Diamond4Dotnet: Files Browsing in ASP.Net

· Create a User Control as follows.

.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="FileListControl.ascx.cs" Inherits="FileUpload_List.FileListControl" %>

<p>

<asp:Label ID="lblCurrentPath" runat="server"></asp:Label>

</p>

<asp:GridView ID="gvFiles" runat="server" AutoGenerateColumns="False" CellPadding="4"

ForeColor="#333333" GridLines="None" OnPageIndexChanging="gvFiles_PageIndexChanging"

OnRowCommand="gvFiles_RowCommand" OnRowDataBound="gvFiles_RowDataBound">

<asp:TemplateField HeaderText="Name" SortExpression="Name">

<asp:LinkButton runat="server" ID="lbFolderItem" CommandName="OpenFolder" CommandArgument='<%# Eval("Name") %>'></asp:LinkButton>

<asp:Literal runat="server" ID="ltlFileItem"></asp:Literal>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField DataField="FileSystemType" HeaderText="Type" SortExpression="FileSystemType" />

<asp:BoundField DataField="LastWriteTime" HeaderText="Date Modified" SortExpression="LastWriteTime" DataFormatString="{0:dd-MMM-yyyy HH:MM tt}" />

<asp:TemplateField HeaderText="Size" SortExpression="Size" ItemStyle-HorizontalAlign="Right">

<%# DisplaySize((long?) Eval("Size")) %>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

.ascx.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.IO;

namespace FileUpload_List

{

public partial class FileListControl : System.Web.UI.UserControl

{

#region Properties

public string HomeFolder

{

get

{

return ViewState["HomeFolder"] as string;

}

set

{

ViewState["HomeFolder"] = value;

}

public string CurrentFolder

{

get

{

return ViewState["CurrentFolder"] as string;

}

set

{

ViewState["CurrentFolder"] = value;

}

public int PageSize

{

get

{

return gvFiles.PageSize;

}

set

{

gvFiles.PageSize = value;

if (value <= 0)

gvFiles.AllowPaging = false;

else

gvFiles.AllowPaging = true;

}

#endregion

protected void Page_Load(object sender, EventArgs e)

{

if (!Page.IsPostBack)

{

if (string.IsNullOrEmpty(this.HomeFolder) || !Directory.Exists(GetFullyQualifiedFolderPath(this.HomeFolder)))

throw new ArgumentException(String.Format("The HomeFolder setting '{0}' is not set or is invalid", this.HomeFolder));

this.CurrentFolder = this.HomeFolder;

PopulateGrid();

}

private void PopulateGrid()

{

// Get the list of files & folders in the CurrentFolder

var currentDirInfo = new DirectoryInfo(GetFullyQualifiedFolderPath(this.CurrentFolder));

var folders = currentDirInfo.GetDirectories();

var files = currentDirInfo.GetFiles();

var fsItems = new List<FileSystemItemCS>(folders.Length + files.Length);

// Add the ".." option, if needed

if (!TwoFoldersAreEquivalent(currentDirInfo.FullName, GetFullyQualifiedFolderPath(this.HomeFolder)))

{

var parentFolder = new FileSystemItemCS(currentDirInfo.Parent);

parentFolder.Name = "..";

fsItems.Add(parentFolder);

}

foreach (var folder in folders)

fsItems.Add(new FileSystemItemCS(folder));

foreach (var file in files)

{

if (file.Extension != ".aspx" && file.Extension != ".cs")//filtering file with extension

{

fsItems.Add(new FileSystemItemCS(file));

}

gvFiles.DataSource = fsItems;

gvFiles.DataBind();

var currentFolderDisplay = this.CurrentFolder;

if (currentFolderDisplay.StartsWith("~/") || currentFolderDisplay.StartsWith("~\\"))

currentFolderDisplay = currentFolderDisplay.Substring(2);

lblCurrentPath.Text = "Viewing the folder <b>" + currentFolderDisplay + "</b>";

}

protected string DisplaySize(long? size)

{

if (size == null)

return string.Empty;

else

{

if (size < 1024)

return string.Format("{0:N0} bytes", size.Value);

else

return String.Format("{0:N0} KB", size.Value / 1024);

}

private string GetFullyQualifiedFolderPath(string folderPath)

{

if (folderPath.StartsWith("~"))

return Server.MapPath(folderPath);

else

return folderPath;

}

private bool TwoFoldersAreEquivalent(string folderPath1, string folderPath2)

{

// Chop off any trailing slashes...

if (folderPath1.EndsWith("\\") || folderPath1.EndsWith("/"))

folderPath1 = folderPath1.Substring(0, folderPath1.Length - 1);

if (folderPath2.EndsWith("\\") || folderPath2.EndsWith("/"))

folderPath2 = folderPath1.Substring(0, folderPath2.Length - 1);

return string.CompareOrdinal(folderPath1, folderPath2) == 0;

}

#region GridView Event Handlers

protected void gvFiles_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

gvFiles.PageIndex = e.NewPageIndex;

PopulateGrid();

}

protected void gvFiles_RowCommand(object sender, GridViewCommandEventArgs e)

{

if (e.CommandName == "OpenFolder")

{

if (string.CompareOrdinal(e.CommandArgument.ToString(), "..") == 0)

{

var currentFullPath = this.CurrentFolder;

if (currentFullPath.EndsWith("\\") || currentFullPath.EndsWith("/"))

currentFullPath = currentFullPath.Substring(0, currentFullPath.Length - 1);

currentFullPath = currentFullPath.Replace("/", "\\");

var folders = currentFullPath.Split("\\".ToCharArray());

this.CurrentFolder = string.Join("\\", folders, 0, folders.Length - 1);

}

else

this.CurrentFolder = Path.Combine(this.CurrentFolder, e.CommandArgument as string);

PopulateGrid();

}

protected void gvFiles_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

var item = e.Row.DataItem as FileSystemItemCS;

if (item.IsFolder)

{

var lbFolderItem = e.Row.FindControl("lbFolderItem") as LinkButton;

lbFolderItem.Text = string.Format(@"<img src=""{0}"" alt="""" /> {1}", Page.ResolveClientUrl("~/Images/folder.png"), item.Name);

}

else

{

var ltlFileItem = e.Row.FindControl("ltlFileItem") as Literal;

if (this.CurrentFolder.StartsWith("~"))

ltlFileItem.Text = string.Format(@"<a href=""{0}"" target=""_blank"">{1}</a>",

Page.ResolveClientUrl(string.Concat(this.CurrentFolder, "/", item.Name).Replace("//", "/")),

item.Name);

else

ltlFileItem.Text = item.Name;

}

#endregion

}

· Register this user control in your form and use as follows.

<%@ Register Src="FileListControl.ascx" TagName="FileGrid" TagPrefix="uc1" %>

<div>

<uc1:FileGrid ID="grid" runat="server" PageSize="10" HomeFolder="~/Files" />

</div>

You Can Download the Working Code of Files Browsing in ASP.Net From here.