PageMethod problem

HI. I have a problem with calling static PageMethod in asp.net ajax.

Problem apperars then i use UrlMappings. For example i have this code in web.config

<urlMappings>
<add url="~/ComputerManager/WorkstationList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=1"/>
<add url="~/ComputerManager/ServerList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=2"/>
</urlMappings>

and this code in ComputerList.aspx. cs

[WebMethod]
public static string SetSelection(string ID,string dataKey,bool state)
{
 ...
}

so, when call PageMethods.SetSelection(...) a have a error "The server method SetSelection is failed".

post url ends with WorkstationList.aspx/SetSelection

any ideas?

Hi,

You are rewriting your URL, and these URL are fixed one. They don't cater for any extra items or query string parameters. Thats why they don't map to actual page when you want to do that. In this case I will recommend that you add another entry with following items

<urlMappings><add url="~/ComputerManager/WorkstationList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=1"/><add url="~/ComputerManager/ServerList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=2"/><add url="~/ComputerManager/WorkstationList.aspx/SetSelection" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=1"/><add url="~/ComputerManager/ServerList.aspx/SetSelection" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=2"/></urlMappings>

Then i use mappings like you suggested, i get a request to pageComputerList.aspx with parametercomp_type=1, insted of calling PageMethod.

So i rewrite it this way

<urlMappings>
<add url="~/ComputerManager/WorkstationList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=1"/>
<add url="~/ComputerManager/ServerList.aspx" mappedUrl="~/ComputerManager/ComputerList.aspx?comp_type=2"/>
<add url="~/ComputerManager/WorkstationList.aspx/SetSelection" mappedUrl="~/ComputerManager/ComputerList.aspx/SetSelection"/>
<add url="~/ComputerManager/ServerList.aspx/SetSelection" mappedUrl="~/ComputerManager/ComputerList.aspx/SetSelection"/>
</urlMappings>

and that solves my problem.

Thanks for good idea,ziqbalbh.

PageMethod Exception: "An entry with the same key already exists."

I am calling a PageMethod from a javascript function. This function is called from many different controls on a page. The problem occurs about the second time the method is called. An exception is thrown saying that an entry with the same key already exists. The weird thing is that everything continues to work normally from the users perspective. I would never have noticed this behaviour if I hadn't be debugging. Its more annoying than developement breaking, but I would still like a solution to it. Except I have no idea how to proceed. Am I just using PageMethod improperly?

I'm using ASP.NET 2.0 with C# code.

My config file says this about the assembly I'm using: System.Web.Extensions, Version=1.0.61025.0

Stack trace follows...

EXCEPTION:

{"Error executing child request for /thesite/problemLog.aspx."}

STACK: atSystem.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler,TextWriter writer, Boolean preserveForm, Boolean setPreviousPage,VirtualPath path, VirtualPath filePath, String physPath, Exceptionerror, String queryStringOverride)
at System.Web.HttpServerUtility.Execute(String path, TextWriter writer, Boolean preserveForm)
at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm)
at System.Web.HttpServerUtility.Transfer(String path)
at ASP.global_asax.Application_Error(Object sender, EventArgs e) in c:\Projects\Velocity Code\cfdrodeo\Global.asax:line 92
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.Web.HttpApplication.RaiseOnError()

INNER EXCEPTION:

{"Exception of type 'System.Web.HttpUnhandledException' was thrown."}

STACK:

at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.problemlog_aspx.ProcessRequest(HttpContext context) inc:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NETFiles\cfdrodeo\0b93ea50\5991e932\App_Web_xczsyy3k.22.cs:line 0
at System.Web.HttpServerUtility.ExecuteInternal(IHttpHandlerhandler, TextWriter writer, Boolean preserveForm, BooleansetPreviousPage, VirtualPath path, VirtualPath filePath, StringphysPath, Exception error, String queryStringOverride)

INNER EXCEPTION:

{"An entry with the same key already exists."}

STACK:

at System.Collections.Specialized.ListDictionary.Add(Object key, Object value)
at System.Web.UI.ClientScriptManager.RegisterScriptBlock(ScriptKey key, String script, ListDictionary& scriptBlocks, ArrayList& scriptList, Boolean needsScriptTags, Boolean& inScriptBlock)
at System.Web.UI.ClientScriptManager.RegisterScriptBlock(ScriptKey key, String script, ClientAPIRegisterType type)
at System.Web.UI.ClientScriptManager.RegisterClientScriptInclude(Type type, String key, String url)
at System.Web.UI.ScriptRegistrationManager.RegisterClientScriptInclude(Control control, Type type, String key, String url)
at System.Web.UI.ScriptManager.RegisterClientScriptInclude(Control control, Type type, String key, String url)
at System.Web.UI.ScriptManager.RegisterClientScriptIncludeInternal(Control control, Type type, String key, String url)
at System.Web.UI.ScriptManager.RegisterScripts()
at System.Web.UI.ScriptManager.OnPagePreRenderComplete(Object sender, EventArgs e)
at System.Web.UI.Page.OnPreRenderComplete(EventArgs e)
at System.Web.UI.Page.PerformPreRenderComplete()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Thank you for your help.

