public bool DeleteImage(UploadImageViewModel uploadImageModel)
 {
     try
     {
         bool bl = UploadImageHelper.DeleteImage(uploadImageModel.mapPath);
         if (bl)
         {
             UpdateEMTenantLogoUrl(uploadImageModel.tenantCode, uploadImageModel.logoURL);
             return true;
         }
         else
             return false;
     }
     catch (Exception ex)
     {
         Logger.Info("DeleteImage(删除图片):"+ex.Message);
         return false;
     }
 }
 public bool UploadImage(UploadImageViewModel uploadImageModel)
 {
     try
     {
         bool bl = UploadImageHelper.GetUpoladImg(uploadImageModel.mapPath, uploadImageModel.imgName, uploadImageModel.buffer);
         if (bl)
         {
             IEMTenantService service = new EMTenantService();
             if (!string.IsNullOrEmpty(uploadImageModel.tenantCode))
             {
                 EMTenant emTenant = service.Select(uploadImageModel.tenantCode);
                 string oldLogoUrlName = emTenant.LogoUrl;
                 emTenant.LogoUrl = uploadImageModel.imgName;
                 service.Update(emTenant);
                 //判断是否默认图片
                 if (!string.IsNullOrEmpty(oldLogoUrlName))
                 {
                     string oldMapPath = uploadImageModel.mapPath + "\\" + oldLogoUrlName;
                     UploadImageHelper.DeleteImage(oldMapPath);
                 }
             }
             return true;
         }
         else
             return false;
     }
     catch (Exception ex)
     {
         Logger.Info("UploadImage(上传图片):"+ex.Message);
         return false;
     }
 }