Develop Reference

What is a Win32 Exception the system cannot find the file specified

I have a problem with Process.Start(), i want it to open specified file when I double click on tree node.
This is my code where it should open file
String path = "C:\\Users\\........\\something";
private void treePrica_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
try {
String TreeNodeName = treePrica.SelectedNode.ToString().Replace("TreeNode: ", String.Empty);
MessageBox.Show(this.path + "\\" + TreeNodeName);
Process.Start(this.path + "\\" + TreeNodeName);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
When i double click on any of the nodes containing .txt file it throws exception like this

just use string path = #"c:/something"; and make sure you add the extension to the total path!

Dragging files into rich textbox resutls icon created

I read and tried multiple examples in related postings.
No matter what, the problem remains:
When I drag file into the RichBox, I end up with file icon which I don't want and file name string which I do want.
If I drag 2 or more files, only 1st file icon comes, other files do not bring icons.
The question is: how not to get icon into Rich Box when I drag file into it?
private void RT1_DragDrop(object sender, DragEventArgs e)
{
string s="";
if(e.Data.GetDataPresent(DataFormats.FileDrop))
{
Array a = (Array)e.Data.GetData(DataFormats.FileDrop);
foreach (string s1 in a)
{
RT1.Text = RT1.Text + s1 + "\n";
this.Activate();
OpenFile(s1);
}
}
}
private void OpenFile(string sFile)
{
StreamReader StreamReader1 = new StreamReader(sFile);
RT2.Text = RT2.Text + "\n" + StreamReader1.ReadToEnd();
StreamReader1.Close();
}

How to avoid Filewatcher lock file during System.IO.File.Copy

I had developed a filewatcher program to monitor a folder, if there are any changed of the file, it will copy the file to another folder.
But I found that there will be error message when writing the original file (e.g. file being prcoess by another application...) it seems that the file locked when running [System.IO.File.Copy] copying to another folder.
Is there any solution can avoid the original file locked by the filewatcher/System.IO.File.Copy? Thanks.
The following is my code:
private void fileWatcher_Changed(object sender, System.IO.FileSystemEventArgs e)
{
DateTime lastWriteTime = File.GetLastWriteTime(e.FullPath);
if (lastWriteTime != lastRead)
{
txtLog.Text += e.ChangeType + ": " + e.FullPath + "\r\n";
txtLog.Focus();
txtLog.Select(txtLog.TextLength, 0);
txtLog.ScrollToCaret();
try
{
string myPath = e.FullPath;
string myFile = e.Name;
System.IO.FileInfo myFileInfo = new System.IO.FileInfo(myFile);
string myAttibs = myFileInfo.Attributes.ToString();
System.IO.File.Copy(myPath, #"D:\\Folder\\Output\\" + myFile, true);
lastRead = lastWriteTime;
}
catch (System.IO.IOException ex)
{
System.IO.IOException myex = ex;
}
catch (System.Exception ex)
{
System.Exception myex = ex;
}
}
}

I ran into the same problem. I am not fond of my solution, as it feels hackish. But it works:
FileSystemWatcher fsWatcher = new FileSystemWatcher();
fsWatcher.Created += new FileSystemEventHandler( fsWatcher_Created );
private void fsWatcher_Created( object sender, FileSystemEventArgs e )
{
RaiseFileFoundEvent( e.FullPath );
while ( !TestOpen( e.FullPath ) ) ;
RaiseFileCopyDoneEvent( e.FullPath );
}
private bool TestOpen( string filename )
{
try
{
FileStream fs = new FileStream( filename, FileMode.Open,
FileAccess.Write, FileShare.None );
fs.Close();
return true;
}
catch ( Exception )
{
return false;
}
}
private void RaiseFileFoundEvent( string fullPath )
{
// a file is found, but the copy is not guaranteed to be finished yet.
}
private void RaiseFileCopyDoneEvent( string fullPath )
{
// the file is found, and we know the copy is done.
}

There's not a good way to solve this problem. How should the program behave if you're in the middle of copying the file to a new location when another application wants to write to it?
If you're willing to copy a corrupted file (that was written-to while you were copying), you'll have to write your own Copy method that uses FileShare.ReadWrite.

