AJAX :: Write A Wrapper Method Around The WebMethod When Using PageMethods?
Jan 19, 2011
I am using ASP.net with WebMethods to show data to the customer and save data entered by the customer.
My current framework uses javascript to create an xml with all of the values of all the html elements in de "div" (or other element). This xml is converted to a string and send to the webserver using PageMethods.
When I receive this xml (as a string), I parse it with my own XmlDataParser which does some security checks.
I need to parse the xml to an XmlDataParser in every PageMethod I use, and I also need to catch different exceptions (like exceptions that are thrown when data is validated) to show them to the user (=> The reason why is explained in one of my previous posts: [URL]
I wonder if it is possible to write a wrapper around the WebMethod, so I can parse the xml to the XmlDataParser in this wrapper, and pass it on to the code behind, and process exceptions that occur in the code behind?
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Jan 19, 2010
is it possible to call a custom method or class before accessing webmethod from pageMethods ?
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Jul 16, 2012
I found this Article from link : [URL] .... that explains how to call server-side Method from javascript,
I used your code, my server-side function is static, public, and also I added
[System.Web.Services.WebMethod]
and
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
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Apr 3, 2010
I am creating a website in asp.net its a very big site about 250 pages and with a big sql database. I am confused as which ajax method i should follow. There are three options.
1. ASP.NET UpdatePanels -: Simple to use but causes a lots of uneccessary request and viewstate. I want my pages to open as quick as possible.
2.ICallback-: Causes less request and renders the page quickly. But security concerns and viewstate are there.
3.Page Methods with jQuery-: No Security anyone can quickly hack the parameters passed using "POST" mehtod.
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Mar 25, 2010
Aspx Page:
$(document).ready(function() {
$("#btnn").click(function() {
$.ajax({
type: "POST",
url: "TestPage.aspx/emp",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
}
});
});
});
CodeBehind:
public void grdload()
{
GridView1.DataSource = GetEmployee("Select * from Employee");
GridView1.DataBind();
}
[WebMethod]
public static void emp()
{
TestPage re = new TestPage();
re.grdload();
}
I Can't Gridview Data Load ? How To Make GridView Data Load?
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Jul 12, 2010
I've a static page method in web form application and I want to call method on private class level variable from it as shown below. I'm using jQuery to call the page method.
private readonly ICatalogBLL _catalogBLL = new CatalogBLL();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
_catalogBLL.GetSomething();
}
}
[WebMethod]
public static UpdateSomething(int i)
{
//Want to do as below. But can't call it from a static method.
_catalogBLL.UpdateSomething();
}
UPDATE If I call it as said by John Saunders, won't it use the same instance for requests from different users as it is within a static method?
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May 19, 2010
I have a service that works great on my development box. It uses JQuery to hit my web service, and then the JSON results are sent back.
The web service is located on our basePage.cs. We didn't want to put out an external WebService for this. Our on beta box something different is happening.
The web page seems to be trying to call the web method correctly - the JSON data is being sent... but the server doesn't seem to know it's a webmethod. here's my service function (it's in our basepage.cs which inherits from Page).
[Code]....
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Mar 29, 2011
I am reading in a file into a string. Then I am writing this string to a stream. I know this code works fine.
The only problem that I have is with the line that write the data in chunks where the parameters is not supported for the Write method.
The line that has the problem is this line. What do I need to change here?
OutPut.Write(buffer, 0, Math.Min(to_write, WRITE_CHUNK));
[Code]....
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Jul 15, 2010
I have this CollapsiblePanelExtender (below) the problem is that in firefox it gives a horizontal scroll bar under the control which has to expand.
[Code]....
Below is the generated HTML
[Code]....
If I remove the "overflow-y:hidden" from the generated div then the scroll bar goes away, which is what I want....
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Dec 1, 2010
1.What is the use of writing method as webmethod in cs file
2.what is the use of calling webmethods through javascript file.
