Develop Reference

Access to file denied in C# .NET 3.1 forms

Hello I was writing a basic text editor in C# on visual studio windows form using the .NET framework 3.1 long term support version everything worked fine until I wrote the save file script
Here's the code for "Form1.cs" which is where the open and save file functions reside
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Security.Principal;
namespace Text_Editor
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string locsave;
private void openbtn_Click(object sender, EventArgs e)
{
var identity = WindowsIdentity.GetCurrent();
var principal = new WindowsPrincipal(identity);
if (principal.IsInRole(WindowsBuiltInRole.Administrator) != true)
{
MessageBox.Show("Run as Admin");
System.Windows.Forms.Application.ExitThread();
}
else
{
OpenFileDialog openfile = new OpenFileDialog();
if (openfile.ShowDialog() == DialogResult.OK)
{
var locationArray = openfile.FileName;
string location = "";
locsave = locationArray;
foreach (char peice in locationArray)
{
location = location + peice;
}
var contentArray = File.ReadAllText(location);
string content = "";
label4.Text = location;
foreach (char peice in contentArray)
{
content = content + peice;
}
richTextBox1.Text = content;
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
Console.WriteLine("Test");
}
private void savebtn_Click(object sender, EventArgs e)
{
if (#label4.Text == "")
{
MessageBox.Show("Open a text file first");
}
else
{
StreamWriter outputfile = new StreamWriter(locsave);
outputfile.Write(richTextBox1.Text); //this is where the error occures and it throws the error of access denyed
outputfile.Close();
}
}
}
}
Does anyone have a suggestion about what to do I looked around on google for a solution but it seemed most did not work and some others I did not understand.

c# How to have user select folder and then enter

I am fairly new to C# so i don't know how to attack this problem. I have this code, that generates the form so a pop up box comes up and lets you select the folder the user wants to select. The problem is that after its selected it doesn't give an option to hit enter or hit ok so that the rest of my code can use that folder as a path to execute the remainder of what i want to do.
This is the code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using System.IO;
namespace FolderBrowserDialogSampleInCSharp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void BrowseFolderButton_Click(object sender, EventArgs e)
{
FolderBrowserDialog folderDlg = new FolderBrowserDialog();
folderDlg.ShowNewFolderButton = true;
// Show the FolderBrowserDialog.
DialogResult result = folderDlg.ShowDialog();
if (result == DialogResult.OK)
{
textBox1.Text = folderDlg.SelectedPath;
Environment.SpecialFolder root = folderDlg.RootFolder;
var dir = textBox1.Text;
File.SetAttributes(dir, FileAttributes.Normal);
string[] files = Directory.GetFiles(dir, "*.pdf");
IEnumerable<IGrouping<string, string>> groups = files.GroupBy(n => n.Split('.')[0].Split('_')[0]);
foreach (var items in groups)
{
Console.WriteLine(items.Key);
PdfDocument outputPDFDocument = new PdfDocument();
foreach (var pdfFile in items)
{
Merge(outputPDFDocument, pdfFile);
}
if (!Directory.Exists(dir + #"\Merge"))
Directory.CreateDirectory(dir + #"\Merge");
outputPDFDocument.Save(Path.GetDirectoryName(items.Key) + #"\Merge\" + Path.GetFileNameWithoutExtension(items.Key) + ".pdf");
}
Console.ReadKey();
}
}
private static void Merge(PdfDocument outputPDFDocument, string pdfFile)
{
PdfDocument inputPDFDocument = PdfReader.Open(pdfFile, PdfDocumentOpenMode.Import);
outputPDFDocument.Version = inputPDFDocument.Version;
foreach (PdfPage page in inputPDFDocument.Pages)
{
outputPDFDocument.AddPage(page);
}
}
}
}
What generates the form to come is :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace FolderBrowserDialogSampleInCSharp
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
I'm assuming that i either have to add in a button in the form design as "enter" or "ok."
Could i just have this so that as soon as the user selects the folder and hits ok the program proceeds to store that as the user selected path?

