C # using structs to get JSON data

Recently made payment, to get the user's OpenID, call the interface after the return of the JSON format of data, I want to in C # backstage to take out the data, check online, find the following methods:

1. First call the interface, to have a post data to the specified URL and return the data function:

    protected string Postxmltourl (stringstring  postdata)    {        string"";         using New System.Net.WebClient ())        {            "POST", PostData);        }         return returnmsg;    }

The data format of the post can be

URL parameter format (a=1&b=2&c=3 ...)

XML Format (<xml>....</xml>)

The data format returned is determined by the interface.

2. Method invocation:

        string " appid= " " &secret= " " &code= " " &grant_type=authorization_code " ;         string requestData = Postxmltourl ("Https://api.weixin.qq.com/sns/oauth2/access_token  ", Post_data);

The data returned by this interface is in JSON format, so the resulting requestdata is a JSON string:

{   "Access_token":"Access_token",   "expires_in":7200,   "Refresh_token":"Refresh_token",   "OpenID":"OPENID",   "Scope":"SCOPE"}

The returned data contains the OpenID I need, and the next step is to use the struct to remove the OpenID. First define the structure body:

     Public structAuthorization { Public stringAccess_token {Get;Set; }//The name of the property must be the same as the "key" value in the JSON format string.          Public stringexpires_in {Get;Set; }  Public stringRefresh_token {Get;Set; }  Public stringOpenID {Get;Set; }  Public stringScope {Get;Set; } }

Convert JSON data to an object type using the class JavaScriptSerializer of the serialized data:

        New JavaScriptSerializer ();   // instantiate a class        that can serialize data Authorization auth = js. Deserialize<authorization> (requestData);    // Convert JSON data to object type and assign value to auth

Such a transformation, the object auth inside the 4 attributes will be the corresponding value, so I get the interface returned to the OpenID, you can use it where needed:

        Wxobpay.openid = Auth.openid;

C # using structs to get JSON data