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Dec 10, 2010
i wrote a webmethod on webservice. it will do adding product to shoppingbasket. But it doesn't work. i used a class and its method in this webservice method. error is about it. my code are below:
[Code]....
[Code]....
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Aug 4, 2010
, imagine a Master page that implements IFooMaster with a method
ShowFancyMessagePopupTheBusinessCantLiveWithout(string message);
I am in a page that inherits this master page. Upon a checkbox being unchecekd, I want to show a message to the user that if they save it, they can't re-check the checkbox without some admin action.
I've been given feedback that I can't just use an alert('message'); in javascript because they want the consistent look of these messages.
Next, I tried to make an ajax call via PageMethods (as that's what everything else in this codebase uses) to show a message. My problem lies in this method being static.
[WebMethod]
public static void ShowSuperImportantMessage()
{
if(!checkboxICareAbout.Checked)
((IFooMaster)Master).ShowFancyMessagePopupTheBusinessCantLiveWithout("If you uncheck that thing, you can't recheck it.");
}
Since ShowSuperImportantMessage() is static, I can't access Master from within. The method on the master page looks more or less like this:
public void ShowFancyMessagePopupTheBusinessCantLiveWithout(string message)
{
lblGenericMessage.Text = message;
btnGenericMessageOK.Focus();
upGenericMessage.Update();
mpeGenericMessage.Show();
}
mpeGenericMessage is an ajaxtoolkit:ModalPopupExtender.
upGenericMessage is an update panel.The other 2 are obvious.
Can I do some jQuery kung-fu to show that stuff? I tried, but the solution complained that the controls I tried to refer to by ClientID didn't resolve since they were on the Master page.
quick edit: Before anyone tells me the architecture is a problem, or I shouldn't have put such a thing on a master page, or w/e...
I know the situation is not ideal, but I this is inherited code, and I can't drop it all and rewrite half of their web stack.
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Nov 16, 2010
My friend is trying to call a page method from a seperate js file. We have added a scriptmanager to the page and set EnablePageMethods to true.His functions are decorated with <Webmethod> and they a Public Shared Functions In the js when we run the code it breaks on
Code:
Pagemethod.Test(var1, var2, OnSucceeded, OnFailed)
it says "object does not support this property or method"I created a test app and called a page method and that worked fine. How do I debug this issue. It doesn't seem that his project is seeing the Pagemethods
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Jul 19, 2010
In my asp.net website I need to return data obtained from DB by adding html tags to it from a server side method,just like a webmethod returns jsonified data. I am having trouble understanding if a webmethod can serve the purpose(i.e., htmlifying the data).If not how do I acheive it?
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Jul 1, 2010
I'm trying to implement a view tracking web service on my website. I'm using JavaScript because I want to exclude any search bots from my tracked views. The problem is I'm getting a "Unknown web method" error when I try to use jQuery to post to the web service I've created.
$(document).ready(function() {
$.ajax({
type: "POST", [code]...
The error is an ASP .NET error: Unknown web method TrackItemView. Parameter name: methodName.I've done this hundreds of times (seemingly), but I just can't see what I'm missing. I'm sure it's something small...
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Aug 18, 2010
Why Ajax pagemethods are static?
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Mar 28, 2011
I have defined a Shared Function in the code behind and a javascript function to call the webmethod. Also, I have EnablePageMethogs set to true in ScriptManager.
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Jul 15, 2010
I wrote a code to call some event...
[Code]....
and
[Code]....
js calls this code and I get object reference not set to an instance of an object
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Jun 14, 2010
Ran into a bit of problem when using PageMethods when calling a webmethod in the code-behind. My markup page has a radgrid which gets populated via the objectdatasource.Pagemethods works and returns data as expected when the objectdatasource binds the radgrid with some data but not when the objectdatasource returns nothing, i.e. radgrid is empty. PageMethods call has got nothing to do with the objectdatasource, I'm simply using its output to build a list of checkboxes dynamically on the client side using Javascript. And this is how my code snippets looks like:Markup page:
<script type="text/javascript">
function CallGetARInvoices(src,dest)
{
[code]...
