Gridview : Check/Uncheck Check boxes in Gridview – Without paging

In this post we are going to see how to check/uncheck check boxes in the row, when the Header Row check box checked/unchecked. This is the most common scenario for all the programmers. The below code works fine with the grid view where the pagination is disabled. 

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Learn By Experience: SMS Gateways

                   In this post I’m going to discuss about the most common question I found in ASP.Net forum. The question is “How to send SMS from my asp.net application?”. This is one of the frequent question I found in my experience with ASP.Net forum. 

                   Earlier I also, asked that kind of question. So here I’m going to give a detailed explanation.

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Visual Studio Tips & Tricks - 5 : Class Library – An Introduction

                      Class Library is a one of the project type offered in Visual Studio. Normally a class library contains class definition or interface. If we use the class library in projects we can gain the below advantages:

•             Provide a single DLL regardless of class files. That is a class library contains number of class files. But the output of the class library is a Single “DLL” (Dynamic Link Library) File.
•        The main purpose of the class library comes into picture in a layered architecture projects.For example, a web project contains various layers (such as Business and Data Access Layers). If we use a separate class library for each layer, in this case if any layer changed we just compiled that particular layer and get the dll and replace it in Production environment.  At these times, class library project type are best option.

Readers do you have any tip? Please use comment.

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My Blogging Journey So For

                            Few years ago, around 2011, at one night I decided and started blogging about ASP.Net technologies. I’m diehard fan of WWE (World Wrestling Entertainment), as of now I’m a huge fan of John Cena. From his slogan “The Champ Is Here” I pick up the name “Champ” and put it my blog. This is how I named my blog.

The Champ Is Here!

                At Initial stage I’m not a serious blogger. But from the year 2013, onwards I decided to do something to the ASP.Net community. So that I decided to post article in a regular basis. As of now I’m serious about this.

Since its starting, my blog goes up and down. As of now I have crossed over 8000+ views. (thanks to everyone who helped to achieve this height.

               Apart from blogging, I’m a member of the ASP.Net forums where I can contribute to the community directly as much as I can.

               My blog traffic also increased during this year after I post in a regular intervals. You can see the result in the below figure. Recently i have changed the UI of this website and mapped from blogger to the custom website.

Overall Growth of my website

              Normally I got nearly 1000+ page views per month, which is very low compare to other blogs, but I’m happy with my work.

In future also I really want to do the same to the ASP.Net community.

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IIS Tips & Tricks # 2: Set Default page for a website in IIS

                         In few websites, if we type the website name, (like www.someurl.com) it will automatically loaded the page www.someurl.com/index.aspx . This is because of the setting of the “Default Document” feature of IIS. 

                           In this post we are going to discuss about this feature of IIS.

1. Open IIS, by type the command “inetmgr” in Run window.
2. Select “Default Document” and click.
3. In the feature view, we can see some type of Document orderly kept.

Default Document - Feature View

          The top most had the high priority and the last one had least priority.
As per the above figure, the document “Default.htm” had the high priority, the file “Default.aspx” had the lowest priority. Which means whenever the user types a url (like www.someurl.com) then IIS look any one of the file exist in the above order on that Virtual Directory. If it finds any one of the file, it will load that page.

         IIS also allow, add/remove the custom default document per website. For example if we are specify a page (say home.htm) as the default document which does not exist in the website then IIS will look into that website and Alert the user as shown below, which explicitly state that that each time when we type the url IIS will look in that order. 

Add Custom Default Document

            So as per the alert, it is advisable to move the default document at the top level, which will increase the performance in the sense IIS can avoid to go further down in the list.

Readers, do you have any other tip, please comment me.

Hope this helps!

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Visual Studio Tips & Tricks: 5 - Hexa Decimal values displayed during Debug the application

                  Recently, I had a wired problem in Visual studio. In this post i’m going to discuss about it. The problem is, when I try to debug my application in Visual Studio 2010, the values are displayed in Hexadecimal format. Please take a look into the below picture.

Values of Variable Displayed in Hexa Decimal Format

The reason is somehow the “Hexadecimal Display” option has been checked in the “Watch” window.

“Hexadecimal Display” option in Watch Window

So that all the values are displayed in Hexadecimal form in watch window too.

So just disable the “Hexadecimal Display” in the watch window’s float menu. The display will correctly display in the decimal form.

Values of Variable Displayed in Decimal Format

Hope this helps someone!

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VB.Net : A Word about “Nothing”!

                              It’s a common misunderstand of a new programmer in vb.net about the keyword “Nothing”. The main purpose of this keyword is set the default value for an variable type. For example,the default value  for  the  Boolean type variable is “False”. In some cases, we may want to set the default value of that type of the variable. At that time, Nothing keyword comes into picture.

