Archive for the ‘ASP.NET’ Category
Project-Based Development and Projectless-Based Development
Introduction
Web Project can be developed of two types
a) Projectless Based Development
b) Project Based Development or web project
Project less Based Development
Creating websites of this form is called project less applications. It has its own advantages over Project Based Development.
The advantages include
a) It simplifies deployment: We can simply copy the files in the website directory to the web server.
b) It simplifies file management: Adding , deleting and moving files is very easy u can just delete, add or move a web page ,there is no need to go through Visual Studio or edit the project file.
c) It simplifies team collaboration: Each team can work independently on different pages.
d) It simplifies debugging: Creating a web project ,you must recompile the entire application when you change a single file With project less development, each
page is compiled separately, and the page is only compiled when you request it for the first time.
Project Based Development or Web Project
Creating project of this form is called Project Based Development or simply Web Project. If we create application of this form Visual Studio generates a number of extra files, including .csproj and .csproj.user project files and .sln solution file.
When you build your application, Visual Studio generates temporary files, which is places in the Obj subdirectory, and one or more .pdb files (in the Bin subdirectory) with debugging symbols. None of these files should be deployed to the web server when your web application is complete. Furthermore, none of the C# source code files (files with the extension .cs) should be deployed, because Visual Studio recompiles them into a DLL assembly.
However both are same once they are deployed to the web server,but they differ in their structure .The difference include
a) Compilation: Web projects are compiled by Visual Studio and not ASP.NET when they run. All the web pages classes is combined into a single assembly that has the name of web project(like web project.dll);
b) Code-behind: The web pages also uses code behind file however they include one additional file with an extension .aspx.designer.cs.
c) Assembly references: In a project less website ,all the assembly references are recorded in the web.config file
Other posts
* Using C# and VB classed together in the App_Code folder :
* Creating Dynamic Linking Library using ASP.NET
* VB Style Calendar in ASP.NET
* Sending SMS from ASP.NET Application
* What is the difference between Server.Transfer and Response.Redirect?
Using C# and VB classed together in the App_Code folder
Introduction
Hi in this article I demonstrate how to use two different classes together in ASP.NET application. As we know ASP.NET application supports more than 24 languages we don’t know how to use two different languages in one single application. One important thing mixing of classes coded in different languages is not allowed with default settings. You can, however, configure your web.config file to get this done. This article is going to explain you that how one can do that.
Creating Sub folders and classes
Create two separate folders one for C# code and one for VB code .Without modifying web.config file if we compile we get an error.
To solve this we should modify web.config file.
protected void CSharpbtn_Click(object sender, EventArgs e)
{
int a = MathematicsClassCSharp.addition(2, 2);
Label1.Text = a.ToString();
}
protected void VBbtn_Click(object sender, EventArgs e)
{
int a1 = MathematicsClassVB.addition(1,1);
Label1.Text = a1.ToString();
}
Disabling Copy Paste in a TextBox
Hi this article is more or less similar to the last article “Restricting the mouse click on a web page” the logic is the same with little intelligence. In this article I will disable the Copy, Paste and Ctrl Functionality of a TextBox, before reading this article I request you to please check the previous article for better understanding.
Restrict Copy and Paste.aspx
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head runat=”server”>
<title>Untitled Page</title>
<script type=”text/javascript” src=”Restrict Copy and Paste.js”>
</script>
</head>
<body>
<form id=”form1″ runat=”server”>
<pre>
Right Click Disabled : <asp:TextBox ID=”TextBoxCopy” runat=”server”
onMouseDown=”DisableRightClick(event)”>
</asp:TextBox>
Ctrl Key Disabled : <asp:TextBox ID=”TextBox2″ runat=”server”
onKeyDown=”return DisableCtrlKey(event)”>
</asp:TextBox><br />
Copy and Paste Disabled: <asp:TextBox ID=”TextBox1″ runat=”server”
oncopy=”return false” onpaste=”return false” oncut=”return false”> </asp:TextBox>
</pre>
</form>
</body>
var buttonright = 2; // button right
function DisableRightClick(event)
{
//For mouse right click
if (event.button==buttonright)
{
alert(“Right Clicking not allowed!”);
}
}
</html>
Restrict Copy and Paste.js
function DisableCtrlKey(e)
{
var code = (document.all) ? event.keyCode:e.which;
var message = “Ctrl key functionality is disabled!”;// look for CTRL key press
if (parseInt(code)==17)
{
alert(message);
window.event.returnValue = false;
}
}
Restricting Mouse Click on a web page
Hi in this article I will explain how to restrict mouse click on a web page ,so that user will not save images just like orkut which restrict user from saving images.Actually this idea I got from my friends project whose one of the module was restricting user from mouse click.I though to share the small snippet with you people ……….check out and please give your valuable suggestion.
