Aamir Hasan Blog

External JavaScript added by ScriptManager.RegisterStartupScript executes

Actually, the page does execute the entire page lifecycle on asynchronous postbacks.

However, the cause of the problem is that basically, once the script is registered on the page, it cannot be registered again. That is why using ScriptManager.RegisterStartupScript, ClientScript.RegisterStartupScript, and Page.RegisterStartupScript will only call the javascript on the initial load. It's like writing
<script type="text/javascript" src="JavaScript.js" /> over and over in your document.

What you need to do, is clear the script element from the page, so that it can be readded upon asynchronous postbacks. Add the following on your page (changing the filename & path accordingly):

<asp:ScriptManager ID="ScriptManager1" runat="server" />
<script type="text/javascript">
    var prm = Sys.WebForms.PageRequestManager.getInstance();
    prm.add_pageLoaded(PageLoadedHandler);

    function PageLoadedHandler(sender, args) {
        var allScriptTags = document.getElementsByTagName("script");
        for (i = allScriptTags.length; i >= 0; i--) {
            if (allScriptTags[i] && allScriptTags[i].getAttribute("src")!=null && allScriptTags[i].getAttribute("src").indexOf("JScript.js") != -1) {
                allScriptTags[i].parentNode.removeChild(allScriptTags[i]);
            }
        }
    }
</script>

Then place this in your Page_Load event (again changing the filename and path to what you need):

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        ScriptManager.RegisterStartupScript(Page, Page.GetType, "", "<script type='text/javascript' src='JScript.js' />", False)
    End Sub

lass in ASP.NET AJAX

Wed, 03 Mar 2010 03:59:00 GMT

Encrypt & Decrypt your AJAX traffic -Microsoft Silverlight and Ajax.NET Professional

It is possible to put an AJAX token. With Silverlight we get the System.Security.Cryptography name space on the client – before it was not very easy to encrypt a string without any plug-in (well, there are some implementations of Blowfish available in JavaScript).

Encrypt and Decrypt method given below,how to implement cryptography in Ajax.NET Professional.

public override string Encrypt(string json)
{
return Security.Encrypt(Security.GetHashKey("hans"), json);
}

public override string Decrypt(string jsoncrypt)
{
return Security.Decrypt(Security.GetHashKey("hans"), jsoncrypt);
}

http://www.studentacad.com/post/2010/02/23/Encrypt-Decrypt-your-AJAX-traffic-Microsoft-Silverlight-and-AjaxNET-Professional.aspx

Tue, 23 Feb 2010 14:36:00 GMT

PHP for Microsoft AJAX Library

Author: Aamir Hasan

PHP updated support for Microsoft AJAX Library. It works with the RTM bits, and fixes several of the issues reported in my earlier samples. , so that you can join in and contribute to the project.The Microsoft AJAX Library is a standalone collection of the standards-based JavaScript classes included in Microsoft ASP.NET AJAX. it simply supports exposing PHP classes as AJAX-enabled web services, just as in ASP.NET applications. In fact, the generated proxies are identical to what you get from ASP.NET

Test Example

<?php

require_once '../../dist/MSAjaxService.php';

class TestService extends MSAjaxService
{
    function SayHello($name)
    {
        return 'Welcome, ' . $name . '!';
    }
}

$h = new HelloService();
$h->ProcessRequest();

?>

 Index.html

<html>
<head>
<title>Hello, World!</title>
<script type="text/javascript" src="../../MicrosoftAjaxLibrary/MicrosoftAjax.js"></script>
<script type="text/javascript" src="HelloService.php/js"></script>
</head>
<body>
Name: <input id="name" type="text" /> <input type="button" value="Say Hello" onclick="button_click(); return false;" />
<br />
Response from server: <span id="response"></span>
</body>
<script type="text/javascript">
    function button_click() {
        TestService.SayHello($get('name').value, function (result) { $get('response').innerHTML = result; });
    }
</script>
</html>

Oh, and if you are interest in PHP, you might want to check out the FastCGI  work on IIS to make PHP rock on IIS7.

Link:PHP for Microsoft AJAX Library

Sun, 21 Feb 2010 12:28:00 GMT

Setting bootup Operating System for Windows Vista and windows XP

Author: Aamir Hasan

Windows Vista and Windows XP is install on same machine then you have new boot loader for windows Vista and it is not using NTLDR/BOOT.ini

when u access this machine where both windows are installed on same machine and you will access remote desktop then default order from cmd u have to define are follows.

From Windows XP

Navigate (cd) to Windows Vista Windows\System32 and issue >bcdedit to know the identifier of installed OS. Note the OS guid and then issue >bcdedit /default {guid}

From Windows Vista

First open up the command prompt under Administrator account using >runas /user:Administrator. From there issue >bcdedit and >bcdedit /default

If "Run" is missing from Vista's Start Menu, right click the taskbar, choose Properties, from "Start Menu" > "Customize", check "Run Command"
>shutdown –r can be used to restart the Windows (both XP and Vista)

Sun, 21 Feb 2010 08:04:00 GMT

Display row# in gridview How to display row# in gridview, DataGrid,Repeater or DataListGridView is one of most widely used controls and we can do lots of things with the control.

In ASP.Net 2.0, Datagrid is replaced by GridView control while Datagrid control is still supported. There are large numbers of tasks that can be done through grid view control.

<%@ Page Language="C#"%>
<script runat="server">

    protectedvoid Page_Load(object sender, EventArgs e)
    {
        gridView1.DataSource =newstring[] { "Aamir Hasan", "www.studentacad.com", "aspxtutorial.com" };
        gridView1.DataBind();
        
    }
</script>
<html>
<head runat="server">
    <title>GridView Row number's</title>
</head>
<body>
    <form id="form2" runat="server">
    <div>
        <asp:GridView runat="server" ID="gridView1">
            <Columns>
                <asp:TemplateField HeaderText="#">
                    <ItemTemplate>
                        <%# Container.DataItemIndex + 1 %>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </div>
    </form>
</body>
</html>

Links

GridViewRow

GridView Row

Fri, 19 Feb 2010 17:31:00 GMT

LINQ to SQL Application Performance

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

Turn off ObjectTrackingEnabled Property of Data Context If Not Necessary
using (NorthwindDataContext context = new NorthwindDataContext())
{
context.ObjectTrackingEnabled = false;
}

Do NOT Dump All Your DB Objects into One Single Data Context
Use Compiled Query Wherever Needed
Filter Data Down to What You Need Using DataLoadOptions.AssociateWith
Turn Optimistic Concurrency Off Unless You Need It
Constantly Monitor Queries Generated by the Data Context and Analyze the Data You Retrieve
Avoid Unnecessary Attaches to Tables in the Context
Be Careful of Entity Identity Management Overhead
Retrieve Only the Number of Records You Need
Do not Misuse Compiled Query

public static Func<Northwnd, string, IQueryable<Customer>>
    CustomersByCity =
        CompiledQuery.Compile((Northwnd db, string city) =>
            from c in db.Customers where c.City == city select c);

public static Func<Northwnd, string, IQueryable<Customer>>
    CustomersById = CompiledQuery.Compile((Northwnd db,
    string id) => db.Customers.Where(c => c.CustomerID == id));

public IEnumerable<Customer> GetCustomersByCity(string city)
{
    var myDb = GetNorthwind();
    return Queries.CustomersByCity(myDb, city);
}

Reference:http://msdn.microsoft.com/en-us/library/system.data.linq.compiledquery.aspx

Wed, 17 Feb 2010 13:54:00 GMT