sample 4 msbte paper of awt subject soluion

Compiled By Prof. Vaibhav Vasani

Sample Paper 4 (MSBTE)

Q1 Attempt any four:

A)List 4 Advantages of DOTENET Technology. Ans. .NET Framework Advantages

The .NET Framework offers a number of advantages to developers. i)Consistent Programming Model :-

Different programming languages have different approaches for doing a

task. The difference in techniques comes from how different languages interact with the underlying system that applications rely on.

With .NET, for example, accessing data with a VB .NET and a C# .NET looks very similar apart from slight syntactical differences. there is more than one way to do a particular task within the same language.

The .NET explains that there's a unified means of accomplishing the same task by using the .NET Class Library, a key component of the .NET

Framework. The functionality that the .NET Class Library provides is available to all .NET languages resulting in a consistent object model regardless of the programming

language the developer uses. ii) Direct Support for Security :-

Consider an application that accesses data on a remote machine or has to perform a privileged task on behalf of a non privileged user. In this scenario

security is much more important as the application is accessing data from a remote machine.

With .NET, the Framework enables the developer and the system

administrator to specify method level security. It uses industry-standard protocols such as TCP/IP, XML, SOAP and HTTP to facilitate

Distributed application communications. This makes distributed

computing more secure because .NET developers cooperate with network security devices instead of working around their security limitations.

iii) Simplified Development Efforts :-

ASP.NET and the .NET Framework simplify development by separating

the application logic and presentation logic making it easier to maintain the code.

You write the design code (presentation logic) and the actual code (application logic) separately

code. ASP.NET can also handle the details of maintaining the state of the

controls, such as contents in a textbox, between calls to the same ASP.NET page.


Another advantage of creating applications is debugging. Visual Studio .NET and other third party providers provide several debugging tools that

simplify application development. The .NET Framework simplifies debugging with support for Runtime diagnostics.

iv) Easy Application Deployment and Maintenance :-

The .NET Framework makes it easy to deploy applications. In the most

common form, to install an application, all you need to do is copy the application along with the components it requires into a directory on the target computer.

The .NET Framework handles the details of locating and loading the components an application needs, even if several versions of the same

application exist on the target computer.

The .NET Framework ensures that all the components the application

depends on are available on the computer before the application begins to execute.

B)List DataType Supported by VB.NET with their Storage byte length Ans.

DataType Size in Bytes

Byte 1

Char 2

Integer 4

Long 8

Short 2

Single 4

Double 8

String variable

Date 8

Boolean 2

Object 4

Decimal 16

C)Compare Procedure and Function used in VB.NET with Example.

Ans.

Sub Procedures

Function

Sub procedures are methods which do not return a value

Function returns a value

Declared with the Sub keyword Declared with the Function keyword


the statements within it are executed

until the matching End Sub is encountered

the statements within it are executed

until the matching End Function is encountered

Example of a Sub Procedure: Module Module1

Sub Main () „Sub procedure Main () is called by default Display ()

„Sub procedure display () which we are creating End Sub

Sub Display ()

System.Console.WriteLine ("Using Sub Procedures")

„Executing sub procedure Display () End Sub

End Module

Example on Functions: Imports System. Console

Module Module1 Sub Main ()

Write ("Sum is" &” " & Add ()) 'Calling the function

End Sub

Public Function Add () As Integer

'Declaring a function add

Dim i , j as Integer 'Declaring two integers and assigning values to them

i = 10 j = 20 Return ( i + j)

'Performing the sum of two integers and returning its value End Function

End Module

d)What is XML and Describe creation of XML file. Ans.


XML (Extensible Markup Language) is a set of rules for encoding documents electronically.

It is defined in the XML 1.0 Specification produced by the W3C and several other related specifications; all are fee-free open standards.

XML unlike HTML allows us to create our own Tags.

XML is case sensitive language. XML can be use to store data as like in database. The XML schema contains whole information about the relation structure. It

contains information regarding table, constraints and relation.

Creation of XML file. In VB.NET XML file can be added to any Solution

1. Right clicking on Solution in Solution Explorer 2. Click on “Add new item” 3. Then select XMLFile.xml From window which is displayed

4. Then XML file is added in project

XML Declaration XML documents may begin by declaring some information about them, as in the following example.

<?xml version="1.0" encoding="UTF-8" ?>

Example

Here is a small, complete XML document, which uses all of these constructs and concepts.

