在C＃中从POST请求读取和解析JSON数据

Question

I'm doing a POST request via JQuery's Ajax, with the type of data defined as json , containing the values to be posted to server, something like Username: "Ali" .

What I need to do in a Handler, is to read the values, deserialize them to an object named User .

String data = new System.IO.StreamReader(context.Request.InputStream).ReadToEnd();
User user = JsonConvert.DeserializeObject<User>(data);

While debugging, the value of data is the following:

Username=Ali&Age=2....

Now I'm sure this isn't JSON , so the next line would certainly produce an error:

"Unexpected character encountered while parsing value: U. Path '', line 0, position 0."

What is the proper way to read JSON data from POST request?

Client Side

$.ajax({
    type: 'POST',
    url: "http://localhost:38504/DeviceService.ashx",
    dataType: 'json',
    data: {
      Username: 'Ali',
      Age: 2,
      Email: 'test'
    },
    success: function (data) {
    },
    error: function (error) {
    }
  });

Answer 1

Convert your object to json string:

$.ajax({
    type: 'POST',
    url: "http://localhost:38504/DeviceService.ashx",
    dataType: 'json',
    data: JSON.stringify({
      Username: 'Ali',
      Age: 2,
      Email: 'test'
    }),
    success: function (data) {
    },
    error: function (error) {
    }
  });

Answer 2

I am not sure why your datastring is encoded like an url (as it seems).

But this might solve the problem (altough i am not sure)

String data = new System.IO.StreamReader(context.Request.InputStream).ReadToEnd();
String fixedData = HttpServerUtility.UrlDecode(data);
User user = JsonConvert.DeserializeObject<User>(fixedData);

Answer 3

Use This In c# file... Will give you result you require...

string username=Request.Form["Username"].ToString();

Similarly For others... I hope this will help you

Another Answer Or you can send data like this

$.ajax({
                    url: '../Ajax/Ajax_MasterManagement_Girdle.aspx',
                    data: "Age=5&id=2"
                    type: 'POST',
                    success: function (data) {

                    }
                });

ANd get the answer like this in c#

string Age=Request.Form["Age"].ToString();