Develop Reference

How does the system go backward one path

It's current path is C:\Users\USERNAME\OneDrive\Desktop\Pro\Professional
How do i set it to C:\Users\USERNAME\OneDrive\Desktop\Pro
But I don't set by writing string to set it back I want the system to understand where it is and go backwards.
Simply put I want it to be like the cd.. command in Windows CMD.

To get the current directory, use
var currentDirectory = Directory.GetCurrentDirectory();
To get the parent directory, use
var parentDirectory = Path.GetDirectoryName(currentDirectory);
And finally to set the current directory:
Directory.SetCurrentDirectory(parentDirectory);

There is a method in System.IO called Path.GetDirectoryName. this would take your path as input and return the parent directory of the path which you have given.
example:
string path = "C:\Users\USERNAME\OneDrive\Desktop\Pro\Professional";
string parentDirectory = Path.GetDirectoryName(path);
here, the parentDirectory now containes "C:\Users\USERNAME\OneDrive\Desktop\Pro"
if you want to go up multiple leveles you can call multiple times,
example:
string path = #"C:\Users\USERNAME\OneDrive\Desktop\Pro\Professional";
string parentDirectory = Path.GetDirectoryName(Path.GetDirectoryName(path));
the parentDirectory now containes "C:\Users\USERNAME\OneDrive\Desktop"

File not relocating correctly c#

I have my program setup to rename and store a file according to checkbox input. I used another stackoverflow post for my template. Only problem is when I tried setting it up for sub-folders, it never puts it in the correct folder. I have a label folder with two sub folders called L-Labels and B-Labels. The user checks which label type it is and the file gets renamed and placed in the according sub-folder. When I used breakpoint my variables are getting the correct value so I don't see what's wrong I have provided my variables and code for relocating the file. What is causing this to not put it in my sub-folder?
Varibales:
string oldPath = lblBrowseName.Text;
string newpathB = #"C:\Users\Public\Labels\B_Labels";
string newpathL = #"C:\Users\Public\Labels\L_Labels";
Method:
if (rChkBoxBizerba.Checked == true)
{
string newFileName = rtxtBoxNewVersion.Text;
FileInfo f1 = new FileInfo(oldPath);
if (f1.Exists)
{
if (!Directory.Exists(newpathB))
{
Directory.CreateDirectory(newpathB);
}
f1.CopyTo(string.Format("{0}{1}{2}", newpathB, newFileName, f1.Extension));
if (System.IO.File.Exists(lblBrowseName.Text))
System.IO.File.Delete(lblBrowseName.Text);
}

I would say this is the problem:
f1.CopyTo(string.Format("{0}{1}{2}", newpathB, newFileName, f1.Extension));
You declare your path but it doesn't have a trailing directory separator, so when you combine all the parts, as above, the actual result is invalid.
You really should use Path.Combine() to combine parts of paths together, this uses the correct directory separator and makes additional checks.
Try something like this:
// Build actual filename
string filename = String.Format("{0}{1}",newFileName, f1.Extension));
// Now build the full path (directory + filename)
string full_path = Path.Combine(newpathB,filename);
// Copy file
f1.CopyTo(full_path);

Create directory

I need to create a directory, but, the directory when I need to create is inside of another directory. Something like this:
Directory.CreateDirectory(#"teste\teste\teste\teste\");
basically, this directory does not exist ( of course ), but, the CreateDirectory(...) not support this string style, how I can make to create this directories ?
My way to make this is that:
private void createdir(string _path)
{
string path = string.Empty;
string[] dir = _path.Split('\\');
for(int i=0;i<dir.Length;i++)
{
path += dir[i] + "\\";
Directory.CreateDirectory(path);
}
}
But, I want to know, if have a more better way to make this ( a more legible ) more rapid.