<? xml version="1.0" encoding='UTF-8'?>

<Students> <Student> <Name>ABC</Name>

<Roll>11</Roll> </Student>

<Student> <Name>PQR</Name> <Roll>22</Roll>

</Student> </Students>

e)What is Web Application State necessity of Web Application? Ans.


A web application is an application that is accessed via a web browser over a network such as the Internet or an intranet. The term may also mean a computer

software application that is hosted in a browser-controlled environment (e.g. a Java applet) or coded in a browser-supported language (such as JavaScript, combined

with a browser-rendered markup language like HTML) and reliant on a common web browser to render the application executable.

Web applications are popular due to the ubiquity of web browsers, and the convenience of using a web browser as a client, sometimes called a thin client.

The ability to update and maintain web applications without distributing and installing software on potentially thousands of client computers is a key reason for their popularity, as is the inherent support for cross-platform compatibility.

Common web applications include webmail, online retail sales, online auctions, wikis and many other functions.

Browser applications typically require little or no disk space on the client,

upgrade automatically with new features, integrate easily into other server-side web procedures, such as email and searching. They also provide cross-platform compatibility (i.e., Windows, Mac, Linux, etc.) because they operate within a

web browser window.

These programs allow the user to pay a monthly or yearly fee for use of a software application without having to install it on a local hard drive.

f)What are Method, Event, Collection, Object in ASP.Net?

Ans. Methods:

Represent the object‟s built-in procedures. It is set or block of Statements. You define methods by adding procedures, Sub routines or

functions to your class. Two types of method are

Sub-Procedure: A procedure with no return value

Function: A procedure with return value

Event: Events allow objects to perform actions whenever a specific occurrence

takes place. For example when We click a button a click event occurs and we

can handle that event in an event Handler.

Collection:

A namespace is a collection of different classes. All VB applications are developed using classes from the .NET System namespace. The namespace


with all the built-in VB functionality is the System namespace. All other namespaces are based on this System namespace

Object:

Object is an instance of a class; Object contains properties defined by class Multiple objects of same class can be created like variables and destroyed Each class defines DataType

Q2. Attempt any three:

1. Describe if and select case statement with example. Ans:

If If conditional expression is one of the most useful control structures which allows us to execute a

expression if a condition is true and execute a different expression if it is False. The syntax looks like

this: If condition Then

[statements] Else If condition Then [statements]

- -

Else [statements] End If

Understanding the Syntax If the condition is true, the statements following the Then keyword will be

executed, else, the statements following the ElseIf will be checked and if true, will be executed,

else, the statements in the else part will be executed.

Example: Imports System.Console

Module Module1 Sub Main() Dim i As Integer

WriteLine("Enter an integer, 1 or 2 or 3") i = Val(ReadLine()) 'ReadLine() method is used to read from console


If i = 1 Then WriteLine("One")

ElseIf i = 2 Then WriteLine("Two")

ElseIf i = 3 Then WriteLine("Three") Else

WriteLine("Number not 1,2,3") End If End Sub

End Module

Select....Case Statement The Select Case statement executes one of several groups of statements depending on the value of an

expression. If your code has the capability to handle different values of a particular variable then you can use a Select Case statement. You use Select

Case to test an expression, determine which of the given cases it matches and execute the code in that matched case. The syntax of the Select Case statement looks like this:

Select Case testexpression [Case expressionlist-n

[statements-n]] . . . [Case Else elsestatements]

End Select Example:

Imports System.Console Module Module1

Sub Main() Dim keyIn As Integer

WriteLine("Enter a number between 1 and 4") keyIn = Val(ReadLine()) Select Case keyIn

Case 1 WriteLine("You entered 1")

Case 2 WriteLine("You entered 2") Case 3

WriteLine("You entered 3") Case 4 WriteLine("You entered 4")


End Select End Sub

End Module

2. Write VB.NET application using command button and textbox to read number and calculate factorial of the number.

Ans: Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles Button1.Click Dim s As String

Dim i, f As Integer f = 1 i = 1

s = TextBox1.Text While i <= s

f = f * i i = i + 1 End While

TextBox1.Text = "Factorial is :" & f End Sub

End Class

3. Explain the purpose of data adapter control. How does a data adapter differ from a connection? What is Dataset? Ans:

The DataAdapter is the class at the core of ADO.NET‟s disconnected data access. It is essentially the middleman facilitating all communication between the database and a Dataset.

