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HTML AJAX to DOT.NET in Different DomainI am looking for an example of ...
- HTML or ASP 3 page using AJAX - ASP.NET 2.0 web service in a different domain HTML or ASP 3 pages passes a string to Web Service and it returns an XML packaged string to the client. _______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. Hello Thom,
TL> I am looking for an example of ... TL> - HTML or ASP 3 page using AJAX See there http://www.dotnetjunkies.com/WebLog/joshuagough/archive/2005/11/21/133916.aspx TL> - ASP.NET 2.0 web service in a different domain What do u mean? --- WBR, Michael Nemtsev [C# MVP]. My blog: http://spaces.live.com/laflour Team blog: http://devkids.blogspot.com/ "The greatest danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it" (c) Michelangelo Thanks for the lead.
_______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. On 21-Feb-2007, Michael Nemtsev <nemt***@msn.com> wrote: Show quote For the record ... this is the sample that I hopped someone could have
pointed me to it runs in FireFox, Internet Explorer, Netscape, and Opera) .... <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>AJAX Calling ASP.NET</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <script type="text/javascript"> // ASP.NET WebService // location - http://www.somedomain.com/Service/HelloWorldString.asmx // namespace - http://www.somedomain.com/service/ // method - HelloWorldString( string strParm ) // HTML page // location - http://www.somedomain.com/sample.html function AjaxRequest( counterName ) { if ( window.XMLHttpRequest ) request = new XMLHttpRequest( ); else if ( window.ActiveXObject ) { request = new ActiveXObject( "Msxml2.XMLHTTP" ); if ( ! request ) request = new ActiveXObject( "Microsoft.XMLHTTP" ); } if ( request ) { var strWork = "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" + "<soap:Body>" + "<helloworldstring xmlns=\"http://www.somedomain.com/service/\">" + "<strParm>" + counterName + "</strParm>" + "</helloworldstring>" +"</soap:Body>" + "</soap:Envelope>" request.onreadystatechange = AjaxResponse ; request.open( "POST", "http://www.somedomain.com/Service/HelloWorldString.asmx", true ); request.setRequestHeader( "Content-Type", "text/xml" ); request.setRequestHeader( "SOAPAction", "http://www.somedomain.com/service/helloworldstring" ); request.send( strWork ); } else alert( "Browser does not support all application features." ); return ; } function AjaxResponse( ) { if ( request.readyState == 4 ) { if ( request.status == 200 ) document.getElementById("divString").innerHTML =request.responseXML.documentElement.getElementsByTagName("countResult")[0].firstChild.data; else alert( "Error - " + request.status + " - " + request.statusText ); } return ; } </script> </head> <body bgcolor="gainsboro"> <table border="2" cellpadding="16" cellspacing="2"> <tr> <td align="center"> <p><br /><b>AJAX Test</b> <form action="javascript:void%200" onclick="AjaxRequest('one');return false"> <button type="submit">Update</button></p> </form> <p><div id="divString"></div> </td> </tr> </table> </body> </html> _______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. Thom Little wrote:
> I am looking for an example of ... Neither is possible. You can't do it using plain HTML, and ASP code is > > - HTML or ASP 3 page using AJAX run on the server, not in the browser. You need to use Javascript. > - ASP.NET 2.0 web service in a different domain Unless you are using a web service to communicate between two servers, you are almost always using a web service in a different domain. > > HTML or ASP 3 pages passes a string to Web Service and it returns an XML > packaged string to the client. > > _______________________________________________ > Thom Little www.tlanet.net Thom Little Associates, Ltd. I seem to be mumbling ... sorry ...
I want to call an ASP.NET web service from an HTML or ASP 3 page that is using JavaScript/AJAX. This call will pass a single string to the web service and the web service will pass a single sting back to the HTML or ASP 3 page to be processed by the JavaScript/AJAX that they contain. The examples I have found to date are HTML/AJAX and the server side is not provided or ASP.NET on both sides where the JavaScript/AJAX is obscured. If I can get this trivial application cycling I will understand how JavaScript/AJAX is wired AND solve the issue FINALLY of being able to call a Web Service from an HTML/JavaScript/AJAX or ASP3/JavaScript/AJAX page that is rendered on ANY browser. For the simplest case assume that the caller and called pages are both in the same domain. I will work out the proxy processing for separated domains later. My objective is to be able to add incremental improvements to existing HTML or ASP 3 pages using AJAX to access new web services. _______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. On 21-Feb-2007, =?ISO-8859-1?Q?G=F6ran_Andersson?= <gu***@guffa.com> wrote: Show quote > > - HTML or ASP 3 page using AJAX > > Neither is possible. You can't do it using plain HTML, and ASP code is > run on the server, not in the browser. You need to use Javascript. > > > - ASP.NET 2.0 web service in a different domain > > Unless you are using a web service to communicate between two servers, > you are almost always using a web service in a different domain. The web service and the code that uses it work independently. You can
