调用微信网页开发接口上传图片
<div style="font-size:18px;margin-left:5px;color:#727071">团队风采<span style="font-size:12px;margin-left:20px">(最多5张照片)</span></div> <div class="form-group" style="margin:0 15px;"> <div class="row piccontainer"> <div class="col-xs-6" id="picdiv" onclick="uploadImge()"> <img src="~/Content/img/WeiXin/Addpng.png" class="picimg" /> </div> </div> <input type="hidden" name="PicPath" value="" id="PicPath" /> </div>
后台需要用到的方法
//Action里执行一下就可以了 private void PrepareArg() { // return; var url = Request.Url.ToString(); var timestamp = CommonUtil.ConvertDateTimeInt(DateTime.Now).ToString(); var nonceStr = CommonUtil.RndString(10); var signature = WeChatClient.GetJsSignature(url, nonceStr, timestamp); ViewBag.timestamp = timestamp; ViewBag.nonceStr = nonceStr; ViewBag.signature = signature; }
public ActionResult UploadImge(string serverId)//原图 { var headPath = "/UploadImage/" + DateTime.Now.ToString("yyyyMM"); string AbsoluteFilePath = Server.MapPath(headPath); if (!Directory.Exists(AbsoluteFilePath)) { Directory.CreateDirectory(AbsoluteFilePath); } string imgPath = headPath + "/" + DateTime.Now.ToString("yyyyMMddHHmm") + serverId + ".jpg"; string AbsolutePath = Server.MapPath(imgPath); WeChatClient.SaveMultimedia(serverId, AbsolutePath); return Json(imgPath); } public ActionResult UploadImge2(string serverId)//按3比4比例裁剪 { var headPath = "/UploadImage/" + DateTime.Now.ToString("yyyyMM"); string AbsoluteFilePath = Server.MapPath(headPath); if (!Directory.Exists(AbsoluteFilePath)) { Directory.CreateDirectory(AbsoluteFilePath); } string imgPath = headPath + "/" + DateTime.Now.ToString("yyyyMMddHHmm") + serverId + ".jpg"; string AbsolutePath = Server.MapPath(imgPath); WeChatClient.SaveMultimedia(serverId, AbsolutePath); CommonUtil.MakeThumbnail(AbsolutePath, AbsolutePath.Replace(".jpg", "_2.jpg"),3, 4); return Json(imgPath); } public ActionResult UploadImge3(string serverId)//按4比3裁剪 { var headPath = "/UploadImage/" + DateTime.Now.ToString("yyyyMM"); string AbsoluteFilePath = Server.MapPath(headPath); if (!Directory.Exists(AbsoluteFilePath)) { Directory.CreateDirectory(AbsoluteFilePath); } string imgPath = headPath + "/" + DateTime.Now.ToString("yyyyMMddHHmm") + serverId + ".jpg"; string AbsolutePath = Server.MapPath(imgPath); WeChatClient.SaveMultimedia(serverId, AbsolutePath); CommonUtil.MakeThumbnail(AbsolutePath, AbsolutePath.Replace(".jpg", "_3.jpg"), 4, 3); return Json(imgPath); }
CommonUtil里裁剪图片方法
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int bw = 4, int bh = 3) { try { Image originalImage = Image.FromFile(originalImagePath); var bl = originalImage.Height * 1.00 / originalImage.Width; int orgWith, orgHeight, startY = 0, startX = 0, newWith, newHeight = 0; var bd = bh * 1.00 / bw; if (bl > bd) { orgWith = originalImage.Width; orgHeight = (int)(originalImage.Width * bh / bw); startY = (originalImage.Height - orgHeight) / 2; newWith = orgWith; if (newWith > 720) { newWith = 720; } newHeight = (int)(newWith * bh / bw); } else { orgWith = originalImage.Height * bw / bh; orgHeight = originalImage.Height; startX = (originalImage.Width - orgWith) / 2; newWith = orgWith; if (newWith > 720) { newWith = 720; } newHeight = (int)(newWith * bh / bw); } Bitmap destBitmap = new Bitmap(newWith, newHeight);//目标图 Rectangle destRect = new Rectangle(0, 