Directory.Create("c:\teste\teste\teste\teste"); should workt

according to MSDN, you can nest the directory . CreateDirectory
Directory.CreateDirectory("Public\\Html");
Directory.CreateDirectory("\\Users\\User1\\Public\\Html");
Directory.CreateDirectory("c:\\Users\\User1\\Public\\Html"); // using verbatim string you can escape slashes
if(System.IO.Directory.Exists(yourPath))
{
Directory.CreateDirectory(yourPath);
}

Directory.CreateDirectory() can be used to create directories and subdirectories as specified by the path.
Here’s an example:
static void Main(string[] args)
{
try
{
Directory.CreateDirectory(#"D:\ParentDir\ChildDir\SubChildDir\");
Console.WriteLine("Directories Created");
Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
Source

My chosen method would be:
DirectoryInfo di = new DirectoryInfo(#"teste\teste\teste\teste\");
di.Create();

Your way is too complicated for this process. You don't have to use Split() method also to create this kind of directories.
You can use it like;
string tempFolderAbsolutePath = #"C:\Temp";
string subFolderRelativePath = #"teste\teste\teste\teste\";
DirectoryInfo tempFolder = new DirectoryInfo( tempFolderAbsolutePath );
DirectoryInfo subFolder = tempFolder.CreateSubdirectory( subFolderRelativePath );
As you can see, this process creates nested subdirectories.

If your current directory is (say C:\) and you want to create a directory as C:\A\B\C, then I think the best way is using
Directory.CreateDirectory(#"\A\B\C");
If you need a directory in another root (say, D:\) then you need to give the full path as
Directory.CreateDirectory(#"D:\A\B\C");
You do not need to have a for loop to create each directory as CreateDirectory does it for you.

If a folder does not exist, create it

I use a FileUploader control in my application. I want to save a file to a specified folder. If this folder does not exist, I want to first create it, and then save my file to this folder. If the folder already exists, then just save the file in it.
How can I do this?

Use System.IO.Directory.CreateDirectory.
According to the official ".NET" docs, you don't need to check if it exists first.
System.io   >   Directory   >   Directory.CreateDirectory
Any and all directories specified in path are created, unless they already exist or unless some part of path is invalid. If the directory already exists, this method does not create a new directory, but it returns a DirectoryInfo object for the existing directory.
        — learn.microsoft.com/dotnet/api/

Use the below code as per How can I create a folder dynamically using the File upload server control?:
string subPath ="ImagesPath"; // Your code goes here
bool exists = System.IO.Directory.Exists(Server.MapPath(subPath));
if(!exists)
System.IO.Directory.CreateDirectory(Server.MapPath(subPath));

Just write this line:
System.IO.Directory.CreateDirectory("my folder");
If the folder does not exist yet, it will be created.
If the folder exists already, the line will be ignored.
Reference: Article about Directory.CreateDirectory at MSDN
Of course, you can also write using System.IO; at the top of the source file and then just write Directory.CreateDirectory("my folder"); every time you want to create a folder.

Directory.CreateDirectory explains how to try and to create the FilePath if it does not exist.
Directory.Exists explains how to check if a FilePath exists. However, you don't need this as CreateDirectory will check it for you.

You can create the path if it doesn't exist yet with a method like the following:
using System.IO;
private void CreateIfMissing(string path)
{
bool folderExists = Directory.Exists(Server.MapPath(path));
if (!folderExists)
Directory.CreateDirectory(Server.MapPath(path));
}

This method will create the folder if it does not exist and do nothing if it exists:
Directory.CreateDirectory(path);

You can use a try/catch clause and check to see if it exist:
try
{
if (!Directory.Exists(path))
{
// Try to create the directory.
DirectoryInfo di = Directory.CreateDirectory(path);
}
}
catch (IOException ioex)
{
Console.WriteLine(ioex.Message);
}

using System.IO
if (!Directory.Exists(yourDirectory))
Directory.CreateDirectory(yourDirectory);

if (!Directory.Exists(Path.GetDirectoryName(fileName)))
{
Directory.CreateDirectory(Path.GetDirectoryName(fileName));
}

The following code is the best line(s) of code I use that will create the directory if not present.
System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath("~/temp/"));
If the directory already exists, this method does not create a new directory, but it returns a DirectoryInfo object for the existing directory. >

Create a new folder, given a parent folder's path:
string pathToNewFolder = System.IO.Path.Combine(parentFolderPath, "NewSubFolder");
DirectoryInfo directory = Directory.CreateDirectory(pathToNewFolder);
// Will create if does not already exist (otherwise will ignore)
path to new folder given
directory information variable so you can continue to manipulate it as you please.

