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How to read the list of files in a directory on another drive in web app?

Here is a part of a simple web page to show a selector list of the available log files on an attached drive:
public void OnGet()
{
StringBuilder logContent = new StringBuilder();
string[] files = null;
string directory = #"Q:\logs";
string reason = "Undefined";
try
{
files = Directory.GetFiles(directory, "*.csv");
}
catch (Exception ex)
{
reason = ex.Message;
}
if (files != null && files.Length > 0)
{
logContent.Append(#"<select>");
foreach (string file in files)
{
string aFile = file.Substring(file.LastIndexOf(Path.DirectorySeparatorChar) + 1);
logContent.Append("<option value=\"" + aFile + "\">" + aFile + "</option>");
}
logContent.Append(#"</select>");
...
else
{
logContent.Append("<h3>An Exception occurred: " + reason + "</h3>");
}
Message = logContent.ToString();
}
When the page runs, I get the exception
"Cannot find a part of the path Q:\logs.
The drive is there and if I do a dir Q:\logs in the command prompt from C drive it displays the contents.
What am I missing here?

What are you using IIS?
If so, then the user that is running the application (application pool in IIS) has to be you. Otherwise, you need to map the drive for that user, since it sounds like Q is a network mapped drive.

Accessing USB Drives from 'Computer'

I'm trying to copy files over from the desktop to a USB drive programmatically. However, when trying to run this code, I am geting an error stating that part of the path could not be found:
if (dr == DialogResult.Yes)
{
string selected = comboBox1.GetItemText(comboBox1.SelectedItem);
string filePath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
string filefolder = #"\UpgradeFiles";
string fileLocation = filePath + filefolder;
if (!Directory.Exists(fileLocation))
{
Directory.CreateDirectory(fileLocation);
}
else if (Directory.Exists(fileLocation))
{
DirectoryInfo di = new DirectoryInfo(fileLocation);
FileInfo[] fileList = di.GetFiles();
foreach (FileInfo file in fileList)
{
string DrivePath = Environment.GetFolderPath(
Environment.SpecialFolder.MyComputer);
string CopyToDrive = comboBox1.Text;
file.CopyTo(DrivePath + CopyToDrive, false);
}
}
}
The combobox contains the selected drive letter. Am I approaching this wrong when trying to add "computer\driveletter"?

Your File.CopyTo(DrivePath + CopyToDrive, false) should be:
File.CopyTo(CopyToDrive + File.Name, false);
but with a bit of syntactic sugar like using Path.Combine or String.Format instead of just "+".
The issue is that File.CopyTo requires both the directory AND filename of the end location, when you're just providing the directory. This can be seen in the documentation for the method call here: https://msdn.microsoft.com/en-us/library/f0e105zt(v=vs.110).aspx

Delete a folder whose items are open in browser

sdel = Server.MapPath("~/Media_Extracted_Content" + "/" + sfolder);
Directory.Delete(sdel,true);
'sfolder' contains different sub folder and all sub folder have contains different items. All items like image file, audio file, video file opened in browser .I am copying that items from this existing location to new location and after that I have to delete this directory from my system. Whenever I am trying to to this it shows error that Directory is not empty. Also, when I am trying to delete individual items from sub folder it is showing error that this file is being used by another process. Please help me.

I think at Server or at Hosting you have not given the permision to the folder which are, allow READ and WRITE to the Folder.

Please Try This Two FUNCTION/Method.
You only have to do is paste both function in class file(eg class1.cs).
In (aspx.cs)Assign Value to source and destination
For Example source = Server.MapPath("~/Media_Extracted_Content/" + sourcefolder);
destination = Server.MapPath("~/Media_Extracted_Content/" + destinationfolder);
And Call classobject.MoveFiles(source, destination,true);
public void createfolder(string directorypath)
{
// CREATE folder
try
{
Directory.CreateDirectory(directorypath);
}
catch (Exception ex)
{ }
}
public void MoveFiles(string source, string destination, bool overwrite)
{
System.IO.DirectoryInfo inputDir = new System.IO.DirectoryInfo(source);
System.IO.DirectoryInfo outputDir = new System.IO.DirectoryInfo(destination);
try
{
if ((inputDir.Exists))
{
if (!(outputDir.Exists))
{
createfolder(destination);
// outputDir.Create();
}
//Get Each files and copy
System.IO.FileInfo file = null;
foreach (System.IO.FileInfo eachfile in inputDir.GetFiles())
{
file = eachfile;
if ((overwrite))
{
file.CopyTo(System.IO.Path.Combine(outputDir.FullName, file.Name), true);
}
else
{
if (((System.IO.File.Exists(System.IO.Path.Combine(outputDir.FullName, file.Name))) == false))
{
file.CopyTo(System.IO.Path.Combine(outputDir.FullName, file.Name), false);
}
}
System.IO.File.Delete(file.FullName);
}
//Sub folder access code
System.IO.DirectoryInfo dir = null;
foreach (System.IO.DirectoryInfo subfolderFile in inputDir.GetDirectories())
{
dir = subfolderFile;
//Destination path
if ((dir.FullName != outputDir.ToString()))
{
MoveFiles(dir.FullName, System.IO.Path.Combine(outputDir.FullName, dir.Name), overwrite);
}
System.IO.Directory.Delete(dir.FullName);
}
}
}
catch (Exception ex)
{
}
}

