNameDeclinaison);
Visuel visuel = MemoryCache.GetVisuelByFilName(fileName.Insert(fileName.IndexOf('.'), "-" + keys[1].ToString()));
update = true;
if (visuel == null) { visuel = new Visuel(); update = false; }
visuel.parent = importImage;
visuel.filePath = "Images/Catalogue/";
visuel.fileName = destinationFileName;
visuel.originalFileName = string.Empty;
visuel.format = f;
//visuel.dossier = targetGalerie; On s'en fout pour les déclinaisons
visuel.largeur = f.width;
visuel.hauteur = f.height;
if (update == false)
{
visuelAddList.Add(visuel);
}
else
{
visuelUpdateList.Add(visuel);
}
//importImage.declinaisons.Add(visuel);
}
}
break;
}
}
}
MemoryCache.Add(ref visuelAddList);
// FONCTION à implémenter
MemoryCache.Update(ref visuelUpdateList);
return returnList;
}
After some processes on the copy (the original file is no more used)
the client have a pop-up asking him if he wants to delete the original files in the ftp folder.
If he clicks on Ok another method is called on the same controller
and this method use
public void DeleteImageFile(string[] files)
{
for (int i = 0; i < files.Length; i++)
{
File.Delete(HttpContext.Current.Request.PhysicalApplicationPath + files[i].Replace(#"/", #"\"));
}
}
This method works fine and really delete the good files when I use it in other context.
But here I have an error message:
Process can't acces to file ... because it's used by another process.
Someone have an idea?
Thank you.
Here's the screenshot of Process Explorer

There are couple of thing you can do here.
1) If you can repro it, you can use Process Explorer at that moment and see which process is locking the file and if the process is ur process then making sure that you close the file handle after your work is done.
2) Use try/catch around the delete statement and retry after few seconds to see if the file handle was released.
3) If you can do it offline you can put in some queue and do the deletion on it later on.

You solve this by using c# locks. Just embed your code inside a lock statement and your threads will be safe and wait each other to complete processing.

I found the solution:
in my import method, there a call to that method
public void Save(string originalFile, int maxWidth, int maxHeight, int quality, string filePath)
{
Bitmap image = new Bitmap(originalFile);
Save(ref image, maxWidth, maxHeight, quality, filePath);
}
The bitmap maintains the file opened blocking delete.
just added
image.Dispose();
in the methos and it work fine.
Thank you for your help, and thank you for process explorer. Very useful tool

Windows Universal - Display images from Assets

I'm trying to scroll through images in my app, but I'm having trouble figuring out how to populate my list. The images are named using numbers from 1.jpg upwards. If anyone could help it would be great.
async private void Exec()
{
// Get the file location.
StorageFolder appFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
string myImageFolder = (appFolder.Path + "\\Assets\\Images");
int imageNumber = 1;
List<Uri> fileList = new List<Uri>();
foreach (var fileItem in fileList)
{
string imageFileName = imageNumber + ".jpg";
Uri uri = new Uri(myImageFolder + "/" + imageFileName);
fileList.Add(uri);
image.Source = new BitmapImage(new Uri(uri.ToString()));
await Task.Delay(TimeSpan.FromSeconds(1));
imageNumber++;
}
}
UPDATE
I have tried to create a workaround and do this without the foreach statement but its crashing when testing if the next file exists: :(
async private void Exec()
{
// Get the file location.
string root = Windows.ApplicationModel.Package.Current.InstalledLocation.Path;
string path = root + #"\Assets\Images";
StorageFolder appFolder = await StorageFolder.GetFolderFromPathAsync(path);
int imageNumber = 1;
int test = imageNumber;
do
{
string imageFileName = imageNumber + ".jpg";
Uri uri = new Uri(path + "\\" + imageFileName);
image.Source = new BitmapImage(new Uri(uri.ToString()));
await Task.Delay(TimeSpan.FromSeconds(1));
test = imageNumber + 1;
imageNumber++;
string testFile = test + ".jpg";
Uri uri1 = new Uri(path + "\\" + testFile);
if (await appFolder.TryGetItemAsync(uri1.ToString()) != null)
{
test = 99999;
}
}
while (test != 99999);
}

Your list does not contain any items. Your foreach will never run, as there will be no entries in your list.
You need to go through all paths in myImageFolder-root and add those uris to the list, then you can just use them in a foreach to create images and set their source, for every uri in the list.
Also imageNumber is un-needed then as you will have the URIs.
Prep the list of URIs first, by traversing the folder. Then modify the existing foreach to use those to build image objects.
Also, refrain from adding to a collection WHILE iterating it...

I have this working, and not a single foreach was required :D Thanks #Richard Eriksson
async private void Exec()
{
// Get the file location.
string root = Windows.ApplicationModel.Package.Current.InstalledLocation.Path;
string path = root + #"\Assets\Images";
StorageFolder appFolder = await StorageFolder.GetFolderFromPathAsync(path);
int imageNumber = 1;
int test = imageNumber;
do
{
string imageFileName = imageNumber + ".jpg";
Uri uri = new Uri(path + "\\" + imageFileName);
image.Source = new BitmapImage(new Uri(uri.ToString()));
await Task.Delay(TimeSpan.FromSeconds(1));
test = imageNumber + 1;
imageNumber++;
string testFile = test + ".jpg";
if (await appFolder.TryGetItemAsync(testFile) != null)
{
test = 99999;
}
else
{
test = 1;
}
}
while (test == 99999);
}