The trick is very simple ,it is all done with little JavaScript .
DisableRightClick.jsdocument.onmousedown = mouseDown;
var buttonright = 2; // button right
var msg =“Right Click is not Allowed”;
function mouseDown(e)
{
if (event.button==buttonright)
{
alert(msg);
}
}
DisableRightClick.aspx
|
<html xmlns=”http://www.w3.org/1999/xhtml”> <head runat=”server”> <title>Untitled Page</title> <script type=”text/javascript” src=”DisableRightClick.js.js”> </script> </head> <body> <form id=”form1″ runat=”server”> <div>
</div> </form> <p> <img alt=”" src=”images/naveen.gif” style=”width: 107px; height: 118px” /></p> </body> </html> |
ASP.NET Application Folders
Hi in this article I will explain application folders in ASP.NET 2.0.You would have observed when you create ASP.NET Application you can add folders called application folders, these are special folders in asp.net each one has special purpose and meaning. ASP.NET 2.0 has the capability to automatically precompiled ASP.NET application whereas in 1.0 and 1.1 frameworks everything was compiling into DLL. This is not the case in ASP.NET 2.0 framework this is because of its defined folder structure Let us now examine the usage of each folder in detail.
There are 6 folders which can be added
a) \App_Code
b) \App_Data
c) \App_Themes
d) \App_GlobalResources
e) \App_localResources
f) \App_WebReferences
g) \App_Browsers
Calculator.cs
public class Calculator
{
public int add(int a, int b)
{
return (a + b);
}
public int sub(int a, int b)
{
return (a – b);
}
}
Default.aspx
protected void Page_Load(object sender, EventArgs e)
{
Calculator calc = new Calculator();
int a = calc.add(1, 2);
Label1.Text = a.ToString();
int b = calc.sub(2, 1);
Label2.Text = b.ToString();
}
We can add class file of both .vb and .cs but little trick as to be done, we have to configure web.config file.
<compilation>
<codeSubDirectories>
<add directoryName=”VB”></add>
<add directoryName=”CS”></add>
</codeSubDirectories>
</compilation>
\App_Data
This folder stores the data stores which is utilized by the application.It can contain Microsoft SQL Express files (.mdf files), Microsoft Access files (.mdb files), XML files, and more.
\App_Themes
Themes can provide common look and feel.It can contain .skin file ,css files , images.All these elements is called as theme
\App_Global Resources
Resource files are nothing but no executable text associated with the program,Typically resources are images,icons ,text and auxillary files.Resource files are string tables that can serve as data dictionaries for your applications when these applications require changes to content based on things such as changes in culture. You can add Assembly Resource Files (.resx) to this folder, and they are dynamically compiled and made part of the solution for use by all your .aspx pages in the application.
Now let us create two resource files one for English and other for French.
- English-Resource.resx :It is the default language file using American English
- French-Resource.resx: The second file is for the same text, but in Finnish Language
When someone with a browser culture of fi-FI invokes the page, he sees the information that comes from this file (French-Resource.resx). Everyone else who comes to the site gets the information that comes from the other file (English-Resource.resx).
protected void Button1_Click(object sender, EventArgs e)
{
Label2.Text = Resources.Resource.Response + “” + TextBox1.Text;
}
By changing the language setting of Internet Explorer you can have the response in that language
App_LocalResource
As \App_GlobalResources folder, is used application-wide. If you are not interested in constructing application-wide resources, then we should go for App_LocalResource whose resources can be used for a single .aspx page only.
