微信小程序图片上传后台接口

/// <summary>
        /// 图片上传保存
        /// </summary>
        /// <returns></returns>
        [HttpPost]
        public IHttpActionResult PictureUpload() {
            try
            {
                var picturePath = "";
                const string fileTypes = "gif,jpg,jpeg,png,bmp";//运行上传的图片文件格式
                var content = Request.Content;//获取或设置 HTTP 消息的内容（当需要获取HTTP信息是会使用到）
                const string tempUploadFiles = "/UploadFile/"; //保存路径
                var newFilePath = DateTime.Now.ToString("yyyy-MM-dd") + "/";

                var memoryStreamProvider = new MultipartMemoryStreamProvider();//获取图片文件流信息
                Task.Run(async () => await Request.Content.ReadAsMultipartAsync(memoryStreamProvider)).Wait();
                foreach (var item in memoryStreamProvider.Contents)
                {
                    if (item.Headers.ContentDisposition.FileName == null) continue;

                    var filename = item.Headers.ContentDisposition.FileName.Replace("\"", "");
                    var file = new FileInfo(filename);


                    //upload fail（判断是否是运行上传的图片格式）
                    if (Array.IndexOf(fileTypes.Split(','), file.Extension.Substring(1).ToLower()) == -1)
                    {
                        return Json(new { code = 0, picturePath = "", msg = "不支持上传文件类型" });
                    }

                    //获取后缀
                    var extension = Path.GetExtension(filename);

                    var newFileName = Guid.NewGuid().ToString() + extension;//重命名

                    if (!Directory.Exists(HostingEnvironment.MapPath("/") + tempUploadFiles + newFilePath))
                    {
                        Directory.CreateDirectory(HostingEnvironment.MapPath("/") + tempUploadFiles + newFilePath);
                    }

                    var filePath = Path.Combine(HostingEnvironment.MapPath("/") + tempUploadFiles + newFilePath, newFileName);

                    picturePath = Path.Combine(tempUploadFiles + newFilePath, newFileName);//图片相对路径

                    var result = item.ReadAsStreamAsync().Result;

                    using (var br = new BinaryReader(result))
                    {
                        var data = br.ReadBytes((int)result.Length);
                        File.WriteAllBytes(filePath, data);//保存图片
                    }
                }

                //save successfully
                return Json(new { code = 1, picturePath = picturePath, msg = "图片上传成功~" });
            }
            catch (Exception ex)
            {
                return Json(new { code = 0, msg = ex.Message });
            }
        }

前台代码：

<template>
    <view class="main">
        <image :src="imgSrc" mode="aspectFill"></image>
        <button type="primary" @tap="imguplod()">图片上传</button>
    </view>
</template>

<script>
    export default {
        data() {
            return {
                imgSrc: ""
            }
        },
        methods: {
            imguplod() {
                let self = this;
                uni.chooseImage({
                    sourceType: ['camera', 'album'],
                    sizeType: ['compressed', 'original'],
                    count: 1,
                    success: (res) => {
                        console.log(res)
                        var tempFilePaths = res.tempFilePaths;
                        for (var i = 0; i < tempFilePaths.length; i++) {
                            console.log('图片地址名称' + tempFilePaths[i]);
                            wx.uploadFile({
                                //url: 'http://192.168.1.222:4380/api/upload/photo',
                                url: 'http://localhost:3233/api/ImgUpload/PictureUpload',
                                filePath: tempFilePaths[i], //获取图片路径
                                formData: {
                                    'telephone': 'telephone'
                                },
                                header: {
                                    'content-type': 'multipart/form-data'
                                },
                                name: 'upload',
                                success(res) {
                                    console.log(res)
                                    var result = JSON.parse(res.data);
                                    // self.imgSrc='http://192.168.1.222:4380/'+result.picturePath;


                                    if (result.ok) {
                                        self.imgSrc = result.d;
                                    } else {
                                        uni.showToast({
                                            icon: 'none',
                                            title: result.msg
                                        })
                                    }
                                }
                            })
                        }
                    }
                })
            }
        }
    }
</script>

<style>
</style>