Tutorial 5 Conditional Statement in Dot Net

1. IF Statement

This is the most common operator for NAV developers and we use it with BEGIN END statement for every multiple line conditions. So its very common in Dot Net also.

It is very common for all programming language.

2. ELSE IF Statement

If we use, only if statement then all the conditions will be followed either they are true or not. So for program structure we must use this example.

Note : What is the difference between && and & operator?

&& operator does not check all conditions and if first condition is true then code block will excute.

For E.g.

IF (A && B && C) THEN

{

   Code block execution

}

If A is TRUE then code block will execute 

IF (A & B & C) THEN

{

    Code block execution

}

For this code execution all A B C conditions needs to be completed.

Same is true for || and | OR Operator.

3. SWITCH - CASE Operator

This operation is similar to NAV Switch Case. FOR Example :

Dot Net Tutorial 4 Starting with Array

Why we need Array ?

Instead of defining the multiple variables we can define multiple variables in 1 and we can complete our task easily.

How to define Array in Dot Net ?

Note : In NAV , we only need to provide an integer as dimensions in properties.

Example :

Using this Code we define an array and handle all operation in Array.

Note : Size of Array is constant. We will use collections classes in later blogs where we will can handle this constant size disadvantage in dot net.

How many types of comments are there in Dot Net ?

1. Single Line : It is done with // back Slash.

2. Multiple Line Comment : It is done with /* */.

3. XML Documentation Comment : It is done with triple back slash. /// 

Dotnet Tutorial 3 Operators

Operators

1. Assignment

2. Arithmetic Operators

3. Comparison Operators

4. Conditional Operator

5. Ternary Operator

Default Values of Data Types in Dot Net:

1. Null Value Type : Int , Float , Boolean , structs , enum etc.

2. Reference Value Type : Class,Interface,Delegates,Arrays etc.

Like in NAV , we generally dont care about default values of Variables and simply use CLEAR Function. But in Dotnet you need to be very curious about nullable value because you are going to use database anyhow to store and record the result.

Database concept is containing NULL value so how can we do this in Dotnet because here we need to work with variables like int and it can't contain Null value directly.

See this , how we can simply put ? after variable and can store null also in a variable.

Convertion of One DataType to Another DataType :

Yes , Its seriously required in Dotnet programming. Normally we dont need this functionality too much in NAV programming.

Simply we need to use Convert.Datatype.

NORMALLY WE ONLY USE format IN NAV.

Use Of Parse and TryParse

Parse : This function is used for converting the datatypes but it can give you Error if conversion is not successful.

TryParse : This function is will not throw error and program will run smoothly without stoping the process.