\App_WebReference
The App_WebReferences folder is a new name for the previous Web References folder used in previous versions of ASP.NET. Now you can use the \App_WebReferences folder and have automatic access to the remote Web services referenced from your application.
\App_Browsers
The App_Browsers folder holds browser files, which are XML files used to describe characteristics and capabilities of these browsers. We can find a list of globally accessible browser files in the CONFIG\Browsers folder under the installation path. In addition, if you want to change any part of these default browser definition files, just copy the appropriate browser file from the Browsers folder to your application’s \App_Browsers folder and change the definition.
Creating Dynamic Linking Library using ASP.NET
Hi in this I article I will describes what exactly a dll is and how to create a dll file in ASP.NET and use the code.
DLL stands for Dynamic Linking Library which contains code and data which can be used by other application .The main advantage of creating dll is the project can be modularized i.e. the project can be divided into several modules each of the module is linked or called by their respective dll. Windows OS implemented some of the files has dll
1) ActiveX(.ocx)
2) Control Panel (.cpl)
3) Device Driver (.drv)
The main advantage of creating dll’s are
- The program can be divided into modules so it will easy for a software developer to integrate.
- It is easy to deploy and installation.
- Many application can share single copy of dll.
Creating dll using ASP.NET
Let us create a basic class of mathematics which contain some of the maths functions like add,sub,multiply.
Open your Visual Studio and migrate File ->New Project ->Class Library
Public Class Class1
Public Function add(ByVal a As Integer, ByVal b As Integer) As Integer
Return a + b
End Function
Public Function subtract(ByVal a As Integer, ByVal b As Integer) As Integer
Return a – b
End Function
Public Function multiply(ByVal a As Integer, ByVal b As Integer) As Integer
Return a * b
End Function
End Class
Once you build a dll file is created ,in the debug folder ,now we will import this dll file into our Windows project.
Create a new Windows Project File -> New Project-> Windows Forms Application.
To make the class library available in the client application, a reference to the .dll needs to be added.To do so Select project ->Add Reference ->Browser ->bin \Debug->OK
Using this code we can access the data which is actually the dll.
Imports Mathematics
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim obj1 As New Class1
Dim result As Integer
result = obj1.add(TextBox1.Text, TextBox2.Text)
MessageBox.Show(“” + result.ToString)
End Sub
End Class
Download
VB Style Calendar in ASP.NET
Hi in this article I will create the old style calendar control which was there in VB 6.0 using little bit of JavaScript check out……..Actually this idea was not mine it was from my professor,any how check out………………
Default.aspx
| <%@ Page Language=”VB” AutoEventWireup=”false” CodeFile=”Default.aspx.vb” Inherits=”_Default” %>
<!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 id=”Head1″ runat=”server”> <script type=”text/javascript”> function displayCalendar() { var datePicker = document.getElementById(‘datePicker’); datePicker.style.display = ‘block’; }
</script> <style type=”text/css”> #datePicker { display:none; position:absolute; border:solid 2px black; background-color:white; } .content { width:400px; background-color:white; margin:auto; padding:10px; } html { background-color:silver; } </style> <title>Calendar with JavaScript</title> </head> <body> <form id=”form1″ runat=”server”> <div>
<asp:Label id=”lblEventDate” Text=”Event Date:” AssociatedControlID=”txtEventDate” Runat=”server” /> <asp:TextBox id=”txtEventDate” Runat=”server” />
<img src=”Images/Calendar.gif” onclick=”displayCalendar()” style=”width: 16px; height: 17px” />
<div id=”datePicker”> <asp:Calendar id=”calEventDate”
Runat=”server” /> </div>
<br /> <asp:Button id=”btnSubmit” Text=”Submit” Runat=”server” />
<hr />
<asp:Label id=”lblResult” Runat=”server” />
</div> </form> </body> </html>
|
Default.aspx.vb
| Partial Class _Default
Inherits System.Web.UI.Page Protected Sub calEventDate_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles calEventDate.SelectionChanged txtEventDate.Text = calEventDate.SelectedDate.ToString(“d”) End Sub
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click lblResult.Text = “You picked: ” & txtEventDate.Text End Sub End Class |
Sending SMS from ASP.NET Application
Hi In this article I am creating an application from which we can send free sms just like www.way2sms.com [Remember you just have registered in way2sms.com before trying this code]. It involes a little trick which I will explain when I am free please excuse for that and I am not explain much about web service I am directly sharing my code which I have implemented for my project check out and please give your feedback.
