$.ajax JSON data to the background error problem resolution _AJAX related

Copy Code code as follows:

$.ajax ({
URL: ".. /services.ashx ",
Type: "POST",
Data: {' data ': {' typename ': Json.stringify (TypeName)}, ' Operationtype ': ' 2 '},
Data: {' data ': TypeName, ' Operationtype ': ' 2 ', ' nowheight ': nowheight, ' Nowarea ': Nowarea},
Success:function (msg) {}
})

JS code as above, when data in the ' key '-' value ' pairs of the value of null (undefined), when the request is sent, the value of NULL key value is not uploaded to the background,

1, through F12 can see the value of NULL key value pairs do not pass.

2, in the background to use the context. request.form["Name", found that the value is null, if it is obtained, it will also error.