使用Directory.GetFiles访问被拒绝的异常时，如何传递文件夹或文件？

Question

List<string> alltypes = new List<string>();
try
{
    alltypes = Directory.GetFiles(textBox3.Text, "*.*", SearchOption.AllDirectories).ToList();
}
catch (UnauthorizedAccessException)
{

}
if (alltypes.Count > 0)
{
    if (comboBox1.Items.Count > 0)
        comboBox1.Items.Clear();
    comboBox1.Items.Add("Possible Extensions");
    foreach (string ext in alltypes)
    {
        if (!comboBox1.Items.Contains(Path.GetExtension(ext)))
            comboBox1.Items.Add(Path.GetExtension(ext));
    }    
}

When it gets to the catch it just stops, it never continues getting the files so the List alltypes is empty. For example in this case in textBox3.Text the value is c:\\ .

Answer 1

It depends on the rights needed to access the folder. There are too many options. For example it could be set by an active directory. Output your exception in the catch block an check the details.

But in general it can be broken down to: How to request administrator permissions when the program starts?