Asp schneller Hinweis

To collect values in a form with method="get",Request.QueryString is used. Information sent from a form with the GET method has limits on the amount of information to send and is visible to everyone (it will be displayed in the browser's address bar) and

To collect values in a form with method="post",Request.Form is used . Information sent from a form with the POST method has no limits on the amount of information to send and is invisible to others.

ASP Cookies

To identify a user,a cookie is often used. A cookie is a small t ext file that is stored on clientmachine that is embeded by the server . Each time the same computer requests a page with a browser, it will send the cookie too..

To create cookies,the Response.Cookies command is used :

<%
Response.Cookies("firstname")="Alex"
Response.Cookies("firstname").Expires="May 10,2002"
%>

Note: BEFORE the <html>,the Response.Cookies command must appear tag!

To retrieve a cookie value,the "Request.Cookies" command is used :

<%
fname=Request.Cookies("firstname")
response.write("Firstname=" & fname)
%>

Einschließlich Akten

With the #include directive,you can insert the content of one ASP file into another ASP file before the server executes it. To create functions, headers, footers, or elements that will be reused on multiple pages,the #include directive is used

Syntax:

or

To indicate a path beginning with a virtual directory,use the virtual keyword. The following line would insert the contents of "header.inc"if a file named "header.inc" resides in a virtual directory named /html:

To indicate a relative path,use the file keyword . A relative path begins with the directory that contains the including file. The following line would insert "header.inc" in your file if you have a file in the html directory, and the file "header.inc" resides in html\headers:

To include a file from a higher-level directory,use the file keyword with the syntax (..\) .

Global.asa

In an ASP application,the Global.asa file is an optional file that can contain declarations of objects, variables, and methods that can be accessed by every page.

Note:Each application can only have one Global.asa file and the Global.asa file must be stored in the root directory of the ASP application.

The Global.asa file can contain only the following:

Session events
Application events
<object> declarations
TypeLibrary declarations
the #include directive

when the application/session starts or application/session ends ,it is necessary to tell the application and session objects in Glogal.asa about the work to be done. The code for this is placed in event handlers. Note: To insert scripts in the Global.asa file, we have to put the subroutines inside the HTML <script> tag,we do not use <% and %>:

<object> Declarations

By using the <object> tag,it is also possible to create objects with session or application scope in Global.asa. Note: The <object> tag should be outside the <script> tag!

Syntax:

TypeLibrary Declarations

The contents of a DLL file corresponding to a COM object is stored in a TypeLibrary. The constants of the COM object can be accessed by including a call to the TypeLibrary in the Global.asa file, and errors can be better reported by the ASP code. You can declare the type libraries in Global.asa if your Web application relies on COM objects that have declared data types in type libraries.

Syntax:

Der Lernabschnitt-Gegenstand

To store information about, or change settings for a user session,the Session object is used. In a particular application,variables stored in the Session object hold information about one single user, and are available to all pages .

Collections

Contents - Holds every item added to the session with script commands
StaticObjects - Holds every object added to the session with the <object> tag, and a given session
Contents.Remove(item/index) - Deletes an item from the Contents collection
Contents.RemoveAll() - Deletes every item from the Contents collection

Properties

CodePage - Sets the code page that will be used to display dynamic content
LCID - Sets the locale identifier that will be used to display dynamic content
SessionID - Returns the session id
Timeout - Sets the timeout for the session

Method

Abandon - Kills every object in a session object

Anwendung Gegenstand

The Response Object is used to send output to the user from the server.

Collection

Cookies(name) - Sets a cookie value. If the cookie does not exist, it will be created, and take the value that is specified

Properties

Buffer - Whether to buffer the output or not. When the output is buffered, the server will hold back the response until all of the server scripts have been processed, or until the script calls the Flush or End method. If this property is set, it should be before the <html> tag in the ASP file
CacheControl - Sets whether proxy servers can cache the output or not. When set to Public, the output can be cached by a proxy server
Charset(charset_name) - Sets the name of the character set (like "ISO8859-1") to the content type header
ContentType - Sets the HTTP content type (like "text/html", "image/gif", "image/jpeg", "text/plain"). Default is "text/html"
Expires - Sets how long a page will be cached on a browser before it expires
ExpiresAbsolute - Sets a date and time when a page cached on a browser will expire
IsClientConnected - Checks if the client is still connected to the server
Pics(pics_label) - Adds a value to the pics label response header
Status - Specifies the value of the status line

Methods

AddHeader(name, value) - Adds an HTML header with a specified value
AppendToLog string - Adds a string to the end of the server log entry
BinaryWrite(data_to_write) - Writes the given information without any character-set conversion
Clear - Clears the buffered output. Use this method to handle errors. If Response.Buffer is not set to true, this method will cause a run-time error
End - Stops processing the script, and return the current result
Flush - Sends buffered output immediately. If Response.Buffer is not set to true, this method will cause a run-time error
Redirect(url) - Redirects the user to another url
Write(data_to_write) - Writes a text to the user

Der Wartegegenstand

When a browser asks for a page from a server, it is called a request. The Request Object is used to get information from the user.

Collection

ClientCertificate - Holds field values stored in the client certificate
Cookies(name) - Holds cookie values
Form(element_name) - Holds form (input) values. The form must use the post method
QueryString(variable_name) - Holds variable values in the query string
ServerVariables(server_variable) - Holds server variable values

Property

TotalBytes - Holds the total number of bytes the client is sending in the body of the request

Method

BinaryRead - Fetches the data that is sent to the server from the client as part of a post request

Um Gegenstand bitten

Wenn eine Datenbanksuchroutine um eine Seite von einem Bediener bittet, wird es einen Antrag genannt. Der Antrag-Gegenstand wird benutzt, um Informationen vom Benutzer zu erhalten.

Ansammlung

ClientCertificate - Einflüsse fangen die Werte auf, die in der Klient Bescheinigung gespeichert werden
Plätzchen (Name) - Einflußplätzchenwerte
Form (element_name) - Einflüsse bilden (Eingang) Werte. Die Form muß die Pfostenmethode verwenden
QueryString (variable_name) - variable Werte der Einflüsse in der Frage Zeichenkette
ServerVariables (server_variable) - Einflußbediener-Variable Werte

Eigenschaft

TotalBytes - Einflüsse die Gesamtzahl Bytes, die der Klient in den Körper des Antrags sendet

Methode

BinaryRead - Reichweiten die Daten, die zum Bediener vom Klienten als Teil eines Pfostenantrags geschickt wird

Bediener-Gegenstand

The Server Object is used to access properties and methods on the server.

Property

ScriptTimeout - Sets how long a script can run before it is terminated

Method

CreateObject(type_of_object) - Creates an instance of an object
Execute(path) - Executes an ASP file from inside another ASP file. After executing the called ASP file, the control is returned to the original ASP file
GetLastError() - Returns an ASPError object that will describe the error that occurred
HTMLEncode(string) - Applies HTML encoding to a string
MapPath(path) - Maps a relative or virtual path to a physical path
Transfer(path) - Sends all of the state information to another ASP file for processing. After the transfer, procedural control is not returned to the original ASP file
URLEncode(string) - Applies URL encoding rules to a string

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