微信小程序实现图片上传功能

data: { 
 productInfo: {} 
}, 
//添加Banner 
bindChooiceProduct: function () { 
 var that = this; 
 
 wx.chooseImage({ 
 count: 3, //最多可以选择的图片总数 
 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) { 
 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 
 var tempFilePaths = res.tempFilePaths; 
 //启动上传等待中... 
 wx.showToast({ 
 title: '正在上传...', 
 icon: 'loading', 
 mask: true, 
 duration: 10000 
 }) 
 var uploadImgCount = 0; 
 for (var i = 0, h = tempFilePaths.length; i < h; i++) { 
 wx.uploadFile({ 
 url: util.getClientSetting().domainName + '/home/uploadfilenew', 
 filePath: tempFilePaths[i], 
 name: 'uploadfile_ant', 
 formData: { 
 'imgIndex': i 
 }, 
 header: { 
 "Content-Type": "multipart/form-data" 
 }, 
 success: function (res) { 
 uploadImgCount++; 
 var data = JSON.parse(res.data); 
 //服务器返回格式: { "Catalog": "testFolder", "FileName": "1.jpg", "Url": "https://test.com/1.jpg" } 
 var productInfo = that.data.productInfo; 
 if (productInfo.bannerInfo == null) { 
 productInfo.bannerInfo = []; 
 } 
 productInfo.bannerInfo.push({ 
 "catalog": data.Catalog, 
 "fileName": data.FileName, 
 "url": data.Url 
 }); 
 that.setData({ 
 productInfo: productInfo 
 }); 
 
 //如果是最后一张,则隐藏等待中 
 if (uploadImgCount == tempFilePaths.length) { 
 wx.hideToast(); 
 } 
 }, 
 fail: function (res) { 
 wx.hideToast(); 
 wx.showModal({ 
 title: '错误提示', 
 content: '上传图片失败', 
 showCancel: false, 
 success: function (res) { } 
 }) 
 } 
 }); 
 } 
 } 
 }); 
} 

[HttpPost] 
public ContentResult UploadFileNew() 
{ 
 UploadFileDTO model = new UploadFileDTO(); 
 HttpPostedFileBase file = Request.Files["uploadfile_ant"]; 
 if (file != null) 
 { 
 //公司编号+上传日期文件主目录 
 model.Catalog = DateTime.Now.ToString("yyyyMMdd"); 
 model.ImgIndex = Convert.ToInt32(Request.Form["imgIndex"]); 
 
 //获取文件后缀 
 string extensionName = System.IO.Path.GetExtension(file.FileName); 
 
 //文件名 
 model.FileName = System.Guid.NewGuid().ToString("N") + extensionName; 
 
 //保存文件路径 
 string filePathName = System.IO.Path.Combine(CommonHelper.GetConfigValue("ImageAbsoluteFolderTemp"), model.Catalog); 
 if (!System.IO.Directory.Exists(filePathName)) 
 { 
 System.IO.Directory.CreateDirectory(filePathName); 
 } 
 //相对路径 
 string relativeUrl = CommonHelper.GetConfigValue("ImageRelativeFolderTemp"); 
 file.SaveAs(System.IO.Path.Combine(filePathName, model.FileName)); 
 
 //获取临时文件相对完整路径 
 model.Url = System.IO.Path.Combine(relativeUrl, model.Catalog, model.FileName).Replace("\\", "/"); 
 } 
 return Content(Newtonsoft.Json.JsonConvert.SerializeObject(model)); 
} 

/// <summary> 
/// 上传文件 返回数据模型 
/// </summary> 
public class UploadFileDTO 
{ 
 /// <summary> 
 /// 目录名称 
 /// </summary> 
 public string Catalog { set; get; } 
 /// <summary> 
 /// 文件名称，包括扩展名 
 /// </summary> 
 public string FileName { set; get; } 
 /// <summary> 
 /// 浏览路径 
 /// </summary> 
 public string Url { set; get; } 
 /// <summary> 
 /// 上传的图片编号(提供给前端判断图片是否全部上传完) 
 /// </summary> 
 public int ImgIndex { get; set; } 
} 

#region 获取配置文件Key对应Value值 
/// <summary> 
/// 获取配置文件Key对应Value值 
/// </summary> 
/// <param name="key"></param> 
/// <returns></returns> 
public static string GetConfigValue(string key) 
{ 
 return ConfigurationManager.AppSettings[key].ToString(); 
} 
#endregion

<appSettings> 
 <!--图片临时文件夹 绝对路径--> 
 <add key="ImageAbsoluteFolderTemp" value="D:\Images\temp" /> 
 <!--图片正式文件夹 绝对路径--> 
 <add key="ImageAbsoluteFolderFinal" value="D:\Images\product" /> 
 
 <!--图片临时文件夹 相对路径--> 
 <add key="ImageRelativeFolderTemp" value="http://192.168.1.79:9009/temp"/> 
 <!--图片正式文件夹 相对路径--> 
 <add key="ImageRelativeFolderFinal" value="http://192.168.1.79:9009/product"/> 
</appSettings>