Deleting a specific folder and it's files ASP.NET

Alright so I'm having a bit of an issue here. I'm trying to delete a specific folder inside another folder on my webserver using ASP.NET (C#) The folder being deleted is based on a textbox.
The directory is like this
/images/folderx
folderx = txtDelFolder.Text;
The problem is that everything I try deletes every single thing inside the images folder. I'm guessing that it is not recognizing my folder in the filepath
string path = #"\httpdocs\images\ +
txtDelFolder.Text;
I have also tried
string path = #"\httpdocs\images\ +
txtDelFolder.Text + "\";
Tried all this with both single '\' and double '\'
Would appreciate any help on this
Also where it says <directfilepath> I actually have the filepath typed out, just didn't want to share that here.
****edit****
string path = Server.MapPath("~/imagestest/" + txtEditTitle.Text);
if(Directory.Exists(path))
{
DeleteDirectory(path);
}
}
}
private void DeleteDirectory(string path)
{
foreach(string filename in Directory.GetFiles(path))
{
File.Delete(filename);
}
foreach(string subfolders in Directory.GetDirectories(path))
{
Directory.Delete(subfolders, true);
}
}

Try this:
private void DeleteFiles(string folder)
{
string path=Server.MapPath("~/httpdocs/images/" + folder);
string[] files=Directory.GetFiles(path, "*", SearchOption.AllDirectories);
foreach (string file in files)
{
File.Delete(file);
}
//then delete folder
Directory.Delete(path);
}

try this one :
public void DeleteFolder(string folderPath)
{
if (!Directory.Exists(folderPath))
return;
// get the directory with the specific name
DirectoryInfo dir = new DirectoryInfo(folderPath);
try
{
foreach (FileInfo fi in dir.GetFiles())
fi.Delete();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

Don't see why this wouldn't work:
public static bool DeleteDirectory(string input)
{
if (Directory.Exists(input))
{
Directory.Delete(input, true);
return !Directory.Exists(input);
}
else
return true;
}
string thePath = Server.MapPath(#"~/images/");
thePath = Path.Combine(Path.GetFullPath(thePath), txtInput.Text);
if(DeleteDirectory(thePath))
Console.WriteLine("YAY");
else
Console.WriteLine("BOO");

C# unload image from imagebox

I have a method whit the following logic:
I delete all files from input and output folders
user selects an initial picture
this pictures as being assigned to imageBox1
picture is being copied to the folder input
magic happens to picture and I put it to the folder output
new picture from output is beign assigned to imageBox2
Here is where problem starts. When users wants to repeat operation imagebox1 and imagebox2 do have pictures assigned to them. And the step #0 failswith error
The process cannot access the file '03933.tiff' because it is being used by another process.
What I was trying is :
private void CopyImage_Click(object sender, EventArgs e)
{
string currentPath = Directory.GetCurrentDirectory();
string pathInput = currentPath + "\\Input";
string pathOutput = currentPath + "\\Output";
if (pictureBoxInput.Image != null) {
pictureBoxInput.Image = null;
pictureBoxInput.Dispose();
}
if (pictureBoxOutput.Image != null) {
pictureBoxOutput.Image = null;
pictureBoxOutput.Dispose();
}
System.IO.DirectoryInfo di = new DirectoryInfo(pathInput + "\\");
foreach (FileInfo file in di.GetFiles())
{
file.Delete();
}
System.IO.DirectoryInfo dia = new DirectoryInfo(pathOutput + "\\");
foreach (FileInfo file in dia.GetFiles())
{
file.Delete();
}
But still having the same error when program tries to delete files.

I would suggest changing:
if (pictureBoxInput.Image != null) {
pictureBoxInput.Image = null;
pictureBoxInput.Dispose();
}
to:
if (pictureBoxInput.Image != null) {
var existingFile = pictureBoxInput.Image;
pictureBoxInput.Image = null;
existingFile?.Dispose();
}
and the same for pictureBoxOutput
The issue is that your existing code is disposing the wrong thing - you are disposing the PictureBox rather than the Image (and the Image is the thing that is holding the file lock).