Json In c# Serialize and Desalinize

Json In C# Example

//create class
public class Grid
{
public string ColName;
public bool ColVisisblity;
public int ColDisplayIndex;
public int Colwidth;
public bool IsGroupCloumn;
public int PrintingColwidth;
}

//Paste this code in button click for Serialize
List eGrid = new List();
Grid g = new Grid();
g.ColDisplayIndex = 0;
g.ColName = "CatName";
g.ColVisisblity = true;
g.Colwidth = 250;
g.IsGroupCloumn = true;
g.PrintingColwidth = 110;
eGrid.Add(g);

Grid g1 = new Grid();

g1.ColDisplayIndex = 0;
g1.ColName = "CatID";
g1.ColVisisblity = false;
g1.Colwidth = 100;
g1.IsGroupCloumn = false;
g1.PrintingColwidth = 60;

eGrid.Add(g1);

string ans = JsonConvert.SerializeObject(eGrid, Formatting.Indented);
textBox1.Text = ans;

//Paste this code in button click for Desalinize
List ab = JsonConvert.DeserializeObject
>(ans);

What is JSON?

• JSON stands for JavaScript Object Notation
• JSON is lightweight text-data interchange format
• JSON is language independent *
• JSON is "self-describing" and easy to understand

JSON uses JavaScript syntax for describing data objects, but JSON is still language and platform independent. JSON parsers and JSON libraries exists for many different programming languages.

JSON - Evaluates to JavaScript Objects

The JSON text format is syntactically identical to the code for creating JavaScript objects.

Because of this similarity, instead of using a parser, a JavaScript program can use the built-in eval() function and execute JSON data to produce native JavaScript objects.

Example Form W3School

JSON Object Creation in JavaScript

Name:  
Age:  
Address:  
Phone:  

Much like XML

• JSON is plain text
• JSON is "self-describing" (human readable)
• JSON is hierarchical (values within values)
• JSON can be parsed by JavaScript
• JSON data can be transported using AJAX

Much unlike XML

• No end tag
• Shorter
• Quicker to read and write
• Can be parsed using built-in JavaScript eval()
• Uses arrays
• No reserved words

Why JSON?

For AJAX applications, JSON is faster and easier than XML:

Using XML

• Fetch an XML document
• Use the XML DOM to loop through the document
• Extract values and store in variables

Using JSON

• Fetch a JSON string
• eval() the JSON string

JSON Syntax Rules

JSON syntax is a subset of the JavaScript object notation syntax:

• Data is in name/value pairs
• Data is separated by commas
• Curly braces hold objects
• Square brackets hold arrays

·         JSON Name/Value Pairs

·         JSON data is written as name/value pairs.

·         A name/value pair consists of a field name (in double quotes), followed by a colon, followed by a value:

·         "firstName" : "John"

·         This is simple to understand, and equals to the JavaScript statement:

·         firstName = "John"

JSON Values

JSON values can be:

• A number (integer or floating point)
• A string (in double quotes)
• A Boolean (true or false)
• An array (in square brackets)
• An object (in curly brackets)
• null

JSON Objects

JSON objects are written inside curly brackets,

Objects can contain multiple name/values pairs:

{ "firstName":"John" , "lastName":"Doe" }

This is also simple to understand, and equals to the JavaScript statements:

firstName = "John"
lastName = "Doe"

JSON Arrays

JSON arrays are written inside square brackets.

An array can contain multiple objects:

{
"employees":

[
{ "firstName":"John" , "lastName":"Doe" }, 
{ "firstName":"Anna" , "lastName":"Smith" }, 
{ "firstName":"Peter" , "lastName":"Jones" }
]

}
In the example above, the object "employees" is an array containing three objects. Each object is a record of a person (with a first name and a last name).

JSON Uses JavaScript Syntax

Because JSON uses JavaScript syntax, no extra software is needed to work with JSON within JavaScript.

With JavaScript you can create an array of objects and assign data to it like this:

Example

var employees = [
{ "firstName":"John" , "lastName":"Doe" }, 
{ "firstName":"Anna" , "lastName":"Smith" }, 
{ "firstName":"Peter" , "lastName": "Jones" }
];

JSON Files

• The file type for JSON files is ".json"
• The MIME type for JSON text is "application/json"