The DataAdapter is used either to fill a DataTable or Dataset with the data from the database with it‟s Fill method. After the memory –resident data

has been manipulated the DataAdapter can commit the changes to the database by calling the Update method. The DataAdapter provides four properties that represent database commands:

1. Select Command 2. Insert Command

3. Delete Command 4. Update Command

Difference between DataAdapter and Connection The Connection object creates the connection to the database whereas the DataAdapter is used to fill the DataTable or Dataset with Data.


There are two types of Connection objects provided by.NET:

1. SqlConnection 2. OledbConnection

The DataAdapter provides four properties that represent database commands: 1. Select Command 2. Insert Command

3. Delete Command 4. Update Command

DataSet: The Dataset is a disconnected in-memory representation of data. It can

be considered as a local copy of the relevant portions of the database. The Dataset is persisted in memory and the data in it can be manipulated and updated independent of the database. When the use of this dataset is finished,

changes can be made back to the central database for updating. The data in Dataset can be loaded from any valid data source like

Microsoft SQL server , an Oracle database or from Microsoft Access Database. 4. Write VB.NET project to display name in drop down list, when user select a

name display the data for the rest of the field in bound label from publisher table from the Biblio.mdb database file.

Q.3.Attempt any 3

(a) What is Transaction and how transaction database is designed?

Ans:

“A Transaction is an atomic unit of work that either fails or succeeds as a

whole”. In a transaction there can be many things to do, like update one thing,

delete another, send email, response query and so on. If transaction is

successful, all of these things will be done or executed as the case may be or if

transaction fails then none of them will be executed.

When a transaction is successful, it is said that this transaction has

committed and all the tasks that it had to do will be done.

If there is some error then the whole transaction will be brought back to

its original state and none of task that it had to do will be completed, it is

called rolling back of the transaction.

Transactions are always executed as a „whole‟. A transaction symbolizes

code or a set of components or procedures which must be executed as a unit.


All the methods must execute successfully or the complete unit fails. A

transaction can be described to cover the ACID properties for mission critical

appliances.

(b) Explain the steps necessary to bind single control such a label to field

in a dataset.

Ans:

1. Open the new windows application in visual studio 2005

2. Place the label control from toolbox on the form.

3. Select the text option of data-binding property of label.

4. While selecting text option it will ask for data-source, select „add

project data-source‟.

5. After that, choose data-source type as Database from Data source

Configuration Wizard and click NEXT .

6. Choose Data-Source Connection by clicking on New Connection

button, further it will display the Add Connection dialog box, in that

choose the Database file name by selecting the browse button and then select

the respective database file.

7. Test the connection to database through Test Connection Button.

8. After the test connection is succeeded, choose your database object by

selecting the field from the table which u want to bind to the label

control. Then click on Finish button.

9. Since the Database have been included, now it will show the Other

Data sources option in the text property. In that select the other data sources,

project data sources, Dataset, data table, Field.

10. At last, run your windows application. It will display the respective

field in the label.


(c)The Rnebook.mdb database file holds two table, the book table and

subject table. The subject table has only two fields: the subject code(the

key) and the subject name. write a project that display the subject table in

grid.

Ans: 1. Open the new windows application in visual studio 2005

2. Place the Data-Grid control from toolbox on the form.

3. Select the Data-source property of Data-Grid Control.

4. While selecting Data-source option it will ask for data-source, select

„add project data-source‟.

5. After that, choose data-source type as Database from Data source

Configuration Wizard and click NEXT .

6. Choose Data-Source Connection by clicking on New Connection

button, further it will display the Add Connection dialog box, in that

choose the Database file name by selecting the browse button and then select

the respective database file.

7. Test the connection to database through Test Connection Button.

8. After the test connection is succeeded, choose your database object by

selecting the table which u want to bind to the Data-Grid control. Then click on

Finish button.

9. It will show the Binding source including the name of table.

10. At last, run your windows application. It will display the respective

table in the Data-Grid.


4. Create a web project using ASP.NET to display 10 pages on web document

using content linker also describe content linking list file.

Q.4 Attempt Any Four.(16)

a. What is CLI, CLR, CTS, CLS, IL, JIT related to DOT NET framework ?

ANS:-

Comman Language Runtime (CLR) :- The runtime engine that executes managed code. It provides core

services such as Memory and thread management , type verification and

garbage collection ; consequently, developers no longer have to worry about

such things when it comes to managed code.

Running code under CLR isolates it from the operating system,

which improve security and robustness. Managed code is complied into the

CPU –independent MSIL (Microsoft Intermediate Language) instruction set,

which is then converted to CPU specific code by runtime. Unmanaged code

runs outside of the runtime and lacks the security of managed code. A major

goal of the .Net framework is to promote and facilitate code reusability.

