Many Web sites offer downloadable files. The Web sites I visit most often that take a systematic approach to managing downloadable files are programming sites that offer programs and source code for downloading. Many of these Web sites have a convenient way to display a list of files, along with descriptions and version numbers. The files can be grouped by category, or possibly grouped by whoever uploaded them.
This chapter builds a file repository application. With this application running on a Web server, users can create their own file groups, upload files, and edit the information for each file. Other users can search for files that match specified search criteria, and then download files that turn up. It's a great way to manage user-uploaded files.
In the process of building this application, we'll talk about uploading files to the server, doing file I/O and a number of other things such as using cookies, and doing Form-based authentication. The methods of the application are shown in Table 22.1. This table will act as a handy reference as you use and study the application. Figure 22.1 shows the hierarchy of the files in the application. Note that ShowGroup is a stand-alone page that is meant to be called from other applications.
Table 22.1. The File Repository Application Methods
Method | Listing | Source Code File | Description |
|---|
Page_Load | 22.1 | Default.aspx.cs | This method is called when the default.aspx page is loaded. |
LogOut_Click | 22.1 | Default.aspx.cs | This method is fired when the user clicks the Log Out button. |
Admin_Click | 22.1 | Default.aspx.cs | This method is fired when the user clicks the Admin button. |
Search_Click | 22.1 | Default.aspx.cs | This method is fired when the user clicks the Search button. |
Manage_Click | 22.1 | Default.aspx.cs | This method is fired when the user clicks the Manage button. |
Profile_Click | 22.1 | Default.aspx.cs | This method is fired when the user clicks the Edit Profile button. |
Page_Load | 22.2 | Login.aspx.cs | This method is called when the Login.aspx page is loaded. |
LogUser | 22.3 | Login.aspx.cs | This method attempts to match a user name and password with an entry in the database, or it adds a record for a new user. |
LoginUser_Click | 22.3 | Login.aspx.cs | This method is fired when the user clicks the Login button. |
NewUser_CheckChanged | 22.3 | Login.aspx.cs | This method is fired when the user selects or deselects the New User checkbox. |
BindDataToControls | 22.4 | MngFiles.aspx.cs | This method binds the group and file data to the databound controls. |
Page_Load | 22.5 | MngFiles.aspx.cs | This method is called when the MngFiles.aspx file is loaded. |
AddGroup_Click | 22.5 | MngFiles.aspx.cs | This method is fired when the user clicks the Add Group button. |
Main_Click | 22.5 | MngFiles.aspx.cs | This method is fired when the user clicks the Main Menu button. |
Page_Load | 22.6 | EditFile.aspx.cs | This method is called when the EditFile.aspx page is loaded. |
Main_Click | 22.6 | EditFile.aspx.cs | This method is fired when the user clicks the Main Menu button. |
Cancel_Click | 22.6 | EditFile.aspx.cs | This method is fired when the user clicks the Cancel button. |
Delete_Click | 22.6 | EditFile.aspx.cs | This method is fired when the user clicks the Delete button. |
Save_Click | 22.6 | EditFile.aspx.cs | This method is fired when the user clicks the Save button. |
ShowGroupName | 22.7 | DeleteGroup.aspx.cs | This method shows the group name, which is contained in a session variable. |
Cancel_Click | 22.7 | DeleteGroup.aspx.cs | This method is fired when the user clicks the Cancel button. |
OK_Click | 22.7 | DeleteGroup.aspx.cs | This method is fired when the user clicks the OK button. |
Save_Click | 22.8 | AddFile.aspx.cs | This method is fired when the user clicks the Save button. |
Cancel_Click | 22.8 | AddFile.aspx.cs | This method is fired when the user clicks the Cancel button. |
Main_Click | 22.8 | AddFile.aspx.cs | This method is fired when the user clicks the Main Menu button. |
Main_Click | 22.9 | Search.aspx.cs | This method is fired when the user clicks the Main Menu button. |
PerformSearch_Click | 22.9 | Search.aspx.cs | This method is fired when the user clicks the Perform Search button. |
Page_Load | 22.10 | ShowGroup.aspx.cs | This method is called when the ShowGroup.aspx page is loaded. |
ShowGroupName | 22.10 | ShowGroup.aspx.cs | This method shows the group name, which is contained in a session variable. |
Page_Load | 22.11 | EditProfile.aspx.cs | This method is called when the EditProfile.aspx page is loaded. |
Update_Click | 22.11 | EditProfile.aspx.cs | This method is fired when the user clicks the Update button. |
Cancel_Click | 22.11 | EditProfile.aspx.cs | This method is fired when the user clicks the Cancel button. |
ShowGroupName | 22.11 | EditProfile.aspx.cs | This method shows the group name, which is contained in a session variable. |
