jquery Access ashx File Sample code _jquery

The. ashx file used to write Web handler. ashx files are similar to. aspx files, which you can use to invoke the HttpHandler class, which eliminates the process of control parsing and page processing for ordinary. aspx pages. is actually a mixed file with HTML and C #.

The. ashx file is suitable for creating data formats for browsers to handle that do not require postback processing, such as for generating dynamic pictures, dynamic text, and so on. Much needs to be used for this type of treatment. This document provides a simple demo that invokes the Ashx file and pastes the source code for the key file.

The following is the source code in the Login.ashx file in demo:

public class Login:ihttphandler {public void ProcessRequest (HttpContext context) {context. 
Response.ContentType = "Application/json"; Get way gets the passed data//string username = context. 
request.querystring["username"]; String Password = context. 

request.querystring["Password"]; Post method gets the passed data string username = context. 
request.form["username"]; String Password = context. 
request.form["Password"]; 
String message = NULL; if (string. 
IsNullOrEmpty (username)) {message = "user name cannot be empty"; Context. Response.Write ("{\" success\ ": False,\" message\ ": \" "+ Message +" \ "}");//This JSON format is very important, otherwise the error function context of jquery will be executed. 
Response.End (); } if (string. 
IsNullOrEmpty (password)) {message = "password cannot be null"; Context. 
Response.Write ("{\" success\ ": False,\" message\ ": \" "+ Message +" \ "}"); Context. 
Response.End (); } if (!string. IsNullOrEmpty (username) &&!string. IsNullOrEmpty (password)) {if (username). 
ToUpper () = = "ADMIN" && password = = "123") {message = "login succeeded"; Context. Response.Write ("{\ "Success\": True,\ "message\": \ "" + Message + "\"} "); 
else {message = "User name or password error"; Context. 
Response.Write ("{\" success\ ": False,\" message\ ": \" "+ Message +" \ "}"); }} context. 

Response.End (); 
public bool IsReusable {get {return false; } 
} 
}

The following is the source code in HTML:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd 
">