File Uploading using XML

Description

This application is in ASP.NET which will allow you to upload images to an XML file which serves as the database for the uploaded files. You can retrieve these files along their properties from the xml file.

In this application I have made use of asp.net Web controls as well as Html controls. I have used a cascading stylesheet for formatting purpose. Xml file serves as a database for the uploaded files. The upload.aspx file is to upload the images to the database and show.aspx file is to retrieve the files from the database. Apart from this there is mystyle.css file which is a stylesheet and there is upload.xml file which stores all the uploaded files.

Code for upload.aspx:

<%@ Page Language="C#" EnableSessionState="False" %>

<%@ Import Namespace="System" %>

<%@ Import Namespace="System.IO" %>

<%@ Import Namespace="System.Data" %>

<%-- These are the imported namespaces needed to run the guest book --%>

<html>

<head>

<title>Uploading Files.</title>

<script language="C#" runat="server">

//This method is called when the upload button is clicked

public void Submit_Click(Object sender, EventArgs e)

{

//the path to the Xml file which will contain all the data

string dataFile = "db/upload.xml";

try

{

//proceed only if the file is posted

if (file.PostedFile != null)

{

errmess.Text = "";

//Open a FileStream to the Database in read mode

FileStream fin;

fin = new FileStream(Server.MapPath(dataFile), FileMode.Open, FileAccess.Read,

FileShare.ReadWrite);

//Create a DataSet object

DataSet guestData = new DataSet();

//Read data from the Database

guestData.ReadXml(fin);

fin.Close();

//extract the filename from the full file path

string nam = file.PostedFile.FileName;

int i = nam.LastIndexOf("\\");

string newnm = nam.Substring(i);

//Create a new DataRow from the DataSet Schema

DataRow newRow = guestData.Tables[0].NewRow();

//Fill the DataRow with form values

newRow["title"] = title.Text;

newRow["file"] = file.PostedFile.FileName;

newRow["length"] = file.PostedFile.ContentLength.ToString();

newRow["contenttype"] = file.PostedFile.ContentType;

//Add the row to the DataSet

guestData.Tables[0].Rows.Add(newRow);

//Create another filestream to the DataBase file in write mode

FileStream fout;

fout = new FileStream(Server.MapPath(dataFile), FileMode.Open, FileAccess.Write,

FileShare.ReadWrite);

guestData.WriteXml(fout, XmlWriteMode.WriteSchema);

fout.Close();

//Hide the Form Panel

formPanel.Visible = false;

//Display the view Panel

thankPanel.Visible = true;

}

}

catch (Exception edd)

{

//catch any other exception that occur

errmess.Text = "Cannot write to XML file because " + edd.ToString();

}

}

</script>

</head>

<link href="mystyle.css" type="text/css" rel="stylesheet">

<body topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">

<%-- Include a header file 'header.inc' --%>

<!-- #Include File="header.inc" -->

<asp:Label ID="errmess" Text="" Style="color: #FF0000" runat="server" />

<asp:Panel ID="formPanel" runat="server">

<form id="Form1" runat="server" enctype="multipart/form-data" action="upload.aspx">

<table border="0" width="80%" align="Center">

<tr class="rowstyle">

<td>

Title :</td>

<td>

<asp:TextBox class="textstyle" Text="" ID="title" runat="server" />

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="title"

Display="static" runat="server">*</asp:RequiredFieldValidator></td>

</tr>

<tr class="rowstyle">

<td>

File :</td>

<td>

<input type="file" class="textstyle" text="" id="file" runat="server" />

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" ControlToValidate="file"

Display="static" runat="server">*</asp:RequiredFieldValidator></td>

</tr>