Resource for understanding working of web application - ASP.NET Discussion Boards

Re: Adding Concatenated Column to DataTable

ToddHileHoffer23-Feb-09 5:08

ToddHileHoffer

23-Feb-09 5:08

FYI if you are doing read only, the sqldatareader is more efficient. Especially for larger result sets.

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Re: Adding Concatenated Column to DataTable

Steve Skelton23-Feb-09 5:10

Steve Skelton

23-Feb-09 5:10

i suppose you mean to replace

New SqlDataAdapter(cmd)

with New SqlDataReader(cmd)

Re: Adding Concatenated Column to DataTable

ToddHileHoffer23-Feb-09 5:19

ToddHileHoffer

23-Feb-09 5:19

Something like this...

string queryString =
"Put your sql here and use parameters if necessary";

using (SqlConnection connection =
new SqlConnection(connectionString))
{
SqlCommand command =
new SqlCommand(queryString, connection);
connection.Open();

SqlDataReader reader = command.ExecuteReader();

DisplayResults.DataSource = reader;

DisplayResults.DataBind();

// Call Close when done reading.
reader.Close();
}

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Re: Adding Concatenated Column to DataTable

Steve Skelton23-Feb-09 5:25

Steve Skelton

23-Feb-09 5:25

thanks - i'm new to all this and it's good to be reminded of when to use what in the ADO.NET world.

ASP.NET application load

alexfromto23-Feb-09 3:50

alexfromto

23-Feb-09 3:50

Hi all.

I have .NET web application, which gives user overall sales performans and uses iframe to load some detailed sales data. Because of that iframe design the applicaion is loaded slower at first run (I guess it has to load 2 pages: the main and the iframe page). The question I have is: If I increase memory on my server will the application run faster?

Thanks.

Alex.

Re: ASP.NET application load

ToddHileHoffer23-Feb-09 4:09

ToddHileHoffer

23-Feb-09 4:09

alexfromto wrote:
The question I have is: If I increase memory on my server will the application run faster?

Probably not.

I have a suggestion for you...

Check your IIS Settings, you will see that the amount of ram each application pool can use is configurable.

Your issue could be a sql query that is not optimized. How long does the sql query take to run?

If that isn't the issue you could install this http://www.jetbrains.com/profiler/[^]

It will enable you to determine how long each .net method is taking to execute.

If that doesn't help you could install fire fox, firebug and http://developer.yahoo.com/yslow/[^]

Basically, you need to rule out a hole host of issues before you go adding ram to your web server.

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Need VB/ASP equivalent of PHP's fie_get_contents to retrieve URL contents

Doug Coughler23-Feb-09 3:48

Doug Coughler

23-Feb-09 3:48

I had created a very simple PHP page that would read in a value from a wiki webpage, then use that number to retrieve information for a different wiki page, and spit the whole thing out into a purely HTML webpage. Recently, we moved our site over to a Windows server, and the php page no longer worked. I managed to throw together an HTML/javascript equivalent, but I'd really like to do all of this work on the server instead of on the client, in order to hide the "guts". I'm hiding them for ethetics, not security, and so that the page, once retrieved, can be viewed offiline. Can someone tell me how to do this in asp and vbscript please?

Here is the PHP page:

<html><head><title>Helpful Hints</title> </head> 
<body> 
 <?php <br mode="hold" /?> 
   $configFile=file_get_contents('http://www.mysite.com/wiki/data/pages/internal/helpfulhints/numberofpages.txt'); 
   $somenumber=rand(1, ($configFile*1)); 
   $filename='http://wiki.mysite.com/doku.php?id=internal:helpfulhints:hint'.$somenumber.'&do=export_xhtmlbody'; 
  
   echo file_get_contents($filename); 
 ?> 
  <br /> 

</body></html>

and here is the Javascript version:

