.png)
How To Create A Filebrowser in ASP
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="FileBrowser.aspx.cs" Inherits="FileBrowser" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <h1 class="boxes"> Files on the Server: <asp:Literal ID="litLocation" runat="server" /> </h1> <asp:Panel ID="panFiles" runat="server" CssClass="boxes"> <asp:PlaceHolder ID="myPlaceHolder" runat="server" /> </asp:Panel> <asp:Panel ID="Panel1" runat="server" CssClass="boxes"> <asp:TextBox ID="txtFolder" runat="server"></asp:TextBox> <asp:Button ID="btnNewFolder" runat="server" Text="Create New Folder" OnClick="btnNewFolder_Click" /> </asp:Panel> <asp:Panel ID="panUpload" runat="server" CssClass="boxes"> Choose a file to upload to the server<br /> <asp:FileUpload ID="fupTest" runat="server" Width="400px" /> <br /> <asp:Button ID="btnUpload" runat="server" Text="Upload File" OnClick="btnUpload_Click" /> <p> <asp:Label ID="labMessage" runat="server"></asp:Label> </p> </asp:Panel> </div> </form> </body> </html>
using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.IO; public partial class FileBrowser : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string currentRoot = RetrievePathOfFolderToDisplay(); litLocation.Text = currentRoot; GenerateListing(currentRoot); } /// <summary> /// Displays the content of the specified folder. /// </summary> private void GenerateListing(string rootpath) { // First clear out the place holder myPlaceHolder.Controls.Clear(); // Calculate the path to retrieve folders + files string path = Server.MapPath("") + "/" + rootpath; // Make the "go up a level" link if needed MakeUpOneLevelLink(rootpath); // Get a list of all folders DirectoryInfo dirInfo = new DirectoryInfo(path); DirectoryInfo[] folders = dirInfo.GetDirectories(); // Loop through each folder and display it foreach (DirectoryInfo folder in folders) { DisplayFolder(folder, rootpath); } // Get a list of all the files in current path FileInfo[] files = dirInfo.GetFiles(); // Loop through each file foreach (FileInfo file in files) { DisplayFile(file, rootpath); } } /// <summary> /// Retrieves the path of the folder to be displayed /// </summary> /// private string RetrievePathOfFolderToDisplay() { string localpath = Request.QueryString["local"]; // If no query string, use uploads folder as the root if (localpath == null) return "uploads"; else // Remove the URL encoding necessary for // the querystring return Server.UrlDecode(localpath); } /// <summary> /// Displays the appropriate controls for the passed folder /// </summary> private void DisplayFolder(DirectoryInfo folder, string rootpath) { // Get the folder name without the path string shortfolder = Path.GetFileName(folder.FullName); // Add a folder icon Image img = new Image(); img.ImageUrl = "images/mime_folder.png"; myPlaceHolder.Controls.Add(img); // Add a nonbreakable space LiteralControl space1 = new LiteralControl(" "); myPlaceHolder.Controls.Add(space1); // Add a link to the folder so user can display it HyperLink lnk = new HyperLink(); lnk.Text = shortfolder; // The link for the folder must pass the folder name. // Because the folder name may contain characters that are // not allowed in a querystring, we must URL encode it lnk.NavigateUrl = "FileBrowser.aspx?local=" + Server.UrlEncode(rootpath + "/" + shortfolder); myPlaceHolder.Controls.Add(lnk); // Add a line break LiteralControl br1 = new LiteralControl("<br/>"); myPlaceHolder.Controls.Add(br1); } /// <summary> /// Displays the appropriate controls for the passed file /// </summary> private void DisplayFile(FileInfo file, string rootpath) {// Get the filename without the path string shortname = Path.GetFileName(file.FullName); // Add a file icon Image img = new Image(); img.ImageUrl = GetIconForExtension(file); myPlaceHolder.Controls.Add(img); // Add a nonbreakable space LiteralControl space2 = new LiteralControl(" "); myPlaceHolder.Controls.Add(space2); // Add a link to the file so user can download/view it HyperLink lnk = new HyperLink(); lnk.Text = shortname; lnk.NavigateUrl = Server.UrlDecode(rootpath) + "/" + shortname; myPlaceHolder.Controls.Add(lnk); // Add the file size in kb long kb = file.Length / 1000; LiteralControl size = new LiteralControl(" [" + kb + " KB]"); myPlaceHolder.Controls.Add(size); // Add a line break LiteralControl br2 = new LiteralControl("<br/>"); myPlaceHolder.Controls.Add(br2); } /// <summary> /// Returns the filename of the appropriate icon image file /// based on the extension of the passed file /// </summary> private string GetIconForExtension(FileInfo file) { string image = "images/"; string ext = Path.GetExtension(file.FullName).ToLower(); if (ext == ".txt") image += "mime_text.png"; else if (ext == ".doc") image += "mime_doc.png"; else if (ext == ".pdf") image += "mime_pdf.png"; else if (ext == ".gif" || ext == ".jpg" || ext == ".wmf") image += "mime_image.gif"; else if (ext == ".html" || ext == ".htm") image += "mime_html.gif"; else image += "mime_unknown.png"; return image; } /// <summary> /// Makes the "go up a level" link (if needed for the /// current folder) and adds it to the place holder /// </summary> private void MakeUpOneLevelLink(string currentFolder) { // Get the previous folder (the next one "up" in // the hierarchy) string previousFolder = GetPreviousFolder(currentFolder); // If there is a previous path, add a link to // place holder if (previousFolder != "") { Image imgBack = new Image(); imgBack.ImageUrl = "images/mime_folder.gif"; myPlaceHolder.Controls.Add(imgBack); HyperLink lnkBack = new HyperLink(); lnkBack.Text = ".."; lnkBack.NavigateUrl = "FileBrowser.aspx?local=" + Server.UrlEncode(previousFolder); myPlaceHolder.Controls.Add(lnkBack); LiteralControl br = new LiteralControl("<br/>"); myPlaceHolder.Controls.Add(br); } } /// <summary> /// Gets the previous folder (the next one "up" in the file /// system hierarchy) from the passed path. /// If there was no previous folder, return an /// empty string /// </summary> private string GetPreviousFolder(string path) { int posOfLastSlash = path.LastIndexOf("/"); if (posOfLastSlash < 0) return ""; string stripped = path.Remove(posOfLastSlash); return stripped; } /// <summary> /// Event handler for the upload button for the FileUploader /// </summary> protected void btnUpload_Click(object sender, EventArgs e) { // The location for the uploaded file is current path string path = RetrievePathOfFolderToDisplay(); if (fupTest.HasFile) { string fullname = Server.MapPath(path + "/" + fupTest.FileName); if (System.IO.File.Exists(fullname)) { labMessage.Text = "File already exists - uploaded cancelled"; } else { fupTest.SaveAs(fullname); labMessage.Text = "File successfully uploaded"; // Recreate the file listing to show the // uploaded file GenerateListing(path); } } else { labMessage.Text = "File was not specified"; } } /// <summary> /// Event handler for the create new folder button /// </summary> protected void btnNewFolder_Click(object sender, EventArgs e) { // Get the location for the new folder string folderLocation = RetrievePathOfFolderToDisplay(); string fullPath = Server.MapPath(folderLocation) + "/" + txtFolder.Text; // Create the folder on the server Directory.CreateDirectory(fullPath); // Recreate the file listing to show the new folder GenerateListing(folderLocation); } }
0 comments: