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Wednesday, March 28, 2012

calling javascript proxy functions from master.pages

I 've a master page with an scriptmanager with EnablePAgeMethods=true.

I want to call from that page a static methode from my page within client side with a call like PageMethods.DeleteFIle()-this beeing a javascript proxy class which supoused to be generated by the script manager.

The issue is that this call work well from a simple page but not from master page -on java script i 've got the PageMaster it's unknown.

Thank you

Hi,

Here is a sample made according to your requirement. Please try it:

[Master page]

<%@. Master Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"></script><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>Untitled Page</title> </head><body> <form id="form1" runat="server"> <div> <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true"> </asp:ScriptManager> <input id="Button1" type="button" value="button" onclick="SayHello();"/> <input id="Text1" type="text" /> <asp:contentplaceholder id="ContentPlaceHolder1" runat="server"> </asp:contentplaceholder> </div> <script type="text/javascript"> function SayHello() { PageMethods.Hello(onComplete); } function onComplete(result) { $get("Text1").value = result; } </script> </form></body></html>

[Content page]

<%@. Page Language="C#" MasterPageFile="~/MasterPage.master" Title="Untitled Page" %><script runat="server"> protected void Page_Load(object sender, EventArgs e) { } [System.Web.Services.WebMethod] public static string Hello() { return "Hello world!"; }</script><asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"></asp:Content>

Hope this helps.

I have nearly this exact scenario, but the result returned is always the complete markup for the page. Any ideas as to why this is?

Can you show me your code

I also have the same problem. The pagemethod callback shows full page markup instead of return value.

Here's the code

<%-- <Snippet1 Master page> --%>

<%@.MasterCodeFile="MasterPage.master.cs"Inherits="MasterPage"Language="C#" %>

<%@.RegisterAssembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Namespace="System.Web.UI"TagPrefix="asp" %>

<!DOCTYPEhtmlPUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<htmlxmlns="http://www.w3.org/1999/xhtml">

<headid="Head1"runat="server">

<title>UpdatePanel in Master Pages</title>

</head>

<body>

<formid="form1"runat="server">

<div>

<pstyle="font-family: Playbill, Fantasy; background-color: olive; font-weight: bold;

font-size: xx-large;">

Master Page

</p>

<hr/>

<asp:ScriptManagerID="ScriptManager1"runat="server"EnablePageMethods="true">

</asp:ScriptManager>

<hr/>

<br/>

<asp:ContentPlaceHolderID="ContentPlaceHolder1"runat="server">

</asp:ContentPlaceHolder>

</div>

</form>

</body>

</html>

<%-- </Snippet1> --%>

<%-- <Snippent2 Child content page> --%>

<%@.PageCodeFile="Child.aspx.cs"Inherits="Child"Language="C#"MasterPageFile="MasterPage.master"

Title="UpdatePanel in Master Pages" %>

<%@.RegisterAssembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

Namespace="System.Web.UI"TagPrefix="asp" %>

<asp:ContentID="Content1"runat="Server"ContentPlaceHolderID="ContentPlaceHolder1">

<pstyle="font-family: Playbill, Fantasy; background-color: aqua; font-weight: bold; font-size: xx-large;"> Content Page</p>

<hr/>

<scripttype="text/javascript">

function doload()

{

PageMethods.GetName(GetName_Complete);

}

function GetName_Complete()

{

if(arguments.length >0)

{

alert(arguments[0].toString());

//document.getElementById('<%=txt1.ClientID %>').value = arguments[0].toString();

}

</script>

<asp:TextBoxID="txt1"runat="server"></asp:TextBox>

<inputid="Button2"onclick="doload()"type="button"value="button"/><br/>

<br/>

<asp:UpdatePanelid="UpdatePanel2"runat="server">

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

</contenttemplate>

<asp:AsyncPostBackTriggerControlID="lnkChild"EventName="Click"></asp:AsyncPostBackTrigger>

</triggers>

</asp:UpdatePanel>

<asp:ButtonID="lnkChild"runat="server"OnClick="lnkChild_Click"Text="Ajax Update"/>

<hr/>

</asp:Content>

calling javascript functions

I am working on an ajax web page which has several controls including a ScriptManager control and the ajax Timer control. When the timer fires a tick I want the server side to perform some calculations and then call a client script function with the results. The client script will then do something with the results.