Hi,

could you post the code of your page method and the JavaScript code that you use to invoke it?

PageMethods call - Authentication Failed.

Hello,

I am working with RC1 and am having problems calling a pagemethod. It keeps telling me Authentication failed. 

My page is using a master page where the Scriptmanager is declared. As you can see I am using a ScriptmanagerProxy on my main page.

The code works fine when forms authentication is not on and everything else on the site works fine when Authentication is on except Ajax pagemethod calls.

Authentication is occurring on my login in page and all of the Athentication is builtinto the codebehinds. My Question. Do I have to implement

Sys.Services.AuthenticationService to be allowed to call an Ajax web service call or pageMethod call when usingFormsAuthenication?

 Here is an incomplete example of what I am trying to do. Missing the login page

// java script file test.jsfunction pageLoad(sender, eventArgs){ PageMethods.TestThis("bar",onTestComplete, OnTestFail);} 
function onTestComplete(result){ alert(result);} function OnTestFail(error){ alert(error._message)}
 // code behind[WebMethod]public static string TestThis(string name){return"foo " + name;}

 
<!-- web config --><system.web><authentication mode="Forms"><forms name="test" loginUrl="Login.aspx" protection="All" timeout="60" path="/" requireSSL="false" slidingExpiration="true" defaultUrl="Default.aspx" cookieless="UseDeviceProfile" enableCrossAppRedirects="true"/></authentication><authorization><deny users="?"></deny><allow users="*"/></authorization></system.web><!-- html page --><asp:ScriptManagerProxy id="ScriptManagerProxy1" runat="server"> <SCRIPTS> <asp:ScriptReference Name="PreviewScript.js" Assembly="Microsoft.Web.Preview> <asp:ScriptReference Path="Scripts/test.js" ScriptMode="Debug"'> </SCRIPTS> <SERVICES> </SERVICES></asp:ScriptManagerProxy>
 

"Debug"'>Can someone please help me??

"Debug"'>Thanks in advance. 

"Debug"'> 

Ok, Im gonna guess that its probably becasue the pageMethod has to be defined as static, if so is there a workaround?

Or are pageMethods totally useless in site with forms authentication?

Try changing your pagemethod's WebMethod attribute to be: [WebMethod(Session=true)]. That should help w/ the authentication issue.

PageMethods is undefined when calling webservice from usercontrol

I have the following code to call a webservice in an aspx file. But the same code does not work in a usercontrol that I have created. I always get the message that 'PageMethods is undefined'. On the aspx page it generates the following:

<script type="text/javascript">
<!--
var PageMethods = { HelloWorld:function(s,onMethodComplete, onMethodTimeout, onMethodError) {return Web.Net.PageMethodRequest.callMethod("HelloWorld",{s:s}, onMethodComplete, onMethodTimeout, onMethodError); }
}
// -->
</script>

but in the usercontrol this variable is not generated. The following is the code in the aspx page which is very similar to the code in the user control. Please help!

<atlas:ScriptID="Script1"runat="server"Path="~/ScriptLibrary/AtlasCompat.js"Browser="Mozilla"/>

<atlas:ScriptID="Script2"runat="server"Path="~/ScriptLibrary/AtlasCompat.js"Browser="Firefox"/>

<atlas:ScriptID="Script3"runat="server"Path="~/ScriptLibrary/Atlas.js"/>

<scripttype="text/C#"runat="server">

[WebMethod]

publicstring HelloWorld(string s)

{

return"Hello '" + s +"'";

}

</script>

</head>

<body>

<formid="Form1"runat="server">

Enter your name:

<asp:TextBoxid="nameTextBox"runat="server"></asp:TextBox>

<buttonid="buttonGo"onclick="return OnbuttonGo_click()">GO</button>

</form>

<scripttype="text/javascript"language="JavaScript">

function OnbuttonGo_click()

{

//textbox string value passed as a param to the server method

PageMethods.HelloWorld(document.getElementById("nameTextBox").value, OnWebRequestComplete1);

returnfalse;

}

PageMethods are currently not supported inside user controls. I've open a bug to track that issue. Thanks.

