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Deleting a file after printing

I am using the following code to create a file at a temp path and then delete it after the print happened successfully. But after printing I try to dispose the file and when I try to delete the file, I still get an exception saying "The process cannot access the file 'Chart0.png' because it is being used by another process." Please help.
I also tried putting the deleting code in the finally block but still no luck.
public static bool PrintAllCharts(Dictionary<string, ILightningChartInterface> charts)
{
DirectoryInfo info = null;
try
{
string FilePathWithoutFileName = string.Empty;
info = Directory.CreateDirectory(#"C:\TempCharts");
for (int i = 0; i < charts.Count; i++)
{
KeyValuePair<string, ILightningChartInterface> kp = charts.ElementAt(i);
FilePathWithoutFileName = info.FullName;
string FullPath = string.Format("{0}/Chart{1}.png", FilePathWithoutFileName, i.ToString());
kp.Value.SaveChartToFile(FullPath);
}
var files = Directory.GetFiles(FilePathWithoutFileName);
using (var pdoc = new PrintDocument())
{
using (var pdi = new System.Windows.Forms.PrintDialog { Document = pdoc, UseEXDialog = true })
{
if (pdi.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
pdoc.PrinterSettings = pdi.PrinterSettings;
pdoc.PrintPage += Pdoc_PrintPage;
foreach (var file in files)
{
pdoc.DocumentName = file;
pdoc.Print();
}
}
}
}
//Dispose the file after printing.
foreach(var file in files)
{
Image.FromFile(file).Dispose();
File.Delete(file); //This line gives an exception
}
foreach (DirectoryInfo dir in info.GetDirectories())
{
dir.Delete(true);
}
return true;
}
catch (Exception ex)
{
return false;
}
}
private static void Pdoc_PrintPage(object sender, PrintPageEventArgs e)
{
string file = ((PrintDocument)sender).DocumentName;
System.Drawing.Image img = System.Drawing.Image.FromFile(file);
Rectangle m = e.MarginBounds;
if ((double)img.Width / (double)img.Height > (double)m.Width / (double)m.Height) // image is wider
{
m.Height = (int)((double)img.Height / (double)img.Width * (double)m.Width);
}
else
{
m.Width = (int)((double)img.Width / (double)img.Height * (double)m.Height);
}
e.Graphics.DrawImage(img, m);
}

The issue lies in your Pdoc_PrintPage method. You're using the following line to read the file:
System.Drawing.Image img = System.Drawing.Image.FromFile(file);
The docs for FromFile state:
The file remains locked until the Image is disposed.
So really you should write your code like this, so that the image is disposed of (and the file unlocked) after you're done with it:
string file = ((PrintDocument)sender).DocumentName;
using (System.Drawing.Image img = System.Drawing.Image.FromFile(file))
{
Rectangle m = e.MarginBounds;
if ((double)img.Width / (double)img.Height > (double)m.Width / (double)m.Height) // image is wider
{
m.Height = (int)((double)img.Height / (double)img.Width * (double)m.Width);
}
else
{
m.Width = (int)((double)img.Width / (double)img.Height * (double)m.Height);
}
e.Graphics.DrawImage(img, m);
}
Note that you have to dispose of the same image instance. You currently have this code in your delete loop:
Image.FromFile(file).Dispose();
That's simply trying to load a second copy of the file and then immediately dispose of it. Once you have implemented the above change, you should also remove this line from your delete loop.

How do I center an image when I am merging it on to another image?