Also, I want to call another javascript function when I click a button.

I'm a bit rusty with javascript, so I'd like to see examples on how to make this work.

What and where exactly you want to do?

When the timer fires, I want the server to generate (calculate) a pair of integers (or possibly an array of pairs) and call a javascript function on the client side passing those numbers. The client will then "plot" points on a graphics window using some built-in drawing java functions I have. The timer will probably fire several times a second. The client does not need to make any calls to the server.

When a button is clicked, I want the server to call another javascript function (passing no arguments) which will erase the graphics window. The timer continues firing.

I have other buttons, to start and stop the timer, sliders to change the timer rate and other parameters, checkboxes and radio buttons which also affect the calculations, etc. All I need help with is making the client calls and passing the data. Is the ScriptManager useful in that respect? By the way, I'm kind of "new" in java.

I've seen scenarios where client calls server, and server calls the client back with a reply. However, can the server just call the client repeatedly? Or does the timer control act as the client-to-server caller?

Yo can use for calling javascript function

Registering Custom Script

from ScriptManager

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

For calling server side function use web services..

Actually, what I need to do requires "COMET", a form of "reverse AJAX". Is there an easy way to emplement COMET in ASP.Net? When the user clicks the "start" button, the server needs to begin "firing" pairs of numbers at the client at a steady rate (several times a second) until the user clicks the "stop" button.

Hi,

According to theclient life cycle, you can hook an event handler to theloadevent which will be fired every time an partial postback returns. Then invoke your graphical jscript function in it. For instance:

<%@. Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
<script runat="server"
</script
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
 <title>Untitled Page</title>
</head>
<body>
 <form id="form1" runat="server">
 <div>
 <asp:ScriptManager ID="ScriptManager1" runat="server">
 </asp:ScriptManager
 </div>
 <asp:UpdatePanel ID="UpdatePanel1" runat="server">
 <ContentTemplate>
 <asp:Timer ID="Timer1" runat="server" Interval="1000">
 </asp:Timer>
 </ContentTemplate>
 </asp:UpdatePanel>
 <input id="time" />
 </form
 <script type="text/javascript">
 function draw(){
 var dt = new Date();
 $get("time").value = dt.toString();
 }Sys.Application.add_load(ApplicationLoadHandler)
 function ApplicationLoadHandler(sender, args)
 {
 draw(); // invoke your graphical function instead
 }
 </script
</body>
</html>

Thanks, but I didnt get it what does this do ?

 <script type="text/javascript">
 function draw(){
 var dt = new Date();
 $get("time").value = dt.toString();
 }Sys.Application.add_load(ApplicationLoadHandler)
 function ApplicationLoadHandler(sender, args)
 {
 draw(); // invoke your graphical function instead
 }
 </script>

This is a javascript function with no usefulness at all, just for demostration purpose. You need to invoke what you really need here.

I need the server to send a pair of numbers to the client each time it fires.

You can expose the method of sending numbers as a web service on the server.

Then invoke it at client side.

Please read this:

http://ajax.asp.net/docs/tutorials/ConsumingWebServicesWithAJAXTutorial.aspx

calling external javascript functions/ library from within an update panel

I have an application with a large number of javaScript functions that reside in external .js files. User controls that reference these files work perfectly.

When usercontrols inside updatepanels call the external javascript functions and libraries, they fail with 'object not found' errors.

I tested using the scriptmanager.registerclientscriptblock by adding a concatenated string with a simple function and it worked. But this is a bad way to do things both from a debugging standpoint as well as ease of code. There must be a better way?

Dim scriptTextAsString

scriptText = _

"function prepareToClose() {"

& _

"alert('prepare to close');"

& _

"test();"

& _

" }"

System.Web.UI.ScriptManager.RegisterClientScriptBlock(

Me.btnLoad,Me.GetType(),"prepare_close", scriptTextTrue)

btnLoad.Attributes.Add(

"onCLick","prepareToClose(); return false;")

What is the best way to do this?

