Ignore Exceptions

I am currently creating an application which searches through a directory and all its subdirectories for a certain file type and then if found displays this file type in a listbox.

heres my problem however, there are certain directories/subdirectories which i do not have access to so when i run my application i get an UnauthorizedAccessException and so the application fails to complete the search, i was wondering if there was a way i could ignore this exception and just continue the search with the next directory.

I would be very grateful for any help as i have been stuck for a while with no help, and i would appreciate some useful sample code if possible...here is the code i have at the moment....

private void button1_Click(object sender, EventArgs e)
{

try
{
listBox1.Items.Clear();

string[] temp = Directory.GetFiles(@"C:\", "*.drl", SearchOption.AllDirectories);

for (int i = 0; i < temp.Length; i++)
{
listBox1.Items.Add(temp[i]);
}
}

catch (UnauthorizedAccessException)
{
throw;
}

}

yep you can, just run recursively on the directories, and ignore exceptions in the internal recursion

here is my code :

 using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;

namespace RecursiveSearchCS
{
    /// 
    /// Summary description for Form1
    /// 

    public class Form1 : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.Button btnSearch;
        internal System.Windows.Forms.TextBox txtFile;
        internal System.Windows.Forms.Label lblFile;
        internal System.Windows.Forms.Label lblDirectory;
        internal System.Windows.Forms.ListBox lstFilesFound;
        internal System.Windows.Forms.ComboBox cboDirectory;
        /// 
        /// Required designer variable
        /// 

        private System.ComponentModel.Container components = null;

        public Form1()
        {
            // 
            // Required for Windows Form Designer support
            // 
            InitializeComponent();

            // 
            // TODO: Add any constructor code after InitializeComponent call.
            // 
        }

        /// 
        /// Clean up any resources being used.
        /// 

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// 
        /// Required method for Designer support: do not modify
        /// the contents of this method with the code editor.
        /// 

        private void InitializeComponent()
        {
            this.btnSearch = new System.Windows.Forms.Button();
            this.txtFile = new System.Windows.Forms.TextBox();
            this.lblFile = new System.Windows.Forms.Label();
            this.lblDirectory = new System.Windows.Forms.Label();
            this.lstFilesFound = new System.Windows.Forms.ListBox();
            this.cboDirectory = new System.Windows.Forms.ComboBox();
            this.SuspendLayout();
            // 
            // btnSearch
            // 
            this.btnSearch.Location = new System.Drawing.Point(608, 248);
            this.btnSearch.Name = "btnSearch";
            this.btnSearch.TabIndex = 0;
            this.btnSearch.Text = "Search";
            this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
            // 
            // txtFile
            // 
            this.txtFile.Location = new System.Drawing.Point(8, 40);
            this.txtFile.Name = "txtFile";
            this.txtFile.Size = new System.Drawing.Size(120, 20);
            this.txtFile.TabIndex = 4;
            this.txtFile.Text = "*.dll";
            // 
            // lblFile
            // 
            this.lblFile.Location = new System.Drawing.Point(8, 16);
            this.lblFile.Name = "lblFile";
            this.lblFile.Size = new System.Drawing.Size(144, 16);
            this.lblFile.TabIndex = 5;
            this.lblFile.Text = "Search for files containing:";
            // 
            // lblDirectory
            // 
            this.lblDirectory.Location = new System.Drawing.Point(8, 96);
            this.lblDirectory.Name = "lblDirectory";
            this.lblDirectory.Size = new System.Drawing.Size(120, 23);
            this.lblDirectory.TabIndex = 3;
            this.lblDirectory.Text = "Look In:";
            // 
            // lstFilesFound
            // 
            this.lstFilesFound.Location = new System.Drawing.Point(152, 8);
            this.lstFilesFound.Name = "lstFilesFound";
            this.lstFilesFound.Size = new System.Drawing.Size(528, 225);
            this.lstFilesFound.TabIndex = 1;
            // 
            // cboDirectory
            // 
            this.cboDirectory.DropDownWidth = 112;
            this.cboDirectory.Location = new System.Drawing.Point(8, 128);
            this.cboDirectory.Name = "cboDirectory";
            this.cboDirectory.Size = new System.Drawing.Size(120, 21);
            this.cboDirectory.TabIndex = 2;
            this.cboDirectory.Text = "ComboBox1";
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(688, 277);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {

            this.btnSearch,
            this.txtFile,
            this.lblFile,
            this.lblDirectory,
            this.lstFilesFound,
            this.cboDirectory});

            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);

        }
        #endregion

        /// 
        /// The main entry point for the application
        /// 

        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        private void btnSearch_Click(object sender, System.EventArgs e)
        {
            lstFilesFound.Items.Clear();
            txtFile.Enabled = false;
            cboDirectory.Enabled = false;
            btnSearch.Text = "Searching...";
            this.Cursor = Cursors.WaitCursor;
            Application.DoEvents();
            DirSearch(cboDirectory.Text);
            btnSearch.Text = "Search";
            this.Cursor = Cursors.Default;
            txtFile.Enabled = true;
            cboDirectory.Enabled = true;
        }

        private void Form1_Load(object sender, System.EventArgs e)
        {
            cboDirectory.Items.Clear();
            foreach (string s in Directory.GetLogicalDrives())
            {
                cboDirectory.Items.Add(s);
            }
            cboDirectory.Text = "C:\\";
        }

        void DirSearch(string sDir) 
        {
            try	
            {
                foreach (string d in Directory.GetDirectories(sDir)) 
                {
                    foreach (string f in Directory.GetFiles(d, txtFile.Text)) 
                    {
                        lstFilesFound.Items.Add(f);
                    }
                    DirSearch(d);
                }
            }
            catch (System.Exception excpt) 
            {
                Console.WriteLine(excpt.Message);
            }
        }
    }
}