I found some code online to merge images. I set it up and worked it out. I finally got it to work but the images that I am merging onto the blank image is not centered.
Here is the how it looks:
Here is my code:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
}
private void btnSelectImage_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.InitialDirectory = Convert.ToString(Environment.SpecialFolder.MyDocuments);
openFileDialog.Filter = "Images (*.jpg, *.jpeg, *.png)|*.*";
openFileDialog.FilterIndex = 1;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
txtFileLoc.Text = openFileDialog.FileName;
System.Drawing.Image img = System.Drawing.Image.FromFile(txtFileLoc.Text);
txtImgWidth.Text = img.Width.ToString();
txtImgHeight.Text = img.Height.ToString();
}
}
private void button1_Click(object sender, EventArgs e)
{
using (var fbd = new FolderBrowserDialog())
{
DialogResult result = fbd.ShowDialog();
if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
{
txtOutputPath.Text = fbd.SelectedPath;
//string[] files = System.IO.Directory.GetFiles(fbd.SelectedPath);
//System.Windows.Forms.MessageBox.Show("Files found: " + files.Length.ToString(), "Message");
}
}
}
private void btnResize_Click(object sender, EventArgs e)
{
DateTime time = DateTime.Now;
string format = "MMMddyyy";
string imgdate = time.ToString(format);
int Height = Convert.ToInt32(txtNewHeight.Text);
int Width = Convert.ToInt32(txtNewWidth.Text);
Image resultImage = new Bitmap(Height, Width, PixelFormat.Format24bppRgb);
using (Graphics grp = Graphics.FromImage(resultImage))
{
grp.FillRectangle(
Brushes.White, 0, 0, Width, Height);
resultImage.Save(txtOutputPath.Text + #"\" + imgdate + ".jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
Image img = Image.FromFile(txtFileLoc.Text);
}
Image playbutton;
try
{
playbutton = Image.FromFile(txtFileLoc.Text);
}
catch (Exception ex)
{
return;
}
Image frame;
try
{
frame = resultImage;
}
catch (Exception ex)
{
return;
}
using (frame)
{
using (var bitmap = new Bitmap(Width, Height))
{
using (var canvas = Graphics.FromImage(bitmap))
{
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
canvas.DrawImage(frame,
new Rectangle(0,
0,
Width,
Height),
new Rectangle(0,
0,
frame.Width,
frame.Height),
GraphicsUnit.Pixel);
canvas.DrawImage(playbutton,
(bitmap.Width / 2) - (playbutton.Width / 2),
(bitmap.Height / 2) - (playbutton.Height / 2));
canvas.Save();
}
try
{
bitmap.Save(txtOutputPath.Text + #"\" + imgdate + ".png", System.Drawing.Imaging.ImageFormat.Png);
}
catch (Exception ex) { }
}
}
}
}

In order to center an image when drawing on top of another image you need to calculate the position of an image (X,Y) which can be done as following:
int x = (bitmap.Width - image.Width) / 2;
int x = (bitmap.Height - image.Height) / 2;
Then you can just draw your image with
canvas.DrawImage(image, x, y, image.Width, image.Height);
Notice, this approach allows you to center an image regardless of whether it's smaller than the original bitmap or larger. When calculating the (X,Y) an one pixel rounding inaccuracy may occur so it would be beneficial to use Math.Round to correct that.

Obtain full-page screenshot from WebBrower component

I am attempting to capture a full-page screenshot of any website a user is viewing using the WebBrowser component.
At present, I am able to only able to capture what a user is viewing from within the WebBrowser. However, the screenshot image created is the size of the webpage. For example, below is a (half-sized) screenshot of the BBC website, the black area is actually saved transparent but I've filled it black for visibility.
I have seen solutions where a new WebBrowser instance is used to fetch a fullpage snapshot. However, I need the screenshot to be exactly of the page as the user is viewing it at the time, much like how the full-page screenshot works in Firefox.
My code below that generated the above image:
private void button1_Click(object sender, EventArgs e)
{
while (webBrowser1.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
int scrollWidth = 0;
int scrollHeight = 0;
scrollHeight = webBrowser1.Document.Body.ScrollRectangle.Height;
scrollWidth = webBrowser1.Document.Body.ScrollRectangle.Width;
webBrowser1.Size = new Size(scrollWidth, scrollHeight);
Bitmap bm = new Bitmap(scrollWidth, scrollHeight);
webBrowser1.DrawToBitmap(bm, new Rectangle(0, 0, bm.Width, bm.Height));
bm.Save(#"D:\Screenshots\test.png", ImageFormat.Png);
}