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Oct 7, 2010
One reason we currently use UpdatePanels for doing our AJAX is because our BL and DA layers pass around the Page.User.Identity for authentication.
Is there a way to access this?
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Oct 1, 2010
I am using an AJAX dropdownlist control with two dropdownlist. Instead of using a webservice to populate the data, I used the pagemethod to populate. My problem is the second droplist won't populate. I get a server error, 500 in the droplist. The first droplist populates fine.
BUT here's the real kicker. If I reverse the order of the public static function such that GetHelloList2 comes BEFORE GetHelloList1 in the code, then the GetHelloList2 works ...... it just seems like it is only firing one pagemethod event and allowign only one.
[URL]
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Oct 26, 2010
Since last week I've had a really odd issue with PageMethods, the forms authentication cookie, and the back button which i've never seen before.
Essentially, I have a 'home page' which on document.ready (using jQuery), loads some data through PageMethods, and then renders a list - from which you can click through to a details page about the item. In general use, it works fine. However, using the back button after clicking through (ie: going back to the home page), it throws a PageMethods error. The browser's 'authentication required' prompt appears, and if you click cancel, the server returns a 401. The error returned by PageMethods on the client side is 'authentication failed'.
After inspecting the request in Fiddler, the forms authentication cookie isn't sent with the request, which would explain why it is happening. My fiddler entry for the request looks like this:
[Code]....
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Jun 30, 2012
I have tried code, but there is error...
Compilation Error:
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS1525: Invalid expression term ')'
Source Error:
Line 8: <script type = "text/javascript">
Line 9: function ShowAvailability() {
Line 10: PageMethods.CheckUserName(document.getElementById("<%=txtUserName.LoginID%%>").value, OnSuccess); Line 11: }
Line 12: function OnSuccess(response) {
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Jan 16, 2011
I have a project that uses PageMethods to call functions on the server. The server functions (written in C#) return the values as array of strings, without doing any kind of serialization and in the client side (from Js) the accessing of the return values is by using static variable called arguments. I found that sometimes for some users (cases are not repro) sometimes an exception occured
"WebServiceFailedException the server method 'Foo' returned invalid data. the 'd' property is missing from JSON."
Some searching on google I found that people are serializing the return values using DataContractJsonSerializer class and in js accessing the return value using one of the callback function Example:
function OnRequestComplete(result,
userContext, methodName) {
var Person = eval('(' + result + ')');
alert(Person.Forename);
alert(Person.Surname); }
So is the first technique is correct? or what?
P.S:
the function on the server is defined on the default.aspx.cs file as follows:
[System.Web.Services.WebMethodAttribute(), System.Web.Script.Services.ScriptMethodAttribute()]
public static string[] Foo(string s);
from the client side the calling is as follows
PageMethods.Foo("value",OnSuccess);
Also all the users have the same browser version (IE8)
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Nov 8, 2010
I have an ASP.Net page with some static methods that I access from the client side using AJAX and the PageMethods capability of the ScriptManager control. The web site has forms authentication setup.My problem is that when the user is not signed in, and makes an action that calls one of the page methods, the operation fails and the failure handler is called as expected but the error object has the status code 500 (internal server error), while it was expected to be 401 (not authorized), because it's the forms authentication module who interrupted the request.Even when I write code like this in the service method:
[Code]....
I also get the status code 500, and an indication of a ThreadAbortException (because of Response.End) in the failure handler. It appears that the handler that carries out service methods calls consider anything that interrupts the execution of the method "an internal server error" regardless of the cause.
Now what should I do if I want to provide a message saying "You are not logged in" to the user, or even redirect him to the login page, while I can't distinguish between the several errors that may occur because I always get status code of 500.
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