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim strString As String = "Sample String"
        Dim intVar As Integer = 100
        Dim decVar As Decimal = 100.01
        Dim dblVar As Double = 100.233
        Dim blnVar As Boolean = True
        ' Set the variable's Default value by using Nothing 
        strString = Nothing
        intVar = Nothing
        decVar = Nothing
        dblVar = Nothing
        blnVar = Nothing
        lblResult.Text = "Default value of String variable: " & strString & vbCrLf & _
                        "Default value of Integer variable: " & intVar & vbCrLf & _
                        "Default value of Decimal variable: " & decVar & vbCrLf & _
                        "Default value of Double variable: " & dblVar & vbCrLf & _
                        "Default value of Boolean variable: " & blnVar & vbCrLf

    End Sub

Just copy the above code under the Button's click event. Hope this hepls a bit!

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VB.Net ByRef Variable : A Small Warning

In VB.Net, programmers often used the variable by reference using the keyword ByRef. Normally, reference variables not copied like Value type variables. There are some scenarios arise to use or pass a variable as reference to another function/subroutine and change them within the function/subroutine.

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Create Virtual Directory in IIS

                  In previous posts I have explained how to create a virtual directory from Visual Studio.
In this post I’m going to tell how to create a virtual directory in IIS.
What is Virtual Directory?:
Virtual directory meant that, it is a mapping between the actual web application files and IIS. That is we map the website files to the IIS in Virtual Directory. If you see in IIS, it look like a directory but it actually points the exact web application path.
Create Virtual Directory:
Here I’m going to create a virtual directory in IIS for the web application which is located in the path :
“G:\DotNetExamples\AllInOne”.
Step 1:
Open IIS. To open IIS, press windows key + R key, which opens “Run” window and type “inetmgr” and press enter, which opens the IIS.

Step 2:
In IIS, Right click on the “Default Web Site” and select the “Add Application” in the float menu.

Step 3:
In this “Add Application” window, we need to specify the “Virtual Directory” name and the physical directory where the actual web site files are located. Leave the application pool as is. Click OK.

Step 4:
Now the Virtual Directory has been created under the “Default Web Site”. To test the application Right click the virtual directory and choose “Manage Application à Browse” which will open the application in the respective default browser.

Hope this helps!

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Code Obfuscation

          In this post I’m going to discuss about Reverse engineering and Code Obfuscation. In modern programming trends, when we publish a website or dll file to a client machine, there are lot of chance to theft our code. That is if we publish a class library as a dll, there are lot of tools available for simply reverse engineer that dll. So that the person can see the source of such files, which is a potential thread for software companies who does not want to share the source code to the end user.

Below are the some tools which is used to decompile the dll:

Dot net reflector – From Redgate

Dot net decompiler (Dot Peek) – From Jetbrains

Just Decompile – Free tool From Telerik 

ILSpy

DisSharper

Mono Cecil

Kaliro

Dotnet IL Editor (DILE)

Common Compiler Infrastructure

What is Obfuscation?

                   Obfuscation is a process to convert the (source code or machine) code into a difficult form which cannot easily read by humans.

Eventhough, obfuscation does not guaranteed 100 % of code safety. However it will make the process too hard, that is getting the source from the dll or exe. In my professional life, I have experienced with DeepseaObfuscator tool.

Here are the list of Obfuscation Tool for .Net:

Spices.Net Obfuscator

Salamander .NET obfuscator

Skater .NET Obfuscator Freeware Light Edition

Dotfuscator

CodeVeil

Crypto Obfuscator

FxProtect - .NET Obfuscator

DevExtras - Obfusasm

Eazfuscator .NET

Hope this helps!

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Team Foundation Server : Part 2

                     In previous post I have give some points about TFS. Today in my organization I have attended a meeting regarding  Team Foundation Server. I have already told that TFS is awesome product from Microsoft. That is 100% true. I think TFS going to be a huge successful one in future like Visual studio.

In this post I would like to add some new features of TFS 2012 which I learned from the above conference: 

1. IntelliTrace
2. Code clone detection
3. Feedback Manager
4. Version Controlling
5. Storyboard creation
6. Automatic Build update
7. Shelving 

In the forth coming posts I will explain the above in detail.

Happy programming!

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Team Foundation Server 2012 – An Introduction

TFS – An Introduction:

                          In my organization, we have recently started using Team Foundation Server 2012. Previously we have worked on the Visual Source Safe for version controlling. Adopting with this new technology is hard at first. After using day by day, it’s awesome. Now I felt that TFS is really awesome product from Microsoft.

TFS not just give an option for version control. Its gives more apart from version controlling like branching etc.  The below are the few important advantages of TFS. If I, missed or added wrongly feel free to contact me or leave a comment.

