微信小程序获取二维码API

<%@ WebHandler Language="C#" Class="ce" %>

using System;
using System.Web;
using System.Net;
using System.Text;
using System.IO;
using System.Collections.Generic;
using LitJson;
using System.Web.Script.Serialization;

public class ce : IHttpHandler {

public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
//微信access_tocke
string ulr = "https://api.weixin.qq.com/wxa/getwxacode?access_token=" + this.access_token();

HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(ulr);  //创建url
request.Method = "POST";
request.ContentType = "application/json;charset=UTF-8";
JsonData data = new JsonData();
data["path"] = "'pages/index?query=1";
data["width"] = "430";

string json = data.ToJson();
byte[] load = Encoding.UTF8.GetBytes(json);
request.ContentLength = load.Length;
Stream writer = request.GetRequestStream();
writer.Write(load,0,load.Length);

HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
Stream s = response.GetResponseStream();
byte[] mg = StreamToBytes(s);
context.Response.BinaryWrite(mg);

}

public string access_token() {
string urls = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=1111&secret=1111";
HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(urls);  //请求api
HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
string respText = "";
using (Stream resStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(resStream, Encoding.Default);
respText = reader.ReadToEnd();
resStream.Close();
}
JavaScriptSerializer Jss = new JavaScriptSerializer();
Dictionary<string, object> respDic = (Dictionary<string, object>)Jss.DeserializeObject(respText);
//通过键access_token获取值
return respDic["access_token"].ToString();

}

public static byte[] StreamToBytes(Stream stream)
{

List<byte> bytes = new List<byte>();
int temp = stream.ReadByte();
while (temp != -1)
{
bytes.Add((byte)temp);
temp = stream.ReadByte();
}
return bytes.ToArray();

}

public bool IsReusable {
get {
return false;
}
}

}