Use this code if the folder is not presented under the image folder or other folders
string subPath = HttpContext.Current.Server.MapPath(#"~/Images/RequisitionBarCode/");
bool exists = System.IO.Directory.Exists(subPath);
if(!exists)
System.IO.Directory.CreateDirectory(subPath);
string path = HttpContext.Current.Server.MapPath(#"~/Images/RequisitionBarCode/" + OrderId + ".png");

Use the below code. I use this code for file copy and creating a new folder.
string fileToCopy = "filelocation\\file_name.txt";
String server = Environment.UserName;
string newLocation = "C:\\Users\\" + server + "\\Pictures\\Tenders\\file_name.txt";
string folderLocation = "C:\\Users\\" + server + "\\Pictures\\Tenders\\";
bool exists = System.IO.Directory.Exists(folderLocation);
if (!exists)
{
System.IO.Directory.CreateDirectory(folderLocation);
if (System.IO.File.Exists(fileToCopy))
{
MessageBox.Show("file copied");
System.IO.File.Copy(fileToCopy, newLocation, true);
}
else
{
MessageBox.Show("no such files");
}
}

A fancy way is to extend the FileUpload with the method you want.
Add this:
public static class FileUploadExtension
{
public static void SaveAs(this FileUpload, string destination, bool autoCreateDirectory) {
if (autoCreateDirectory)
{
var destinationDirectory = new DirectoryInfo(Path.GetDirectoryName(destination));
if (!destinationDirectory.Exists)
destinationDirectory.Create();
}
file.SaveAs(destination);
}
}
Then use it:
FileUpload file;
...
file.SaveAs(path,true);

string root = #"C:\Temp";
string subdir = #"C:\Temp\Mahesh";
// If directory does not exist, create it.
if (!Directory.Exists(root))
{
Directory.CreateDirectory(root);
}
The CreateDirectory is also used to create a sub directory. All you have to do is to specify the path of the directory in which this subdirectory will be created in. The following code snippet creates a Mahesh subdirectory in C:\Temp directory.
// Create sub directory
if (!Directory.Exists(subdir))
{
Directory.CreateDirectory(subdir);
}

Derived/combined from multiple answers, implementing it for me was as easy as this:
public void Init()
{
String platypusDir = #"C:\platypus";
CreateDirectoryIfDoesNotExist(platypusDir);
}
private void CreateDirectoryIfDoesNotExist(string dirName)
{
System.IO.Directory.CreateDirectory(dirName);
}

How Can I Remove The 'file:\\' From the Return Value of Path.GetDirectoryName() in C#

string path = Path.GetDirectoryName(
Assembly.GetAssembly(typeof(MyClass)).CodeBase);
output:
file:\d:\learning\cs\test\test.xml
What's the best way to return only d:\learning\cs\test\test.xml
file:\\ will throw exception when I call doc.Save(returnPath) ,however doc.Load(returnPath); works well. Thank you.

string path = new Uri(Assembly.GetAssembly(typeof(MyClass)).CodeBase).LocalPath;

If you want the directory of the assembly of that class, you could use the Assembly.Location property:
string path = Path.GetDirectoryName(Assembly.GetAssembly(typeof(MyClass)).Location);
This isn't exactly the same as the CodeBase property, though. The Location is the "path or UNC location of the loaded file that contains the manifest" whereas the CodeBase is the " location of the assembly as specified originally, for example, in an AssemblyName object".

System.Uri uri = new System.Uri(Assembly.GetAssembly(typeof(MyClass)).CodeBase);
string path = Path.GetDirectoryName(uri.LocalPath);

My first approach would be like this...
path = path.Replace("file://", "");

use the substring string method to grab the file name after file:\