• With branching we can easily merge the changes between the projects.
• We can control the entire project activity with TFS.
• We can define the source code standards (here called policies) and check against the source code we wrote in Visual studio. That is if any of the code violates the coding standards, we can easily figure it out with this feature.
• We can assign task to entire team and fill the completed and completion dates.
• The above are the some  advantages of TFS. In the feature articles I will give the detail explanation of TFS. Keep in touch!

Hope this helps to understand the basic of TFS.

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ASP.Net: Format Number into 2 digits Using Java script

               In this post we are going to see that how to formatting the number entered in the server side text box.

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm1.aspx.vb" Inherits="Blogging.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        // This function is called when the focus moved from Text Box
        function formatNumber() {
            // Get the Controls value
            var strAmount = document.getElementById("<%=txtAmount.ClientID%>").value;
            // Replace the prefix and suffix spaces
            var dblAmount = strAmount.replace(/^s+|s+$/g, '');
            //check the input is not a empty string
            if (dblAmount != '') {
                // check the input is a valid number
                if (isNaN(dblAmount)) {
                    // Alert the User
                    alert("Please enter only whole number");
                    // Clear the values
                    document.getElementById("<%=txtAmount.ClientID%>").value = "";
                }
                else {
                    // Append zeros
                    var strAmount = dblAmount + "." + "00";
                    //strAmount = strAmount.replace(/^s+|s+$/g, '');
                    document.getElementById("<%=txtAmount.ClientID%>").value = strAmount;
                }
            }
        }
        // Called when the focus set on the Text Box
        function removeZeros() {
            // Get the Controls value
            var strAmount = document.getElementById("<%=txtAmount.ClientID%>").value;
            // Replace the prefix and suffix spaces
            strAmount = strAmount.replace(/^s+|s+$/g, '');
            // Replace the Zeros and Dot
            var dblAmount = strAmount.replace(".00", "");
            //check the input is a valid number
            if (dblAmount != '') {
                // check the input is a valid number
                if (isNaN(dblAmount)) {
                    alert("Please enter only whole number");
                }
                else {
                    // Assign the value to text box
                    document.getElementById("<%=txtAmount.ClientID%>").value = dblAmount;
                }
            }
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    Enter A Whole Number :
    <asp:TextBox ID="txtAmount" runat="server" onblur="formatNumber();" onfocus="removeZeros();">
    </asp:TextBox>
    </form>
</body>
</html>

Let’s have a look at that line:

<asp:TextBox ID="txtAmount" runat="server" onblur="formatNumber();" onfocus="removeZeros();"></asp:TextBox> 

Which declares ASP.Net text box,  with 2 client side events “onblur” and “onfocus”.

Onfocus – used to call a javascript function when the focus set on that control. That is when you click on the text box this will fired.

Onblur – Used to call a javascript function when the focus is moved to next control. When the user press tab key this event triggered.

         In the javascript functions “formatNumber” and “removeZeros” I have used some regular expression to remove the leading and trailing spaces.

I have previously explained the purpose of ClientID in this post.

To run this program, just copy and paste that code in a webform and hit F5.

Please go thru the comments in the javascript for better understanding.

Provide your valuable comments to improve my articles.

Hope this helps a bit!

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Visual Studio Tips &Tricks: 4 – Solution File Not Found

                  Last night I have tried to add a Blank Solution and then to add a website under that solution. First I have added that blank solution. Solution added successfully. When I added the Website under that solution, then the Solution has been hidden only website alone displayed in Solution Explorer.

Website With out Solution

To Bring the Solution file, go to the Tools -> Option Menu.

Select “Projects and Solutions” and check the check box with the text “Always show solution”. 

Option Window in Visual Studio

That’s all now the solution file displayed in the top of web site like below.

Website with Solution

Hope this helps a bit!

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Visual Studio Tips &Tricks : 3 – Ctrl+, - File Search Easy

                 Whenever the project grows large it’s hard to take the necessary file in Visual studio. That is we need to traverse a lot of folders or sub folders if we know the file where it was exactly. 

                  Sometimes, when you deployed in a new project, if another user just mention a file name and ask you take a look about particular logic its really painful to find that file where it was located exactly.

                   At these times the hot key combination Ctrl + , (Control Key with Semicolon) comes a handy. Which opens “Navigate To” window in which if we started type it will list down the file name in a quicker manner. So that we can pick up the file easily.

Navigate To - Window 

                   It not only listed the File names, it also list down the method name too. So whether you search a method or File use the 
shortcut key Ctrl+, and navigate quicker.

Please give your valuable comments which improves my future articles!

Hope this helps a bit!

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Access ASP.Net Server Control in Client Side Using Javascript

              Some time, we have a situation to access the server side ASP.Net controls and its values using Client side script like java script.  In this post I’m going to explain how to do that with a simple example.

A word about Client ID:

              As all of us know, that server side controls are submitted and processed by the ASP.Net engine, which emits the respective HTML to the browser. At that time the ASP.Net engine takes the server controls and provide ID (which can be varied across asp.net versions) for it.

