Introduction

Ajax Control Toolkit 3.5 Download

AJAX DLL is a library developed using .NET for ASP.NET 3.0/3.5/4.0/4.5. It is used to call server side methods from JavaScript. You can pass the method parameter value from JavaScript. A parameter can be a variable or a Model object.

In the given example, I have used the parameter as a string variable, an array object and a Model class object. A benefit of this DLL is that you can use it at UserControl level, so if you have some method in UserControl and you want to call it via JavaScript, you can achieve it using this DLL. A drawback of this DLL is that you cannot access your server control in your method, because the Page Life Cycle is not involved during the method call like in UpdatePanel. But you can access your server control from JavaScript and assign the value which will be returned by the AJAX method.

Using the Code

It’s very simple to use Ajax DLL. You need to create a web application or a web site and add reference of Ajax.dll which is in the attached file.

Once a DLL has been added into your application, you need to place a line code in the Page_Load event as below:

This code will register your page class in DLL with all your AJAX method(s) written in the page class, which are given in the image below. Check the below image, you will find that the methods have been annotated with an attribute Ajax.AjaxMethod. You need to annotate with an attribute to the methods which you want to call from JavaScript.

There are five optional parameters with the Ajax.AjaxMethod attribute:

1. Method name: A method which you want to call from JS. Default will be the same method name which you have created.
2. Js callback method name: On Successful End Request of the AJAX call. Default will be the Callback_<your method name>.
3. Js Error method Name: Any Error at the time of End Request of the AJAX call. Default will be the Error_<your method name>.
4. Loading Text: The text you want to show. Default text is string.Empty.
5. Asynchronous Call: Boolean value, used to make your call synchronous from JavaScript. Default value is True.

Once the methods have been written, you can call all these methods from JS as defined in the first parameter of Ajax.AjaxMethod. For that, you can write the JS methods as below:

Check here the CallTest1() function. From the function, the PassArrayObject method is called as defined in the first parameter of the Ajax attribute. The parameter value and the method name should be the same. Also check the last function CallReturnEvenOdd() for which the callback method or error method is not required, because its server method ReturnEvenOdd is defined with the IsAsync=false parameter (check the previous image). So the value will be returned to the same function CallReturnEvenOdd(). _Default object is used to call the methods PassArrayObject and ReturnEvenOdd. This _Default is nothing but the page class name. So now we can create same name methods in page as well as in user control and call with respective class object.

At last, you need to apply some configuration in the web.config file as below:

The latest Ajax dll supports Restful Service call. Note that it will call only those Restful Services which are in same domain. Steps to call Restful Service using this dll are given below.

1. Create Restful Service in your project.
2. Call using SmartAjax.CallService method, which has 3 parameters.
   1. URL: Restful service url
   2. Method Parameters: Parameters in String Json format
   3. Callback methods:
   • • onSuccess: A method name on successful call
     • onError: A method name on error

A complete example is given in attached demo project.

Find the HTML code here:

Find the CS file code here:

Ajaxcontroltoolkit.dll For Asp.net 3.5 Download

History

Ajax Control Toolkit Dll Download

• 30^th Jul 2014: Article updated.
  1. Consecutive ajax call support. Enable to make another ajax call from success or error method of first ajax call.
• 20^th Jul 2013: Article updated.
  1. More object oriented js.
  2. Generic support.
  3. Restful Service support.
• 9^th Jul, 2011: Article updated.
  1. No need to add extensions 'ajax' & 'ajaxj' in IIS.
  2. ShowLoading parameter is removed. If you don't want to display loading message, pass string.empty or null.
  3. New Parameter IsAsync is introduced, default value is true. If false, then it will make synchronize call from JavaScript. No Callback or Error method is required to handle it.
  4. Less JS rendering. Performance is improved.
• 9^th February, 2010: Article updated.
• 17^th November, 2009: Initial post.