Just In Time Complier (JIT):- At execution time, a just in time (JIT) Complier translates the MSIL

into native code. The process like this, when .NET programs are executed, the

CLR activates the JIT complier. The JIT complier translates MSIL into native

code on demand basis as each part of the program is needed.

Comman Type System (CTS):-


To support multiple languages on a single CLR and have the ability

to reuse the FCL, the types of each programming language must be compatible.

This binary compatibility between language types is called the Comman Type

System(CTS).

Because the CLR is controlling your source code anyway . The

.NET framework does this through its common type system(CTS), which defines

all of the core data types and data mechanism used in .NET programs. This

includes all numeric, string and Boolean value types. It also defines the object,

the core data storage unit in .NET.

The CTS divides all data objects into two buckets. The First bucket

called VALUES TYPES, and the second bucket contains REFERENCE TYPES.

Comman Language Specification (CLS):- For programming languages to communicate effectively, targeting

IL is not enough. There must be a common set of standards to which every

.NET language must adhere. This common set of language features is called

the Comman Language Specification(CLS). The CLS defines a minimum set of

features that a language must implement before it is considered to be .NET

compliant or more accurately, CLS- compliant.

Microsoft Intermediate Language (MSIL):- When the .NET program is compiled, the output of compiler is not

an executable code but a file that contains a special type of code called

Microsoft Intermediate Language (MSIL).This MSIL defines a set of portable

instructions that are independent of any specific CPU. It‟s the job of CLR to

translate this intermediate code into excitable code when program is executed

making the program to run in any environment for which the CLR is

implemented. And thus the .NET Framework achieves Portability.

b. Describe the process of connecting to SQL server database; Olebd

datasource.

c. create a web page for entering the new customer Information. Validate

that all fields contain Information.

ANS:-

<%@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 runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<h1>New Customer Information</h1>

<div style="table-layout: fixed">

<asp:Label ID="Label1" runat="server" Style="left: 330px; position:

absolute; top: 208px"

Text="EMAIL"></asp:Label>



Text="PASSWORD"></asp:Label>

<asp:TextBox ID="TextBox1" runat="server" Style="left: 447px; position:

absolute;

top: 135px"></asp:TextBox>


absolute;



absolute;


top: 353px" TextMode="Password"></asp:TextBox>


absolute;

top: 429px" TextMode="Password"></asp:TextBox>


absolute;




Text="USERNAME"></asp:Label>



Text="NAME"></asp:Label>



Text="CONFIRM"></asp:Label>

<asp:Button ID="Button1" runat="server" Style="left: 441px; position:


Text="SUBMIT" />

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"

ControlToValidate ="Textbox1" Text="You must enter the name"

ErrorMessage="RequiredFieldValidator" style="left: 655px; position: absolute;

top: 130px"></asp:RequiredFieldValidator>


ControlToValidate ="Textbox2" Text="You must enter the user email"

ErrorMessage="RequiredFieldValidator"

Style="left: 648px; position: absolute; top:

200px"></asp:RequiredFieldValidator>



ControlToValidate ="Textbox3" Text="You must enter the username"





ControlToValidate ="Textbox5" Text="You must enter the same password to

confirm" ErrorMessage="RequiredFieldValidator"




ControlToValidate ="Textbox4" Text="You must enter the Password"




</div>

</form>

</body>

</html>

OUTPUT:-


d. Write Asp.Net form to display code of displaying information of C drive.

Ans:-

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"







</head>

<body>


<div>

<%

Dim fso = Server.CreateObject("Scripting.FileSystemObject")

Dim d = fso.getDrive("C:\")

Response.Write(" <br/>Availble space on c: is : " & d.availableSpace)

Response.Write(" <br/>Drive Letter of c: is : " & d.driveLetter)

Response.Write("<br/>Drive Type is : " & d.driveType)

Response.Write("<br/>Free space on c: is : " & d.freeSpace)

Response.Write("<br/>File System on c: is : " & d.fileSystem)


Response.Write("<br/>Path Of c: is : " & d.path)

Response.Write("<br/>Readiness of drive: is : " & d.isReady)

%>

</div>

</form>

</bod

OUTPUT:-

e. What is post back? When does it occur? How can you keep a web

application from recreating list data when a post back occurs?

ANS:

This property is used to check whether the page is being loaded and

accessed for the first time or whether the page is loaded in response to the

client postback.

