asp.net parse json array - asp.net

Question

I write this code for read json in httphandler:
var jsonSerilizer = new JavaScriptSerializer();
var jsonString = String.Empty;
context.Request.InputStream.Position = 0;
using (var inputStream = new StreamReader(context.Request.InputStream))
{
jsonString = inputStream.ReadToEnd();
}
and my json string is:
{"r_id":"140","name":"d","count":"5","c_id":"150"}
and i use this method for parse json string:
JavaScriptSerializer j = new JavaScriptSerializer();
dynamic a = j.Deserialize(jsonString, typeof(object));
string r_id = a["r_id"];
string Name = a["name"];
string count = a["count"];
string c_id = a["c_id"];
up code parse my json string to :
r_id:140
name:d
count:5
c_id:50
When client send me array of string json for example :
{"r_id":"140","name":"d","count":"5","c_id":"150"}
{"r_id":"150","name":"der","count":"50","c_id":"150"}
i can parse up json string
How can i?
I use this code:
var jsonSerilizer = new JavaScriptSerializer();
var jsonString = String.Empty;
context.Request.InputStream.Position = 0;
using (var inputStream = new StreamReader(context.Request.InputStream))
{
jsonString = inputStream.ReadToEnd();
}
File.AppendAllText(#"d:\status\LOL.txt", "GetJSON to FROM:"+ jsonString+"\r\n", Encoding.UTF8);
JavaScriptSerializer j = new JavaScriptSerializer();
dynamic a = j.Deserialize(jsonString, typeof(List<ClientMessage>));
foreach (var obj in a)
{
File.AppendAllText(#"d:\status\LOL.txt", obj.name + "\r\n", Encoding.UTF8);
}
but when program recieve to File.AppendAll.. program crash and down.

Answer 1

First of all try to create a model ( class to hold your objects) like this :
Class ClientMessage {
public string r_id {get;set;}
public string name {get;set;}
public string count {get;set;}
public string c_id {get;set;}
}
In this case you would receive a List , so try to do it like this :
JavaScriptSerializer j = new JavaScriptSerializer();
dynamic a = j.Deserialize(jsonString, typeof(List<ClientMessage>));
// and then iterate on your object
foreach (var obj in a)
{
//start assigning values
}

Answer 2

I would suggest creating an object you can parse your JSON into, so something like:
public MyClass {
public int r_id { get; set;}
public string name { get; set; }
// etc
}
This will allow you to parse directly into that object, like this:
var results = j.Deserialize<List<MyClass>>(jsonString);

Answer 3

Can you try something this code, I am assuming you are getting json data like below.
[
{
r_id: "123",
name: "deepu",
count:"5",
c_id:"150"
},
{
r_id: "444",
name: "aaa",
count:"25",
c_id:"55"
},
{
r_id: "5467",
name: "dfgdf",
count:"5",
c_id:"3434"
}
]
I am using the above Client Message class here and adding JsonProperty attribute.
public class ClientMessage
{
[JsonProperty("r_id")]
public string RId { get; set; }
[JsonProperty("name")]
public string Name { get; set; }
[JsonProperty("count")]
public string Count { get; set; }
[JsonProperty("c_id")]
public string Cid { get; set; }
}
Finally, get the json data fort testing, I am reading the data from external file..
var data = System.IO.File.ReadAllText("jsondata.txt");
var jsResult = JsonConvert.DeserializeObject<List<ClientMessage>>(data);
NOTE : You need to add Newtonsoft.Json reference in your project