If I put the WebMethod in the calling page I can call it from the usercontrol, which allows for the functionality that I desire. This is not as clean as I hoped for but it will work.

Thanks

Has this been fixed in the December release? It appears not, unless I am doing something incorrect. I am getting the js error 'Web' is undefined. Even my work around for this problem apears to be broken.

PageRequestManagerServerErrorException with 500 error code

In javascript I'm setting the value property of a button within an update panel before calling click() on the button to refresh the update panel. (I need to refresh an update panel and pass extra data on the callback, and no one on this forum has yet described a better way of doing it than this.)

This was all working in tests that I did last week, but I'm now getting the following error message box in IE:

"Sys.WebForms.PageRequestManagerServerErrorException: An unkown error ocurred while processing the request on the server. The status code returned from the server was: 500"

Any ideas?

I have the same error but on a couple of dropdown which update one another's datesource with updatePanels.

If i change the value of the first dropdown for several times, always the third tine gives this error.

I found on a post the setting TRACE off resolves but not for me.

Any ideas ?

Just try to change frequently some controls which use updatepanels (for other controls) and see what's happen.

Thank's

Sorin

I found also that If I have more than 3 UpdatePanels in a Page I get this error after 3 callbacks.

If I have on page Trace="false"and "EnableEventValidation="true"

I get this error:

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@. Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Thank's again

I've also tried setting the value of a hidden field and a hidden textbox and both raise the same error.

I cannot even paste data into a textbox and then do a postback without getting this error.

I'm also EXTREMELY TIRED OF MICROSOFT IGNORING ALL OF MY POSTS!!!!!!!!!!!

Partial page update question

Why isn't this section of code not calling mychkShowLegend_CheckedChanged in my code behind? I can put the same code that changes the visible to true/false based on checked in my PageLoad, and it works...otherwise, I take it out of the PageLoad and just leave it in thechkShowLegend_CheckedChanged and it doesn't work. Here's my code:

 <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" /> <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:CheckBox ID="chkShowLegend" runat="server" AutoPostBack="True" Text="Notification Legend" />  <asp:Panel ID="Legend" runat="server" Visible="false"> <div id="lblLegend" style="Z-INDEX: 3; WIDTH: 477px; HEIGHT: 115px; border: solid 1px; padding-right: 5px; padding-left: 7px; padding-bottom: 5px; padding-top: 5px;" align="left" runat="server"> <font face="Arial" size="4"> <span style="font-size: 10pt;"> <span style="color: black"><strong>Black Text</strong></span> - Interval value received; operating environment normal<br /> <span style="color: gray"><strong>Gray Text</strong></span> - Interval value not received; previous valid interval substituted<br /> <span style="color: royalblue"><strong>Blue Text</strong></span> - Setpoint has changed from previous interval value<br /> <span style="color: crimson"><strong>Red Text</strong></span> - OOME for this interval<br /> <span style="color: darkorange"><strong>Orange Text</strong></span> - SCADA value is out of range compared to setpoints<br /> <span style="color: forestgreen"><strong>Green Text</strong></span> - LIP value has a different sign (+/-) compared to previous interval<br /> *Please check above indicators for current interval; multiple indicators are possible </span> </font> </div> </asp:Panel> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="chkShowLegend" EventName="CheckedChanged" /> </Triggers> </asp:UpdatePanel>In my code behind: protected void chkShowLegend_CheckedChanged(object sender, EventArgs e) { if (chkShowLegend.Checked) Legend.Visible = true; else Legend.Visible = false; }

I have tried your code, its working perfectly for me without any modification to your code.

canyou try by removing <triggers> section of update panel sincechkbox is inside the updatepanel it will automatically taken as atrigger(since childrenastriggers property of updatepanel is havingdefault value "true").

Some references.

http://ajax.asp.net/docs/mref/P_System_Web_UI_UpdatePanel_ChildrenAsTriggers.aspx

http://ajax.asp.net/docs/mref/P_System_Web_UI_UpdatePanel_UpdateMode.aspx

Isuppose you are using other update panels alose on the page. which maycausing the issue.In that case its better if you can put the completepage code so that we can look into that.

Removing the trigger section worked perfectly. I do have multiple update panels on this page and I was wondering if that was causing problems; the other two have timers as triggers, a 1 second timer and a 30 second timer.

Thanks for the help!