When an event is triggered, for instance, a button is clicked, or an item

in a grid is selected, the page is submitted back to the server for processing,

along with information about the event and any preexisting data on the page

(via view state). We say the page “posts back” to the server. This is a powerful


concept to grasp because it is postback that lets us run code on the server

rather than on the client‟s browser, and it is postback that lets our server code

know which items within a drop-down list were selected, or what information a

user typed into a text box.

But what would happen if you had multiple DropDownList controls that

were populated with database data? Users could interact with those

DropDownList controls and, in turn, we could set certain options within the

page based on what they selected from the drop-down menus. Although this

seems like a common task, with traditional ASP it incurred considerable

overhead. The problem is that while the data that‟s bound to the drop-down

menu from the database never changes, every time the user selects an item

from the drop-down menu and a postback has to be done, the database must

be accessed again to rebuild the contents of each drop-down list on the page.

e.g

Make 2 DropDownLists and Write in Default.aspx.vb

Make AutoPostBack=”true” of 2 DropDownLists

Partial Class _Default

Inherits System.Web.UI.Page

Dim fs = Server.CreateObject("Scripting.FileSystemObject")

Dim fs1

Protected Sub Page_Load(ByVal sender As Object, ByVal e As

System.EventArgs) Handles Me.Load

Dim f1

For Each f1 In fs.drives

DropDownList1.Items.Add(f1.driveletter)

Next

End Sub


Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As

Object, ByVal e As System.EventArgs) Handles

DropDownList1.SelectedIndexChanged

DropDownList2.Items.Clear()

Dim loop1 As Integer

Dim str As String

For loop1 = 0 To DropDownList1.Items.Count - 1

If DropDownList1.Items(loop1).Selected Then

str = DropDownList1.SelectedItem.ToString

fs1 = fs.getfolder(str)

End If

Next

Dim fd

For Each fd In fs1.SubFolders

DropDownList2.Items.Add(fd.name)

Next

End Sub

End Class

f. Describe Data grid control of ADO.NET and give example how it is to be

connected with database.

ANS:

A data bound list control that displays the items from data source in a

table. The DataGrid control allows you to select, sort and edit these items.

Different column types determine the behavior of the column ion the

control. The different column types that can be used are as follows:-

BoundColumn


ButtonColumn

EditCommandColumn

HyperLinkColumn

TemplateColumn

Following program demonstrates the connection of database to datagrid:-

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"


<%@ Import Namespace ="System.data.oledb" %>






</head>

<script runat ="server" >

Protected Sub Page_Load(ByVal sender As Object, ByVal e As

System.EventArgs) Handles Me.Load

Dim con As New

OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data

Source=E:\Employee.mdb;")

Dim cmd As New OleDbCommand("select * from emp", con)

con.Open()

DataGrid1.DataSource = cmd.ExecuteReader

DataGrid1.DataBind()

con.Close()

End Sub


</script>

<body>


<div>

<asp:DataGrid ID="DataGrid1" runat="server">

</asp:DataGrid></div>

</form>

</body>

</html>

<asp:datagrid runat="server"></asp:datagrid>

OUTPUT:-

Q. 5. Attempt any three.

a. Describe how to fill data set with data form multiple table. Ans.

A single dataset can contain multiple tables . To create dataset that contain multiple tables by following steps:-


Import the namespaces that are necessary.

Create the connection objects of the databases of tables that you want to fill into one dataset.

Open the connections. Create the command objects . Create the dataAdapter objects which are the same as the number

of tables one wat to fill to one dataset. Create dataset object. Fill the data set using fill method

As follow:= adap1.Fill(datasetobj, "tablename")

fill all the tables using corresponding dataAdapter Object . Drag the datagridviews depending upon the number of tables. Set the datagridview‟s DataSource property to dataset.

Imports System.Data.OleDb

Imports System.Data Public Class Form1

Dim con, con1 As OleDbConnection Dim com1, com2, com3 As OleDbCommand

Dim adap1, adap2, adap3 As OleDbDataAdapter Dim dset As New DataSet

Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

„create the connection

con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\Book.mdb;") con1 = New

OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\employee.mdb;")

„Open the connection con1.Open()

con.Open() com1 = New OleDbCommand("Select * from Book1", con) com2 = New OleDbCommand("Select * from Subject", con)

com3 = New OleDbCommand("Select * from emp", con1) adap1 = New OleDbDataAdapter(com1)


adap2 = New OleDbDataAdapter(com2) adap3 = New OleDbDataAdapter(com3)

adap1.Fill(dset, "Book1") adap2.Fill(dset, "Subject") adap3.Fill(dset, "emp")

DataGridView1.DataSource = dset.Tables("Book1") DataGridView2.DataSource = dset.Tables("Subject")

DataGridView3.DataSource = dset.Tables("emp") End Sub

End Class

OUTPUT:

B. Explain how session object can be used to enabled and disable a

session.

