Server-side ease of operation I do not blow, the Earth people know, it is the most annoying than the page refresh, the head was brushed dizzy, and he refreshed, but also triggered the server side of the event (solution: http://skylaugh.cnblogs.com/archive/2006/06 /05/418010.html), now the advent of Ajax, their integration is the inevitable development!
First, the introduction of Ajax in the basic use of ASP.net
1, the introduction of Ajax.dll documents in the project.
Ajax.dll Implement the XMLHttpRequest request server implementation details.. NET project, add a reference to it, you can enter the
The line encapsulates the operation accordingly.
2. Set up Httphandle in Web.config
<add verb= "Post,get" path= "Ajax/*.ashx" type= "Ajax.pagehandlerfactory, Ajax"/>
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>
Second, the introduction of the subject-User login verification
1, foreground HTML:
<form id= "Form1" method= "POST" runat= "Server" action= "" >
<table id= "Table1" cellspacing= "1" cellpadding= "1" width= "+" 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= "Landing" ></TD>
</TR>
</TABLE>
</form>
2, the reference JS file
<script language= "javascript" src= "Login.js" type= "Text/javascript" ></SCRIPT>
<script language= "JavaScript" >
Window.onload = function ()
{
Login=new Login (Testajax);
}
</script>
Login. JS file
Extracting control values
function Getvaluebyid (Pobjid) {
var Obj=document.getelementbyid (Pobjid);
try{
return obj.value;
}catch (e) {
Alert ("Control: +pobjid+" does not exist, or has no Value property);
}
}
function Login (obj)
{
This. obj = obj;
This. Getlogin=function ()
{
var returnvalue;
var Username=getvaluebyid (' txtUserName ');
var Password=getvaluebyid (' Txtpassword ');
if (!username| |! Password
{
Alert (' Please enter your username and password! ');
Return
}
Try
{
Returnvalue=this. Obj. Login (Username,password). value;
}catch (e)
{
Alert (' Login error, please try again later ' or contact the Administrator ');
}
Switch (returnvalue)
{
Case 1:
Alert (' Sorry, the username or password you entered is incorrect or not an administrator! ');
Break
Case 0:
Alert (' Admin login successful! ');
Window.document.location.href ('.. /error.aspx ');
Break
Default
Alert (' Login failed, please try again later or contact the Administrator ' +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)
{
Admin Login Entry
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;
}
Http://skylaugh.cnblogs.com/archive/2006/06/14/426029.html
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