微信JS-SDK上传多张照片

<script src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>
    <script type="text/javascript">
        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: ‘@CommonOperate.GetJsSdkUiPackage().AppId‘, // 必填，公众号的唯一标识
            timestamp: @CommonOperate.GetJsSdkUiPackage().Timestamp, // 必填，生成签名的时间戳
            nonceStr: ‘@CommonOperate.GetJsSdkUiPackage().NonceStr‘, // 必填，生成签名的随机串
            signature: ‘@CommonOperate.GetJsSdkUiPackage().Signature‘, // 必填，签名
            jsApiList: [ //必填，需要使用的JS接口列表，所有JS接口列表见附录2
                ‘checkJsApi‘,
                ‘chooseImage‘,
                ‘previewImage‘,
                ‘uploadImage‘,
                ‘downloadImage‘,
                ‘getLocation‘,
                ‘openLocation‘
            ] 
        });

/// <summary>
/// 上传微信照片
/// </summary>
/// <param name="repairId"></param>
/// <param name="mediaId"></param>
/// <returns></returns>
[HttpPost]
public JsonResult UploadWxImage(int repairId, string mediaId)
{
	using (MemoryStream stream = new MemoryStream())
	{
		CommonOperate.GetMedia(mediaId, stream);
		stream.Position = 0;
		string localPath = Server.MapPath($"~/Content/{Guid.NewGuid()}.jpg");
		try
		{
			System.Drawing.Image imgLocal = System.Drawing.Image.FromStream(stream);
			imgLocal.Save(localPath);
		}