Downloading multiple files synchronously C#

I'm trying to download multiple files with several threads. The program uses a BFS algorithm to reach all the files given a particular url: http://www.police.am/Hanraqve/ The problem is that the same file can be downloaded multiple times as several threads are released. I'm thinking of a way to synchronize the download process so that each file is downloaded once only with the help of Mutexes or Semaphores. Any idea or actual code would be very much appreciated. Here is my initial code
public static async Task Download()
{
nodes.Enqueue(root);
while (nodes.Count() != 0)
{
String currentNode = "";
if (nodes.TryDequeue(out currentNode))
{
if (!visitedNodes.Contains(currentNode))
{
visitedNodes.Add(currentNode);
if (isFolder(currentNode))
{
List<String> urls = GetUrlsFromHtml(currentNode);
foreach (String url in urls)
{
nodes.Enqueue(url);
}
}
else
{
string fileName = currentNode.Remove(0, currentNode.LastIndexOf('/') + 1);
using (WebClient webClient = new WebClient())
{
await webClient.DownloadFileTaskAsync(new Uri(currentNode), destinationFolderPath + #"\" + fileName);
files.Enqueue(destinationFolderPath + #"\" + fileName);
}
}
}
}
}
//cts.Cancel();
}
public static List<String> GetUrlsFromHtml(string url)
{
HtmlWeb hw = new HtmlWeb();
HtmlDocument doc = hw.Load(url);
List<String> urls = new List<String>();
foreach (HtmlNode htmlNode in doc.DocumentNode.SelectNodes("//a[#href]"))
{
string hrefValue = htmlNode.Attributes["href"].Value;
if (hrefValue[0] >= '1' && hrefValue[0] <= '9')
{
urls.Add(url + hrefValue);
}
}
return urls;
}
public static bool isFolder(string url)
{
return url.EndsWith("/");
}
}
}

Check the urls your storing in visited, they may be different but still go to the same page.
http://foo.com?a=bar
http://foo.bar?b=foo

C# WebClient Downloads empty file

I'm working on an app that uses Bing's API to search and download images.
Bing's API provides a set of image links and I iterate over them and download each one.
The problem that I'm having is that sometimes the downloaded file size is 0Kb.
I assume that happens because WebClient first creates the filename and then tries to write to it. So when it can't write to it for some reason this happens. The problem is that it happens without throwing an exception so my 'Catch' statement can't catch this and delete the file.
public void imageFetcher(string performerName, int maxNumberOfImages, RichTextBox richTextBox)
{
string performersDirPath = Environment.CurrentDirectory + #"\Performers\";
string performerPath = performersDirPath + performerName + #"\";
if (!Directory.Exists(performersDirPath))
{
Directory.CreateDirectory(performersDirPath);
}
if (!Directory.Exists(performerPath))
{
Directory.CreateDirectory(performerPath);
}
// Searching for Images using bing api
IEnumerable<Bing.ImageResult> bingSearch = bingImageSearch(performerName);
int i = 0;
foreach (var result in bingSearch)
{
downloadImage(result.MediaUrl, performerPath + performerName + i + ".jpg",richTextBox);
i++;
if (i == maxNumberOfImages)
{
break;
}
}
}
The download method:
public void downloadImage(string imgUrl, string saveDestination, RichTextBox richTextBox)
{
if (File.Exists(saveDestination))
{
richTextBox.ForeColor = System.Drawing.Color.Red;
richTextBox.AppendText("The File: " + saveDestination + "Already exists");
}
else
{
try
{
using (WebClient client = new WebClient())
{
client.DownloadFileCompleted += new AsyncCompletedEventHandler(((sender, e) => downloadFinished(sender, e, saveDestination , richTextBox)));
Uri imgURI = new Uri(imgUrl, UriKind.Absolute);
client.DownloadFileAsync(imgURI, saveDestination);
}
}
catch (Exception e)
{
richTextBox.AppendText("There was an exception downloading the file" + imgUrl);
richTextBox.AppendText("Deleteing" + saveDestination);
File.Delete(saveDestination);
richTextBox.AppendText("File deleted!");
}
}
}
This happens also when I try to wait for the client to finish using:
client.DownloadFileAsync(imgURI, saveDestination);
while (client.IsBusy)
{
}
Can anyone please tell me what I'm doing wrong?
In other simular question the solution was to keep the Webclient instance open until download is finished.. I'm doing this with this loop:
while (client.IsBusy){}
Yet the results are the same.
Update:
I resorted to not use webclient, instead I used this code:
try
{
byte[] lnBuffer;
byte[] lnFile;
using (BinaryReader lxBR = new BinaryReader(stream))
{
using (MemoryStream lxMS = new MemoryStream())
{
lnBuffer = lxBR.ReadBytes(1024);
while (lnBuffer.Length > 0)
{
lxMS.Write(lnBuffer, 0, lnBuffer.Length);
lnBuffer = lxBR.ReadBytes(1024);
}
lnFile = new byte[(int)lxMS.Length];
lxMS.Position = 0;
lxMS.Read(lnFile, 0, lnFile.Length);
}
using (System.IO.FileStream lxFS = new FileStream(saveDestination, FileMode.Create))
{
lxFS.Write(lnFile, 0, lnFile.Length);
}
This solves the problem almost complelty, there are still one or two 0KB files but I assume it's because of network errors.

To see possible exceptions - try changing DownloadFileAsync to just DownloadFile - my problem was "Can not create SSL/TLS secure channel". Hope this will help someone.