ANS: Disable Session State:


To disable a session state, we have two methods:

1. At the Application Level:

The following steps demonstrate how to disable session state at the

application level,which affects all pages in the application:

1: start Microsoft Visual Studion .NET and create a new ASP.NET Web Application

2: In the Solution Explorer , double -click Web.config to viewthe contents of this file.

3 : Locate the <SessionState> section and set the mode value to off. 4: Save the file and/or the project to disable session state through all pages in the application.

2. At the page Level :

The Following steps demonstrate how to disable session state at the page level ,which affects only the specific pages that enable these changes: 1: Start Microsoft Visual Studio.NET and create a new ASP>NET web

Application. 2: In Solution Explorer, double click the Web Form for which you want to disable session state.

3: Click the HTML tab. 4: At the top of the page, add EnabledSessionState=”false” in the @ Page

directive. The modified attribute should appear similar to the following: <%@ Page language=”c#” Codebehind=”WebForm1.aspx.cs” AutoEventWireup=”false”%>

5. Save the fil;e and/or project to disable session throughout all pages in the application.

3. Enabled Session State :

Similarly you can enable the session state at paghe level using true value for EnablesSession state or at application level by using mode value ON.

Properties of a Session Object

Some of the properties of session object are listed below . 1. Session.TimeOut Property :

The Session.TimeOut property can be used to set the expiration time in minutes for the session . If the user does not refresh the page opr request another page within the alloted time, the session is automatically

terminated and the resources are released. The default is 20 minutes. This property is mostly used in many online banking systems, to avoid misusage.


c.Write ASP.NET code to display all files form all folders of C:

Ans:

Partial Class _Default Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object, ByVal e As

System.EventArgs) Handles Button1.Click Dim fso = Server.CreateObject("Scripting.FileSystemObject")

Dim j, k Dim a = "d:"

Dim d = fso.getDrive(a) Dim fd = fso.getfolder(d)

For Each j In fd.subfolders

Response.Write("<b><u>" & "+" & j.name & "</u></b>") Response.Write("<br/>") Response.Write("<br/>")

For Each k In fd.files Response.Write(" - " & k.name)

Response.Write("<br/>")

Next Response.Write("<br/>") Response.Write("<br/>")

Next End Sub End Class

OUTPUT:


d.Describe the method and properties of Application object with supporting example. ANS:

Methods and properties of Application object : Methods:

1. Application.Set Method :

Set an application state object by name or index. Syntax : Application.Set(Key,item)

Example : Setting the application veriables.

2. Application .Count method : This method is used to count the number of items (variables) of

application objects.

Example : Returns all the application keys.


3. Application .Lock Method :

The Lock method prevents all other users from making change in

any of the variables in the Constents collection of the Application object. Application objects are designed to allow only one user at a time to make changes and you do this by locking everybody else out.

It is used to unlock the Application object after it has been locked with the Lock method. If you do not unlock the application it will be unlocked after application ends or when a timeout is received.

Syntax: Application.Lock

4. Application .UnLock Method : The Application lock method can be used to lock the application object so that no actions take place on the server. The Unlock method

is used to explicitly unlock the variables in the collection of the Application object.

In contrast , the lock method prevents all other users from changing any variables in the contents collection of the Application object. While the application is locked, no pages will be served to

visitors and no ASP code will be run. If you do not unlock the applokcation it will remain locked.

Syntax: Application.UnLock

5: Application.RemoveALL() Method: This Method can be used to remove all items from an Application Object . It does not take any parameter or returnk

anything.

6: Application.Remove(name|index) Method:

This method can be used to remove specific items from Application Object .You may use only one of the two possible choices for mandatory

argument. Syntax: Application.Remove(Name or Integer)

The name argument of the item to be deleted. It must be enclosed in a pairs of quotes. The Integer argument is the position number of the item in the

collection to be deleted. The numbering swquence for a collection start at one, not zero

Q. 6. Attempt any 3

1. Describe server object used in asp programming.


2. Create an advertisement for 4 companies using ADRotator Oject. 3. Write steps for binding datagrid to a control step by step.

4. What is parameterized query, when is it used , when multiple adapters are needed illustrate with example.

sample 4 msbte paper of awt subject soluion

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