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這篇文章主要介紹了C#如何生成帶二維碼的專屬微信公眾號推廣海報,具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
創(chuàng)新互聯(lián)從2013年開始,是專業(yè)互聯(lián)網(wǎng)技術(shù)服務(wù)公司,擁有項目成都網(wǎng)站設(shè)計、網(wǎng)站制作網(wǎng)站策劃,項目實施與項目整合能力。我們以讓每一個夢想脫穎而出為使命,1280元瑞金做網(wǎng)站,已為上家服務(wù),為瑞金各地企業(yè)和個人服務(wù),聯(lián)系電話:18982081108效果如下:

代碼實現(xiàn):
1.獲取臨時二維碼ticket
////// 獲取臨時二維碼ticket /// /// 場景值ID openid做場景值ID ///public static string CreateTempQRCode(string scene_str,string access_token) { var result = HttpUtility.SendPostHttpRequest($"https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={access_token}", "application/json", "{\"expire_seconds\": 2592000, \"action_name\": \"QR_STR_SCENE\", \"action_info\": {\"scene\": {\"scene_str\": \"" + scene_str + "\"}}}"); JObject jobect = (JObject)JsonConvert.DeserializeObject(result); string ticket = (string)jobect["ticket"]; if (string.IsNullOrEmpty(ticket)) { LogHelper.WriteLog(typeof(WeixinHelper), "獲取臨時二維碼ticket失敗" + result); return null; } return ticket; }
使用openid作為場景值的好處是通過掃A推廣的二維碼關(guān)注用戶的場景值便是A的openid。
2. 生成帶二維碼的專屬推廣圖片
////// 生成帶二維碼的專屬推廣圖片 /// /// ///public string Draw(WxUser user) { //背景圖片 string path = Server.MapPath("/Content/images/tg.jpg"); System.Drawing.Image imgSrc = System.Drawing.Image.FromFile(path); //處理二維碼圖片大小 240*240px System.Drawing.Image qrCodeImage = ReduceImage("https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket="+user.ticket, 240, 240); //處理頭像圖片大小 100*100px Image titleImage = ReduceImage(user.headimgurl, 100, 100); using (Graphics g = Graphics.FromImage(imgSrc)) { //畫專屬推廣二維碼 g.DrawImage(qrCodeImage, new Rectangle(imgSrc.Width - qrCodeImage.Width - 200, imgSrc.Height - qrCodeImage.Height - 200, qrCodeImage.Width, qrCodeImage.Height), 0, 0, qrCodeImage.Width, qrCodeImage.Height, GraphicsUnit.Pixel); //畫頭像 g.DrawImage(titleImage, 8, 8, titleImage.Width, titleImage.Height); Font font = new Font("宋體", 30, FontStyle.Bold); g.DrawString(user.nickname, font, new SolidBrush(Color.Red), 110, 10); } string newpath = Server.MapPath(@"/Content/images/newtg_" + Guid.NewGuid().ToString() + ".jpg"); imgSrc.Save(newpath, System.Drawing.Imaging.ImageFormat.Jpeg); return newpath; } /// /// 縮小/放大圖片 /// /// 圖片網(wǎng)絡(luò)地址 /// 縮小/放大寬度 /// 縮小/放大高度 ///public Image ReduceImage(string url, int toWidth, int toHeight) { WebRequest request = WebRequest.Create(url); WebResponse response = request.GetResponse(); Stream responseStream = response.GetResponseStream(); Image originalImage = Image.FromStream(responseStream); if (toWidth <= 0 && toHeight <= 0) { return originalImage; } else if (toWidth > 0 && toHeight > 0) { if (originalImage.Width < toWidth && originalImage.Height < toHeight) return originalImage; } else if (toWidth <= 0 && toHeight > 0) { if (originalImage.Height < toHeight) return originalImage; toWidth = originalImage.Width * toHeight / originalImage.Height; } else if (toHeight <= 0 && toWidth > 0) { if (originalImage.Width < toWidth) return originalImage; toHeight = originalImage.Height * toWidth / originalImage.Width; } Image toBitmap = new Bitmap(toWidth, toHeight); using (Graphics g = Graphics.FromImage(toBitmap)) { g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.Clear(Color.Transparent); g.DrawImage(originalImage, new Rectangle(0, 0, toWidth, toHeight), new Rectangle(0, 0, originalImage.Width, originalImage.Height), GraphicsUnit.Pixel); originalImage.Dispose(); return toBitmap; } }
3.將圖片上傳微信服務(wù)器,并發(fā)送給用戶
string imagePath = Draw(user);
string result = HttpUtility.UploadFile($"https://api.weixin.qq.com/cgi-bin/material/add_material?access_token={access_token}&type=image", imagePath);
JObject jObject = (JObject)JsonConvert.DeserializeObject(result);
string media_id = (string)jObject["media_id"];
if (!string.IsNullOrEmpty(media_id))
{
string resxml = "" + nowtime + " ";
return resxml;
}
LogHelper.WriteLog(typeof(WechatController), "上傳專屬推廣圖片素材失敗" + result);感謝你能夠認真閱讀完這篇文章,希望小編分享的“C#如何生成帶二維碼的專屬微信公眾號推廣海報”這篇文章對大家有幫助,同時也希望大家多多支持創(chuàng)新互聯(lián)成都網(wǎng)站設(shè)計公司,關(guān)注創(chuàng)新互聯(lián)成都網(wǎng)站設(shè)計公司行業(yè)資訊頻道,更多相關(guān)知識等著你來學(xué)習(xí)!
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