Image renaming program in C#/.NET

I am working on a .NET program that is intended to iterate through a selected directory and allow the renaming of image files after displaying the images. I feel through my code that around 98% of the program is done, but I used a while loop to wait for the pressing of a button so as to allow for the renaming of the image file. Yet, the while loop freezes the program every time the while loop is iterated.
How can I either system("pause"); like in C++ to have the while loop pause without freezing the program and creating an infinite loop or how can I have the while loop paused automatically until a button is pressed?
Here is a tidbit of the code for the loop:
paused = true;
bool X = false;
label2.Text = "please choose a file name and press next";
//while statement
while (X == false)
{
if (paused == false)
{
//Renames filename
string newFileName = filenameTextbox.Text;
//Adds filename to selected directory where user wishes to send file to
string outputFile = destinationDirectory + "\\" + intCounter + fileNameOfficial;
//Pause statement to move to next operand..
//Copies post iterated file to selected directory
File.Copy(inputFile, outputFile, true);
X = true;
}
}
The code in its entirety is below.
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 System.Collections;
namespace recursionBitches
{
public partial class fileSorter : Form
{
bool paused = true;
public fileSorter()
{
InitializeComponent();
}
private void browseFrom_Click(object sender, EventArgs e)
{
//Warning dialouge for selecting a large file.
MessageBox.Show("Warning, before selecting the origination file, it is important to note that choosing too large of a directory (for example, my documents or 'C://') more than likely will cause this program to freeze. ");
MessageBox.Show("You have been warned");
//Choose the originating dir path. This dir path is to be later sorted using recursion.
//Once the originating dir path is chosen, it is added to the label above the button.
if (fromBrowse.ShowDialog(
) == DialogResult.OK)
{
this.originationLabel.Text = fromBrowse.SelectedPath;
}
}
private void browseTo_Click(object sender, EventArgs e)
{
//Choose the send to dir path. This dir path is to later have the files that are sorted sent to it.
//Once the to dir path is chosen, it is added to the label above the button.
if (toBrowse.ShowDialog(
) == DialogResult.OK)
{
this.sendingLabel.Text = toBrowse.SelectedPath;
}
}
private void sortButton_Click(object sender, EventArgs e)
{
string fileExtension = "*" + fileExtensionTextbox.Text;
//Check from path to ensure they are set to a user defined path.
int intCounter = 1;
if (originationLabel.Text != "From")
{
//Check to path to ensure it is set to a user defined path.
if (sendingLabel.Text != "To")
{
//Recursion stuff...
string sourceDirectory = fromBrowse.SelectedPath;
string destinationDirectory = toBrowse.SelectedPath;
//Sends origination path to function ae this is a function call. its num = 8675309... I think its name is Jenny.
recursiveRecursion(sourceDirectory, destinationDirectory, fileExtension, intCounter);
}
else
{
//Message box that says it is required to
MessageBox.Show("You dun goofed");
}
}
else
{
//Yup, it's a message box.
//That was an unhelpful comment....
/Aalmost as unhelpful as this comment
// This is what happens when I program stoned.
MessageBox.Show("You dun goofed");
}
//Grabs the path of the originating directory.
//After the originating directory path is choosen, send the path to a recursion function
//which will search the folders and sort the files in the dir. path.
}
private void originationLabel_Click(object sender, EventArgs e)
{
MessageBox.Show("Silly user, I am a label. I dont even click");
}
private void sendingLabel_Click(object sender, EventArgs e)
{
MessageBox.Show("Silly user, I am a label. I dont even click");
}
//Recursion function which grabs the directory path, uses a foreach loop to iterate through the files.
