ASP.NET AJAX Beta 1 and AutoCompleteExtender

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ASP.NET AJAX Beta 1 and AutoCompleteExtender

Last post 11-02-2006 10:27 AM by Luis Abreu. 15 replies.

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ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-24-2006, 4:26 PM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

Have follow page:

1    <%@ Register TagPrefix="ajaxPreview" Namespace="Microsoft.Web.Preview.UI.Controls" Assembly="Microsoft.Web.Preview" %>
2    
3    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
4    
5    <html xmlns="http://www.w3.org/1999/xhtml" >
6    <head id="Head1" runat="server">
7    <title>test autocomlete</title>
8    </head>
9    <body>
10       <script language="javascript">
11       function onClick()
12       {    
13       SearchService.GetAutoCompleteList("a",10, function(a1){alert(a1);} );
14       }
15       
16       
17       </script>
18       <form id="form1" runat="server" defaultfocus="UserNameTextBox">
19           <asp:ScriptManager ID="MainScriptManager" runat="server" >     
20               <Services>
21                   <asp:ServiceReference Path="~/Services/SearchService.asmx"  />
22               </Services>
23           </asp:ScriptManager>
24           
25           <input type="button" id="btn" value="custom call" onclick="onClick();" />
26           <asp:TextBox ID="tbSearch" runat="server" /><br /><br />
27           
28           <ajaxPreview:AutoCompleteExtender ID="extSearchAutoCompleteExtender" runat="server" 
29               MinimumPrefixLength="1" Visible="true"
30               ServicePath="~/Services/SearchService.asmx" 
31               ServiceMethod="GetAutoCompleteList" 
32               TargetControlID="tbSearch"  />
33       </form>
34   </body>
35   </html>
36

and service:

[WebService]
[ScriptService] 
public class SearchService : WebService {

    [WebMethod]
    [ScriptMethod(true)]
    public string[] GetAutoCompleteList(string PrefixText, int count)
    {
       ...
    }    
}

When i press button - it works. But AutoCompleteExtender not work.
I debug internal JS Code. it seems that Request to server was send in JSON format, but not parsed on server properly, and call not come to Service.
I set breakpoint in service - it never come to it when use AutoCompleteExtender. But in Fiddler i can see that request goes to server.

in Jule CTP same code was works fine.

In anywherein new documentation has sample with AutoCompleteExtender ? how use it in ASP.NET AJAX Beta 1

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-24-2006, 5:40 PM

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25,662 point All-Star
Luis Abreu
Member since 02-12-2005, 1:22 AM
Madeira [Portugal]
Posts 5,368

hello.

it seems like you're using get for the request. try removing true from the scriptmethod and see if it works.

--
Regards,
Luis Abreu
email: labreu_at_gmail.com
EN blog:http://msmvps.com/blogs/luisabreu

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-25-2006, 4:56 AM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

Initialy it was without true, but not work too.

I place true, when try to fix with. By Http Traces this flag not change anything.

I'm found a problem, but not know how to fix it.

when i call service with button follow package was send:

{"PrefixText":"a","count":10}

but when i type "a" in text box: content will be follow:

{"prefixText":"a","count":10}

 and response from server:

 "@_Error(false,"Invalid web service call, missing value for parameter: \'PrefixText\'.","   
   at Microsoft.Web.Script.Services.WebServiceMethodData.CallMethod(Object target, IDictionary`2 parameters)
   at Microsoft.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)
   at Microsoft.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)
   at Microsoft.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","System.InvalidOperationException")Error_@"

Why in second case parametr prefixText starts with non Capital letter?

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-25-2006, 5:14 AM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

if I change Service Method signature form

public string[] GetAutoCompleteList(string PrefixText, int count)

public string[] GetAutoCompleteList(string prefixText, int count)

AutoCompleteExtender works fine. But i have no clue why it works so.

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-25-2006, 3:45 PM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

Can anyone explain why i need parametrs started from nonCapital letter?

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-25-2006, 4:03 PM

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8,834 point Star
MorningZ
Member since 07-22-2002, 2:39 PM
Fort Lauderdale, FL
Posts 1,815

First off... thanks for posting this (along with the solution) as i just ran into that error as well (Fiddler is so great for helping debug, eh)

Anyways, to maybe make an attempt at answering:

mogadanez:
Can anyone explain why i need parametrs started from nonCapital letter?

Perhaps since the "closure" to "prototype" change that capitalization became important? that's just a wild shot in the dark

"If you make it idiot proof, they'll build a better idiot"

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-25-2006, 4:26 PM

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8,834 point Star
MorningZ
Member since 07-22-2002, 2:39 PM
Fort Lauderdale, FL
Posts 1,815

Just to backup my wild shot in the dark, using fiddler to poke around the javascript files spit out by the ScriptManager it has:

Sys.Net._WebMethod._invoke(this, this._serviceMethod, this._serviceMethod, false,
{ prefixText : this._currentPrefix, count: this._completionSetCount },

"If you make it idiot proof, they'll build a better idiot"

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-26-2006, 5:22 AM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

when i call service method "by hand"

it's work with any parametrs names "PrefixText", "prefixText", and "BLABLA"
It is not work from AutoCompleteExtender ( and maybe from other components )

and i have no idea why.

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-26-2006, 5:46 AM

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25,662 point All-Star
Luis Abreu
Member since 02-12-2005, 1:22 AM
Madeira [Portugal]
Posts 5,368

hello.

that's weird...i've just tested with a simple page and i've named the parameter PrefixText and it works without any problem...

--
Regards,
Luis Abreu
email: labreu_at_gmail.com
EN blog:http://msmvps.com/blogs/luisabreu

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-26-2006, 5:54 AM

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73 point Member
mogadanez
Member since 09-22-2005, 9:33 AM
Posts 48

in simple service call? or in AutoCompleteExtender?

Re: ASP.NET AJAX Beta 1 and AutoCompleteExtender

10-26-2006, 2:13 PM

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5 point Member
Sevnn
Member since 10-26-2006, 6:10 PM
Posts 1

mogadanez:
if I change Service Method signature form
public string[] GetAutoCompleteList(string PrefixText, int count)
to
public string[] GetAutoCompleteList(string prefixText, int count)
AutoCompleteExtender works fine. But i have no clue why it works so.

I had the exact same problem and was getting very frustrated by it. This fixed my problem perfectly. Thank you for posting this fix.

Devteam, Can we get updated documentation showing these sorts of updates or atleast some form of example for the AutoCompleteExtender.