Setting Combo-box Value and Display Data with VB.Net

I was working on a Brokerage Calculation project where I need to load a table’s data into combo box as in the form of value member and display member because a combo-box store two value ID which not shown at drop down list but reside in combo-box .

We need to Set/Get data through value because it’s mostly primary key and  display mode for display 

field. Take a look on following code:

Dim con As New OleDbConnection(getconstr)

Dim da As New OleDbDataAdapter(sql, con)

What are merits and demerits of array in C?

Q : What are merits and demerits of array in C?

Why we need an array.

We need array when there is a need to process more than data with similar type. For example 

• Taking marks of 10 student needs of ten integer 
• Taking name of more than one character 
• Structure record and many more

Criteria mentioned above can also be achieved through variable , but variables have following drawback which lead to use array instead of Variable.

• Each variable must has unique name which increase complexity when a large number of variables need to make. 
• Each variable load in memory at random order. So if you want to process all variable then you need to process each variable individually because allocation of space is not continuous.

For understand the above point you need to imagine a real life example.

Two close friend group decided to watch a movie and they follow two different approaches as follows

• Friends in Group one purchase ticket individually without any coordination between them for seating arrangement 
• Friend in group two book seats continuously i.e. seats no 1 to 10.

So Group two can make better communication than group one. In same way array works.

Advantage

• Continuous memory allocation.
• Process a collection of similar data type.
• Can be used to make data structure like stack,tree,queue etc.
• Easy to visit each element using index.

Disadvantage

• Static memory allocation 
• Due to static memory allocation number of element cannot be increase nor decrease at run time.
• The elements of array are stored in consecutive memory locations. So insertions and deletions are very difficult and time consuming.

Back to Array Home

Write a C program to find size of structure without using sizeof operator.

Q  : Write a C program to find size of structure without using sizeof operator.

#include<stdio.h>

#include<conio.h>

struct stu

{

     int roll;

     char name[20];

     float marks[3];

};

Write a C program to find the square root of a given quadratic equation.

Q1 : Write a C program to find the square root of a given quadratic equation.

#include <math.h>

int main()

{

    double a, b, c, determinant, root1,root2, realPart, imaginaryPart;

    printf("Enter coefficients a, b and c: ");

    scanf("%lf %lf %lf",&a, &b, &c);

    determinant = b*b-4*a*c;

Write a C program to print given number of terms of a Fibonacci series.

Q 1 :  Write a C program to print given number of terms of a Fibonacci series.

Solution : 

#include<stdio.h>

void main()

{

    int a,b,c;

   c=1;

   a=0;

Write a C program to read a line and print it reverse using recursive function.

Q : Write a C program to read a line and print it reverse using recursive function.

Solution : 

#include<stdio.h>

#include<string.h>

#include<process.h>

void print(int len,char str[])

{

int n=len;

if(n==-1)

exit(1);

Call by value Call by reference

Call by value

The call by value method of passing arguments to a function copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no effect on the argument.

Customized web page print using Java Script

Printing a webpage is another important aspect of web development. If you skip this section then when your user will be print a page then it will print as it is, which not good for all case because we add a lot of formatting images on webpage. So all the things on the page will get printed that will be worse.

Customizing web page output is good practice to make a webpage. Because what we see on web page we don’t need to take output on paper same format so customization is mandatory.

Following example will print table as with custom header.

Roll	Name	City
101	Sona	Vns
102	Amit	Alld
103	Sumi	Alld
104	Rakesh	Vns
105	Jyoti	alld

Stock and Bill Management Project

I have made this project for your practice only this is live project running in whole sale shoes shop. You can use this project as your course final project because I have seen many students who buy project from market or internet so I made this project online for download every one with free of cost. I also suggest student who’re going to make this project as their course project, please take a look on project and understand what the flow of this project working model are. I don’t want to make use this project as shortcut to only submitting your project. No! This is wrong so try to learn some live coding from this project. 

Commercial use of this project without consent  is prohibited.

Project Description

This helps to manage stock and billing of a whole shale shop. Primary this project was design for a shoes shop but it can be apply the business which sells some company project which has further some sub type. All the entry left blank. So you can create your own entry. Some demo records are in download database for sake for understood of project work flow. One you will be understands work flow then you customize this project as your requirement.