//Whilst each file is iterated through, have the recursive function select the files by extension and copy
//the files to another directory chosen by the user.
private void recursiveRecursion(string sourceDirectory, string destinationDirectory, string fileExtension, int intCounter)
{
//Select files Path and stuff
string[] filenames = Directory.GetFiles(sourceDirectory, fileExtension);
//foreach (string directoryName in directoryNames)
string[] directoryNames = Directory.GetDirectories(sourceDirectory);
//dir is the file name, as in for each file name in directory do the thing in this recursion loop thingy.
foreach (string fileName in filenames)
{
try
{
if (File.Exists(fileName))
{
//Don't use recursion. It is a file
//copy files here and stuff.
intCounter++;
//For the destination file ae dir2 to work, I need to get the file name from the file path.
//Currently dir is the file path.
//Enter code here to get the file name from the file path.
//Displays on label name of the file.
this.filesortTextbox.Text = "the file being copied is " + fileName;
//Gets filename from path
string fileNameOfficial = Path.GetFileName(fileName);
//Enters text of filename into filename textbox
filenameTextbox.Text = fileNameOfficial;
//For copying purposes, adds filename to originating directory path.
string inputFile = sourceDirectory + "\\" + fileNameOfficial;
//Assigns image from the origination directory.
Image img = Image.FromFile(inputFile);
// Shows image in the image viewer...
iteratedPicturebox.Image = img;
iteratedPicturebox.Width = img.Width;
iteratedPicturebox.Height = img.Height;
//Allows the user to change file name, after changing filename allows
//user to go to next file to rename. This is awesome for files...
paused = true;
bool X = false;
label2.Text = "Please choose a file name and press next.";
//while statement
while (X == false)
{
if (paused == false)
{
//Renames filename
string newFileName = filenameTextbox.Text;
//Adds filename to selected directory where user wishes to send file to.
string outputFile = destinationDirectory + "\\" + intCounter + fileNameOfficial;
//Pause statement to move to next operand..
//Copies post iterated file to selected directory.
File.Copy(inputFile, outputFile, true);
X = true;
}
}
}
else
{
//This really has an unknown pourpose, admittably keeping here for good luck...
Console.WriteLine("{0} is not a valid file or directory.", fileName);
}
}
catch (Exception e)
{
//What process failed you ask? Good question mate.
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
//Long story short for each directory contained in the list of directories.
//Do the stuff listed in the foreach statement.
foreach (string directoryName in directoryNames)
{
try
{
if (Directory.Exists(directoryName))
{
//If this is a directory, send the thing through itself.
// MessageBox.Show("now going through the "+ directoryName + " directory");
recursiveRecursion(directoryName, destinationDirectory, fileExtension, intCounter);
this.directoryIterated.Text = "The Current Directory The Files Are being copied from is " + directoryName;
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
private void fileExtensionTextbox_TextChanged(object sender, EventArgs e)
{
}
private void label1_Click(object sender, EventArgs e)
{
}
private void directoryIterated_Click(object sender, EventArgs e)
{
MessageBox.Show("I am a label. I don't even click");
this.directoryIterated.Text = "You pressed me.";
}
private void kill_Click(object sender, EventArgs e)
{
Close();
}
private void filesortTextbox_Click(object sender, EventArgs e)
{
MessageBox.Show("I am a label. I don't even click.");
this.directoryIterated.Text = "You pressed me.";
}
private void iteratedPicturebox_Click(object sender, EventArgs e)
{
MessageBox.Show("I am a picture box, I don't even click.");
}
private void nextButton_Click(object sender, EventArgs e)
{
if (paused == false)
{
paused = true;
}
else
{
paused = false;
}
}
}
}

