I. Introduction to the basic use of Ajax in Asp. Net
1. Introduce the Ajax. dll file in the project.
Ajax. dll implementation XmlHttpRequest request server implementation details .. In the. net project, add a reference to it
The rows are encapsulated.
2. Set HttpHandle in web. config
<HttpHandlers>
<Add verb = "POST, GET" path = "ajax/*. ashx" type = "Ajax. PageHandlerFactory, Ajax"/>
</HttpHandlers>
3. Add some references between <HEAD> and </HEAD> as follows:
<Script src = js/Xml. js> </script>
<Link href = "css/myStyle.css" type = "text/css" rel = "stylesheet">
<Script src = "/HttpForAjax/ajax/common. ashx" type = "text/javascript"> </script>
<Script src = "/HttpForAjax/ajax/Ttyu. AjaxData, HttpForAjax. ashx" type = "text/javascript"> </script>
II. Introduction topic-user login verification
1. Foreground Html:
<Form id = "Form1" method = "post" runat = "server" action = "" onsubmit = "login. GetLogin (); return false;">
<TABLE id = "Table1" cellSpacing = "1" cellPadding = "1" width = "300" border = "1">
<TR>
<TD> </TD>
<TD> <INPUT type = "text" id = "txtUsername"> usename </TD>
</TR>
<TR>
<TD> </TD>
<TD> <INPUT type = "password" id = "txtPassword"> pwd </TD>
</TR>
<TR>
<TD> </TD>
<TD> <INPUT type = "submit" value = "login"> </TD>
</TR>
</TABLE>
</Form>
2. Reference Js files
<SCRIPT language = "javascript" src = "login. js" type = "text/javascript"> </SCRIPT>
<Script language = "javascript">
Window. onload = function ()
{
Login = new Login (testAjax );
}
</Script>
Login. Js File
// Extract the Control Value
Function getValueById (pObjID ){
Var obj = document. getElementById (pObjID );
Try {
Return obj. value;
} Catch (e ){
Alert ("control:" + pObjID + "does not exist, or there is no value attribute ");
}
}
Function Login (obj)
{
This. OBJ = obj;
This. GetLogin = function ()
{
Var returnValue;
Var username = getValueById ('txtusername ');
Var password = getValueById ('txtpassword ');
If (! Username |! Password)
{
Alert ('enter your username and password! ');
Return;
}
Try
{
ReturnValue = this. OBJ. Login (username, password). value;
} Catch (e)
{
Alert ('logon error, please try again later or contact the postmaster ');
}
Switch (returnValue)
{
Case 1:
Alert ('Sorry, the user name or password you entered is incorrect or it is not an administrator! ');
Break;
Case 0:
Alert ('administrator logon successful! ');
Specified parameter Doc ument. location. href ('../Error. aspx ');
Break;
Default:
Alert ('logon failed. Please try again later or contact the postmaster '+ returnValue );
Break;
}
}
}
3.. cs File
Private void Page_Load (object sender, System. EventArgs e)
{
Ajax. Utility. RegisterTypeForAjax (typeof (testAjax ));
}
[Ajax. AjaxMethod ()]
Public int Login (string username, string password)
{
// Administrator Logon Portal
Action. Common. CDB cdb = new Action. Common. CDB ();
If ("admin" = cdb. ExeScalar ("select upower from users where
Uname = '"+ username +"' and upwd = '"+ password + "'"))
Return 0;
Else
Return 1;
}
Original post: http://www.cnblogs.com/skylaugh/archive/2006/06/14/426029.aspx
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