<html><head><title>Helpful Hints</title> </head> 
<body> 
<script lang="javascript"> 
function file_get_contents( url ) { 
	    // http://kevin.vanzonneveld.net 
	    // +   original by: Legaev Andrey 
	    // %        note 1: This function uses XmlHttpRequest and cannot retrieve resource from different domain. 
	    // %        note 1: Mainly here for study purposes. 
	    // %        note 1: To avoid browser blocking issues's concider using jQuery's: $('#divId').load('http://url') instead. 
	    // *     example 1: file_get_contents('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm'); 
	    // *     returns 1: '123' 
	  
	    var req = null; 
	    try { req = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { 
	        try { req = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { 
	            try { req = new XMLHttpRequest(); } catch(e) {} 
	        } 
	    } 
	    if (req == null) throw new Error('XMLHttpRequest not supported'); 
	    
	    req.open("GET", url, false); 
	    req.send(null); 
	    
	    return req.responseText; 
	} 
	 
	 
	var numberofpages = file_get_contents('http://wiki.mysite.com/doku.php?id=internal:helpfulhints:numberofpages&do=export_raw'); 
	var randomnumber = Math.floor(Math.random()*numberofpages)+1; 
	 
	var message = file_get_contents('http://wiki.mysite.com/doku.php?id=internal:helpfulhints:hint'+randomnumber+'&do=export_xhtmlbody'); 
	 
	document.write(message); 
	 
	</script> 
	<br /> 
	 
	</body></html>

Thanks!

Resource for understanding working of web application

Vishnu Nath23-Feb-09 3:35

Vishnu Nath

23-Feb-09 3:35

Hii,
Am new to ASP.net.
And am very curious to know from where could i get the required resource to understand the life cycle of page when it is requested to server to the time, when server responses back to browser in asp.net 2.0.
I want to know in depth about what process takes place at server.
How server process page request and all in details.
Where could i get these understanding from?
Can anyone refer me to a site where probably i could download some free e book or any presentation which gives me full understanding on the process taking place between a request submitted to server, to response received from server in depth/detail.
Guide me, if any one can for this topic to better understand asp.net. Smile | :)

Aspiring Techie,
Vishnu Nath

Re: Resource for understanding working of web application

ToddHileHoffer23-Feb-09 4:00

ToddHileHoffer

23-Feb-09 4:00

http://msdn.microsoft.com/en-us/library/ms178472.aspx[^]

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Session in classes

mehrdadc4823-Feb-09 3:26

mehrdadc48

23-Feb-09 3:26

Hi.
How could I access session in a pure class (not a webForm)

Best wishes

Re: Session in classes

Vimalsoft(Pty) Ltd23-Feb-09 3:32

Vimalsoft(Pty) Ltd

23-Feb-09 3:32

You cant.

Call a Function that needs the value from the Session Variable in your Page and pass in the Value from the Session variable in your page and it will pass the Value to the Class Function or Method

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.tiyaneProperties.co.za
vuyiswa@its.co.za
www.ITS.co.za

Re: Session in classes

Greg Chelstowski23-Feb-09 3:34

Greg Chelstowski

23-Feb-09 3:34

My best guess:

object zObj = System.Web.HttpContext.Current.Session["MyVariable"];

var question = (_2b || !(_2b));

Re: Session in classes

ToddHileHoffer23-Feb-09 4:00

ToddHileHoffer

23-Feb-09 4:00

using System;
using System.Web;

public static class SessionItems
{
public static string YourSessionValue
{
get
{
Object result = HttpContext.Current.Session["YourSessionValue"];
if (result == null)
return null;
else
return (string)result;
}
set { HttpContext.Current.Session["YourSessionValue"] = value; }
}

}

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shoe Euro sign in gridView Items

mehrdadc4823-Feb-09 3:23

mehrdadc48

23-Feb-09 3:23

Hi.
How could I add a Euro sign at the end of items of a coloumn of a gridview.
I have added the & euro ; (not seperted) at the end of my items, but it shows the & euro ; string itself, not the sign.

Best wishes

Re: shoe Euro sign in gridView Items

Anurag Gandhi23-Feb-09 3:37

Anurag Gandhi

23-Feb-09 3:37

Hi,
Try doing it in RowDataBound event.
I guess you will be able to do it there successfully.

Anurag Gandhi.
http://www.gandhisoft.com
Life is a computer program and every one is the programmer of his own life.