SMS.aspx
| <%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”SMS.aspx.cs” Inherits=”SMS” %>
<!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>Untitled Page</title>
</head> <body> <form id=”form1″ runat=”server”> <div>
<b>Sending SMS from your ASP.NET Application<br /> <br /> <br /> <asp:Label ID=”Label1″ runat=”server” Text=”User Name”></asp:Label> <asp:TextBox ID=”TextBox4″ runat=”server”></asp:TextBox> <br />
<br /> <asp:TextBox ID=”TextBox5″ runat=”server”></asp:TextBox> <br /> <br /> <asp:Label ID=”Label3″ runat=”server” Text=”Moble Number”></asp:Label> <asp:TextBox ID=”TextBox3″ runat=”server”></asp:TextBox> <br /> <br /> <center>Enter your text :</center> </b></div>
<p style=”width: 698px”> <b <asp:TextBox ID=”TextBox6″ runat=”server” Height=”105px” Width=”296px”></asp:TextBox> </b> </p>
<asp:Label ID=”Label4″ runat=”server”></asp:Label> <asp:Button ID=”Button1″ runat=”server” onclick=”Button1_Click” Text=”Send” /> </form> </body> </html> |
SMS.aspx.cs
| using System;
using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls;
public partial class SMS : System.Web.UI.Page {
protected void Button1_Click(object sender, EventArgs e) { JavaAdd.SendSMS js = new JavaAdd.SendSMS(); string username, password, number, data; data = TextBox6.Text; username = TextBox6.Text; password = TextBox5.Text; number = TextBox3.Text; Label4.Text = js.sendSMSToMany(username, password, number, data);
} }
|
Automatic Update with the Timer
Timer control can be used to update page automaticly . Instead of requiring the user to perform an action in order to trigger updates, the Timer control will initiate the postback automatically.
The Timer control can execute client-side events at precise intervals, such as refreshing an UpdatePanel every x seconds.
Timer-Demo.aspx
| <body>
<form id=”form1″ runat=”server”> <div>
</div> <asp:ScriptManager ID=”ScriptManager1″ runat=”server”> </asp:ScriptManager> <br /> <asp:UpdatePanel ID=”UpdatePanel1″ runat=”server”> <ContentTemplate> <asp:Timer ID=”Timer1″ runat=”server” Interval=”100″ > </asp:Timer> <div style=”border-style:solid;background-color:Aqua;”> <asp:Label ID=”Label1″ runat=”server”></asp:Label> </div> <asp:Button ID=”Button1″ runat=”server” Text=”Button” /> <br /> </ContentTemplate> </asp:UpdatePanel> protected void Page_Load(object sender, EventArgs e) { Label1.Text = DateTime.Now.ToString(); } |
View State
The HTTP protocol, the fundamental protocol of the World Wide Web, is a stateless protocol. Each time you request a web page from a website, from the website’s perspective, you
are a completely new person.
The view state preserves the state (value) between postbacks this is called view state.
Consider these two programs to exactly explain what is view state
ViewState-Enable
In this when ever a user clicks a button the counter value increases because the previous value will be stored in view state in this way the HTTP protocol remembers the value of button.
| <asp:Button ID=”Button1″ runat=”server” onclick=”Button1_Click” Text=”0″ Width=”32px” /> |
protected void Button1_Click(object sender, EventArgs e)
{
Button1.Text = (Int32.Parse(Button1.Text) + 1).ToString();
}
ViewState-Disable
In this when ever a user clicks a button the counter value will not increases because the previous valueis not stores in view state because it is disabled ,so the HTTP protocol doesn’t remember the value.
| <asp:Button ID=”Button1” runat=”server” EnableViewState=”False”
onclick=”Button1_Click” Text=”0″ Width=”32px” /> |
protected void Button1_Click(object sender, EventArgs e)
{
Button1.Text = (Int32.Parse(Button1.Text) + 1).ToString();
}
