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作者：采購(gòu)員乙，來(lái)自原文地址
第一步 獲取access_token：
文檔如下：
http請(qǐng)求方式: GET
https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
代碼如下：
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string result = HttpGet("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx***********d&secret=a*******************4");
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public static string HttpGet(string Url)
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{
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
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request.Method = "GET";
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request.ContentType = "text/html;charset=UTF-8";
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HttpWebResponse response = (HttpWebResponse)request.GetResponse();
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Stream myResponseStream = response.GetResponseStream();
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StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
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string retString = myStreamReader.ReadToEnd();
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myStreamReader.Close();
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myResponseStream.Close();
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return retString;
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}
其中****改成自己的。具體到微信公眾平臺(tái)小程序里設(shè)置開(kāi)發(fā)設(shè)置里找。
第二步 獲取推廣二維碼
文檔：
https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=ACCESS_TOKEN POST 參數(shù)說(shuō)明
參數(shù) 默認(rèn)值 說(shuō)明 path 不能為空，最大長(zhǎng)度 128 字節(jié) width 430 二維碼的寬度 代碼：
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public static void PostMoths(string access_token)
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{
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string _url = "https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=" + access_token;
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string strURL = _url;
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System.NET.HttpWebRequest request;
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request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
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request.Method = "POST";
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request.ContentType = "application/json;charset=UTF-8";
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JsonData _data = new JsonData();
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_data["path"] = "pages/index?query=1";
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_data["width"] = "430";
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string _jso = _data.ToJson();
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//string paraUrlCoded = param;
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byte[] payload;
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//payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
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payload = System.Text.Encoding.UTF8.GetBytes(_jso);
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request.ContentLength = payload.Length;
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Stream writer = request.GetRequestStream();
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writer.Write(payload, 0, payload.Length);
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writer.Close();
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System.Net.HttpWebResponse response;
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response = (System.Net.HttpWebResponse)request.GetResponse();
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System.IO.Stream s;
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s = response.GetResponseStream();
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string StrDate = "";
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string strValue = "";
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byte[] tt = StreamToBytes(s);
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//將流保存在c盤test.png文件下
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System.IO.File.WriteAllBytes(@"d:\test.png", tt);
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}
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///將數(shù)據(jù)流轉(zhuǎn)為byte[]
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public static byte[] StreamToBytes(Stream stream)
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{
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List<byte> bytes = new List<byte>();
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int temp = stream.ReadByte();
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while (temp != -1)
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{
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bytes.Add((byte)temp);
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temp = stream.ReadByte();
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}
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return bytes.ToArray();
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}
最后保存在d盤的圖片就是推廣二維碼，可以講服務(wù)器連接地址發(fā)給微信小程序，供微信小程序調(diào)用。
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