微信小程序实现图片上传功能

前端代码

 

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) { }
            })
          }
        });
      }
    }
  });
}

后端上传代码(将文件上传到服务器临时文件夹内)

 

 

[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

设置配置文件上传文件对应的文件夹信息

 

 

<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>

PS：上传到服务器的临时文件夹