Delete Selected File from Listbox and Folder

Question

I want to Delete the Selected File from Listbox and Folder. For now it's only removing it from the Listbox. Now I want it to be removed also from the Folder. Thanks

    private void tDeletebtn_Click(object sender, EventArgs e)

    {
        if (listBox1.SelectedIndex != -1)
            listBox1.Items.RemoveAt(listBox1.SelectedIndex);
    }

   private void TeacherForm_Load(object sender, EventArgs e)
    {
        DirectoryInfo dinfo = new DirectoryInfo(@"data\\Teachers\\");
        FileInfo[] Files = dinfo.GetFiles("*.xml");
        foreach (FileInfo file in Files)
        {
            listBox1.Items.Add(file.Name);
        }
    }

Answer 1

If your listBox1.Items contains your filepath, you could simply pass it by de-referencing the filepath and delete it using File.Delete like this:

private void tDeletebtn_Click(object sender, EventArgs e)
{
    if (listBox1.SelectedIndex != -1){
        string filepath = listBox1.Items[listBox1.SelectedIndex].ToString();
        if(File.Exists(filepath))
            File.Delete(filepath);            
        listBox1.Items.RemoveAt(listBox1.SelectedIndex);
    }
}

That is, if you add your paths to the listBox1 using FullName instead of using Name:

    DirectoryInfo dinfo = new DirectoryInfo(@"data\\Teachers\\");
    FileInfo[] Files = dinfo.GetFiles("*.xml");
    foreach (FileInfo file in Files)
    {
        listBox1.Items.Add(file.FullName); //note FullName, not Name
    }

If you don't want to not add the full name in the listBox1, you could also store the Folder name separately, since it will not be changed anyway:

string folderName; //empty initialization
.
.
    DirectoryInfo dinfo = new DirectoryInfo(@"data\\Teachers\\");
    FileInfo[] Files = dinfo.GetFiles("*.xml");
    folderName = dinfo.FullName; //here you initialize your folder name
    //Thanks to FᴀʀʜᴀɴAɴᴀᴍ
    foreach (FileInfo file in Files)
    {
        listBox1.Items.Add(file.Name); //just add your filename here
    }

And then you just use it like this:

private void tDeletebtn_Click(object sender, EventArgs e)
{
    if (listBox1.SelectedIndex != -1){
        //Put your folder name here..
        string filepath = Path.Combine(folderName, listBox1.Items[listBox1.SelectedIndex].ToString());
        if(File.Exists(filepath))
            File.Delete(filepath);            
        listBox1.Items.RemoveAt(listBox1.SelectedIndex);
    }
}