I've got a good working one..
private void button1_Click(object sender, EventArgs e)
{
using (FileDialog fd = new SaveFileDialog())
{
fd.Filter = "Image (*.png)|*.png";
if (fd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
new WebPageSnap(webBrowser1.Url.ToString(), fd.FileName);
//might take 3 or 4 seconds to save cauz it has to load again.
}
}
}
class WebPageSnap
{
WebBrowser wb;
string outFile;
public WebPageSnap(string url, string outputFile)
{
wb = new WebBrowser();
wb.ProgressChanged += wb_ProgressChanged;
outFile = outputFile;
wb.ScriptErrorsSuppressed = true;
wb.ScrollBarsEnabled = false;
wb.Navigate(url);
}
void wb_ProgressChanged(object sender, WebBrowserProgressChangedEventArgs e)
{
if (e.CurrentProgress == e.MaximumProgress)
{
wb.ProgressChanged -= wb_ProgressChanged;
try
{
int scrollWidth = 0;
int scrollHeight = 0;
scrollHeight = wb.Document.Body.ScrollRectangle.Height;
scrollWidth = wb.Document.Body.ScrollRectangle.Width;
wb.Size = new Size(scrollWidth, scrollHeight);
Bitmap bitmap = new Bitmap(wb.Width, wb.Height);
for (int Xcount = 0; Xcount < bitmap.Width; Xcount++)
for (int Ycount = 0; Ycount < bitmap.Height; Ycount++)
bitmap.SetPixel(Xcount, Ycount, Color.Black);
wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));
bitmap.Save(outFile, ImageFormat.Png);
}
catch { }
}
}
}
.
;Here's the result
.

Luxand API in Visual Studio 2010?

How can I use Luxand API to get to work in visual studio 2010? I need to detect points of chin in a given face, can I do it with any other API?
I have tried this sample code:
OpenFileDialog openFileDialog1 = new OpenFileDialog();
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
FSDK.CImage image = new FSDK.CImage(openFileDialog1.FileName);
// resize image to fit the window width
double ratio = System.Math.Min((pictureBox1.Width + 0.4) / image.Width,
(pictureBox1.Height + 0.4) / image.Height);
image = image.Resize(ratio);
Image frameImage = image.ToCLRImage();
Graphics gr = Graphics.FromImage(frameImage);
FSDK.TFacePosition facePosition = image.DetectFace();
if (0 == facePosition.w)
MessageBox.Show("No faces detected", "Face Detection");
else
{
int left = facePosition.xc - facePosition.w / 2;
int top = facePosition.yc - facePosition.w / 2;
gr.DrawRectangle(Pens.LightGreen, left, top, facePosition.w, facePosition.w);
FSDK.TPoint[] facialFeatures = image.DetectFacialFeaturesInRegion(ref facePosition);
int i = 0;
foreach (FSDK.TPoint point in facialFeatures)
gr.DrawEllipse((++i > 2) ? Pens.LightGreen : Pens.Blue, point.x, point.y, 3, 3);
gr.Flush();
}
// display image
pictureBox1.Image = frameImage;
pictureBox1.Refresh();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Exception");
}
}
I get this error:
Could not load file or assembly 'xquisite.application.exe' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

