Display the file from folder in asp.net using c#

try this below code


           protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                try
                {
                        //Pass the Grid view for to display files.
                        DisplayFiles(ref gvFiles);
                }
                catch (Exception ex)
                {

                }
            }
        }

            public DataTable GetAllFilesFromDirectory(string sourcePath)
        {
            System.Data.DataTable dtFiles = new System.Data.DataTable();
            try
            {
                if ((Directory.Exists(sourcePath)))
                {
                    dtFiles.Columns.Add(new System.Data.DataColumn("Name"));
                    dtFiles.Columns.Add(new System.Data.DataColumn("Date"));
                    dtFiles.Columns.Add(new System.Data.DataColumn("Size"));
                    dtFiles.Columns["Size"].DataType = typeof(double);
                    dtFiles.Columns.Add(new System.Data.DataColumn("ConvertedSize"));
                    DirectoryInfo dir = new DirectoryInfo(sourcePath);
                    foreach (FileInfo file in dir.GetFiles("*.*").Where(f => !f.Attributes.HasFlag(FileAttributes.Hidden)).OrderBy(f => f.Name.ToUpper()))
                    {
                        System.Data.DataRow drFile = dtFiles.NewRow();
                        drFile["Name"] = file.Name;
                        drFile["Date"] = file.CreationTime.ToString("MM/dd/yyyy HH:mm");
                        drFile["Size"] = file.Length;
                        drFile["ConvertedSize"] = CalculateFileSize(file.Length);
                        dtFiles.Rows.Add(drFile);
                    }
                }
            }
            catch (Exception ex)
            {

            }
            return dtFiles;
        }

        public void DisplayFiles(ref GridView gv)
        {
            string PathDir ="Your Path";
            string strDirecoryPath = Server.MapPath("~" + PathDir + "/");
            try
            {
                if (Directory.Exists(strDirecoryPath))
                {
                    DataTable dtFiles = GetAllFilesFromDirectory(strDirecoryPath);
                    if (dtFiles != null && dtFiles.Rows.Count > 0)
                    {
                        gvFiles.DataSource = dtFiles;
                        gvFiles.DataBind();
                    }
                    else
                    {
                        gvFiles.DataSource = null;
                        gvFiles.DataBind();
                    }
                }
                else
                {
                    gvFiles.DataSource = null;
                    gvFiles.DataBind();
                }
            }
            catch (Exception ex)
            {

            }
        }