0, newWith, newHeight);//矩形容器 Rectangle srcRect = new Rectangle(startX, startY, orgWith, orgHeight); var g = Graphics.FromImage(destBitmap); //设置高质量插值法 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //设置高质量,低速度呈现平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //清空画布并以透明背景色填充 g.Clear(Color.Transparent); try { g.DrawImage(originalImage, destRect, srcRect, GraphicsUnit.Pixel); destBitmap.Save(thumbnailPath, originalImage.RawFormat); } catch (System.Exception e) { } finally { originalImage.Dispose(); destBitmap.Dispose(); g.Dispose(); } } catch (Exception) { } }
页面调用js方法
<script src="~/Scripts/jweixin-1.2.0.js"></script>
<script>
var uploadNum = 0;
wx.config({
debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId: '********', // 必填，公众号的唯一标识
timestamp: '@(ViewBag.timestamp)', // 必填，生成签名的时间戳
nonceStr: '@(ViewBag.nonceStr)', // 必填，生成签名的随机串
signature: '@(ViewBag.signature)',// 必填，签名，见附录1
jsApiList: ['chooseImage', 'previewImage', 'uploadImage', 'downloadImage', 'getLocalImgData'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});
function uploadImge() {
var ttnum = 5 - uploadNum;
wx.chooseImage({
count: ttnum, // 默认9
sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
success: function (res) {
var localIds = res.localIds; // 返回选定照片的本地ID列表，localId可以作为img标签的src属性显示图片
uploadImg(localIds, 0);
}
});
}
function uploadImg(localIds, num) {
if (localIds.length <= num) {
return;
}
var localId = localIds[num];
wx.uploadImage({
localId: localId, // 需要上传的图片的本地ID，由chooseImage接口获得
isShowProgressTips: 1, // 默认为1，显示进度提示
success: function (sres) {
var serverId = sres.serverId; // 返回图片的服务器端ID
$.post("/WeiXin/Home/UploadImge2", { serverId: serverId }, function (data) {
var picPath = $("#PicPath").val();
if (picPath == "") {
picPath = data;
} else {
picPath = picPath + "," + data;
}
$("#PicPath").val(picPath);
var temphtml = "";
if (window.__wxjs_is_wkwebview) {
wx.getLocalImgData({
localId: localId, // 图片的localID
success: function (res) {
var localData = res.localData; // localData是图片的base64数据，可以用img标签显示
temphtml = '<div class="col-xs-6"><img src="/Content/img/叉-m.png" style="width:20px;height:20px;position:absolute;z-index:2;right:15px;" onclick="delimg(this,\'' + data + '\')"/><img src="' + localData + '" class="picimg" style="z-index:1;position:absolute"/>';
$("#picdiv").before(temphtml);
uploadNum = uploadNum + 1;
if (uploadNum >= 5) {
$("#picdiv").hide();
}
uploadImg(localIds, num + 1)
}
});
} else {
temphtml = '<div class="col-xs-6"><img src="/Content/img/叉-m.png" style="width:20px;height:20px;position:absolute;z-index:2;right:15px;" onclick="delimg(this,\'' + data + '\')"/><img src="' + localId + '" class="picimg" style="z-index:1;position:absolute"/>';
$("#picdiv").before(temphtml);
uploadNum = uploadNum + 1;
if (uploadNum >= 5) {
$("#picdiv").hide();
}
uploadImg(localIds, num + 1)
}
})
}
});
}
function delimg(obj,path)
{
if (confirm("确定删除？")) {
$(obj).parent().remove();
var picPath = $("#PicPath").val();
var str = "";
if (picPath == "" || picPath.indexOf(',') == -1) {
picPath = "";
} else {
var patharray = picPath.split(',');
for(var i=0;i<patharray.length;i++)
{
if (patharray[i] != path)
{
str = str + patharray[i] + ",";
}
}
str = str.substring(0, str.length - 1);
picPath = str;
}
$("#PicPath").val(picPath);
uploadNum = uploadNum - 1;
}
}
</script>
效果展示