what is your settings for your target? Any CPU ? Try x86 for Runtime !
have you add to your app.config <startup useLegacyV2RuntimeActivationPolicy="true"/>
?
These two thinks i forgot, were the reason of my errors which was the same as yours.
here is a piece of my code:
private void DetectFace()
{
var failerCounter = 0;
var cameraHandler = 0;
try
{
const int failerLimit = 2;
int failerLimitFaceDetection = Properties.Settings.Default.NotDetectedLimit;
float similarityMinimum = Properties.Settings.Default.SimilarityLimit;
var r = FSDKCam.OpenVideoCamera(ref CameraName, ref cameraHandler);
if (r != FSDK.FSDKE_OK)
{
MessageBox.Show(StringHelper.ErrorCamera);
}
FSDK.SetFaceDetectionParameters(
Properties.Settings.Default.DetectionHandleArbitaryRotations,
Properties.Settings.Default.DetectionDetermineFaceRotationAngle,
Properties.Settings.Default.DetectionInternalResizeWidth);
FSDK.SetFaceDetectionThreshold(Properties.Settings.Default.DetectionFaceDetectionThreshold);
while (IsFaceDetectionActive)
{
var imageHandle = 0;
if (FSDK.FSDKE_OK != FSDKCam.GrabFrame(cameraHandler, ref imageHandle))
{
Application.Current.Dispatcher.Invoke(delegate { }, DispatcherPriority.Background);
continue;
}
var image = new FSDK.CImage(imageHandle);
var frameImage = image.ToCLRImage();
FaceContent = frameImage;
var gr = Graphics.FromImage(frameImage);
var facePosition = image.DetectFace();
IsFaceDetected = facePosition.w != 0;
if (!IsFaceDetected)
{
if (failerCounter++ > failerLimitFaceDetection)
{
failerCounter = 0;
OnFaceNotDetected();
}
}
// if a face is detected, we detect facial features
if (IsFaceDetected)
{
var facialFeatures = image.DetectFacialFeaturesInRegion(ref facePosition);
SmoothFacialFeatures(ref facialFeatures);
FaceTemplate = image.GetFaceTemplate();
// Similarity = 0.5f -> fin the right value ....
IsFaceRecognized = FaceMetricHandler.LooksLike(FaceTemplate, similarityMinimum).Any();
if (IsFaceRecognized)
{
foreach (var match in FaceMetricHandler.LooksLike(FaceTemplate, similarityMinimum))
{
failerCounter = 0;
GreetingMessage = match.Name;
IsFaceDetectionActive = false;
OnFaceRecognized();
break;
}
}
else
{
if (failerCounter++ > failerLimit)
{
failerCounter = 0;
IsFaceDetectionActive = false;
OnFaceNotRecognized();
}
}
if (IsFaceFrameActive)
{
gr.DrawRectangle(Pens.Red, facePosition.xc - 2*facePosition.w/3,
facePosition.yc - facePosition.w/2,
4*facePosition.w/3, 4*facePosition.w/3);
}
}
else
{
ResetSmoothing();
}
FaceContent = frameImage;
GC.Collect();
Application.Current.Dispatcher.Invoke(delegate { }, DispatcherPriority.Background);
}
}
catch(Exception e)
{
logger.Fatal(e.Message);
InitializeCamera();
}
finally
{
FSDKCam.CloseVideoCamera(cameraHandler);
FSDKCam.FinalizeCapturing();
}
}