Inheritance OOP

Inheritance (Object Oriented Programming)

In object-oriented programming,Inheritance allows us to define a class which is based on another class, which makes it easier to create and maintain an application. This also provides an opportunity to reuse the code functionality and fast implementation time.The derived class is also called subclass and the base class is also known as super-class. The derived class can add its own additional variables and methods. These additional variable and methods differentiates the derived class from the base class.inheritance saves our money and time both because we use predefined compile and tested class which increase quality of software.

Function Pointer

   Function pointer is a type of pointer which points a function or code block. You can assign address of a function to function pointer variable and that function using function pointer variable name.

   I have a bad experience while making Calculator. In my design all the calculation takes place when user pressed equal button. When a user pressed equal button I need to check every time which operator user was pressed , checked by switch case, it become complicated then I increase more function in my calculator because of lots condition for operator check and attached code for particular logic separately.

   Now my work becomes simple because of function pointer because I just need to check operator pressed by user and attached related function code to function pointer. It reduces lots of condition checking and assigns separate code to each section. So function pointer is very useful in some specific scenario.

Advantage of function pointer

• Implement Callback
• Useful in event handling
• One entry point for more than one code block

C language function precedence

Question :

Which of the following is the correct order if calling functions in the below code?a = f1(23, 14) * f2(12/4) + f3();

A) f1, f2, f3
B) f3, f2, f1
C) Order may vary from compiler to compiler
D) None of the above

NIELIT O Level C Language Solve Paper July-15

NIELIT O Level C Language Solve Paper with Answer July-15

1 Objective

1.1 A

Explanation : See operator priority table 
1.2: A

Explanation : Test Yourself By click this link 

1.3 : C

Explanation : Continue statement transfer control to start of loop and when condition will be wrong else stops loop So string will be printed 0 times because its after else statement.

Microsoft Word Mail Merge

Microsoft Word Mail Merge Tutorial in Hindi

Microsoft word has mail merge feature which enable you to make a letter to a huge number of people in an efficient way. Without using mail merge its very

SQL Join Graphics Representation

Inner JOIN

Left JOIN

O Level Solve Paper Jan 16

O Level Solved Paper

January, 2016 M4.1-R4: APPLICATION OF .NET TECHNOLOGY

Solved Paper

Objective Type Answer

1.1 : B
1.2 : C
1.3: D
1.4 : A
Explanation : Supports all classes in the .NET Framework class hierarchy and provides low-level services to derived classes. This is the ultimate base class of all classes in the .NET Framework; it is the root of the type hierarchy.
1.5 : D

Explanation : The IHttpHandlerFactory interface creates and manages HTTP handlers for processing requests. Therefore, you can create a class that implements the IHttpHandlerFactory interface, and then use that class as an HTTP handler.

NIELIT A Level Solve Paper 

Java -July-2016

A10.1-R4: INTRODUCTION TO OBJECT ORIENTED PROGRAMMING THROUGH JAVA

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR”answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Which of the following class is a superclass that declares the common features of GUI
components in packages java.awt and javax.swing?
A) Component
B) Container
C) Panel
D) Frame

Java Solved Paper

NIELIT A Level Solve Paper

Core Java January, 2016

A10.1-R4: INTRODUCTION TO OBJECT-ORIENTED PROGRAMMING THROUGH JAVA

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Which of the following is valid long literal?
A) 0x99fffL
B) ABCDEFG
C) 0x99fffa
D) 99671246

NIELIT A Level Solve Paper

Core Java Solved July, 2015

A10.1-R4: INTRODUCTION TO OBJECT-ORIENTED PROGRAMMING THROUGH JAVA

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 What does the expression 1.0 / 0.0 return?
A) Double.NaN
B) 0.0
C) Run time exception is generated
D) Double.INFINITY

Java Sample Paper

NIELIT A Level Java Soled Paper

January, 2015

A10.1-R4: INTRODUCTION TO OBJECT-ORIENTED PROGRAMMING THROUGH JAVA

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Which one of the following is not an AWT Event class?
A) MenuEvent
B) MouseEvent
C) ActionEvent
D) InputEvent