How to implement ASP.NET and Ajax

Ajax should not be a technology, it is just an idea. It has nothing to do with ASP.NET and other Web development languages. Here we just talk about the Ajax technology currently used in ASP.NET and other Ajax implementations. Excellent framework. Interested friends, let’s learn how to implement asp.net and ajax together

Ajax has been very popular for a while, but talking about Ajax now feels a bit old-fashioned, -_____-". The current so-called Web2.0 websites are basically There is nothing on the Internet that does not use Ajax, just like using RSS, it is like a label, and it becomes 2.0 when you put it on it. Regardless of the specific details of Ajax, its purpose is to allow the user to trigger some operations, the page will not be refreshed, only refreshed For the "partial pages" to be updated, during the process of loading data, the Loading picture is used to indicate that the data is being loaded. Not only does it look good, it also improves the user's access experience and gives it a cool feeling.

As for Ajax used in ASP.NET, I think most people use Ajax.net / AjaxProfessional or the Atlas framework included in ASP.NET 2.0. Because I have used them all, I feel that these are not very good. Ajax solution.

AjaxPro is not very convenient to use. The page needs to be registered in Page_Load, similar to

private void Page_Load(object sender, System.EventArgs e)
{
  AjaxPro.Utility.RegisterTypeForAjax(typeof(DataAccess.MyAjax));
}

And the ASPX page must contain A tag with Runat=Server, so that Ajax.net will load some common functions used as well as your customized functions. If there is no , it is actually OK. You can just add it manually. . However, in the applications I have made before, there are some problems that often occur. For example, I often find that there are js script errors in the browser status bar, and at this time all the Ajax effects you have made will be invalid. The solution is, Just re-cover the Ajax.dll/AjaxPro.dll. What is the cause of the problem is not yet known.

As for Atlas, my feeling about it is actually the same as the feeling about DataGrid. Same, well, this kind of control is easy to use and very convenient, but when you actually make some web applications, you have to consider various issues such as performance and layering. I think, in more formal web applications , not many people use DataGrid to display some data. It is recommended that you use these controls as little as possible. In addition, the execution efficiency of Atlas is indeed not ideal. It has been loading and waiting for a long time, and some script errors have occurred. Sweat.

Are there any other solutions? You can write some Javascript functions to implement it yourself. However, I recommend using jQuery, the Javascript framework, and quote an introduction to it from Baidu Encyclopedia:

jQuery is another excellent Javascrīpt framework after prototype. Its purpose is - WRITE LESS, DO MORE, write less code and do more things.
It is a lightweight js library (only 21k after compression), which is beyond the reach of other js libraries. It is compatible with CSS3 and various browsers (IE 6.0, FF 1.5, Safari 2.0, Opera 9.0 ).

jQuery is a fast, concise javaScript library that allows users to more easily process HTML documents and events, implement animation effects, and easily provide AJAX interactions for websites.

Another big advantage of jQuery is that its documentation is very complete and its various applications are explained in detail. There are also many mature plug-ins to choose from.
jQuery can keep the code and html content of the user's html page separated. That is to say, there is no need to insert a bunch of js in the html to call the command. You only need to define the id.

It seems that you will know from this introduction that the Ajax effect is just one of the many functions of jQuery. Generally speaking, the use of Ajax in Web applications must be inseparable from Javascript, and jQuery is encapsulated for everyone. It provides some JS functions so that you no longer have to worry about the complexity of JS. jQuery helps you achieve everything.

Looking at a small example, you will know that it is very convenient to use jQuery to do Ajax.

For example, there is a Button in an ASPX or HTML page. Clicking it triggers Ajax to load data and display it in . Click that Button to trigger a JS function:

function GetNews()
{
      $("#News").html("Loading News......");
      $.ajax({
        type:"post",
        url:"/ajax.aspx?act=getnews",
        dataType:"html",
        data:"",
        success:function(result)
        {
          $("#News").html(result);
        }
        });
}

This function will first display "Loading News...." in that SPAN, through asynchronous Call and access the page /Ajax.aspx, and tell the page what type of data it needs through the passed URL parameter act=News. You can write the data directly to the page through Ajax.aspx according to different parameters, and then return it to the above JS Function, presented to the page, it’s just that simple!

The above content is the implementation method of ASP.NET and Ajax shared with you. I hope you like it.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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