Unless someone has a better solution, here is what I did. Basically, I load the external file into a string and use the rgisterScriptBlock...everything works well and there is still just 1 instance of the scripts for easy maintenance and other non-ajax pages can use them. Here is the code for anyone interested.:

System.Web.UI.ScriptManager.RegisterClientScriptBlock(Me.btnClose, Me.GetType(), "objectives", regLongScript("objectives.js"), True)

...

Private Function regLongScript(ByVal incoming_name As String) As String
Dim objStreamReader As IO.StreamReader
Try
Dim file_name As String = ""
file_name = Request.PhysicalApplicationPath & "a\js_scripts\" & incoming_name
objStreamReader = File.OpenText(file_name)
Return objStreamReader.ReadToEnd()

Catch ex As Exception
Return ""
Finally
objStreamReader.Close()
End Try
End Function

Here's how I've been doing it:

ScriptManager.RegisterStartupScript(

UpdatePanelTest,

UpdatePanelTest.GetType(),

"keyValue",

"alert('test')",

true);

Here's how I've been doing it:

ScriptManager.RegisterStartupScript(

UpdatePanelTest,

UpdatePanelTest.GetType(),

"keyValue",

"alert('test');",

true);

Monday, March 26, 2012

calling .jsp functions from asp.net

hi friends I want to call .jsp files functions from asp.net how can I do this I need to create HessianProxyFactory for that does any one knows how to do this Thanking you, Laxmikant

You will not be able to call it unless it resides in the same domain.

Saturday, March 24, 2012

call Function after modalPopup

I need some advice on how to call functions after a modalPopup is shown.

I am using the modalpopup1.show() method to show the popup window. However, the prolem I am having is the popup is not visible until it reaches the end of the routine.

example: The Button1.Click event calls the modalpopup1.show() method:

Private Sub Button1_Click(ByVal Sender... etc... .etc...)
DoSomeThings()

modalPopup1.Show() -- a textbox is filled based on what the user selects from the modalPopup Window, and that value is sent to a function

DoSomeMoreThings(textBox.text)

Sub

The problem is that the DoSomeMoreThings(string) function is called before the ModalPopup window appears, so when the DoSomeMOreThings() Function is called, the textbox is empty (The textbox is filled by the value selected by the user in the modalpopup)

How i get the popupt to show, get the value and then continue?

Thanks

Not sure if this will help you or not, but you can use JavaScript's setTimeout(...) to delay the call to "DoSomeMoreThings"

-Damien

Hi,

Put a button 'Continue' in your modal popup. Let user hit this button after he complete input for textBox.text. Then in OnClick event of 'Continue' button call your function.

Maybe I mis-understand, but I don't think so because I need the modalPopup to pop, get the user selection and then procede to the DoSomeMoreThings.

One think I thought of was to call the function from the client. But i'm not sure how to call a function in the code behind page from the client. Is this possible?

Just to clarify: The application does not stop at the modalPopup.show() method and wait for a response.

So, lets say i've got three button in the ModalPopup window: Button1, Button2, Button3.

If you click Button1, then, back in the main page, the textbox fills with Button1. Etc... for Button2, Button3.

Then, a function is called to set the text of a label to what you selected:

ModalPopup.Show()

GetLabelText(TextBox1.text)

Sub GetlabelText(ByVal str as String)
label1.text = "You Selected " & Str
End Sub

What is happening is when I run it, and say, click button 1, the page displays Button1 in the textbox, and the Label says "You Selected ". How can I make it wait after the modalPopup.Show() until the user makes a selection, before continuing on to GetLabelText()?

I'm sorry, but I really don't understand what you are trying to do. Can't you just call ModalPopup.Show() on the onchange or onblur of the TextBox?

-Damien

Or do it as Viktar suggested, call GetLabelText method in the onclick event handler of Button1, 2, 3.

I've run into this, and worked around it, by putting the content of the modal popup inside an updatepanel, and forcing a .Update() on it before you DoSomeMoreThings(textbox.text).. That way, you will get the new textbox value.

Wednesday, March 28, 2012

calling javascript proxy functions from master.pages

calling javascript functions

Registering Custom Script

calling external javascript functions/ library from within an update panel

Monday, March 26, 2012

calling .jsp functions from asp.net

Saturday, March 24, 2012

call Function after modalPopup

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