There is no foreach in JavaScript, use for … in instead

Programmer should be familiar with command foreach, which function is to iterate item within array or collection. This command normally available on most language, vb, php, c, java. Unfortunately, there is no foreach on JavaScript, and I just notice that until few minutes writing this post. After some research and reading over the javascript manual, I found that for … in is replacement for foreach

for … in
This command basically will iterate any object within an array, but instead refer to it’s collection object this command would pass only the key for collection object.

Syntax:

for (variable in object)
statement

Example

Please pay more attention on bolded italic text

child_cities=states[selected_state];
for(var cityid in child_cities)
{
ddl_city.options.length++;
ddl_city.options[ddl_city.options.length-1].text=
child_cities[cityid].description;
ddl_city.options[ddl_city.options.length-1].value=
child_cities[cityid].cityid;
}

How to opt-in our autoresponder subscriber and run other code simultaneously

 

 

 

 

 

 

To support one of my internet business I decided to use autoresponder service, unfortunately I was not dare enough to invest lots money for Aweber or GetResponse, 2 names listed as top leader on autoresponder business. So I decide to use cheap one, and money does matter. This cheap one didn’t give capability to do opt-in other than using their form, which is bad, because I also need to capture user information on my own database.

So, what I did:

1. Record my user information into database

2. Pass this information into HTML forms that  mimic opt-in form
3. Auto submit the form

It work fine for me.

The code itself is very simple as below, I use PHP and I assume we all already know how to insert into database, redirect and pass information to another form.

 

I use “display:none” to hide opt-in form, so forwarding process become seamless

   1:  <div style="display:none">

   2:  <form class='subscription_form' id='subscription_form' name="subscription_form" method='POST' action='####FORM_POST_URL####'>

   3:  <div align='center'><center>

   4:  <p>Full name<br><input type='text' name='full_name' size='20' value='<?php echo $name; ?>'></p>

   5:  </center></div>

   6:  <div align='center'><center>

   7:  <p>E-mail address<br><input type='text' name='email' size='20' value='<?php echo $email; ?>'></p>

   8:  </center></div>

   9:  <div align='center'><center>

  10:  <p>Phone #1<br><input type='text' name='phone1' size='20' value='<?php echo $phone; ?>'></p>

  11:  </center></div>

  12:  <input type='hidden' name='capitals' value='1'>

  13:  <input type='hidden' name='subscription_type' value='E'><div align='center'><center>

  14:  <p><input type='submit' value='Go »'></p>

  15:  </center></div>

  16:  <input type='hidden' name='id' value='5250'>

  17:  <input type='hidden' name='full_name_man' value='1'>

  18:  <input type='hidden' name='phone1_man' value='1'>

  19:  </form>

  20:  <div>

  21:   

  22:  </div>

  23:   

  24:  <script language="javascript" type="text/javascript">

  25:   

  26:  function init_form()

  27:  {

  28:      document.forms["subscription_form"].submit();

  29:  }

  30:   

  31:  window.onload=init_form;

  32:   

  33:  </script>

K2, a workflow and business process management on Microsoft Platform

Few weeks back, I was lucky to experienced training for K2, a business process management software released by SourceCode Inc. There were 3 classes I attended, K2 Fundamental, K2 Integration and K2 API Programming.

K2 offers product to help increase business efficiency and simplify work. It basically synergize both technical and non-technical by converting business process to software programming through a visual block diagram. K2 Visual Tools allow people to automate process and streamline operations

Good things I like about this BPM is its capability to deal with many data resource and populate them all into one single virtual storage called as SmartObject. It also provide seamless integration with Sharepoint, which is good, especially for a corporate who already invest much on Microsoft Platform.

Copy code as HTML on Visual Studio, easy way to copy code on blogspot

I just notice that blogspot has limited capability on doing blog for programming code. Copy and paste from word also won't work properly as blogspot will not tolerate some whitespace character generated by Word. Luckily, on the net I found something that can address this issue.

