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Controller.Json Method (Object, String)

.NET Framework 4

Creates a JsonResult object that serializes the specified object to JavaScript Object Notation (JSON) format.

Namespace:  System.Web.Mvc
Assembly:  System.Web.Mvc (in System.Web.Mvc.dll)
'Declaration
Protected Friend Function Json ( _
	data As Object, _
	contentType As String _
) As JsonResult

Parameters

data
Type: System.Object
The JavaScript object graph to serialize.
contentType
Type: System.String
The content type (MIME type).

Return Value

Type: System.Web.Mvc.JsonResult
The JSON result object that serializes the specified object to JSON format.

The data parameter must be serializable. The JavaScriptSerializer class is used to serialize the object. The result object that is prepared by this method is written to the response by the MVC framework when the object is executed.

The following example shows how to send JSON-formatted data to the browser.

Public Function TestJsonContent() As ActionResult 
    Return View("TestJson") 
End Function 

<AcceptVerbs(HttpVerbs.Post)> _ 
Public Function TestJsonContent(ByVal numDays As Integer) As ActionResult 
    Dim list As New List(Of Double)() 
    
    For d As Double = 0 To numDays - 1 
        list.Add(d + 0.5) 
    Next 
    
    Return Json(list, "text/x-json") 
End Function
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