ASP.net uses an object-oriented programming environment, each feature file is a series of classes, creating a asp.net Web page, is creating a new class.
One: How the class was created
The type of the Web page is asp.showpagetype_aspx, by using the "." In the file name of the page. Replaced with "_", the base class is System.Web.UI.Page, which defines most of the features used for the request.
By default, each ASPX page is derived from the page base class.
Instance 1: The type of the Web page is printed with the GetType () method; The BaseType property displays its base class.
<body>
The results of the operation are shown below:
Knowing that asp.net is always converted to a class, adding new functionality to a Web page is like adding a new functional approach to a class, and then we understand the common objects under ASP.net. two, Object 1,response
(inherited from System.Web.HttpResponse)
Role: Send information to the client, and control the sending process.
Instance: Dynamically creating a Web page display in the browser, changing the HTTP header name, and redirecting the client to the specified page.
Common property methods are shown in the following table
Response method |
Description |
| Write () | Output data to the client |
| Redirect () | Booting the client browser to a new web page |
| BinaryWrite () | Output binary data to the client |
| Clear () | Clears all HTML pages in the buffer (buffer=true) |
| End () | Terminate the processing of ASP programs |
| Flush () | Send data out of buffer immediately (buffer=true) |
2,request
(inherited from System.Web.HttpRequest)
Function: Gets the parameters in the information or URL that the user submits in the Web form, and can obtain the client information.
Instance: Gets the client IP address, obtains the browser version and so on.
Common property methods are shown in the following table
Request method |
Description |
| BinaryRead () | Read the data that the client passes by post in binary mode |
Collection |
Description |
| QueryString | Gets the query string that the user submits in the URL string |
| Form | Get data submitted by users in a Web Form |
| Cookies | Get cookie string information in client browser |
| ServerVariables | Getting server-side environment variable information |
| ClientCertificate | Obtaining authentication information for the client browser |
| Browser | Getting information about the client browser |
(inherited from System.Web.httpServerUtility)
Role: Configure the server environment, create COM objects and scripting components, provide access to the server interface, etc.
Property |
Description |
| ScriptTimeout | To set the maximum execution time for a script file (default 90s) |
Method |
Description |
| CreateObject () | To create an ActiveX component that has been registered to the server, an application or Script object |
| HTMLEncode () | Converts a string to HTML format output |
| HtmlDecode () | Instead of HTMLEncode, restore the original string |
| UrlEncode () | Converts a string to a URL's encoded output |
| UrlDecode () | Restore the original string |
| MapPath () | To convert a path to a physical path |
| Execute () | Stop executing the current page, go to the new page execution, return to the original page |
| Transfer () | Stop executing the current page, go to the new page, do not return to the original page |
(inherited from System.Web.SessionState)
Role: Save user's private information on the server side
Property |
Description |
| SessionID |
Store user's SessionID, long Integer, automatically generated by session, with uniqueness |
| Timeout |
Set the duration of a session |
method |
Description |
| Abandon () |
Clear Session Object |
Events |
Description |
| Session_OnStart |
The start event, which is activated whenever a session object is generated |
| Session_OnEnd | End event, which activates when the session object is terminated or invalidated |
(inherited from System.Web.HttpApplication)
Role: Save all user's public information on the server side
Method |
Description |
| Lock | Lock Application Object |
| Unlock | Unlock |
Events |
Description |
| Application_OnStart | The start event, which is activated when the Application object starts |
| Application_OnEnd | An end event that is activated when the Application object ends |
Session and Application instances
protected void Page_Load (object sender, EventArgs e)
{
//application instance, which shows the number of times the page was accessed
application. UnLock ();
Application ["Count"]=convert.toint32 (Application ["Count"]) +1;
Application.Lock ();
Response.Write ("You are the first" + convert.tostring (application["Count") + "Guest");
}
protected void Button1_Click (object sender, EventArgs e)
{
//session instance, reading input information
session["name"] = TextBox1.Text;
Response. Write ("You entered:" +session ["name"]);
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