Radio Button Selection

Sarfaraj Ahmed23-Feb-09 2:50

Sarfaraj Ahmed

23-Feb-09 2:50

Hello Everybody
I have 4 radio button on my page and their Group Name grpSelection.
'On button click' How do I know which radio button is seleted?

Thanks
Sarfaraj

Sarfarj Ahmed

Re: Radio Button Selection

Sneha Bisht23-Feb-09 2:54

Sneha Bisht

23-Feb-09 2:54

string name="";
if(rad1.checked)
{
name = "I selected";
}
else if(rad2.checked)
{
name = "II selected";
}
else if(rad3.checked)
{
name = "III selected ";
}
else
{
name ="IV selected" ;
}

but this code use when no of radiobutton i9s less otherwise use radiobuttonlist .

Error with foreach in aspx

Brendan Vogt23-Feb-09 1:22

Brendan Vogt

23-Feb-09 1:22

Hi,

What is wrong with the following code?

<ul>
<% foreach (TaskList.Task task in ViewData.Model) %>

<li>
<%= task.EntryDate.ToShortDateString() %>
</li>
</ul>

It compiles fine, but when I run it then the following error displays:

foreach statement cannot operate on variables of type 'object' because 'object' does not contain a public definition for 'GetEnumerator'

Regards,
Brendan

Re: Error with foreach in aspx

Greg Chelstowski23-Feb-09 1:50

Greg Chelstowski

23-Feb-09 1:50

Is ViewData.Model a collection of TaskList.Task objects?
Wink | ;)

var question = (_2b || !(_2b));

Yummy, classic ASP

Ennis Ray Lynch, Jr.23-Feb-09 4:50

Ennis Ray Lynch, Jr.

23-Feb-09 4:50

Cheat and use the asp:Repeater for lists like this it looks more ASP.NETy. As for the runtime error that is mostly caused by enumerating on a type without an enumerator. Remember, unfortunately, declarative programming turns compile time errors into run time errors.

Need custom software developed? I do C# development and consulting all over the United States.

If you don't ask questions the answers won't stand in your way.

Doing a job is like selecting a mule, you can't choose just the front half xor the back half so when you ask me to do a job don't expect me to do it half-assed.

ASP.NET MVC show all files not working

Brendan Vogt23-Feb-09 0:44

Brendan Vogt

23-Feb-09 0:44

Hi,

When I click on the show all files button to see my code behind then it shows the bin and debug folder, but not my code behind for the aspx files. Does anybody know why this happens, or am I doing something wrong?

Thanks
Brendan

Re: ASP.NET MVC show all files not working

Brendan Vogt23-Feb-09 19:09

Brendan Vogt

23-Feb-09 19:09

When I create a new MVC view page this what the top of the page lookslike:

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %>

There is no code behind attribute. What am I doing wrong?

Re: ASP.NET MVC show all files not working

kadaoui el mehdi23-Feb-09 21:46

kadaoui el mehdi

23-Feb-09 21:46

on ASP.NET MVC the Code Behind class was replaced by Controller class, each view has a Controller

Javascript Replace

mehrdadc4823-Feb-09 0:43

mehrdadc48

23-Feb-09 0:43

I want to replace a specified subString is a string by javascript.
I don't know the exact substring part, just I know it starts with <layer>

Best wishes

Re: Javascript Replace

Ray Wampler23-Feb-09 4:42

Ray Wampler

23-Feb-09 4:42

The string object in JavaScript has a replace method, so if you need to do more than a simple replace then we'd need some details.

From http://www.w3schools.com/jsref/jsref_replace.asp[^]:

Syntax
stringObject.replace(findstring,newstring)

Parameter Description
findstring Required. Specifies a string value to find. To perform a global search add a 'g' flag to this parameter and to perform a case-insensitive search add an 'i' flag
newstring Required. Specifies the string to replace the found value from findstring

If you need to simulate the .startsWith function in JavaScript then here's an article that demonstrates how to do so using regular expressions:

http://www.tek-tips.com/faqs.cfm?fid=6620[^]

If you need to do something different then let us know.

Regards,

Ray Wampler
www.RayWampler.com

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