/** * 获取图片验证码方法 * * @param appKey:应用Id * * @return SMSImageCodeReslut **/ public async Task <SMSImageCodeReslut> getImageCodeAsync(String appKey) { if (appKey == null) { throw new ArgumentNullException("Paramer 'appKey' is required"); } String postStr = ""; postStr = RongCloud.RONGCLOUDSMSURI + "/getImgCode.json"; postStr = postStr + ("?appKey=") + (HttpUtility.UrlEncode(appKey == null ? "" : appKey)); return((SMSImageCodeReslut)RongJsonUtil.JsonStringToObj <SMSImageCodeReslut>(await rongClient.ExecuteGetAsync(postStr))); }