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Client-Side Callback & Ajax

Posted on 2011-09-27
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Last Modified: 2012-05-12
Can we say taht client-side callback is equal to "Ajax"?
They have the same function but just different terms?

Thanks.
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Question by:zhshqzyc
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jagrut_patel earned 500 total points
ID: 36709939
AFAIK, yes funtionally Client-side callback = AJAX.

I have heard of Client-side callback only in MS world. AJAX is more global terminology.
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Author Comment

by:zhshqzyc
ID: 36710021
Can we say the following code is a lagacy skill? Since we have ajax, we can use a different way to write code.
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class WSCallback : System.Web.UI.Page,
   System.Web.UI.ICallbackEventHandler
{
    private string _callbackResult = null;

    protected void Page_Load(object sender, EventArgs e)
    {
        string cbReference = Page.ClientScript.GetCallbackEventReference(this,
           "arg", "GetTempFromServer", "context");
        string cbScript = "function UseCallback(arg, context)" +
           "{" + cbReference + ";" + "}";

        Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
           "UseCallback", cbScript, true);
    }

    public void RaiseCallbackEvent(string eventArg)
    {
        // You will need to make a reference to an external web service for this to work
        // Weather.TemperatureService ws = new Weather.TemperatureService();
        // _callbackResult = ws.getTemp(eventArg).ToString();
    }

    public string GetCallbackResult()
    {
        return _callbackResult;
    }
}

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