The answer i was searching for:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using System.IO;
namespace FolderBrowserDialogSampleInCSharp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void BrowseFolderButton_Click(object sender, EventArgs e)
{
FolderBrowserDialog folderDlg = new FolderBrowserDialog();
folderDlg.ShowNewFolderButton = true;
// Show the FolderBrowserDialog.
DialogResult result = folderDlg.ShowDialog();
if (result == DialogResult.OK)
{
textBox1.Text = folderDlg.SelectedPath;
Environment.SpecialFolder root = folderDlg.RootFolder;
var dir = textBox1.Text;
File.SetAttributes(dir, FileAttributes.Normal);
string[] files = Directory.GetFiles(dir, "*.pdf");
IEnumerable<IGrouping<string, string>> groups = files.GroupBy(n => n.Split('.')[0].Split('_')[0]);
foreach (var items in groups)
{
Console.WriteLine(items.Key);
PdfDocument outputPDFDocument = new PdfDocument();
foreach (var pdfFile in items)
{
Merge(outputPDFDocument, pdfFile);
}
if (!Directory.Exists(dir + #"\Merge"))
Directory.CreateDirectory(dir + #"\Merge");
outputPDFDocument.Save(Path.GetDirectoryName(items.Key) + #"\Merge\" + Path.GetFileNameWithoutExtension(items.Key) + ".pdf");
}
Console.Read();
Close();
}
}
private static void Merge(PdfDocument outputPDFDocument, string pdfFile)
{
PdfDocument inputPDFDocument = PdfReader.Open(pdfFile, PdfDocumentOpenMode.Import);
outputPDFDocument.Version = inputPDFDocument.Version;
foreach (PdfPage page in inputPDFDocument.Pages)
{
outputPDFDocument.AddPage(page);
}
}
}
}

MessageBox not showing (focused) after SaveFileDialog

For some reason after my SaveFileDialog, my app will never show the MessageBox. Is there something I'm missing? Or is this a threading issue?
I run the application as a Windows Form application using VS 2010 Express.
I do not get any exceptions.
To add: When I step through the code, all seems to go well. Which is weird, so I believe it is a timing issue.
Pointed out by LarsTech and others, the MessageBoxes do show up, however the focus is gone; in other words the MessageBox is pushed behind other windows or minimized. This is a problem.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using System.IO;
namespace SpeedDating
{
class Program
{
[STAThread]
static void Main(string[] args)
{
string filename = "test.test"; // args[0];
string ext = filename.Substring(filename.LastIndexOf('.'));
SaveFileDialog dialog = new SaveFileDialog();
dialog.Title = "SpeedDating App";
dialog.RestoreDirectory = true;
dialog.CheckFileExists = false;
dialog.CheckPathExists = false;
dialog.FileName = DateTime.Now.ToString("yyyyMMdd") + ext;
DialogResult result = dialog.ShowDialog();
if (result == DialogResult.OK && dialog.FileName != "")
{
try
{
FileStream outfs = File.Create(dialog.FileName);
FileStream infs = File.Open(filename, FileMode.Open);
infs.CopyTo(outfs);
infs.Close();
outfs.Close();
}
catch (NotSupportedException ex)
{
MessageBox.Show("Probably removed the original file.");
}
}
else
{
MessageBox.Show("No path found to write to.");
}
MessageBox.Show("I came here and all I got was this louzy printline");
}
}
}

I tried this one and it showed right away:
MessageBox.Show(new Form() { WindowState = FormWindowState.Maximized, TopMost = true }, "You clicked Cancel button", "Cancel");

Try this for your Message Box.
MessageBox.Show(this,"Probably removed the original file.");

I created a new project and pasted your code and it works for me. Make sure you have done a full rebuild before running. Also, with this line:
dialog.FileName = DateTime.Now.ToString(format) + "." + ext;
The dialog box will have a file name to begin with. Therefore, only hitting the cancel button (assuming you don't clear the save dialog first) will trigger the message box. Either way, I got the message box to pop up by failing your IF test either way. Your code looks alright.

Perhaps you should put the SaveFileDialog in a using to ensure its disposal prior to the MessageBox call:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using System.IO;
namespace SpeedDating
{
class Program
{
[STAThread]
static void Main(string[] args)
{
string filename = "test.test"; // args[0];
string ext = filename.Substring(filename.LastIndexOf('.'));
using (SaveFileDialog dialog = new SaveFileDialog())
{
dialog.Title = "SpeedDating App by K.Toet";
dialog.RestoreDirectory = true;
dialog.CheckFileExists = false;
dialog.CheckPathExists = false;
dialog.FileName = DateTime.Now.ToString("yyyyMMdd") + ext;
DialogResult result = dialog.ShowDialog();
if (result == DialogResult.OK && dialog.FileName != "")
{
try
{
FileStream outfs = File.Create(dialog.FileName);
FileStream infs = File.Open(filename, FileMode.Open);
infs.CopyTo(outfs);
infs.Close();
outfs.Close();
}
catch (NotSupportedException ex)
{
MessageBox.Show("Probably removed the original file.");
}
}
else
{
MessageBox.Show("No path found to write to.");
}
}
MessageBox.Show("I came here and all I got was this louzy printline");
}
}
}

