如何在用户选择的根文件夹中创建一个包含一些子文件夹的文件夹？

Question

i have this code to create subfolders in the path the user choose

FolderBrowserDialog folderBrs = new FolderBrowserDialog();

        if (folderBrs.ShowDialog() == DialogResult.OK)
        {
            System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(folderBrs.SelectedPath;

            dir.CreateSubdirectory("subfolder1");
            dir.CreateSubdirectory("subfolder2");

        } 

it works fine, but the problem is ir makes the subfolders without the principal folder, so y tried this code

FolderBrowserDialog folderBrs = new FolderBrowserDialog();

        if (folderBrs.ShowDialog() == DialogResult.OK)
        {
            System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(folderBrs.SelectedPath + textBox1.Text.Trim());

            dir.CreateSubdirectory("subfolder1");
            dir.CreateSubdirectory("subfolder2");

        } 

as you can see, the only diference is the textBox addition, but when i type the name it doesn't create the folder, it doesn't anything, but the curios thing is, if i choose an existent folder it creates the folder with the subfolders, but the name of the principal folder is mixed with the name of the existent folder that i choosed

what i am doing wrong? any suggestion?

Answer 1

Here is the code corrected, assuming the selected path exists:

if ( folderBrs.ShowDialog() == DialogResult.OK )
{
  var dir = new DirectoryInfo(folderBrs.SelectedPath);
  dir = dir.CreateSubdirectory(textBox1.Text.Trim());
  dir.CreateSubdirectory("subfolder1");
  dir.CreateSubdirectory("subfolder2");
}

We take an instance of a directory info for the selected path.

Next we create the subfolder from the textbox.

Then we create the two subfolders in it.

Answer 2

Let's create the required path as a string :

string dir = Path.Combine(folderBrs.SelectedPath + textBox1.Text.Trim(),
  "subfolder1",
  "subfolder2");

Then we can create the directory:

Directory.CreateDirectory(dir);

Sure, you can combine both fragments into one:

using System.IO;

...

using (FolderBrowserDialog folderBrs = new FolderBrowserDialog()) {
  if (folderBrs.ShowDialog() == DialogResult.OK) 
    Directory.CreateDirectory(Path.Combine(
      folderBrs.SelectedPath + textBox1.Text.Trim(),
      "subfolder1",
      "subfolfer2" 
    ));   
}