C#生成微信小程序文章二维码

/// <summary>/// 获取access_token/// </summary>/// <returns></returns>[HttpGet][Route("GetAccessToken")]public async Task<ActionResult> GetAccessToken(){string token = string.Empty;try{string wechatapi = "https://api.weixin.qq.com/";string appID = "wxc1aac131465e16b5";string appSecret = "ef392ad696f8ccbfd6659758ebead29c";//获取微信tokenstring token_url = wechatapi + "cgi-bin/token?grant_type=client_credential&appid=" + appID + "&secret=" + appSecret;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(token_url);request.Method = "GET";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream getImgStream = response.GetResponseStream();StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);string content = reader.ReadToEnd();response.Close();reader.Dispose();token = content;}catch (Exception ex){}return Ok(token);}/// <summary>/// B接口-微信小程序带参数二维码的生成/// </summary>/// <param name="access_token"></param>/// <returns></returns>[HttpGet][Route("CreateWxCode")]public async Task<ActionResult> CreateWxCode(string access_token){//适用于需要的码数量极多，或仅临时使用的业务场景//通过该接口生成的小程序码，永久有效，数量暂无限制。string postUrl = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + access_token;HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;request.Method = "POST";request.ContentType = "application/json;charset=UTF-8";string options = "{\"scene\":\"" + 1 + "\",\"page\":\"pages/home/home\",\"width\":\"150\"}";byte[] payload = Encoding.UTF8.GetBytes(options);request.ContentLength = payload.Length;Stream writer = request.GetRequestStream();writer.Write(payload, 0, payload.Length);writer.Close();System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();System.IO.Stream stream = response.GetResponseStream();List<byte> bytes = new List<byte>();int temp = stream.ReadByte();while (temp != -1){bytes.Add((byte)temp);temp = stream.ReadByte();}byte[] result = bytes.ToArray();string base64 = Convert.ToBase64String(result);//将byte[]转为base64var QRcode = ToImage(base64);CombineBitmap("D://EWM/immm/222.jpg", QRcode);return Ok("{\"errcode\":0,\"errmsg\":\"获取成功\",\"buffer\":\"" + base64 + "\"}");}private string ToImage(string base64String){byte[] bytes = Convert.FromBase64String(base64String);using (Image image = Image.FromStream(new MemoryStream(bytes))){var imgName = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";image.Save("D://EWM/" + imgName, System.Drawing.Imaging.ImageFormat.Jpeg);  // Or Pngreturn "D://EWM/" + imgName;}}public string CombineBitmap(string backgroundImg,string FrontImg){var imgName = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";String jpg3 = "D://EWM/" + imgName;Image img1 = Image.FromFile(FrontImg);Image img2 = Image.FromFile(backgroundImg);int width = img2.Width;int height = Math.Max(img1.Height, img2.Height);Bitmap img3 = new Bitmap(width, height);Graphics g = Graphics.FromImage(img3);g.Clear(Color.Black);g.DrawImage(img2, new Point(0, 0));g.DrawImage(img1, new Point(img2.Width - img1.Width, img2.Height - img1.Height));System.Drawing.Text.PrivateFontCollection font = new System.Drawing.Text.PrivateFontCollection();font.AddFontFile("E:/Orchard_GOV/OnonMRMS/src/OrchardCore.Onon/Onon.Gov/wwwroot/Fonts/MQG.ttf");//检测字体类型是否可用var r = font.Families[0].IsStyleAvailable(FontStyle.Regular);var b = font.Families[0].IsStyleAvailable(FontStyle.Bold);//定义成新的字体对象FontFamily myFontFamily = new FontFamily(font.Families[0].Name, font);Font myFont = new Font(myFontFamily, 22, FontStyle.Bold);//将字体显示到控件  //g.DrawString("这里输入文字", font, new SolidBrush(Color.Red), 15, 15);g.TranslateTransform(15, 15);//设置旋转角度g.RotateTransform(90);//画文字 g.DrawString("ᠮᠣᠩᠭᠣᠯ ᠬᠥᠮᠥᠨ ᠡᠨᠳᠡ ᠪᠠᠢᠨ᠎ᠠ", myFont, new SolidBrush(Color.White),60, -60);g.ResetTransform();g.Dispose();img2.Dispose();img1.Dispose();img3.Save(jpg3, System.Drawing.Imaging.ImageFormat.Jpeg);img3.Dispose();return jpg3;}
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