How to take screenshot of webpage in C#

I am totally new to C# coding - I am trying to take screen shots of webpages whose URLs are initially picked up form a notepad uploaded on the same form.
As I read through the documentation on the web_browser control in MSDN.. I did arrive at the following code - yet when I run, I only get white screens
I tried uploading a .txt with (google/yahoo URLs as test data in 2 lines)
Can someone please say what more should I take care apart from handling which should get what I want as I read in MSDN.
P.S: pls forgive if I'm terribly wrong in coding style .. as aforesaid I'm just starting my C# coding :)
Code that I tried...
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace MSDN_wbc_tut1
{
public partial class Form1 : Form
{
public int temp = 0;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void FileUploadButton1_Click(object sender, EventArgs e)
{
//once a file is uploaded i want Pgm to read contents & browse them as URLS
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.CheckFileExists = true;
openFileDialog.AddExtension = true;
openFileDialog.Multiselect = true;
//Filtering for Text files alone
openFileDialog.Filter = "text files (*.txt)|*.txt";
//if file is selected we must then do our coding part to proceed hecneforth
if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
//my code to say pgm wat to do once upload done...
//Getting my Chosen file's name
string Fileuploaded = openFileDialog.FileName;
//Read all line opens files - reads till EOF & closes ,prevents a while condition
string[] FileuploadedContent = System.IO.File.ReadAllLines(Fileuploaded);
foreach (string s in FileuploadedContent)
{
NavigateContent(s);
}
}
}
private void NavigateContent(string lineasurl)
{
// Add an event handler that images the document after it loads.
try
{
webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler
(takescreen);
webBrowser1.Navigate(new Uri(lineasurl));
//webBrowser1.Navigate(lineasurl); also works
}
catch (System.UriFormatException)
{
return;
}
}
private void takescreen(object sender, WebBrowserDocumentCompletedEventArgs e)
{
//specifying sample values for image or screenshot size
int x = 600, y = 700;
Bitmap bitmap = new Bitmap(x, y);
webBrowser1.DrawToBitmap(bitmap, new Rectangle(0, 0, x, y));
//to give each screen a unique name - i append some no onto it
temp = temp + 1;
string TempFname = "Screenshotref" + temp.ToString() + "." + "jpg";
bitmap.Save(TempFname);
}
}
}

Get ONLY word count from PDF document

I was hoping to get just the word count from a pdf document programmatically.
I've looked at PDFSharp, but it's awefully bulky for what I want to do. I don't have access to the server, so I can't install acrobat to get to their api's or anything. I'd be willing to do it in iTextSharp or another tool.

iTextSharp has a wonderful PdfTextExtractor object that will get you all of the text (assumming as #Rob A pointed out that its actually stored as text and not images or pure vector). Once you've got all of the text a simple RegEx will give you the word count.
The code below should do it for you. (Tested on iText 5.1.1.0)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using iTextSharp.text.pdf.parser;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string InputFile = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Input.pdf");
//Get all the text
string T = ExtractAllTextFromPdf(InputFile);
//Count the words
int I = GetWordCountFromString(T);
}
public static string ExtractAllTextFromPdf(string inputFile)
{
//Sanity checks
if (string.IsNullOrEmpty(inputFile))
throw new ArgumentNullException("inputFile");
if (!System.IO.File.Exists(inputFile))
throw new System.IO.FileNotFoundException("Cannot find inputFile", inputFile);
//Create a stream reader (not necessary but I like to control locks and permissions)
using (FileStream SR = new FileStream(inputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
//Create a reader to read the PDF
iTextSharp.text.pdf.PdfReader reader = new iTextSharp.text.pdf.PdfReader(SR);
//Create a buffer to store text
StringBuilder Buf = new StringBuilder();
//Use the PdfTextExtractor to get all of the text on a page-by-page basis
for (int i = 1; i <= reader.NumberOfPages; i++)
{
Buf.AppendLine(PdfTextExtractor.GetTextFromPage(reader, i));
}
return Buf.ToString();
}
}
public static int GetWordCountFromString(string text)
{
//Sanity check
if (string.IsNullOrEmpty(text))
return 0;
//Count the words
return System.Text.RegularExpressions.Regex.Matches(text, "\\S+").Count;
}
}
}

You can use a pdf2text tool and then count the words:
tools pdf2text