pick the client side from one example, and the server side from another, and just change the information that is sent and recieved. If you build a web service in ASP.NET you can browse to it to see the information pages about it. There you see all the methods that it has, exactly what you send to them, and what they return. As AJAX uses HTTP to communicate, you rarely have to care about any proxy settings. If the browser can browse to the service, so can the Javascript that runs in the browser. Thom Little wrote: Show quote > I seem to be mumbling ... sorry ... > > I want to call an ASP.NET web service from an HTML or ASP 3 page that is > using JavaScript/AJAX. This call will pass a single string to the web > service and the web service will pass a single sting back to the HTML or ASP > 3 page to be processed by the JavaScript/AJAX that they contain. > > The examples I have found to date are HTML/AJAX and the server side is not > provided or ASP.NET on both sides where the JavaScript/AJAX is obscured. > > If I can get this trivial application cycling I will understand how > JavaScript/AJAX is wired AND solve the issue FINALLY of being able to call a > Web Service from an HTML/JavaScript/AJAX or ASP3/JavaScript/AJAX page that > is rendered on ANY browser. > > For the simplest case assume that the caller and called pages are both in > the same domain. I will work out the proxy processing for separated domains > later. > > My objective is to be able to add incremental improvements to existing HTML > or ASP 3 pages using AJAX to access new web services. > > _______________________________________________ > Thom Little www.tlanet.net Thom Little Associates, Ltd. > > > On 21-Feb-2007, =?ISO-8859-1?Q?G=F6ran_Andersson?= <gu***@guffa.com> wrote: > >>> - HTML or ASP 3 page using AJAX >> Neither is possible. You can't do it using plain HTML, and ASP code is >> run on the server, not in the browser. You need to use Javascript. >> >>> - ASP.NET 2.0 web service in a different domain >> Unless you are using a web service to communicate between two servers, >> you are almost always using a web service in a different domain. Yes like most things in our business the solution will be obvious and dumb
after it is found. The web service is called correctly from an .aspx page with ... this.lblCount.Text = service.count( "test.counter" ); .... where "service" is a web service proxy containing one method that is "count( )". My HTML/JavaScript/AJAX call to the service is installed on micron.tlanet.net and is currently throwing an error 500 and it looks like .... function Send( ) { var frm = document.forms[0] ; queryString = encodeURIComponent( frm.elements[0].value ); Request( "POST", "http://micron.tlanet.net/Service/CountService.asmx?op=count", true ); return ; } function Request( reqType, url, async ) { if ( window.XMLHttpRequest ) request = new XMLHttpRequest( ); else if ( window.ActiveXObject ) { request = new ActiveXObject( "Msxml2.XMLHTTP" ); if ( ! request ) request = new ActiveXObject( "Microsoft.XMLHTTP" ); } if ( request ) { request.onreadystatechange = Response ; request.open( reqType, url, async ); request.setRequestHeader( "Content-Type", "application/x-www-form-urlencoded; charset=UTF-8" ); request.overrideMimeType( "text/XML" ); request.send( "arbitrary_string" ); } else alert( "Browser does not support all application features." ); return ; } function Response( ) { if ( request.readyState == 4 ) { if ( request.status == 200 ) { alert( request.responseText ); stylizeDiv( getDocInfo( request.responseXML ), document.getElementById( "docDisplay" ) ); } else alert( "Request Status = " + request.status + " = " + request.statusText ); } return ; } If you see the obvious solution to my dumb mistake, pleas point it out. (My current assumption is that "url/method" is incorrectly specified.) _______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. Thom Little wrote:
Show quote > Yes like most things in our business the solution will be obvious and dumb The web service expects a SOAP message that contains what method to > after it is found. > > The web service is called correctly from an .aspx page with ... > > this.lblCount.Text = service.count( "test.counter" ); > ... where "service" is a web service proxy containing one method that is > "count( )". > My HTML/JavaScript/AJAX call to the service is installed on > micron.tlanet.net and is currently throwing an error 500 and it looks like > ... > > function Send( ) > { > var frm = document.forms[0] ; > queryString = encodeURIComponent( frm.elements[0].value ); > Request( "POST", > "http://micron.tlanet.net/Service/CountService.asmx?op=count", true ); > return ; > } > > function Request( reqType, url, async ) > { > if ( window.XMLHttpRequest ) > request = new XMLHttpRequest( ); > else if ( window.ActiveXObject ) > { > request = new ActiveXObject( "Msxml2.XMLHTTP" ); > if ( ! request ) > request = new ActiveXObject( "Microsoft.XMLHTTP" ); > } > if ( request ) > { > request.onreadystatechange = Response ; > request.open( reqType, url, async ); > request.setRequestHeader( "Content-Type", > "application/x-www-form-urlencoded; charset=UTF-8" ); > request.overrideMimeType( "text/XML" ); > request.send( "arbitrary_string" ); > } > else > alert( "Browser does not support all application features." ); > return ; > } > > function Response( ) > { > if ( request.readyState == 4 ) > { > if ( request.status == 200 ) > { > alert( request.responseText ); > stylizeDiv( getDocInfo( request.responseXML ), document.getElementById( > "docDisplay" ) ); > } > else > alert( "Request Status = " + request.status + " = " + request.statusText > ); > } > return ; > } > > If you see the obvious solution to my dumb mistake, pleas point it out. (My > current assumption is that "url/method" is incorrectly specified.) > > _______________________________________________ > Thom Little www.tlanet.net Thom Little Associates, Ltd. invode and the parameters for that method, not just a random string. Browse to the web service to see an example of the input that it expects. Yes I finally realized that.
I have been trying to create the appropriate control information for passing an XML request to the service from an HTML page using JavaScrip/Ajax but continue to get 500 errors. If anyone has an example of passing an appropriately wrapped string in both directions HTML/JavasScript/Ajax to ASP.NET Web Service to HTML/JavaScript/Ajax I think it would be VERY helpful. Specifically it would be XmlHttpRequest to ASP.NET Web Service and back. I think this is the toughest case and when it is cycling every other permutation will just fall into place. _______________________________________________ Thom Little www.tlanet.net Thom Little Associates, Ltd. On 23-Feb-2007, =?ISO-8859-1?Q?G=F6ran_Andersson?= <gu***@guffa.com> wrote: Show quote > The web service expects a SOAP message that contains what method to > invode and the parameters for that method, not just a random string. > > Browse to the web service to see an example of the input that it expects.  |
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