how to create a json object in vb.net 2005

Question

I want to create a json object in vb.net to send the response back javascript function to do something please tell me if anyone have any idea about it.

Answer 1

As you're using .NET 2.0 you have to use the JSON libary by James, with download at Codeplex (version for .NET 2.0).

An example of using Json.NET

1. Add a reference to Newtonsoft.Json, and an Import Newtonsoft.Json in your class.

2. How to serialize an object (Product is only an example object, change this to your own object):

   Dim product As New Product()
   product.Name = "Apple"
   product.Expiry = New DateTime(2008, 12, 28)
   product.Price = 3.99D
   product.Sizes = New String() {"Small", "Medium", "Large"}
   
   'Call SeralizeObject to convert the object to JSON string'
   Dim output As String = JavaScriptConvert.SerializeObject(product)
   

The output variable will hold the value:

{
  "Name": "Apple",
  "Expiry": "\/Date(1230375600000+1300)\/",
  "Price": 3.99,
  "Sizes": [
    "Small",
    "Medium",
    "Large"
  ]
}

Another example would be to convert an array of strings.

Dim myArray As String() = {"Hello", "World"}
Dim jsonString As String = JavaScriptConvert.SerializeObject(myArray)