Consider using a BackgroundWorker for your processing loop. This allows you to process this on the background thread and won't freeze your main UI thread (which is what is happening)

Rather than trying to stop execution, I would display a dialog box:
Create form eg: FileRenameDialog.
Add public properties to form you can use to set From: text, etc.
Create instance of form. eg: FileRenameDialog reuseme
Whenever the user needs to make a selection, populate the text in the dialog. eg: reuseme.Source = "The current file being copied...";
Display the dialog to the user as modal eg: var dlgResult = reuseme.ShowDialog(this);
Do what you need to with the result eg: if (dlgResult == DialogResult.OK) {...do stuff with the properties of reuseme...}

C# Windows Forms - Select and Copy Multiple Files w MultiSelect, OpenFileDialog, & FileBrowserDialog

I'm developing a WinForms application using C# with an OpenFileDialog and FileBrowserDialog and I'd like to:
Enable selection of multiple xls files.
After selection is made, Display selected xlsx filenames in textbox
Copy the selected files to a separate directory Consolidated
How can I accomplish this?

Here is sample code:
OpenFileDialog od = new OpenFileDialog();
od.Filter = "XLS files|*.xls";
od.Multiselect = true;
if (od.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string tempFolder = System.IO.Path.GetTempPath();
foreach (string fileName in od.FileNames)
{
System.IO.File.Copy(fileName, tempFolder + #"\" + System.IO.Path.GetFileName(fileName));
}
}

There is MultiSelect property of OpenFileDialog which you need to set to true to allow selecting multiple files.
Here is a code example from MSDN which allows the user to select a multiple number of images and display them in PictureBox controls on a Form:
private void Form1_Load(object sender, EventArgs e)
{
InitializeOpenFileDialog();
}
private void InitializeOpenFileDialog()
{
// Set the file dialog to filter for graphics files.
this.openFileDialog1.Filter =
"Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
"All files (*.*)|*.*";
// Allow the user to select multiple images.
this.openFileDialog1.Multiselect = true;
this.openFileDialog1.Title = "My Image Browser";
}
private void selectFilesButton_Click(object sender, EventArgs e)
{
DialogResult dr = this.openFileDialog1.ShowDialog();
if (dr == System.Windows.Forms.DialogResult.OK)
{
// Read the files
foreach (String file in openFileDialog1.FileNames)
{
// Create a PictureBox.
try
{
PictureBox pb = new PictureBox();
Image loadedImage = Image.FromFile(file);
pb.Height = loadedImage.Height;
pb.Width = loadedImage.Width;
pb.Image = loadedImage;
flowLayoutPanel1.Controls.Add(pb);
}
catch (SecurityException ex)
{
// The user lacks appropriate permissions to read files, discover paths, etc.
MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
"Error message: " + ex.Message + "\n\n" +
"Details (send to Support):\n\n" + ex.StackTrace
);
}
catch (Exception ex)
{
// Could not load the image - probably related to Windows file system permissions.
MessageBox.Show("Cannot display the image: " + file.Substring(file.LastIndexOf('\\'))
+ ". You may not have permission to read the file, or " +
"it may be corrupt.\n\nReported error: " + ex.Message);
}
}
}

Combining both answers, here's the code I came up with to:
Enabling the user to Select Multiple XLSX Files (using MultiSelect, OpenFileDialog, this.OpenFileDialog Properties & FileBrowserDialog)
After selection is made, Display Selected XLSX Filenames in Textbox (by setting textBoxSourceFiles.Text value to sourceFileOpenFileDialog.FileNames)
Copy the Selected Files to a separate Consolidated directory (using foreach loop, System.IO.File.Copy, System.IO.Path.GetFileName, sourceFileOpenFileDialog.FileName)
private void sourceFiles_Click(object sender, EventArgs e)
{
Stream myStream;
OpenFileDialog sourceFileOpenFileDialog = new OpenFileDialog();
this.sourceFileOpenFileDialog.InitialDirectory = "i:\\CommissisionReconciliation\\Review\\";
this.sourceFileOpenFileDialog.Filter = "Excel Files (*.xls;*.xlsx;)|*.xls;*.xlsx;|All Files (*.*)|*.*";
this.sourceFileOpenFileDialog.FilterIndex = 2;
this.sourceFileOpenFileDialog.RestoreDirectory = true;
this.sourceFileOpenFileDialog.Multiselect = true;
this.sourceFileOpenFileDialog.Title = "Please Select Excel Source File(s) for Consolidation";
if (sourceFileOpenFileDialog.ShowDialog() == DialogResult.OK)
{
try
{
if ((myStream = sourceFileOpenFileDialog.OpenFile()) != null)
{
using (myStream)
{
// populates text box with selected filenames
textBoxSourceFiles.Text = sourceFileOpenFileDialog.FileNames;
}
} // ends if
} // ends try
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
} // ends if (sourceFileOpenFileDialog.ShowDialog() == DialogResult.OK)
} // ends public void sourceFiles_Click
private void consolidateButton_Execute_Click(object sender, EventArgs e)
{
string consolidatedFolder = targetFolderBrowserDialog.SelectedPath;
foreach (String file in sourceFileOpenFileDialog.FileNames)
{
try
{
// Copy each selected xlsx files into the specified TargetFolder
System.IO.File.Copy(sourceFileOpenFileDialog.FileName, consolidatedFolder + #"\" + System.IO.Path.GetFileName(sourceFileOpenFileDialog.FileName));
Log("File" + sourceFileOpenFileDialog.FileName + " has been copied to " + consolidatedFolder + #"\" + System.IO.Path.GetFileName(sourceFileOpenFileDialog.FileName));
}
} // ends foreach loop
} // ends void consolidateButton_Execute_Click