            Consider the below example, which has 3 text boxes, after entered values in first 2 text boxes when the user clicks the button then javascript function called which will add the values and put it in 3^rd text box. These controls are Server controls.

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        function Add() {
            var intFirstNo = document.getElementById("<%= txtFirstNo.ClientID %>").value;
            var intSecondNo = document.getElementById("<%= txtSecondNo.ClientID %>").value;
            var intResult = parseInt(intFirstNo)  +  parseInt(intSecondNo);
            document.getElementById("<%= txtResult.ClientID %>").value = intResult;
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <table>
<tr>
            <td>
                Enter First Number:
            </td>
            <td>
                <asp:textbox clientidmode="Predictable" id="txtFirstNo" runat="server"></asp:textbox>
            </td>
        </tr>
<tr>
            <td>
                Enter Second Numer:
            </td>
            <td>
                <asp:textbox id="txtSecondNo" runat="server"></asp:textbox>
            </td>
        </tr>
<tr>
            <td>
                Addition is:
            </td>
            <td>
                <asp:textbox id="txtResult" runat="server"></asp:textbox>
            </td>
        </tr>
<tr>
        <td align="center" colspan="2">
        <asp:button id="btnResult" onclientclick="Add(); return false;" runat="server" text="Calculate">
        </asp:button></td>
        </tr>
</table>
</form>
</body>
</html>

Consider this java script line:

var intFirstNo = document.getElementById("<%= txtFirstNo.ClientID %>").value;

                When the above line is read by the ASP.Net engine, it will search the Server control ID “txtFirstNo” and get the respective client ID, which has been assigned by ASP.Net engine.  In other words, ASP.Net get the Client ID for that Server control “txtFirstNo” and substitute there in between the double quotes. As a result when we saw the view source of the page we can read that above one as follows:

var intFirstNo = document.getElementById("txtFirstNo").value;

We also return false (in line no 42) after call the javascript function "Add" to avoid the postback when we click the button.

Just copy the above sample in a webform and try it yourself!

Please leave your valuable comment which improves every Article!

Hope this helps a bit! 

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Work Around: Break Point Not Hitting in Visual Studio

                In my professional experience with Visual studio sometimes break point doesn’t hit when we attached to the Worker process. It just tells that Symbols are not loaded.

                 The below are the possible workaround to solve this problem (Try it one by one in this case):

1. Clean and Rebuild the Solution/Project.
2. Close all the windows using Window -> “Close All Documents” and restart the Visual Studio. Then Build/Rebuild the Solution/Project.
3. Go to the Temporary Folder (which is available in the .Net Framework installed Location) and clean the Temporary files of that Solution/Project. Kill the worker process and rebuild the solution.

Hope this helps a bit!

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Visual Studio Tips & Tricks: 2 – Create Virtual Directory Problem

                     Few days ago, I just want to create a virtual directory for my ASP.Net web project. I just go to the “Solution Explorer” and “Right click” on the Web project in the floating menu choose the “Properties” of the Web project.

Project Properties Float Menu

              In the Properties page, Select “Web” Tab and select the option “Use Local IIS web Server” and then click “Create Virtual Directory” button. At that time the below error occurred:

Unable to create the virtual directory. To access local IIS Web sites, you must run Visual Studio in the context of an administrator account.

Virtual Directory Creation Error

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Learn By Experience: Be Aware: Static (C#)/Shared (VB) Variables

                              It’s a common programming mistake all the programmers use the static/shared variables in a class. The programmer cannot identify the problem when it was used in a single user desktop application. But when you come to the web, which is a multi-user environment you will strangely come across problems. For example, one user’s data may be viewed or data may be colloid with other user’s data. 

                       Few months ago, I also encountered the same problem in a project. The main problem is that static/shared variables has been used in that particular code behind file.  So what happened is, if more than one logged in user view and edit data on that page on the same time data has been interchanged or overlapped with other user data.

                        It doesn’t mean that shared/static variables are not to be use. But using inside a class, is need more attention. The above problems are perfect live examples. 

                        We can use the Shared/Static variables in that case we need to track the number of page visits or need to be access across the classes. But be aware such kind of situations.

I hope this post help a little to refine your coding!!

Happy Coding!!

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ASP.Net MVC - An Introduction

What is MVC?

             Several Months ago, I just started to learn new technologies in order to teach other thru a weekly technical session in my current company. So I decide to lean ASP.Net MVC. These points are from my learning.

So what is ASP.Net MVC?

             According to Microsoft, ASP.Net MVC is a new paradigm to design a website using Model, View and Contoller Pattern. The first 3 letters of Model, View and Controller forms the name MVC. However MVC newly introduced in ASP.Net but MVC is not a new framework it has been already used in Java and PHP etc.

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