c# - 从列表框和文件夹中删除选定的文件

Question

我想从列表框和文件夹中删除选定的文件。现在它只是将其从列表框中删除。现在我希望它也从文件夹中删除。谢谢

    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

如果您的 listBox1.Items 包含您的文件路径，您可以通过取消引用 filepath 简单地传递它并使用 File.Delete 删除它> 像这样:

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);
    }
}

也就是说，如果您使用 FullName 而不是使用 Name 将路径添加到 listBox1:

    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
    }

如果你不想在 listBox1 中不添加全名，你也可以单独存储 Folder 名称，因为它无论如何都不会改变:

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
    }

然后你就可以像这样使用它:

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);
    }
}