Guy Burstein, provide a link to Microsoft Visual Studio AddIns that will allow us to copy any code that we highlight within Visual Studio and paste it automatically as HTML code. This will be helpfull lot on writing a code blog on blogspot, eventough we have to use manual HTML code still and it's exclusively to Visual Studio :)

So, here are steps to doing this:

1. Obtain AddIns here

2. Extract it to your Visual Studio AddIns folder, it's should be under MyDocuments\Visual Studio 2008\Addins, if you couldn't find AddIns folder, then create new one

3. Open Visual Studio, click on Tools -> AddIn Manager


4. AddIn manager dialog will be opened, select to activate "Copy as HTML" AddIn


5. Now, you can select any code and when do right click, "Copy as HTML" will be shown

Below is the result :)

  195 Public ReadOnly Property Email() As String

  196             Get

  197                 Dim daUser As New UserTableAdapter

  198                 Dim ret As String = ""

  199                 Dim users() As String = {}

  200                 Dim i As Integer = 0

  201 

  202                 For Each row As SecurityApprovalRow In Me.Rows

  203                     If Array.IndexOf(users, row.UserId) < 0 Then

  204                         Array.Resize(users, i + 1)

  205                         users(i) = row.User.Email

  206                         i += 1

  207                     End If

  208                 Next

  209                 Return IIf(users.Length = 0, "", String.Join(";", users))

  210             End Get

  211         End Property

Nice isn't ? Try it, code with smile :)

Flip your windows screen permanently

This one maybe not related with programming, but it may a funny trick that we could use to punk someone with. Okay, from Windows operating system (I use Windows XP SP2)  on working mode, means it's not locked state, pres Ctrl+Alt+[Any arrow], and your screen direction will follow arrow you are pressed, for instance to flip your screen 180 degree, press Ctrl+Alt+[down arrow] :)

 

So, say, you have someone that you crush on him/her, you can silently flip his/her screen, and then when he/she notice that something wrong with his/her monitor and get stuck on how to make it like it used to be, you may appear as hero who save the day ... code with smile.

How to do check and uncheck all record on ASP.Net GridView using JavaScript and ASP.Net

When we accessing common webmail site like Gmail, Yahoo!mail or Hotmail, we will see a feature that allow us to select all message listed with a single click, either on a link says "Check All" or a checkbox that will trigger same action somewhere on its header, for the same if want to uncheck them. To do such feature above on ASP.Net Application, I would say impossible with just using standard control, ASP.Net GridView for instance, you would need to get enhanced control or else programmatically coding it in your application :)

On every application that was built by our team, we try to as much as possible not to do it on server side, as it will increase data round trip which as we all know will reduce application performance. So, combination of ASP.Net, Ajax and JavaScript come as a solution.

First we need to have to add TemplateField on GridView to show CheckBox, in our approach we also use a CheckBox on this column header to trigger Check/UnCheck operation by bind a JavaScript function on this CheckBox's OnChange event.

Next, we will need to write down JavaScript function that will be used to perform Check/UnCheck operation, our code is as follow:

var checkMes = new Array();

function addCheckMe(checkMe_CtlId)
{
checkMes.length++;
checkMes[checkMes.length-1]=checkMe_CtlId;
}

function doCheckUncheckAll()
{
var tmpCheckMe;
var checkAll=$get("CheckAll");

for(i=0;i { tmpCheckMe=$get(checkMes[i]); tmpCheckMe.checked=checkAll.checked; }
}

You may see, we have one array to store list of checkbox, a function to fill that array and another function to trigger Check/Uncheck operation.

Okay with done with defining checkbox and JavaScript thing, next we need to call addCheckMe function within our ASP.Net code as GridView will define checkbox dynamically, so ... we add a function to handle GridView's RowDataBound event

protected void grd_RowDataBound(object sender, GridViewRowEventArgs e)
{

string addCheckMeScript = "";
CheckBox CheckMe = (CheckBox)e.Row.FindControl("CheckMe");
if (CheckMe != null)
{
ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), String.Format("OnGrdCheckMeRegister_{0}", e.Row.RowIndex), String.Format("addCheckMe('{0}');", CheckMe.UniqueID.Replace("$","_")), true);
}
}

And voilla we get as we have expected ... code with smile :)

How to make an ASP.Net application offline within second

Sometime it neccesary to make an application offline, it may possible due to code upgrade process or essential data upload. Before ASP.Net framework 2.0 era, normally we will place a code on global.asa or global.asax to set a application variable to indicate offline status to true, then programatically read this status and redirect to specific page to inform if an application is offline.

There is an approach to make it simple for a developer to make its application offline on ASP.Net 2.0, by using app_offline.htm. Simply just design a page using standard HTML editor and named it as app_offline.htm then place this file on root of application that you would offline it.