BTW, you can use x64 with win64\FaceSDK.NET.dll

c# Bitmap.Save A generic error occurred in GDI+ windows application

I am doing OCR application. I have this error when I run the system which the system will save the picturebox3.image into a folder.
//When user is selecting, RegionSelect = true
private bool RegionSelect = false;
private int x0, x1, y0, y1;
private Bitmap bmpImage;
private void loadImageBT_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog open = new OpenFileDialog();
open.InitialDirectory = #"C:\Users\Shen\Desktop";
open.Filter = "Image Files(*.jpg; *.jpeg)|*.jpg; *.jpeg";
if (open.ShowDialog() == DialogResult.OK)
{
singleFileInfo = new FileInfo(open.FileName);
string dirName = System.IO.Path.GetDirectoryName(open.FileName);
loadTB.Text = open.FileName;
pictureBox1.Image = new Bitmap(open.FileName);
bmpImage = new Bitmap(pictureBox1.Image);
}
}
catch (Exception)
{
throw new ApplicationException("Failed loading image");
}
}
//User image selection Start Point
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
RegionSelect = true;
//Save the start point.
x0 = e.X;
y0 = e.Y;
}
//User select image progress
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
//Do nothing it we're not selecting an area.
if (!RegionSelect) return;
//Save the new point.
x1 = e.X;
y1 = e.Y;
//Make a Bitmap to display the selection rectangle.
Bitmap bm = new Bitmap(bmpImage);
//Draw the rectangle in the image.
using (Graphics g = Graphics.FromImage(bm))
{
g.DrawRectangle(Pens.Red, Math.Min(x0, x1), Math.Min(y0, y1), Math.Abs(x1 - x0), Math.Abs(y1 - y0));
}
//Temporary display the image.
pictureBox1.Image = bm;
}
//Image Selection End Point
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
// Do nothing it we're not selecting an area.
if (!RegionSelect) return;
RegionSelect = false;
//Display the original image.
pictureBox1.Image = bmpImage;
// Copy the selected part of the image.
int wid = Math.Abs(x0 - x1);
int hgt = Math.Abs(y0 - y1);
if ((wid < 1) || (hgt < 1)) return;
Bitmap area = new Bitmap(wid, hgt);
using (Graphics g = Graphics.FromImage(area))
{
Rectangle source_rectangle = new Rectangle(Math.Min(x0, x1), Math.Min(y0, y1), wid, hgt);
Rectangle dest_rectangle = new Rectangle(0, 0, wid, hgt);
g.DrawImage(bmpImage, dest_rectangle, source_rectangle, GraphicsUnit.Pixel);
}
// Display the result.
pictureBox3.Image = area;
** ERROR occuer here!!!!!**
area.Save(#"C:\Users\Shen\Desktop\LenzOCR\TempFolder\tempPic.jpg"); // error line occcur
singleFileInfo = new FileInfo("C:\\Users\\Shen\\Desktop\\LenzOCR\\TempFolder\\tempPic.jpg");
}
private void ScanBT_Click(object sender, EventArgs e)
{
var folder = #"C:\Users\Shen\Desktop\LenzOCR\LenzOCR\WindowsFormsApplication1\ImageFile";
DirectoryInfo directoryInfo;
FileInfo[] files;
directoryInfo = new DirectoryInfo(folder);
files = directoryInfo.GetFiles("*.jpg", SearchOption.AllDirectories);
var processImagesDelegate = new ProcessImagesDelegate(ProcessImages2);
processImagesDelegate.BeginInvoke(files, null, null);
//BackgroundWorker bw = new BackgroundWorker();
//bw.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
//bw.RunWorkerAsync(bw);
//bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
}
private void ProcessImages2(FileInfo[] files)
{
var comparableImages = new List<ComparableImage>();
var index = 0x0;
foreach (var file in files)
{
if (exit)
{
return;
}
var comparableImage = new ComparableImage(file);
comparableImages.Add(comparableImage);
index++;
}
index = 0;
similarityImagesSorted = new List<SimilarityImages>();
var fileImage = new ComparableImage(singleFileInfo);
for (var i = 0; i < comparableImages.Count; i++)
{
if (exit)
return;
var destination = comparableImages[i];
var similarity = fileImage.CalculateSimilarity(destination);
var sim = new SimilarityImages(fileImage, destination, similarity);
similarityImagesSorted.Add(sim);
index++;
}
similarityImagesSorted.Sort();
similarityImagesSorted.Reverse();
similarityImages = new BindingList<SimilarityImages>(similarityImagesSorted);
var buttons =
new List<Button>
{
ScanBT
};
if (similarityImages[0].Similarity > 70)
{
con = new System.Data.SqlClient.SqlConnection();
con.ConnectionString = "Data Source=SHEN-PC\\SQLEXPRESS;Initial Catalog=CharacterImage;Integrated Security=True";
con.Open();
String getFile = "SELECT ImageName, Character FROM CharacterImage WHERE ImageName='" + similarityImages[0].Destination.ToString() + "'";
SqlCommand cmd2 = new SqlCommand(getFile, con);
SqlDataReader rd2 = cmd2.ExecuteReader();
while (rd2.Read())
{
for (int i = 0; i < 1; i++)
{
string getText = rd2["Character"].ToString();
Action showText = () => ocrTB.AppendText(getText);
ocrTB.Invoke(showText);
}
}
con.Close();
}
else
{
MessageBox.Show("No character found!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
#endregion

Since it has been a while, I'm hoping you found your answer, but I'm going to guess that you needed to set the file format when you're saving a jpeg:
area.Save(#"C:\Users\Shen\Desktop\LenzOCR\TempFolder\tempPic.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
Past that, I can't remember if the picturebox control is double buffered or not which could be the problem (if it's not, you might not be able to access it for saving purposes while it is being rendered, but if you make a copy of area before setting the picturebox3.Image property that would fix that issue):
Bitmap SavingObject=new Bitmap(area);
picturebox3.Image=area;
SavingObject.Save(#"C:\Users\Shen\Desktop\LenzOCR\TempFolder\tempPic.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
Anyway, I hope you ended up finding your solution (considering it's been a couple months since this was posted).

This looks like a copy of this question:
c# A generic error occurred in GDI+
Same code, same error, same author.
Can't see any difference. But maybe I'm missing something.